diff --git a/.github/workflows/production.yml b/.github/workflows/production.yml index c2abe0ab7..8fcb70303 100644 --- a/.github/workflows/production.yml +++ b/.github/workflows/production.yml @@ -26,23 +26,25 @@ jobs: # Steps represent a sequence of watermark that will be executed as part of the job steps: - # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it - name: Checkout - uses: actions/checkout@v2 + uses: actions/checkout@v4 with: - submodules: true # Fetch Hugo themes - fetch-depth: 0 # Fetch all history for .GitInfo and .Lastmod + submodules: true + fetch-depth: 0 - name: Checkout theme repo - uses: actions/checkout@main + uses: actions/checkout@v4 with: repository: groupdocs/tutorials-theme token: ${{ secrets.REPO_TOKEN }} fetch-depth: 0 path: themes/tutorials-theme + - name: Setup Node.js + uses: actions/setup-node@v4 + with: + node-version: '22' - name: Install Theme Dependencies run: npm install - working-directory: ./themes/tutorials-theme - # Step 2 - Sets up the latest version of Hugo + working-directory: ./themes/tutorials-theme - name: Setup Hugo uses: peaceiris/actions-hugo@v3 with: @@ -54,7 +56,6 @@ jobs: run: npm install -D --save postcss-cli - name: Install Dependicies3 run: npm install -D postcss - # Also specifies the theme we want to use - name: Build run: hugo --configDir config/watermark --environment production --minify diff --git a/.github/workflows/staging.yml b/.github/workflows/staging.yml index d8d7d1898..be918b6ed 100644 --- a/.github/workflows/staging.yml +++ b/.github/workflows/staging.yml @@ -22,7 +22,7 @@ jobs: # This workflow contains a single job called "build" build: # The type of runner that the job will run on - runs-on: macos-latest + runs-on: ubuntu-latest # Steps represent a sequence of watermark that will be executed as part of the job steps: @@ -39,12 +39,19 @@ jobs: token: ${{ secrets.REPO_TOKEN }} ref: beta fetch-depth: 0 - path: themes/tutorials-theme + path: themes/tutorials-theme + - name: Setup Node.js + uses: actions/setup-node@v4 + with: + node-version: '22' + - name: Install Theme Dependencies + run: npm install + working-directory: ./themes/tutorials-theme # Step 2 - Sets up the latest version of Hugo - name: Setup Hugo uses: peaceiris/actions-hugo@v2 with: - hugo-version: '0.97.3' + hugo-version: 'latest' extended: true - name: Install Dependicies1 run: npm install -D --save autoprefixer diff --git a/content/arabic/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/arabic/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..c46f710d6 --- /dev/null +++ b/content/arabic/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,262 @@ +--- +date: '2026-07-30' +description: تعلم كيفية تعيين الترخيص لـ GroupDocs.Watermark في Java، احمِ مستنداتك + بفعالية وادِر الاستخدام بكفاءة. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: كيفية تعيين الترخيص لـ GroupDocs.Watermark في Java. يوضح لك هذا الدليل + خطوات تثبيت SDK، الحصول على metered key، وتكوين الترخيص لتأمين مستنداتك. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: كيفية تعيين الترخيص لـ GroupDocs Watermark في Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: كيفية تعيين الترخيص لـ GroupDocs Watermark في Java +type: docs +url: /ar/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# كيفية تعيين الترخيص لـ GroupDocs Watermark في Java + +Protecting intellectual property is a top priority for modern applications, and watermarks are a proven way to deter unauthorized distribution. If you’re using **GroupDocs.Watermark for Java**, you’ll need a license that can track usage and scale with demand. This tutorial explains **how to set license** for GroupDocs.Watermark in Java, from installing the SDK to configuring a metered key that reports consumption back to the service. + +## إجابات سريعة +- **ما هو الترخيص القائم على الاستخدام؟** إنه ترخيص يعتمد على الاستخدام يسجل كل استدعاء API، مما يتيح لك الدفع فقط مقابل ما تستهلكه. +- **هل أحتاج إلى تجربة أولاً؟** نعم، يمكنك طلب ترخيص مؤقت من موقع GroupDocs لتقييم المنتج. +- **ما نسخة Java المطلوبة؟** Java 8 أو أحدث؛ تم تجميع SDK لـ JDK 8+. +- **هل يمكنني التحويل إلى ترخيص دائم لاحقًا؟** بالتأكيد – فقط استبدل مفاتيح الترخيص القائم على الاستخدام بملف ترخيص دائم. +- **هل الإعداد متوافق مع Maven؟** نعم، تم توفير إحداثيات Maven لإدارة الاعتمادات بسلاسة. + +## ما هو الترخيص القائم على الاستخدام لـ GroupDocs Watermark؟ +الترخيص القائم على الاستخدام هو امتياز مدعوم بالسحابة توفره GroupDocs يسجل كل عملية وضع علامة مائية يتم تنفيذها بواسطة SDK. يتم تسجيل كل استدعاء API على خادم ترخيص GroupDocs، مما يتيح الفوترة بنظام الدفع حسب الاستخدام بناءً على الاستخدام الفعلي. يمنح هذا النموذج المطورين رؤية فورية لاستهلاك الموارد ويساعد في التحكم في التكاليف مع ضمان الوصول الكامل إلى جميع الميزات. + +## لماذا استخدام ترخيص قائم على الاستخدام مع GroupDocs Watermark؟ +يدعم GroupDocs.Watermark أكثر من خمسين تنسيقًا للإدخال والإخراج — بما في ذلك PDF و DOCX و PPTX وأنواع الصور المختلفة — ويمكنه معالجة ملفات تصل إلى 1 GB دون تحميل المستند بالكامل في الذاكرة، مما يحافظ على الأداء. باستخدام ترخيص قائم على الاستخدام تدفع فقط مقابل العمليات التي تنفذها فعليًا، مما يسمح للحل بالتوسع بتكلفة فعّالة مع الحفاظ على الوصول الكامل إلى جميع الميزات. + +## المتطلبات المسبقة +- **GroupDocs.Watermark for Java** الإصدار 24.11 أو أحدث. +- مجموعة تطوير Java (JDK) 8 أو أحدث مثبتة ومُكوَّنة. +- إلمام أساسي بـ Maven أو إدارة ملفات JAR يدويًا. +- مفتاح ترخيص مؤقت أو دائم من بوابة GroupDocs. + +## كيفية تعيين ترخيص قائم على الاستخدام لـ GroupDocs Watermark في Java؟ +حمّل مفاتيحك العامة والخاصة، أنشئ كائن `Metered`، وطبق الترخيص — كل ذلك في ثلاث خطوات مختصرة. يضمن هذا النهج أن يتم احتساب كل طلب وضع علامة مائية ضد حسابك، مما يمنحك رؤية كاملة لاستهلاك الموارد. + +### الخطوة 1: تعريف المفاتيح العامة والخاصة +Enter the keys you received after registering for a temporary license. + +`Metered` هو فئة GroupDocs.Watermark التي تتعامل مع الترخيص القائم على الاستخدام وتتبع الاستخدام. +*ضع مفاتيحك في موقع آمن (متغيرات البيئة، تكوين مشفر، إلخ) قبل استخدامها في الشيفرة.* + +### الخطوة 2: إنشاء مثال من فئة Metered +Instantiate the `Metered` object with your keys. This object will be passed to the watermark engine during initialization. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### الخطوة 3: تعيين الترخيص القائم على الاستخدام باستخدام المفاتيح المقدمة +Call the `setLicense` method (or the equivalent API call) with your public and private keys. Once set, all subsequent watermark operations will be billed according to your usage. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **نصيحة احترافية:** احفظ المفاتيح خارج التحكم في المصدر. استخدم مدير أسرار أو ملف خصائص مشفر لتجنب الكشف غير المقصود. + +## إعداد GroupDocs.Watermark لـ Java + +### معلومات التثبيت + +Integrate GroupDocs.Watermark into your project using Maven or by downloading the JAR directly. + +**إعداد Maven:** +Add the following configuration in your `pom.xml` file: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**تحميل مباشر:** +Download the latest version from [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### الحصول على الترخيص + +To unlock full functionality, obtain a free trial or temporary license: + +- سجّل في [موقع GroupDocs](https://purchase.groupdocs.com/temporary-license/) للبدء. +- بعد الحصول على مفاتيحك، دمجها في مشروعك كما هو موضح في دليل التنفيذ. + +### التهيئة الأساسية والإعداد + +Once the SDK is added to your project, import the necessary namespaces and create the watermark engine instance as demonstrated in the code snippets above. + +## نصائح استكشاف الأخطاء وإصلاحها +- **مفاتيح غير صالحة:** تحقق مرة أخرى من تطابق المفاتيح العامة والخاصة تمامًا؛ أي خطأ إملائي واحد سيمنع التفعيل. +- **أخطاء مسار ملف الترخيص:** إذا كنت تفضّل ترخيصًا قائمًا على ملف، تأكد من أن مسار الملف مطلق أو يتم حله بشكل صحيح بالنسبة إلى دليل العمل. +- **مشكلات الشبكة:** يتطلب الترخيص القائم على الاستخدام استدعاءات HTTPS صادرة؛ تحقق من أن جدار الحماية يسمح بالاتصال بـ `api.groupdocs.com`. + +## تطبيقات عملية +1. **أمان المستندات:** أضف علامات مائية مرئية أو غير مرئية إلى ملفات PDF ومستندات Word والصور لحماية البيانات الحساسة للشركة. +2. **تتبع الاستخدام:** أنشئ تقارير عن عدد المستندات التي تم وضع علامة مائية عليها يوميًا، مفيدة للميزانية والامتثال. +3. **تكامل CMS:** أتمتة إدراج العلامة المائية أثناء سير عمل نشر المحتوى، مع تطبيق الترخيص تلقائيًا. + +## اعتبارات الأداء + +**تحسين الأداء:** +- ضع العلامات المائية فقط عند الضرورة؛ تخطى معالجة الملفات التي تم حمايتها بالفعل. +- بالنسبة للدفعات الكبيرة، أعد استخدام نفس مثال `WatermarkEngine` لتجنب عبء التهيئة المتكرر. + +**أفضل الممارسات:** +- راقب استخدام ذاكرة JVM heap عند معالجة ملفات PDF التي تحتوي على مئات الصفحات؛ فكر في استخدام واجهات برمجة التطبيقات المتدفقة إذا أصبحت الذاكرة عنق زجاجة. +- فعّل التسجيل على مستوى `INFO` لالتقاط استدعاءات الترخيص دون إغراق وحدة التحكم. + +## الخلاصة + +في هذا الدليل غطينا **كيفية تعيين الترخيص** لـ GroupDocs.Watermark في Java، من تثبيت Maven إلى تكوين المفتاح القائم على الاستخدام. باتباع الخطوات، ستحصل على تتبع دقيق للاستخدام، وفوترة مرنة، وحماية مستندات قوية — كل ذلك دون التضحية بالأداء. + +**الخطوات التالية:** +- جرّب أنماط علامات مائية مختلفة (نص، صورة، مائل). +- استكشف الميزات المتقدمة مثل العلامات المائية الشرطية بناءً على أدوار المستخدم. +- راجع لوحة تحكم تحليلات GroupDocs لمراقبة اتجاهات الاستهلاك. + +هل أنت مستعد لحماية مستنداتك؟ نفّذ الحل اليوم وتمتع براحة البال مع العلم أن أصولك محمية وتكاليف الترخيص واضحة. + +## الأسئلة المتكررة + +**س: ما الفرق بين الترخيص المؤقت والترخيص الدائم؟** +الترخيص المؤقت محدود بالوقت ومثالي للتقييم، بينما يوفر الترخيص الدائم استخدامًا غير محدود دون رسوم متكررة. + +**س: هل يمكنني التحويل من ترخيص قائم على الاستخدام إلى ترخيص دائم دون تغييرات في الشيفرة؟** +نعم — استبدل تهيئة المفتاح القائم على الاستخدام بنداء إلى `engine.setLicense("path/to/license/file")`. + +**س: ماذا يحدث إذا كان خدمة الترخيص القائم على الاستخدام غير متاحة؟** +يتحول SDK إلى وضع غير متصل؛ تستمر عملية وضع العلامة المائية لكن لن يتم الإبلاغ عن الاستخدام حتى يتم استعادة الاتصال. + +**س: هل هناك حدود لحجم الملفات للعلامة المائية؟** +يمكن لـ SDK معالجة ملفات تصل إلى 1 GB؛ يجب تقسيم الملفات الأكبر أو معالجتها في وضع التدفق. + +**س: هل يعمل الترخيص القائم على الاستخدام على جميع أنظمة التشغيل؟** +يعمل على أي منصة تدعم Java 8+، بما في ذلك Windows و Linux و macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**الموارد** + +- [التوثيق](https://docs.groupdocs.com/watermark/java/) +- [مرجع API](https://reference.groupdocs.com/watermark/java) +- [تحميل](https://releases.groupdocs.com/watermark/java/) +- [مستودع GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [منتدى الدعم المجاني](https://forum.groupdocs.com/c/watermark/10) +- [الحصول على ترخيص مؤقت](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## دروس ذات صلة + +- [دروس ترخيص وتكوين GroupDocs.Watermark لـ Java](/watermark/java/licensing-configuration/) +- [كيفية إعداد ترخيص GroupDocs.Watermark في Java: دليل كامل](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [دليل وضع العلامة المائية في Java: حماية المستندات باستخدام API الخاص بـ GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/arabic/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/arabic/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..890124480 --- /dev/null +++ b/content/arabic/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,251 @@ +--- +date: '2026-07-30' +description: تعلم كيفية وضع علامة مائية على PDF في Java عن طريق إضافة علامة مائية + نصية إلى تعليقات الصور في PDF باستخدام GroupDocs.Watermark، وحماية مستنداتك بفعالية. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: ضع علامة مائية على PDF في Java عبر إضافة علامة مائية نصية إلى تعليقات + الصور في PDF باستخدام GroupDocs.Watermark. احمِ مستنداتك بسرعة وموثوقية. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: وضع علامة مائية على PDF في Java – إضافة نص إلى تعليقات الصور +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: وضع علامة مائية على PDF في Java – إضافة نص إلى تعليقات الصور +type: docs +url: /ar/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# إضافة علامة مائية إلى PDF في جافا – إضافة نص إلى تعليقات الصور + +حماية ملفات PDF من التوزيع غير المصرح به هي مصدر قلق يومي للمطورين. **Watermark PDF Java** يتيح لك تضمين نص مرئي مباشرةً على تعليقات الصور، مما يضمن أن كل صفحة تحمل علامتك التجارية أو إشعار السرية. في هذا الدرس ستتعرف على سبب موثوقية هذا النهج، وما تحتاجه للبدء، وتنفيذ خطوة بخطوة باستخدام GroupDocs.Watermark لجافا. + +## إجابات سريعة +- **ما الذي تفعله المكتبة؟** تضيف أو تعدل أو تزيل العلامات المائية على ملفات PDF وWord وExcel والملفات الصورة. +- **ما هي الطريقة الأساسية لإنشاء العلامة المائية؟** `Watermark.add()` تُطبق على كائن `Annotation`. +- **هل أحتاج إلى ترخيص للتطوير؟** النسخة التجريبية المجانية تعمل للاختبار؛ الترخيص الدائم مطلوب للإنتاج. +- **هل يمكنني معالجة ملفات PDF الكبيرة؟** نعم – الـ API يبث الصفحات، ويتعامل مع ملفات > 500 ميغابايت دون تحميل المستند بالكامل في الذاكرة. +- **هل الحل آمن من حيث الخيوط (thread‑safe)؟** جميع الطرق العامة لا تحتفظ بحالة، لذا يمكنك تشغيل عدة نسخ متوازية بأمان. + +## ما هو watermark pdf java؟ +`watermark pdf java` يشير إلى القدرة على إضافة علامات مائية بصرية إلى مستندات PDF من خلال كود جافا، عادةً باستخدام مكتبة مثل GroupDocs.Watermark. يساعد ذلك على فرض الملكية أو السرية أو العلامة التجارية مباشرة داخل الملف مع الحفاظ على التخطيط الأصلي وإتاحة تحكم دقيق في المظهر والموقع. + +## لماذا تستخدم GroupDocs.Watermark لجافا؟ +GroupDocs.Watermark يدعم **أكثر من 50 تنسيقًا للإدخال والإخراج**، يعالج ملفات PDF التي تحتوي على مئات الصفحات في أقل من ثانيتين على الأجهزة القياسية، ولا يتطلب تثبيت عارض PDF كامل. محركه المدرك للتعليقات يحافظ على التخطيط الأصلي أثناء إدراج علامات مائية نصية مع إمكانية ضبط الشفافية، الدوران، وتنسيق الخط، مما يجعله خيارًا سريعًا وموثوقًا للعلامات المائية على مستوى المؤسسات. + +## المتطلبات المسبقة +- **Java Development Kit (JDK)** 8 أو أعلى. +- **Maven** (أو تضمين JAR يدوي) لإدارة الاعتمادات. +- إلمام أساسي بهيكل PDF ومفاهيم برمجة جافا. + +## ما هي المتطلبات المسبقة لإضافة علامة مائية إلى ملفات PDF في جافا؟ +تحتاج إلى JDK متوافق، Maven (أو ملفات JAR)، ورخصة GroupDocs.Watermark صالحة. تعمل المكتبة على أي نظام تشغيل يدعم Java 8+، وتدعم Java 11 و 17 والإصدارات LTS الأحدث. بالإضافة إلى ذلك، تأكد من أن مشروعك يمتلك ذاكرة heap كافية (على الأقل 2 جيجابايت) لمعالجة ملفات PDF الكبيرة وأن لديك صلاحيات كتابة في دليل الإخراج. + +## إعداد GroupDocs.Watermark لجافا +قبل كتابة أي كود، أضف المكتبة إلى مشروعك. + +### إعداد Maven +أضف ما يلي إلى ملف `pom.xml` الخاص بك: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### التحميل المباشر +بدلاً من ذلك، قم بتنزيل أحدث نسخة من [الإصدارات الأخيرة لـ GroupDocs.Watermark لجافا](https://releases.groupdocs.com/watermark/java/). + +#### الحصول على الترخيص +- **Free Trial** – استكشف الميزات الأساسية دون تكلفة. +- **Temporary License** – افتح جميع الإمكانات أثناء التطوير. +- **Purchase** – احصل على ترخيص دائم للاستخدام في الإنتاج ودعم مميز. + +### التهيئة الأساسية +`Watermark` هي الفئة (class) التي تمثل نقطة الدخول، تقوم بتحميل المستند، تطبيق كائنات العلامة المائية، وحفظ النتيجة. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## كيفية إضافة علامة مائية نصية إلى تعليقات الصور في PDF باستخدام GroupDocs.Watermark لجافا؟ +`Watermark.load()` يقوم بتحميل مستند PDF إلى واجهة Watermark API للمعالجة. `TextWatermark` يمثل علامة مائية نصية مع إمكانية تخصيص الخط، الحجم، اللون، الشفافية، والدوران. `ImageAnnotation` هي تعليقة PDF تحتوي على صورة مدمجة، يمكن استهدافها لإضافة علامة مائية. `annotation.addWatermark()` يرفق العلامة المائية التي تم إنشاؤها بالتعليقة، و`watermark.save()` يكتب المستند المعدل إلى المسار المحدد. + +حمّل ملف PDF الخاص بك باستخدام `Watermark.load("sample.pdf")`، أنشئ كائن `TextWatermark`، تكرّر على كل `ImageAnnotation`، واستدعِ `annotation.addWatermark(textWatermark)`. أخيرًا، احفظ المستند المعدل باستخدام `watermark.save("output.pdf")`. هذه العملية المختصرة تتعامل مع أي عدد من التعليقات في تمريرة واحدة وتحافظ على بيانات التعليقات الأصلية. + +### إضافة علامة مائية نصية إلى تعليقات الصور في PDF +الأقسام التالية توضح كل خطوة. + +#### الخطوة 1: تحميل مستند PDF +افتح ملف PDF المستهدف حتى يتمكن الـ API من فحص كائنات التعليقات الخاصة به. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### الخطوة 2: إنشاء العلامة المائية النصية +`TextWatermark` يمثل علامة مائية نصية مع إمكانية تخصيص الخط، الحجم، اللون، الشفافية، والدوران. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### الخطوة 3: تطبيق العلامة المائية على التعليقات +`ImageAnnotation` هي تعليقة PDF تحتوي على صورة مدمجة، يمكن استهدافها لإضافة علامة مائية. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### الخطوة 4: حفظ ملف PDF المموج بالعلامة المائية +`watermark.save()` يكتب المستند المعدل إلى المسار المحدد. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## المشكلات الشائعة والحلول +- **Missing Dependencies** – تحقق من أن جميع مكونات GroupDocs مدرجة في `pom.xml`. +- **File Path Issues** – استخدم مسارات مطلقة أو `Paths.get()` لتجنب مفاجآت المسارات النسبية. +- **Unsupported Annotation Types** – الـ API يتعامل حاليًا مع `ImageAnnotation` و`TextAnnotation` و`StampAnnotation`؛ الأنواع الأخرى تتطلب معالجة مخصصة. + +## التطبيقات العملية +إضافة علامة مائية نصية إلى تعليقات الصور في PDF مفيدة بشكل خاص لـ: +1. **Legal Documents** – وضع علامة على العقود بـ “سري – للاستخدام الداخلي فقط”. +2. **Confidential Reports** – منع التسريبات العرضية عن طريق تضمين علامة على مستوى الشركة. +3. **Marketing Materials** – وضع علامة تجارية على ملفات PDF الترويجية بغطاء نصي وشعار خفيف. +4. **Academic Drafts** – إشارة “مسودة – لا للتوزيع” على الأوراق البحثية قبل مراجعة الأقران. + +## اعتبارات الأداء +- **Batch Processing** – جمع عدة ملفات PDF في مجموعة خيوط واحدة لتقليل عبء JVM. +- **Memory Management** – المكتبة تبث الصفحات، لذا خصص على الأقل 2 جيجابايت من heap للملفات التي تتجاوز 200 ميغابايت. +- **Watermark Settings** – تقليل الشفافية (مثلاً 30 ٪) يقلل الفوضى البصرية مع الحفاظ على إمكانية الكشف. + +## الأسئلة المتكررة + +**س: هل يمكنني إضافة علامات مائية إلى أنواع تعليقات أخرى؟** +ج: نعم، يمكنك استهداف `TextAnnotation` أو `StampAnnotation` أو كائنات تعليقات مخصصة باستخدام نفس طريقة `addWatermark`. + +**س: هل هناك حد لعدد العلامات المائية التي يمكن وضعها على صفحة؟** +ج: لا يوجد حد صريح، لكن حافظ على إجمالي الشفافية أقل من 70 ٪ للحفاظ على قابلية القراءة وتجنب تدهور الأداء. + +**س: كيف يمكنني إزالة علامة مائية بعد تطبيقها؟** +ج: استخدم `annotation.removeWatermark(watermarkId)` أو استدعِ `Watermark.removeAll()` لإزالة جميع العلامات المائية من المستند. + +**س: هل تتعامل المكتبة مع ملفات PDF المحمية بكلمة مرور؟** +ج: نعم – قدم كلمة المرور عند تحميل المستند: `Watermark.load("secure.pdf", "myPassword")`. + +**س: ما هو الحد الأقصى لحجم الملف المدعوم؟** +ج: يمكن للـ API معالجة ملفات تصل إلى 2 جيجابايت على JVM 64‑بت؛ يجب تقسيم الملفات الأكبر إلى أقسام قبل إضافة العلامة المائية. + +## الموارد +- [توثيق GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [مرجع API](https://reference.groupdocs.com/watermark/java) +- [تنزيل GroupDocs.Watermark لجافا](https://releases.groupdocs.com/watermark/java/) +- [مستودع GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [منتدى الدعم المجاني](https://forum.groupdocs.com/c/watermark/10) +- [طلب ترخيص مؤقت](https://purchase.groupdocs.com/temporary-license/) + +--- + +**آخر تحديث:** 2026-07-30 +**تم الاختبار مع:** GroupDocs.Watermark 23.9 for Java +**المؤلف:** GroupDocs + +## دروس ذات صلة + +- [كيفية إضافة علامة مائية نصية إلى PDF باستخدام GroupDocs.Watermark لجافا (دليل 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [كيفية إضافة علامات مائية نصية وصورية إلى صفحات PDF محددة باستخدام GroupDocs.Watermark لجافا](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [الوصول والتكرار على مكونات PDF باستخدام GroupDocs.Watermark في جافا لتطبيق العلامات المائية على المستندات](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/chinese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/chinese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..08f1d2fb5 --- /dev/null +++ b/content/chinese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,260 @@ +--- +date: '2026-07-30' +description: 了解如何在 Java 中为 GroupDocs.Watermark 设置许可证，有效保护文档并高效管理使用。 +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: 如何在 Java 中为 GroupDocs.Watermark 设置许可证。本指南将指导您安装 SDK、获取计量密钥并配置许可证，以保护您的文档。 +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: 如何在 Java 中为 GroupDocs Watermark 设置许可证 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: 如何在 Java 中为 GroupDocs Watermark 设置许可证 +type: docs +url: /zh/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# 如何在 Java 中为 GroupDocs Watermark 设置许可证 + +保护知识产权是现代应用程序的首要任务，水印是阻止未经授权分发的有效手段。如果您正在使用 **GroupDocs.Watermark for Java**，则需要一个能够跟踪使用情况并随需求扩展的许可证。本教程解释了在 Java 中 **如何设置许可证**，从安装 SDK 到配置向服务报告消耗的计量密钥。 + +## 快速答案 +- **什么是计量许可证？** 它是一种基于使用量的许可证，记录每个 API 调用，让您只为实际消耗付费。 +- **我需要先获取试用吗？** 是的，您可以从 GroupDocs 网站请求临时许可证以评估产品。 +- **需要哪个 Java 版本？** Java 8 或更高；SDK 编译针对 JDK 8+。 +- **我可以以后切换到永久许可证吗？** 当然——只需用永久许可证文件替换计量密钥。 +- **此设置是否兼容 Maven？** 是的，提供了 Maven 坐标以实现无缝依赖管理。 + +## 计量许可证是什么？ +计量许可证是 GroupDocs 提供的云启用授权，记录 SDK 执行的每一次水印操作。每个 API 调用都会在 GroupDocs 的授权服务器上记录，基于实际使用量进行按需付费计费。该模型为开发者提供实时的消耗洞察，帮助控制成本，同时确保完整功能访问。 + +## 为什么在 GroupDocs Watermark 中使用计量许可证？ +GroupDocs.Watermark 支持超过五十种输入和输出格式——包括 PDF、DOCX、PPTX 以及各种图像类型，并且能够在不将整个文档加载到内存中的情况下处理高达 1 GB 的文件，从而保持性能。使用计量许可证，您只为实际运行的操作付费，使解决方案能够在成本有效的情况下扩展，同时保留对所有功能的完整访问。 + +## 先决条件 +- **GroupDocs.Watermark for Java** 版本 24.11 或更高。 +- 已安装并配置的 Java Development Kit (JDK) 8 或更高版本。 +- 对 Maven 或手动 JAR 管理有基本了解。 +- 来自 GroupDocs 门户的临时或永久许可证密钥。 + +## 如何在 Java 中为 GroupDocs Watermark 设置计量许可证？ + +加载您的公钥和私钥，创建 `Metered` 实例并应用许可证——全部在三个简洁的步骤中完成。这种方法确保每个水印请求都计入您的账户，让您对消耗有完整的可视性。 + +### 步骤 1：定义公钥和私钥 +输入您在注册临时许可证后收到的密钥。 + +`Metered` 是处理计量授权和使用跟踪的 GroupDocs.Watermark 类。 +*在代码中使用之前，请将密钥放置在安全位置（环境变量、加密配置等）。* + +### 步骤 2：创建 Metered 类的实例 +使用您的密钥实例化 `Metered` 对象。该对象将在初始化期间传递给水印引擎。 + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### 步骤 3：使用提供的密钥设置计量许可证 +使用您的公钥和私钥调用 `setLicense` 方法（或等效的 API 调用）。设置后，所有后续的水印操作将根据您的使用量计费。 + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **专业提示：** 将密钥保存在源代码控制之外。使用密钥管理器或加密的属性文件，以避免意外泄露。 + +## 为 Java 设置 GroupDocs.Watermark + +### 安装信息 + +使用 Maven 或直接下载 JAR，将 GroupDocs.Watermark 集成到您的项目中。 + +**Maven 设置：** +在您的 `pom.xml` 文件中添加以下配置： + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**直接下载：** +从 [GroupDocs.Watermark for Java 发布版](https://releases.groupdocs.com/watermark/java/) 下载最新版本。 + +### 许可证获取 + +要解锁全部功能，请获取免费试用或临时许可证： + +- 在 [GroupDocs 网站](https://purchase.groupdocs.com/temporary-license/) 注册以开始。 +- 获取密钥后，按照实现指南将其集成到项目中。 + +### 基本初始化和设置 + +将 SDK 添加到项目后，导入必要的命名空间并创建水印引擎实例，如上面的代码片段所示。 + +## 故障排除技巧 +- **无效密钥：** 仔细检查公钥和私钥是否完全匹配；任何一个拼写错误都会导致激活失败。 +- **许可证文件路径错误：** 如果您更喜欢基于文件的许可证，请确保文件路径是绝对路径或相对于工作目录正确解析。 +- **网络问题：** 计量授权需要向外部发起 HTTPS 调用；请确认防火墙允许访问 `api.groupdocs.com`。 + +## 实际应用 +1. **文档安全：** 为 PDF、Word 文档和图像添加可见或不可见的水印，以保护敏感的企业数据。 +2. **使用跟踪：** 生成每日水印文档数量的报告，有助于预算编制和合规性。 +3. **CMS 集成：** 在内容发布工作流中自动插入水印，许可证自动强制执行。 + +## 性能考虑因素 + +**优化性能：** +- 仅在必要时应用水印；对已受保护的文件跳过处理。 +- 对于大批量处理，复用同一个 `WatermarkEngine` 实例，以避免重复的初始化开销。 + +**最佳实践：** +- 在处理数百页的 PDF 时监控 JVM 堆使用情况；如果内存成为瓶颈，考虑使用流式 API。 +- 将日志级别设为 `INFO`，以捕获授权调用而不会使控制台信息过载。 + +## 结论 + +在本指南中，我们介绍了在 Java 中为 GroupDocs.Watermark **如何设置许可证**，从 Maven 安装到计量密钥配置。遵循这些步骤，您将获得精确的使用跟踪、灵活的计费以及强大的文档保护——且不影响性能。 + +**后续步骤：** +- 试验不同的水印样式（文字、图像、对角线）。 +- 探索高级功能，例如基于用户角色的条件水印。 +- 查看 GroupDocs 分析仪表板，监控消耗趋势。 + +准备好保护您的文档了吗？立即实现该解决方案，安心地知道您的资产受到保护，许可证费用透明可见。 + +## 常见问题 + +**Q: 临时许可证和永久许可证有什么区别？** +A: 临时许可证有时间限制，适合评估使用；永久许可证提供无限使用且无需周期性费用。 + +**Q: 我可以在不更改代码的情况下从计量许可证切换到永久许可证吗？** +A: 可以——将计量密钥初始化替换为对 `engine.setLicense("path/to/license/file")` 的调用。 + +**Q: 如果计量服务不可用会怎样？** +A: SDK 将回退到离线模式；水印仍会继续，但使用情况将在恢复连接后才会上报。 + +**Q: 水印对文件大小有限制吗？** +A: SDK 能处理最高 1 GB 的文件；更大的文件应拆分或使用流式模式处理。 + +**Q: 计量许可证在所有操作系统上都能工作吗？** +A: 它在任何支持 Java 8+ 的平台上均可运行，包括 Windows、Linux 和 macOS。 + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**资源** +- [文档](https://docs.groupdocs.com/watermark/java/) +- [API 参考](https://reference.groupdocs.com/watermark/java) +- [下载](https://releases.groupdocs.com/watermark/java/) +- [GitHub 仓库](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [免费支持论坛](https://forum.groupdocs.com/c/watermark/10) +- [临时许可证获取](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## 相关教程 + +- [GroupDocs.Watermark for Java 许可证和配置教程](/watermark/java/licensing-configuration/) +- [如何在 Java 中设置 GroupDocs.Watermark 许可证：完整指南](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java 水印指南：使用 GroupDocs.Watermark API 保护文档](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/chinese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/chinese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..f02f96e10 --- /dev/null +++ b/content/chinese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,249 @@ +--- +date: '2026-07-30' +description: 了解如何使用 GroupDocs.Watermark 在 Java 中通过向 PDF 图像批注添加文本水印来给 PDF 加水印，从而有效保护您的文档。 +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: 使用 GroupDocs.Watermark 在 Java 中通过向 PDF 图像批注添加文本水印来给 PDF 加水印，快速可靠地保护您的文档。 +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: 在 Java 中给 PDF 加水印 – 向图像批注添加文本 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: 在 Java 中给 PDF 加水印 – 向图像批注添加文本 +type: docs +url: /zh/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# 在 Java 中为 PDF 添加水印 – 为图像批注添加文本 + +保护 PDF 文件免受未经授权的分发是开发者的日常关注点。**Watermark PDF Java** 让您可以直接在图像批注上嵌入可见文本，确保每页都带有您的品牌或保密声明。在本教程中，您将了解为何此方法可靠、启动所需的条件，以及使用 GroupDocs.Watermark for Java 的逐步实现。 + +## 快速答案 +- **库的作用是什么？** 它可以在 PDF、Word、Excel 和图像文件上添加、编辑或移除水印。 +- **创建水印的主要方法是哪一个？** 对 `Annotation` 对象调用 `Watermark.add()`。 +- **开发时需要许可证吗？** 免费试用可用于测试；生产环境需要永久许可证。 +- **可以处理大型 PDF 吗？** 可以——API 会流式读取页面，处理 > 500 MB 的文件而无需将整个文档加载到内存中。 +- **解决方案是线程安全的吗？** 所有公共方法都是无状态的，您可以安全地并行运行多个实例。 + +## 什么是 watermark pdf java？ +`watermark pdf java` 指的是使用 Java 代码（通常通过 GroupDocs.Watermark 等库）向 PDF 文档添加可视水印的能力。它帮助在文件内部直接强制所有权、保密性或品牌标识，同时保持原始布局并对外观和位置进行细粒度控制。 + +## 为什么在 Java 中使用 GroupDocs.Watermark？ +GroupDocs.Watermark 支持 **50+ 输入和输出格式**，在标准硬件上可在 2 秒内处理数百页的 PDF，且无需安装完整的 PDF 查看器。其注释感知引擎在插入可调透明度、旋转和字体样式的文本水印时保持原始布局，使其成为企业级水印的快速、可靠选择。 + +## 前置条件 +- **Java Development Kit (JDK)** 8 或更高版本。 +- **Maven**（或手动引入 JAR）用于依赖管理。 +- 对 PDF 结构和 Java 编程概念有基本了解。 + +## 在 Java 中对 PDF 添加水印的前置条件是什么？ +您需要兼容的 JDK、Maven（或相应的 JAR 文件）以及有效的 GroupDocs.Watermark 许可证。该库可在任何支持 Java 8+ 的操作系统上运行，并兼容 Java 11、 17 以及更新的 LTS 版本。此外，请确保项目拥有足够的堆内存（至少 2 GB）以处理大型 PDF，并且对输出目录具有写入权限。 + +## 为 Java 设置 GroupDocs.Watermark +在编写任何代码之前，先将库添加到项目中。 + +### Maven 设置 +将以下内容添加到您的 `pom.xml` 文件中： +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### 直接下载 +或者，从 [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) 下载最新版本。 + +#### 许可证获取 +- **Free Trial** – 免费探索核心功能。 +- **Temporary License** – 在开发期间解锁全部功能。 +- **Purchase** – 获取永久许可证用于生产并获得高级支持。 + +### 基本初始化 +`Watermark` 是入口类，用于加载文档、应用水印对象并保存结果。 +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## 如何使用 GroupDocs.Watermark for Java 为 PDF 图像批注添加文本水印？ +`Watermark.load()` 将 PDF 文档加载到 Watermark API 进行处理。`TextWatermark` 表示可自定义字体、大小、颜色、透明度和旋转的文本水印。`ImageAnnotation` 是包含嵌入图像的 PDF 批注，可作为水印目标。`annotation.addWatermark()` 将创建的水印附加到批注上，`watermark.save()` 将修改后的文档写入指定路径。 + +加载 PDF（`Watermark.load("sample.pdf")`），创建 `TextWatermark` 实例，遍历每个 `ImageAnnotation` 并调用 `annotation.addWatermark(textWatermark)`。最后使用 `watermark.save("output.pdf")` 保存修改后的文档。此简洁流程一次性处理任意数量的批注，并保留原始批注元数据。 + +### 为 PDF 图像批注添加文本水印 +以下章节将逐步拆解每一步。 + +#### 步骤 1：加载 PDF 文档 +打开目标 PDF 文件，以便 API 检查其批注对象。 +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### 步骤 2：创建文本水印 +`TextWatermark` 表示可自定义字体、大小、颜色、透明度和旋转的文本水印。 +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### 步骤 3：将水印应用于批注 +`ImageAnnotation` 是包含嵌入图像的 PDF 批注，可作为水印目标。 +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### 步骤 4：保存带水印的 PDF +`watermark.save()` 将修改后的文档写入指定路径。 +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## 常见问题及解决方案 +- **缺少依赖** – 确认 `pom.xml` 中列出了所有 GroupDocs 构件。 +- **文件路径问题** – 使用绝对路径或 `Paths.get()` 以避免相对路径带来的意外。 +- **不支持的批注类型** – 当前 API 处理 `ImageAnnotation`、`TextAnnotation` 和 `StampAnnotation`；其他类型需自定义处理。 + +## 实际应用 +为 PDF 图像批注添加文本水印在以下场景特别有用： +1. **法律文件** – 在合同上标注 “Confidential – For Internal Use Only”。 +2. **机密报告** – 通过嵌入公司统一标签防止意外泄露。 +3. **营销材料** – 用细微的徽标文字覆盖为宣传 PDF 加上品牌。 +4. **学术草稿** – 在论文送审前标注 “Draft – Do Not Distribute”。 + +## 性能考虑 +- **批量处理** – 将多个 PDF 放入同一线程池以最小化 JVM 开销。 +- **内存管理** – 库采用流式读取页面，处理 > 200 MB 的文件时请分配至少 2 GB 堆内存。 +- **水印设置** – 降低透明度（例如 30 %）可减少视觉杂乱，同时仍可被检测到。 + +## 常见问答 + +**Q: 可以对其他批注类型添加水印吗？** +A: 可以，您可以使用相同的 `addWatermark` 方法针对 `TextAnnotation`、`StampAnnotation` 或自定义批注对象。 + +**Q: 在一页上放置水印的数量有限制吗？** +A: 没有硬性限制，但请将总透明度控制在 70 % 以下，以保持可读性并避免性能下降。 + +**Q: 如何在水印已应用后将其移除？** +A: 使用 `annotation.removeWatermark(watermarkId)` 或调用 `Watermark.removeAll()` 删除文档中的所有水印。 + +**Q: 库能处理受密码保护的 PDF 吗？** +A: 能——加载文档时提供密码，例如 `Watermark.load("secure.pdf", "myPassword")`。 + +**Q: 支持的最大文件大小是多少？** +A: 在 64‑bit JVM 上，API 可处理最高 2 GB 的文件；更大的文件应在水印前拆分为多个部分。 + +## 资源 +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 23.9 for Java +**Author:** GroupDocs + +## 相关教程 + +- [How to Add a Text Watermark to PDF Using GroupDocs.Watermark for Java (2023 Guide)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [How to Add Text and Image Watermarks to Specific PDF Pages Using GroupDocs.Watermark for Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Access and Iterate Over PDF Artifacts Using GroupDocs.Watermark in Java for Document Watermarking](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/czech/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/czech/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..641a769b0 --- /dev/null +++ b/content/czech/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,262 @@ +--- +date: '2026-07-30' +description: Naučte se, jak nastavit licenci pro GroupDocs.Watermark v Javě, efektivně + chránit své dokumenty a efektivně spravovat využití. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Jak nastavit licenci pro GroupDocs.Watermark v Javě. Tento průvodce + vás provede instalací SDK, získáním metered key a konfigurací licence pro zabezpečení + vašich dokumentů. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Jak nastavit licenci pro GroupDocs Watermark v Javě +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Jak nastavit licenci pro GroupDocs Watermark v Javě +type: docs +url: /cs/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Jak nastavit licenci pro GroupDocs Watermark v Javě + +Ochrana duševního vlastnictví je pro moderní aplikace nejvyšší prioritou a vodoznaky jsou osvědčený způsob, jak odradit neoprávněné šíření. Pokud používáte **GroupDocs.Watermark pro Javu**, budete potřebovat licenci, která dokáže sledovat využití a škálovat s poptávkou. Tento tutoriál vysvětluje **jak nastavit licenci** pro GroupDocs.Watermark v Javě, od instalace SDK až po konfiguraci měřeného klíče, který hlásí spotřebu zpět službě. + +## Rychlé odpovědi +- **Co je měřená licence?** Jedná se o licenci založenou na využití, která zaznamenává každé volání API, což vám umožňuje platit jen za to, co spotřebujete. +- **Potřebuji nejprve zkušební verzi?** Ano, můžete požádat o dočasnou licenci na stránkách GroupDocs k vyzkoušení produktu. +- **Jaká verze Javy je požadována?** Java 8 nebo novější; SDK je zkompilováno pro JDK 8+. +- **Mohu později přejít na trvalou licenci?** Rozhodně – stačí nahradit měřené klíče souborem s trvalou licencí. +- **Je nastavení kompatibilní s Maven?** Ano, Maven koordináty jsou poskytnuty pro bezproblémové řízení závislostí. + +## Co je měřená licence pro GroupDocs Watermark? +Měřená licence je cloud‑povolení poskytované společností GroupDocs, které zaznamenává každou operaci vodoznakování provedenou SDK. Každé volání API je zaznamenáno na licenčním serveru GroupDocs, což umožňuje fakturaci podle skutečného využití (pay‑as‑you‑go). Tento model poskytuje vývojářům v reálném čase přehled o spotřebě a pomáhá kontrolovat náklady při zachování plného přístupu ke všem funkcím. + +## Proč používat měřenou licenci s GroupDocs Watermark? +GroupDocs.Watermark podporuje více než padesát vstupních a výstupních formátů – včetně PDF, DOCX, PPTX a různých typů obrázků – a dokáže zpracovat soubory až do 1 GB, aniž by načítal celý dokument do paměti, což zachovává výkon. Používáním měřené licence platíte jen za operace, které skutečně spustíte, což umožňuje řešení škálovat nákladově efektivně a zároveň zachovat plný přístup ke všem funkcím. + +## Požadavky +- **GroupDocs.Watermark pro Javu** verze 24.11 nebo novější. +- Java Development Kit (JDK) 8 nebo novější, nainstalovaný a nakonfigurovaný. +- Základní znalost Maven nebo ručního správy JAR souborů. +- Dočasný nebo trvalý licenční klíč z portálu GroupDocs. + +## Jak nastavit měřenou licenci pro GroupDocs Watermark v Javě? +Nahrajte své veřejné a soukromé klíče, vytvořte instanci `Metered` a aplikujte licenci – vše ve třech stručných krocích. Tento přístup zajišťuje, že každý požadavek na vodoznakování je započítán na váš účet, což vám poskytuje úplnou přehlednost o spotřebě. + +### Krok 1: Definujte veřejný a soukromý klíč +Zadejte klíče, které jste obdrželi po registraci pro dočasnou licenci. + +`Metered` je třída GroupDocs.Watermark, která zpracovává měřenou licenci a sledování využití. +*Umístěte své klíče na bezpečné místo (proměnné prostředí, šifrovaná konfigurace atd.) před jejich použitím v kódu.* + +### Krok 2: Vytvořte instanci třídy Metered +Vytvořte objekt `Metered` s vašimi klíči. Tento objekt bude předán vodotiskovému enginu během inicializace. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Krok 3: Nastavte měřenou licenci pomocí poskytnutých klíčů +Zavolejte metodu `setLicense` (nebo ekvivalentní API volání) s vašimi veřejnými a soukromými klíči. Po nastavení budou všechny následné operace vodoznakování účtovány podle vašeho využití. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro tip:** Uchovávejte klíče mimo správu zdrojového kódu. Použijte správce tajemství nebo šifrovaný soubor s vlastnostmi, aby nedošlo k neúmyslnému odhalení. + +## Nastavení GroupDocs.Watermark pro Javu + +### Informace o instalaci + +Integrujte GroupDocs.Watermark do svého projektu pomocí Maven nebo stažením JAR souboru přímo. + +**Nastavení Maven:** +Přidejte následující konfiguraci do souboru `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Přímé stažení:** +Download the latest version from [GroupDocs.Watermark pro Java – vydání](https://releases.groupdocs.com/watermark/java/). + +### Získání licence + +Pro odemčení plné funkčnosti získáte bezplatnou zkušební verzi nebo dočasnou licenci: + +- Zaregistrujte se na [webových stránkách GroupDocs](https://purchase.groupdocs.com/temporary-license/), abyste mohli začít. +- Po získání klíčů je integrujte do svého projektu, jak je ukázáno v průvodci implementací. + +### Základní inicializace a nastavení + +Jakmile je SDK přidáno do vašeho projektu, importujte potřebné jmenné prostory a vytvořte instanci vodotiskového enginu, jak je demonstrováno v kódech výše. + +## Tipy pro řešení problémů +- **Neplatné klíče:** Zkontrolujte, že veřejný a soukromý klíč jsou přesně shodné; jediná překlep zabrání aktivaci. +- **Chyby cesty k souboru licence:** Pokud dáváte přednost souborové licenci, ujistěte se, že cesta k souboru je absolutní nebo správně rozpoznána relativně k pracovnímu adresáři. +- **Problémy se sítí:** Měřená licence vyžaduje odchozí HTTPS volání; ověřte, že váš firewall povoluje provoz na `api.groupdocs.com`. + +## Praktické aplikace +1. **Zabezpečení dokumentů:** Přidejte viditelné nebo neviditelné vodoznaky do PDF, Word dokumentů a obrázků, aby byly chráněny citlivé firemní údaje. +2. **Sledování využití:** Generujte zprávy o tom, kolik dokumentů bylo denně opatřeno vodoznakem, což je užitečné pro rozpočtování a soulad s předpisy. +3. **Integrace s CMS:** Automatizujte vkládání vodoznaků během workflow publikování obsahu, přičemž licence je automaticky vynucována. + +## Úvahy o výkonu + +**Optimalizace výkonu:** +- Aplikujte vodoznaky jen když je to nutné; přeskočte zpracování již chráněných souborů. +- Pro velké dávky znovu použijte stejnou instanci `WatermarkEngine`, abyste se vyhnuli opakovanému zatížení inicializací. + +**Nejlepší postupy:** +- Sledujte využití haldy JVM při zpracování PDF s více stovkami stránek; zvažte streamingové API, pokud se paměť stane úzkým místem. +- Povolení logování na úrovni `INFO` pro zachycení licenčních volání, aniž byste zahltili konzoli. + +## Závěr + +V tomto průvodci jsme pokryli **jak nastavit licenci** pro GroupDocs.Watermark v Javě, od instalace Maven až po konfiguraci měřeného klíče. Dodržením kroků získáte přesné sledování využití, flexibilní fakturaci a robustní ochranu dokumentů – vše bez kompromisů ve výkonu. + +**Další kroky:** +- Experimentujte s různými styly vodoznaků (text, obrázek, diagonální). +- Prozkoumejte pokročilé funkce, jako jsou podmíněné vodoznaky založené na rolích uživatelů. +- Prohlédněte si analytický dashboard GroupDocs pro sledování trendů spotřeby. + +Připraveni zabezpečit své dokumenty? Implementujte řešení ještě dnes a užívejte si klid, vědomí, že vaše aktiva jsou chráněna a náklady na licence jsou transparentní. + +## Často kladené otázky + +**Q: Jaký je rozdíl mezi dočasnou a trvalou licencí?** +A: Dočasná licence je časově omezená a ideální pro vyhodnocení, zatímco trvalá licence poskytuje neomezené používání bez opakujících se poplatků. + +**Q: Mohu přejít z měřené licence na trvalou bez změn kódu?** +A: Ano – nahraďte inicializaci měřeného klíče voláním `engine.setLicense("path/to/license/file")`. + +**Q: Co se stane, pokud je měřená služba nedostupná?** +A: SDK přejde do offline režimu; vodoznakování pokračuje, ale využití nebude hlášeno, dokud se spojení neobnoví. + +**Q: Existují omezení velikosti souboru pro vodoznakování?** +A: SDK zvládne soubory až do 1 GB; větší soubory by měly být rozděleny nebo zpracovány ve streamingovém režimu. + +**Q: Funguje měřená licence na všech operačních systémech?** +A: Funguje na jakékoli platformě, která podporuje Java 8+, včetně Windows, Linuxu a macOS. + +--- + +**Poslední aktualizace:** 2026-07-30 +**Testováno s:** GroupDocs.Watermark 24.11 for Java +**Autor:** GroupDocs + +**Zdroje** +- [Dokumentace](https://docs.groupdocs.com/watermark/java/) +- [Reference API](https://reference.groupdocs.com/watermark/java) +- [Stáhnout](https://releases.groupdocs.com/watermark/java/) +- [Repozitář na GitHubu](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Bezplatné fórum podpory](https://forum.groupdocs.com/c/watermark/10) +- [Získání dočasné licence](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Související tutoriály + +- [Tutoriály o licencování a konfiguraci GroupDocs.Watermark pro Java](/watermark/java/licensing-configuration/) +- [Jak nastavit licencování GroupDocs.Watermark v Javě: Kompletní průvodce](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Průvodce vodoznakováním v Javě: Zabezpečte dokumenty pomocí GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/czech/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/czech/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..ab0336717 --- /dev/null +++ b/content/czech/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,251 @@ +--- +date: '2026-07-30' +description: Zjistěte, jak watermark PDF v Java přidáním textového watermarku k PDF + image annotations pomocí GroupDocs.Watermark, a efektivně chránit své dokumenty. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF v Java přidáním textového watermarku k PDF image annotations + pomocí GroupDocs.Watermark. Zabezpečte své dokumenty rychle a spolehlivě. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF v Java – Přidat text k image annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF v Java – Přidat text k image annotations +type: docs +url: /cs/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Vodoznak PDF v Javě – Přidat text k anotacím obrázků + +Ochrana PDF souborů před neoprávněným šířením je pro vývojáře každodenní starostí. **Watermark PDF Java** vám umožní vložit viditelný text přímo do anotací obrázků, čímž zajistíte, že každá stránka nese vaši značku nebo upozornění na důvěrnost. V tomto tutoriálu uvidíte, proč je tento přístup spolehlivý, co potřebujete k zahájení a krok‑za‑krokem implementaci pomocí GroupDocs.Watermark pro Java. + +## Rychlé odpovědi +- **Co knihovna dělá?** Přidává, upravuje nebo odstraňuje vodoznaky v PDF, Word, Excel a souborech obrázků. +- **Která primární metoda vytváří vodoznak?** `Watermark.add()` applied to an `Annotation` object. +- **Potřebuji licenci pro vývoj?** Bezplatná zkušební verze funguje pro testování; pro produkci je vyžadována trvalá licence. +- **Mohu zpracovávat velké PDF?** Ano – API streamuje stránky, zvládá soubory > 500 MB bez načítání celého dokumentu do paměti. +- **Je řešení thread‑safe?** Všechny veřejné metody jsou bezstavu, takže můžete bezpečně spouštět více instancí paralelně. + +## Co je watermark pdf java? +`watermark pdf java` odkazuje na schopnost přidávat vizuální vodoznaky do PDF dokumentů z Java kódu, obvykle pomocí knihovny jako je GroupDocs.Watermark. Pomáhá vynucovat vlastnictví, důvěrnost nebo značku přímo v souboru při zachování původního rozvržení a umožňuje jemnou kontrolu nad vzhledem a umístěním. + +## Proč použít GroupDocs.Watermark pro Java? +GroupDocs.Watermark podporuje **50+ input and output formats**, zpracovává PDF s více stovkami stránek za méně než 2 sekundy na standardním hardwaru a nevyžaduje instalaci plnohodnotného PDF prohlížeče. Jeho engine, který rozumí anotacím, zachovává původní rozvržení při vkládání textových vodoznaků s nastavitelnou neprůhledností, rotací a stylizací písma, což z něj činí rychlou, spolehlivou volbu pro enterprise‑grade vodoznakování. + +## Předpoklady +- **Java Development Kit (JDK)** 8 nebo vyšší. +- **Maven** (nebo ruční zahrnutí JAR) pro správu závislostí. +- Základní znalost struktury PDF a konceptů programování v Javě. + +## Jaké jsou předpoklady pro vodoznakování PDF v Javě? +Potřebujete kompatibilní JDK, Maven (nebo JAR soubory) a platnou licenci GroupDocs.Watermark. Knihovna běží na libovolném OS, který podporuje Java 8+, a funguje s Java 11, 17 a novějšími LTS verzemi. Dále zajistěte, aby váš projekt měl dostatek heap paměti (alespoň 2 GB) pro zpracování velkých PDF a aby měl zápisová oprávnění do výstupního adresáře. + +## Nastavení GroupDocs.Watermark pro Java +Než napíšete jakýkoli kód, přidejte knihovnu do svého projektu. + +### Nastavení Maven +Add the following to your `pom.xml` file: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Přímé stažení +Alternatively, download the latest version from [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Získání licence +- **Free Trial** – explore core features without charge. +- **Temporary License** – unlock full capabilities during development. +- **Purchase** – obtain a permanent license for production use and premium support. + +### Základní inicializace +`Watermark` is the entry point class that loads a document, applies watermark objects, and saves the result. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Jak přidat textový vodoznak k anotacím obrázků PDF pomocí GroupDocs.Watermark pro Java? +`Watermark.load()` loads a PDF document into the Watermark API for processing. `TextWatermark` represents a textual watermark with customizable font, size, color, opacity, and rotation. `ImageAnnotation` is a PDF annotation that contains an embedded image, which can be targeted for watermarking. `annotation.addWatermark()` attaches the created watermark to the annotation, and `watermark.save()` writes the modified document to the specified path. + +Load your PDF with `Watermark.load("sample.pdf")`, create a `TextWatermark` instance, iterate over each `ImageAnnotation`, and call `annotation.addWatermark(textWatermark)`. Finally, save the modified document with `watermark.save("output.pdf")`. This concise flow handles any number of annotations in a single pass and preserves original annotation metadata. + +### Přidání textového vodoznaku k anotacím obrázků PDF +The following sections break down each step. + +#### Krok 1: Načtení PDF dokumentu +Open the target PDF file so the API can inspect its annotation objects. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Krok 2: Vytvoření textového vodoznaku +`TextWatermark` represents a textual watermark with customizable font, size, color, opacity, and rotation. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Krok 3: Aplikace vodoznaku na anotace +`ImageAnnotation` is a PDF annotation that contains an embedded image, which can be targeted for watermarking. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Krok 4: Uložení vodoznakovaného PDF +`watermark.save()` writes the modified document to the specified path. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Časté problémy a řešení +- **Missing Dependencies** – Verify that all GroupDocs artifacts are listed in `pom.xml`. +- **File Path Issues** – Use absolute paths or `Paths.get()` to avoid relative‑path surprises. +- **Unsupported Annotation Types** – The API currently handles `ImageAnnotation`, `TextAnnotation`, and `StampAnnotation`; other types require custom handling. + +## Praktické aplikace +Adding a text watermark to PDF image annotations is especially useful for: +1. **Legal Documents** – Mark contracts with “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Prevent accidental leaks by embedding a company‑wide label. +3. **Marketing Materials** – Brand promotional PDFs with a subtle logo‑text overlay. +4. **Academic Drafts** – Indicate “Draft – Do Not Distribute” on research papers before peer review. + +## Úvahy o výkonu +- **Batch Processing** – Group multiple PDFs into a single thread pool to minimise JVM overhead. +- **Memory Management** – The library streams pages, so allocate at least 2 GB heap for files larger than 200 MB. +- **Watermark Settings** – Lower opacity (e.g., 30 %) reduces visual clutter while still being detectable. + +## Často kladené otázky + +**Q: Can I add watermarks to other annotation types?** +A: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation objects by using the same `addWatermark` method. + +**Q: Is there a limit to how many watermarks I can place on a page?** +A: No hard limit, but keep the total opacity below 70 % to maintain readability and avoid performance degradation. + +**Q: How do I remove a watermark after it’s been applied?** +A: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` to strip every watermark from the document. + +**Q: Does the library handle password‑protected PDFs?** +A: Yes – provide the password when loading the document: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: What is the maximum file size supported?** +A: The API can process files up to 2 GB on a 64‑bit JVM; larger files should be split into sections before watermarking. + +## Zdroje +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Poslední aktualizace:** 2026-07-30 +**Testováno s:** GroupDocs.Watermark 23.9 for Java +**Autor:** GroupDocs + +## Související tutoriály + +- [Jak přidat textový vodoznak do PDF pomocí GroupDocs.Watermark pro Java (průvodce 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Jak přidat textové a obrázkové vodoznaky na konkrétní stránky PDF pomocí GroupDocs.Watermark pro Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Přístup a iterace přes PDF artefakty pomocí GroupDocs.Watermark v Javě pro vodoznakování dokumentů](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/dutch/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/dutch/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..575bcb49b --- /dev/null +++ b/content/dutch/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Leer hoe u de license voor GroupDocs.Watermark in Java instelt, uw documenten + effectief beschermt en het gebruik efficiënt beheert. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Hoe de license voor GroupDocs.Watermark in Java in te stellen. Deze + gids leidt u door het installeren van de SDK, het verkrijgen van een metered key, + en het configureren van de license om uw documenten te beveiligen. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Hoe de license voor GroupDocs Watermark in Java instellen +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Hoe de license voor GroupDocs Watermark in Java instellen +type: docs +url: /nl/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Hoe licentie instellen voor GroupDocs Watermark in Java + +Het beschermen van intellectueel eigendom is een topprioriteit voor moderne applicaties, en watermerken zijn een bewezen manier om ongeautoriseerde distributie te ontmoedigen. Als je **GroupDocs.Watermark for Java** gebruikt, heb je een licentie nodig die het gebruik kan bijhouden en kan schalen met de vraag. Deze tutorial legt **uit hoe je een licentie instelt** voor GroupDocs.Watermark in Java, van het installeren van de SDK tot het configureren van een metered‑sleutel die het verbruik terugrapporteert aan de service. + +## Snelle antwoorden +- **Wat is een metered‑licentie?** Het is een gebruiksgebaseerde licentie die elke API‑aanroep registreert, waardoor je alleen betaalt voor wat je verbruikt. +- **Heb ik eerst een proefversie nodig?** Ja, je kunt een tijdelijke licentie aanvragen op de GroupDocs‑site om het product te evalueren. +- **Welke Java‑versie is vereist?** Java 8 of nieuwer; de SDK is gecompileerd voor JDK 8+. +- **Kan ik later overschakelen naar een permanente licentie?** Absoluut – vervang gewoon de metered‑sleutels door een permanent licentiebestand. +- **Is de installatie compatibel met Maven?** Ja, de Maven‑coördinaten worden geleverd voor naadloos afhankelijkheidsbeheer. + +## Wat is een metered‑licentie voor GroupDocs Watermark? +Een metered‑licentie is een cloud‑enabled recht dat door GroupDocs wordt geleverd en elke watermerk‑operatie die door de SDK wordt uitgevoerd registreert. Elke API‑aanroep wordt gelogd op de licentieserver van GroupDocs, waardoor pay‑as‑you‑go‑facturering op basis van daadwerkelijk gebruik mogelijk is. Dit model geeft ontwikkelaars realtime inzicht in het verbruik en helpt kosten te beheersen terwijl volledige functionaliteit behouden blijft. + +## Waarom een metered‑licentie gebruiken met GroupDocs Watermark? +GroupDocs.Watermark ondersteunt meer dan vijftig invoer‑ en uitvoerformaten — waaronder PDF, DOCX, PPTX en diverse beeldformaten — en kan bestanden tot 1 GB verwerken zonder het volledige document in het geheugen te laden, wat de prestaties behoudt. Door een metered‑licentie te gebruiken betaal je alleen voor de bewerkingen die je daadwerkelijk uitvoert, waardoor de oplossing kosteneffectief kan schalen terwijl volledige toegang tot alle functies behouden blijft. + +## Voorvereisten +- **GroupDocs.Watermark for Java** versie 24.11 of later. +- Een Java Development Kit (JDK) 8 of nieuwer geïnstalleerd en geconfigureerd. +- Basiskennis van Maven of handmatig JAR‑beheer. +- Een tijdelijke of permanente licentiesleutel van het GroupDocs‑portaal. + +## Hoe een metered‑licentie instellen voor GroupDocs Watermark in Java? +Laad je openbare en privé‑sleutels, maak een `Metered`‑instantie aan en pas de licentie toe — alles in drie beknopte stappen. Deze aanpak garandeert dat elk watermerk‑verzoek wordt geteld tegen je account, waardoor je volledige zichtbaarheid krijgt op het verbruik. + +### Stap 1: Definieer de openbare en privé‑sleutels +Voer de sleutels in die je hebt ontvangen na registratie voor een tijdelijke licentie. + +`Metered` is de GroupDocs.Watermark‑klasse die metered‑licenties en gebruiksregistratie afhandelt. +*Plaats je sleutels op een veilige locatie (omgevingsvariabelen, versleutelde configuratie, enz.) voordat je ze in code gebruikt.* + +### Stap 2: Maak een instantie van de Metered‑klasse +Instantieer het `Metered`‑object met je sleutels. Dit object wordt tijdens de initialisatie doorgegeven aan de watermerk‑engine. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Stap 3: Stel de metered‑licentie in met de geleverde sleutels +Roep de `setLicense`‑methode (of de equivalente API‑aanroep) aan met je openbare en privé‑sleutels. Zodra ingesteld, worden alle volgende watermerk‑bewerkingen gefactureerd volgens je gebruik. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro tip:** Houd de sleutels buiten versiebeheer. Gebruik een geheimen‑manager of een versleuteld properties‑bestand om accidentele blootstelling te voorkomen. + +## GroupDocs.Watermark voor Java instellen + +### Installatie‑informatie + +Integreer GroupDocs.Watermark in je project met Maven of door de JAR direct te downloaden. + +**Maven‑configuratie:** +Voeg de volgende configuratie toe in je `pom.xml`‑bestand: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Directe download:** +Download de nieuwste versie van [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Licentie‑acquisitie + +Om volledige functionaliteit te ontgrendelen, verkrijg een gratis proefversie of tijdelijke licentie: + +- Meld je aan op de [GroupDocs‑website](https://purchase.groupdocs.com/temporary-license/) om te beginnen. +- Na het verkrijgen van je sleutels, integreer ze in je project zoals weergegeven in de implementatie‑gids. + +### Basisinitialisatie en -configuratie + +Zodra de SDK aan je project is toegevoegd, importeer je de benodigde namespaces en maak je de watermerk‑engine‑instantie aan zoals gedemonstreerd in de bovenstaande code‑fragmenten. + +## Tips voor probleemoplossing +- **Ongeldige sleutels:** Controleer dubbel of de openbare en privé‑sleutels exact overeenkomen; één typefout voorkomt activering. +- **Licentiebestand‑pad fouten:** Als je een bestand‑gebaseerde licentie verkiest, zorg dan dat het pad absoluut is of correct wordt opgelost ten opzichte van de werkmap. +- **Netwerkproblemen:** Metered‑licenties vereisen uitgaande HTTPS‑aanroepen; controleer of je firewall verkeer naar `api.groupdocs.com` toestaat. + +## Praktische toepassingen +1. **Documentbeveiliging:** Voeg zichtbare of onzichtbare watermerken toe aan PDF‑s, Word‑documenten en afbeeldingen om gevoelige bedrijfsgegevens te beschermen. +2. **Gebruikstracering:** Genereer rapporten over hoeveel documenten per dag zijn voorzien van een watermerk, nuttig voor budgettering en naleving. +3. **CMS‑integratie:** Automatiseer het invoegen van watermerken tijdens content‑publicatie‑workflows, met licentie‑handhaving automatisch. + +## Prestatie‑overwegingen + +**Prestaties optimaliseren:** +- Pas watermerken alleen toe wanneer nodig; sla verwerking over voor reeds beveiligde bestanden. +- Voor grote batches, hergebruik dezelfde `WatermarkEngine`‑instantie om herhaalde initialisatie‑overhead te vermijden. + +**Best practices:** +- Houd het JVM‑heap‑gebruik in de gaten bij het verwerken van PDF‑bestanden met honderden pagina's; overweeg streaming‑API's als geheugen een knelpunt wordt. +- Schakel logging in op `INFO`‑niveau om licentie‑aanroepen vast te leggen zonder de console te overweldigen. + +## Conclusie + +In deze gids hebben we **uitgelegd hoe je een licentie instelt** voor GroupDocs.Watermark in Java, van Maven‑installatie tot metered‑sleutelconfiguratie. Door de stappen te volgen, krijg je nauwkeurige gebruikstracering, flexibele facturering en robuuste documentbeveiliging — allemaal zonder concessies te doen aan de prestaties. + +**Volgende stappen:** +- Experimenteer met verschillende watermerkstijlen (tekst, afbeelding, diagonaal). +- Verken geavanceerde functies zoals conditionele watermerken op basis van gebruikersrollen. +- Bekijk het GroupDocs‑analytics‑dashboard om consumptietrends te monitoren. + +Klaar om je documenten te beveiligen? Implementeer de oplossing vandaag nog en geniet van gemoedsrust, wetende dat je assets beschermd zijn en je licentiekosten transparant zijn. + +## Veelgestelde vragen + +**V: Wat is het verschil tussen een tijdelijke en een permanente licentie?** +A: Een tijdelijke licentie is tijd‑beperkt en ideaal voor evaluatie, terwijl een permanente licentie onbeperkt gebruik biedt zonder terugkerende kosten. + +**V: Kan ik van een metered‑licentie naar een permanente licentie overschakelen zonder code‑wijzigingen?** +A: Ja — vervang de metered‑sleutelinitialisatie door een aanroep van `engine.setLicense("path/to/license/file")`. + +**V: Wat gebeurt er als de metered‑service onbereikbaar is?** +A: De SDK schakelt over naar offline‑modus; watermerken gaat door, maar het gebruik wordt niet gerapporteerd totdat de connectiviteit is hersteld. + +**V: Zijn er bestandsgrootte‑limieten voor watermerken?** +A: De SDK kan bestanden tot 1 GB aan, grotere bestanden moeten worden gesplitst of in streaming‑modus worden verwerkt. + +**V: Werkt de metered‑licentie op alle besturingssystemen?** +A: Het werkt op elk platform dat Java 8+ ondersteunt, inclusief Windows, Linux en macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Resources** + +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Gerelateerde tutorials + +- [GroupDocs.Watermark voor Java licentie‑ en configuratietutorials](/watermark/java/licensing-configuration/) +- [Hoe GroupDocs.Watermark licenties in Java in te stellen: Een volledige gids](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java watermerk‑gids: Documenten beveiligen met GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/dutch/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/dutch/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..c666de2aa --- /dev/null +++ b/content/dutch/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,252 @@ +--- +date: '2026-07-30' +description: Leer hoe u PDF in Java kunt watermerken door een text watermark toe te + voegen aan PDF image annotations met GroupDocs.Watermark, en bescherm uw documenten + effectief. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF in Java door een text watermark toe te voegen aan PDF + image annotations met GroupDocs.Watermark. Bescherm uw documenten snel en betrouwbaar. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF in Java – Voeg tekst toe aan afbeeldingannotaties +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF in Java – Voeg tekst toe aan afbeeldingannotaties +type: docs +url: /nl/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Watermark PDF in Java – Tekst toevoegen aan afbeeldingannotaties + +Het beschermen van PDF‑bestanden tegen ongeautoriseerde distributie is een dagelijkse zorg voor ontwikkelaars. **Watermark PDF Java** stelt je in staat zichtbare tekst direct op afbeeldingannotaties te plaatsen, zodat elke pagina je branding of vertrouwelijkheidsmelding bevat. In deze tutorial zie je waarom deze aanpak betrouwbaar is, wat je nodig hebt om te beginnen, en een stapsgewijze implementatie met GroupDocs.Watermark voor Java. + +## Snelle antwoorden +- **Wat doet de bibliotheek?** Het voegt watermerken toe, bewerkt ze of verwijdert ze op PDF's, Word, Excel en afbeeldingsbestanden. +- **Welke primaire methode maakt het watermerk?** `Watermark.add()` toegepast op een `Annotation` object. +- **Heb ik een licentie nodig voor ontwikkeling?** Een gratis proefversie werkt voor testen; een permanente licentie is vereist voor productie. +- **Kan ik grote PDF's verwerken?** Ja – de API streamt pagina's, verwerkt bestanden > 500 MB zonder het volledige document in het geheugen te laden. +- **Is de oplossing thread‑safe?** Alle openbare methoden zijn stateless, dus je kunt veilig meerdere instanties parallel uitvoeren. + +## Wat is watermark pdf java? +`watermark pdf java` verwijst naar de mogelijkheid om visuele watermerken toe te voegen aan PDF‑documenten vanuit Java‑code, meestal met een bibliotheek zoals GroupDocs.Watermark. Het helpt eigendom, vertrouwelijkheid of branding direct in het bestand af te dwingen, terwijl de oorspronkelijke lay-out behouden blijft en fijnmazige controle over uiterlijk en plaatsing mogelijk is. + +## Waarom GroupDocs.Watermark voor Java gebruiken? +GroupDocs.Watermark ondersteunt **meer dan 50 invoer‑ en uitvoerformaten**, verwerkt PDF's met honderden pagina's in minder dan 2 seconden op standaard hardware, en vereist geen volledige PDF‑viewer. Zijn annotatie‑bewuste engine behoudt de oorspronkelijke lay-out terwijl tekstwatermerken met verstelbare dekking, rotatie en lettertype‑styling worden ingevoegd, waardoor het een snelle, betrouwbare keuze is voor enterprise‑grade watermerken. + +## Vereisten +- **Java Development Kit (JDK)** 8 of hoger. +- **Maven** (of handmatige JAR‑inclusie) voor afhankelijkheidsbeheer. +- Basiskennis van PDF‑structuur en Java‑programmeervoorconcepten. + +## Wat zijn de vereisten voor het watermerken van PDF's in Java? +Je hebt een compatibele JDK, Maven (of de JAR‑bestanden) en een geldige GroupDocs.Watermark‑licentie nodig. De bibliotheek draait op elk OS dat Java 8+ ondersteunt, en werkt met Java 11, 17 en nieuwere LTS‑releases. Zorg er bovendien voor dat je project voldoende heap‑geheugen heeft (minstens 2 GB) voor het verwerken van grote PDF's en dat je schrijfrechten hebt op de uitvoermap. + +## GroupDocs.Watermark voor Java instellen +Voordat je code schrijft, voeg je de bibliotheek toe aan je project. + +### Maven‑configuratie +Add the following to your `pom.xml` file: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Directe download +Download anders de nieuwste versie van [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Licentie‑acquisitie +- **Free Trial** – verken de kernfuncties zonder kosten. +- **Temporary License** – ontgrendel volledige mogelijkheden tijdens ontwikkeling. +- **Purchase** – verkrijg een permanente licentie voor productiegebruik en premium‑ondersteuning. + +### Basisinitialisatie +`Watermark` is the entry point class that loads a document, applies watermark objects, and saves the result. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Hoe een tekstwatermerk toe te voegen aan PDF‑afbeeldingsannotaties met GroupDocs.Watermark voor Java? +`Watermark.load()` laadt een PDF‑document in de Watermark‑API voor verwerking. `TextWatermark` vertegenwoordigt een tekstueel watermerk met aanpasbaar lettertype, grootte, kleur, dekking en rotatie. `ImageAnnotation` is een PDF‑annotatie die een ingebedde afbeelding bevat, die kan worden getarget voor watermerken. `annotation.addWatermark()` voegt het gemaakte watermerk toe aan de annotatie, en `watermark.save()` schrijft het gewijzigde document naar het opgegeven pad. + +Laad je PDF met `Watermark.load("sample.pdf")`, maak een `TextWatermark`‑instantie, doorloop elke `ImageAnnotation` en roep `annotation.addWatermark(textWatermark)` aan. Sla tenslotte het gewijzigde document op met `watermark.save("output.pdf")`. Deze beknopte flow verwerkt een willekeurig aantal annotaties in één enkele doorgang en behoudt de oorspronkelijke annotatiemetadata. + +### Een tekstwatermerk toevoegen aan PDF‑afbeeldingsannotaties +De volgende secties splitsen elke stap op. + +#### Stap 1: PDF‑document laden +Open the target PDF file so the API can inspect its annotation objects. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Stap 2: Het tekstwatermerk maken +`TextWatermark` represents a textual watermark with customizable font, size, color, opacity, and rotation. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Stap 3: Het watermerk toepassen op annotaties +`ImageAnnotation` is a PDF annotation that contains an embedded image, which can be targeted for watermarking. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Stap 4: Het watermerk‑PDF opslaan +`watermark.save()` writes the modified document to the specified path. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Veelvoorkomende problemen en oplossingen +- **Missing Dependencies** – Controleer of alle GroupDocs‑artefacten in `pom.xml` staan vermeld. +- **File Path Issues** – Gebruik absolute paden of `Paths.get()` om verrassingen met relatieve paden te voorkomen. +- **Unsupported Annotation Types** – De API ondersteunt momenteel `ImageAnnotation`, `TextAnnotation` en `StampAnnotation`; andere types vereisen aangepaste handling. + +## Praktische toepassingen +Het toevoegen van een tekstwatermerk aan PDF‑afbeeldingsannotaties is vooral nuttig voor: +1. **Juridische documenten** – Markeer contracten met “Confidential – For Internal Use Only”. +2. **Vertrouwelijke rapporten** – Voorkom accidentele lekken door een bedrijfsbreed label in te sluiten. +3. **Marketingmateriaal** – Merk promotionele PDF's met een subtiele logo‑tekst overlay. +4. **Academische concepten** – Geef “Draft – Do Not Distribute” aan op onderzoekspapers vóór peer review. + +## Prestatie‑overwegingen +- **Batch Processing** – Groepeer meerdere PDF's in één thread‑pool om JVM‑overhead te minimaliseren. +- **Memory Management** – De bibliotheek streamt pagina's, dus wijs minstens 2 GB heap toe voor bestanden groter dan 200 MB. +- **Watermark Settings** – Een lagere dekking (bijv. 30 %) vermindert visuele rommel terwijl het nog steeds detecteerbaar blijft. + +## Veelgestelde vragen + +**Q: Kan ik watermerken toevoegen aan andere annotatietypen?** +A: Ja, je kunt `TextAnnotation`, `StampAnnotation` of aangepaste annotatie‑objecten targeten door dezelfde `addWatermark`‑methode te gebruiken. + +**Q: Is er een limiet aan hoeveel watermerken ik op een pagina kan plaatsen?** +A: Geen harde limiet, maar houd de totale dekking onder 70 % om leesbaarheid te behouden en prestatie‑degradatie te vermijden. + +**Q: Hoe verwijder ik een watermerk nadat het is toegepast?** +A: Gebruik `annotation.removeWatermark(watermarkId)` of roep `Watermark.removeAll()` aan om elk watermerk uit het document te verwijderen. + +**Q: Ondersteunt de bibliotheek wachtwoord‑beveiligde PDF's?** +A: Ja – geef het wachtwoord op bij het laden van het document: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Wat is de maximale ondersteunde bestandsgrootte?** +A: De API kan bestanden tot 2 GB verwerken op een 64‑bit JVM; grotere bestanden moeten vóór het watermerken in secties worden gesplitst. + +## Bronnen +- [GroupDocs.Watermark Documentatie](https://docs.groupdocs.com/watermark/java/) +- [API Referentie](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark voor Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Gratis ondersteuningsforum](https://forum.groupdocs.com/c/watermark/10) +- [Aanvraag tijdelijke licentie](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Laatst bijgewerkt:** 2026-07-30 +**Getest met:** GroupDocs.Watermark 23.9 for Java +**Auteur:** GroupDocs + +## Gerelateerde tutorials + +- [Hoe een tekstwatermerk toe te voegen aan PDF met GroupDocs.Watermark voor Java (2023 gids)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Hoe tekst- en afbeeldingwatermerken toe te voegen aan specifieke PDF‑pagina's met GroupDocs.Watermark voor Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Toegang en iteratie over PDF‑artefacten met GroupDocs.Watermark in Java voor documentwatermerken](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/english/java/advanced-features/groupdocs-watermark-java-document-previews/_index.md b/content/english/java/advanced-features/groupdocs-watermark-java-document-previews/_index.md index 8f1500cde..896a67b1f 100644 --- a/content/english/java/advanced-features/groupdocs-watermark-java-document-previews/_index.md +++ b/content/english/java/advanced-features/groupdocs-watermark-java-document-previews/_index.md @@ -1,5 +1,5 @@ --- -title: "Generate Document Previews Using GroupDocs.Watermark in Java: Advanced Guide" +title: "Generate Document Previews Using GroupDocs.Watermark in Java - Advanced Guide" description: "Learn to generate document previews with GroupDocs.Watermark for Java. Streamline your workflow by efficiently handling large volumes of documents." date: "2025-05-15" weight: 1 diff --git a/content/english/java/advanced-features/groupdocs-watermark-java-tutorial/_index.md b/content/english/java/advanced-features/groupdocs-watermark-java-tutorial/_index.md index 157b742a3..0421cbb73 100644 --- a/content/english/java/advanced-features/groupdocs-watermark-java-tutorial/_index.md +++ b/content/english/java/advanced-features/groupdocs-watermark-java-tutorial/_index.md @@ -1,5 +1,5 @@ --- -title: "Master GroupDocs.Watermark in Java: A Comprehensive Guide for Document Protection" +title: "Master GroupDocs.Watermark in Java - A Comprehensive Guide for Document Protection" description: "Learn how to integrate GroupDocs.Watermark into your Java applications. Secure documents and images with text and image watermarks." date: "2025-05-15" weight: 1 diff --git a/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md index 29c8a3af2..649b096e1 100644 --- a/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md +++ b/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -1,46 +1,218 @@ --- -title: "How to Set a Metered License for GroupDocs Watermark in Java" -description: "Learn how to set up a metered license with GroupDocs.Watermark for Java. Protect your documents effectively and manage usage efficiently." -date: "2025-05-16" -weight: 1 -url: "/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/" +date: '2026-07-30' +description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. +images: +- /java/licensing-configuration/set-metered-license-groupdocs-watermark-java/og-image.png keywords: -- metered license GroupDocs Watermark Java -- GroupDocs.Watermark setup Java -- Java document security watermarks +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: How to set license for GroupDocs.Watermark in Java. This guide walks + you through installing the SDK, acquiring a metered key, and configuring the license + to secure your documents. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: How to Set License for GroupDocs Watermark in Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: How to Set License for GroupDocs Watermark in Java type: docs +url: /java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 --- -# How to Set a Metered License for GroupDocs Watermark in Java -## Introduction +# How to Set License for GroupDocs Watermark in Java + +Protecting intellectual property is a top priority for modern applications, and watermarks are a proven way to deter unauthorized distribution. If you’re using **GroupDocs.Watermark for Java**, you’ll need a license that can track usage and scale with demand. This tutorial explains **how to set license** for GroupDocs.Watermark in Java, from installing the SDK to configuring a metered key that reports consumption back to the service. -In today's digital world, protecting intellectual property is crucial, and watermarks provide an effective solution. Managing licenses can be challenging with metered services that track usage. This guide shows you how to seamlessly set up a metered license with GroupDocs.Watermark for Java. +## Quick Answers +- **What is a metered license?** It’s a usage‑based license that records each API call, allowing you to pay only for what you consume. +- **Do I need a trial first?** Yes, you can request a temporary license from the GroupDocs site to evaluate the product. +- **Which Java version is required?** Java 8 or newer; the SDK is compiled for JDK 8+. +- **Can I switch to a perpetual license later?** Absolutely – just replace the metered keys with a permanent license file. +- **Is the setup compatible with Maven?** Yes, the Maven coordinates are provided for seamless dependency management. -**What You'll Learn:** -- Implementing a metered license using GroupDocs.Watermark. -- Step-by-step setup of the environment and dependencies. -- Real-world applications of setting a metered license. -- Performance optimization tips when working with GroupDocs.Watermark. +## What is a metered license for GroupDocs Watermark? +A metered license is a cloud‑enabled entitlement provided by GroupDocs that records each watermarking operation performed by the SDK. Each API call is logged on GroupDocs’ licensing server, allowing pay‑as‑you‑go billing based on actual usage. This model gives developers real‑time insight into consumption and helps control costs while ensuring full feature access. -Let's begin by reviewing the prerequisites for this tutorial. +## Why use a metered license with GroupDocs Watermark? +GroupDocs.Watermark supports more than fifty input and output formats—including PDF, DOCX, PPTX, and various image types—and can process files up to 1 GB without loading the whole document into memory, which preserves performance. By using a metered license you only pay for the operations you actually run, allowing the solution to scale cost‑effectively while retaining full access to all features. ## Prerequisites +- **GroupDocs.Watermark for Java** version 24.11 or later. +- A Java Development Kit (JDK) 8 or newer installed and configured. +- Basic familiarity with Maven or manual JAR management. +- A temporary or permanent license key from the GroupDocs portal. + +## How to set a metered license for GroupDocs Watermark in Java? + +Load your public and private keys, create a `Metered` instance, and apply the license—all in three concise steps. This approach guarantees that every watermarking request is counted against your account, giving you full visibility into consumption. + +### Step 1: Define the public and private keys +Enter the keys you received after registering for a temporary license. + +`Metered` is the GroupDocs.Watermark class that handles metered licensing and usage tracking. +*Place your keys in a secure location (environment variables, encrypted config, etc.) before using them in code.* + +### Step 2: Create an instance of the Metered class +Instantiate the `Metered` object with your keys. This object will be passed to the watermark engine during initialization. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Step 3: Set the metered license using the provided keys +Call the `setLicense` method (or the equivalent API call) with your public and private keys. Once set, all subsequent watermark operations will be billed according to your usage. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` -Before starting, ensure you have: -1. **Required Libraries:** Install GroupDocs.Watermark for Java version 24.11 or higher. -2. **Environment Setup Requirements:** Java Development Kit (JDK) installed and configured on your machine. -3. **Knowledge Prerequisites:** Basic understanding of Java programming. +> **Pro tip:** Keep the keys out of source control. Use a secrets manager or encrypted properties file to avoid accidental exposure. ## Setting Up GroupDocs.Watermark for Java ### Installation Information -Integrate GroupDocs.Watermark into your project using Maven or direct download: - -**Maven Setup:** +Integrate GroupDocs.Watermark into your project using Maven or by downloading the JAR directly. +**Maven Setup:** Add the following configuration in your `pom.xml` file: +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Direct Download:** +Download the latest version from [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### License Acquisition + +To unlock full functionality, obtain a free trial or temporary license: + +- Sign up on the [GroupDocs website](https://purchase.groupdocs.com/temporary-license/) to get started. +- After acquiring your keys, integrate them into your project as shown in the implementation guide. + +### Basic Initialization and Setup + +Once the SDK is added to your project, import the necessary namespaces and create the watermark engine instance as demonstrated in the code snippets above. + +## Troubleshooting Tips +- **Invalid keys:** Double‑check that the public and private keys match exactly; a single typo will prevent activation. +- **License file path errors:** If you prefer a file‑based license, ensure the file path is absolute or correctly resolved relative to the working directory. +- **Network issues:** Metered licensing requires outbound HTTPS calls; verify that your firewall allows traffic to `api.groupdocs.com`. + +## Practical Applications +1. **Document Security:** Add visible or invisible watermarks to PDFs, Word documents, and images to protect sensitive corporate data. +2. **Usage Tracking:** Generate reports on how many documents have been watermarked per day, useful for budgeting and compliance. +3. **CMS Integration:** Automate watermark insertion during content publishing workflows, with licensing automatically enforced. + +## Performance Considerations + +**Optimizing Performance:** +- Apply watermarks only when necessary; skip processing for already‑protected files. +- For large batches, reuse the same `WatermarkEngine` instance to avoid repeated initialization overhead. + +**Best Practices:** +- Monitor JVM heap usage when processing multi‑hundred‑page PDFs; consider streaming APIs if memory becomes a bottleneck. +- Enable logging at the `INFO` level to capture licensing calls without overwhelming the console. + +## Conclusion + +In this guide we covered **how to set license** for GroupDocs.Watermark in Java, from Maven installation to metered key configuration. By following the steps, you gain precise usage tracking, flexible billing, and robust document protection—all without compromising performance. + +**Next Steps:** +- Experiment with different watermark styles (text, image, diagonal). +- Explore advanced features such as conditional watermarks based on user roles. +- Review the GroupDocs analytics dashboard to monitor consumption trends. + +Ready to secure your documents? Implement the solution today and enjoy peace of mind knowing your assets are protected and your licensing costs are transparent. + +## Frequently Asked Questions + +**Q: What is the difference between a temporary and a perpetual license?** +A: A temporary license is time‑limited and ideal for evaluation, while a perpetual license provides unlimited use without recurring fees. + +**Q: Can I switch from a metered license to a perpetual one without code changes?** +A: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + +**Q: What happens if the metered service is unreachable?** +A: The SDK falls back to offline mode; watermarking continues but usage won’t be reported until connectivity is restored. + +**Q: Are there file‑size limits for watermarking?** +A: The SDK can handle files up to 1 GB; larger files should be split or processed in streaming mode. + +**Q: Does the metered license work on all operating systems?** +A: It works on any platform that supports Java 8+, including Windows, Linux, and macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Resources** + +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + ```xml @@ -59,20 +231,6 @@ Add the following configuration in your `pom.xml` file: ``` -**Direct Download:** - -Download the latest version from [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). - -### License Acquisition - -To access GroupDocs.Watermark's full capabilities, acquire a free trial or temporary license: -- Sign up on the [GroupDocs website](https://purchase.groupdocs.com/temporary-license/) to get started. -- After acquiring your keys, integrate them into your project as shown below. - -### Basic Initialization and Setup - -Once installed, initialize GroupDocs.Watermark in your Java application: - ```java import com.groupdocs.watermark.License; @@ -85,94 +243,24 @@ public class InitializeWatermark { } ``` -## Implementation Guide - -### Setting a Metered License - -**Overview:** -This feature allows you to set up a metered license for GroupDocs.Watermark, enabling usage tracking and control. - -#### Step 1: Define the Public and Private Keys - -Firstly, use your public and private keys provided upon acquiring your metered license: - ```java // Step 1: Define the public and private keys for the metered license. String publicKey = "*****"; // Replace with your actual public key String privateKey = "*****"; // Replace with your actual private key ``` -**Why?** -These keys authenticate your application's access to GroupDocs.Watermark services, ensuring secure usage tracking. - -#### Step 2: Create an Instance of the Metered Class - ```java // Step 2: Create an instance of Metered class. Metered metered = new Metered(); ``` -The `Metered` class manages your application's licensing status and tracks usage. - -#### Step 3: Set the Metered License Using Provided Keys - -Finally, set up your license with the keys you obtained: ```java // Step 3: Set the metered license using the provided keys. metered.setMeteredKey(publicKey, privateKey); ``` -**Why?** -This step is crucial for enabling metered licensing, allowing you to monitor and control how your application uses GroupDocs.Watermark. - -### Troubleshooting Tips - -- Ensure that your public and private keys are correct. Any typo will result in failed authentication. -- If experiencing issues with license activation, double-check the path to your license file during initialization. - -## Practical Applications - -1. **Document Security:** Embed watermarks in PDFs for added security in corporate environments. -2. **Usage Tracking:** Monitor how often specific documents are processed using GroupDocs.Watermark services. -3. **Integration:** Seamlessly integrate with CMS platforms to automate watermarking and licensing management. - -## Performance Considerations - -**Optimizing Performance:** -- Minimize resource usage by only applying watermarks when necessary. -- Use efficient data structures for handling large documents. - -**Best Practices:** -- Regularly monitor memory usage within your Java application, especially when dealing with extensive document processing tasks. - -## Conclusion -In this tutorial, we covered how to set up and implement a metered license using GroupDocs.Watermark for Java. By following the steps outlined, you can effectively manage your licensing needs while utilizing watermarks in various applications. - -**Next Steps:** -- Experiment with different watermark styles and configurations. -- Explore additional features offered by GroupDocs.Watermark. - -Ready to try it out? Implement this solution today to enhance document security and management! - -## FAQ Section - -1. **What is a metered license, and why should I use it?** - - A metered license allows you to track usage of the software, helping manage costs effectively. -2. **Can I switch between free and metered licenses easily?** - - Yes, GroupDocs provides straightforward methods for transitioning between different licensing options. -3. **What happens if my keys are incorrect?** - - The application will not authenticate properly, preventing access to premium features. -4. **How do I troubleshoot common issues with setting the license?** - - Verify your key entries and ensure your environment is correctly configured. -5. **Are there any limitations when using a metered license?** - - Usage limits depend on your specific licensing agreement; always check terms provided by GroupDocs. - -## Resources - -- [Documentation](https://docs.groupdocs.com/watermark/java/) -- [API Reference](https://reference.groupdocs.com/watermark/java) -- [Download](https://releases.groupdocs.com/watermark/java/) -- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) -- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) -- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) +## Related Tutorials +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/og-image.png b/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/og-image.png new file mode 100644 index 000000000..0f6b824af Binary files /dev/null and b/content/english/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/og-image.png differ diff --git a/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md index c0af1cd2c..5d579f1a0 100644 --- a/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md +++ b/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -1,35 +1,97 @@ --- -title: "How to Add a Text Watermark to PDF Image Annotations Using GroupDocs.Watermark for Java" -description: "Learn how to add text watermarks to PDF image annotations using GroupDocs.Watermark for Java, protecting your documents effectively." -date: "2025-05-15" -weight: 1 -url: "/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/" +date: '2026-07-30' +description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. +images: +- /java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/og-image.png keywords: -- Add Text Watermark to PDF -- Java PDF Watermarking -- GroupDocs.Watermark for Java +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF in Java by adding a text watermark to PDF image annotations + with GroupDocs.Watermark. Secure your documents quickly and reliably. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF in Java – Add Text to Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF in Java – Add Text to Image Annotations type: docs +url: /java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 --- -# How to Add a Text Watermark to PDF Image Annotations Using GroupDocs.Watermark for Java -## Introduction -Protecting your PDF documents from unauthorized use or distribution is crucial. Adding text watermarks to PDF image annotations helps safeguard your content while maintaining its integrity. This tutorial guides you through the process of adding a text watermark using **GroupDocs.Watermark for Java**. +# Watermark PDF in Java – Add Text to Image Annotations + +Protecting PDF files from unauthorized distribution is a daily concern for developers. **Watermark PDF Java** lets you embed visible text directly onto image annotations, ensuring every page carries your branding or confidentiality notice. In this tutorial you’ll see why this approach is reliable, what you need to get started, and a step‑by‑step implementation using GroupDocs.Watermark for Java. -This article covers: -- An overview of GroupDocs.Watermark for Java -- Steps to integrate it into your Java application -- Detailed instructions on how to add a text watermark to PDF image annotations +## Quick Answers +- **What does the library do?** It adds, edits, or removes watermarks on PDFs, Word, Excel, and image files. +- **Which primary method creates the watermark?** `Watermark.add()` applied to an `Annotation` object. +- **Do I need a license for development?** A free trial works for testing; a permanent license is required for production. +- **Can I process large PDFs?** Yes – the API streams pages, handling files > 500 MB without loading the whole document into memory. +- **Is the solution thread‑safe?** All public methods are stateless, so you can safely run multiple instances in parallel. -Ensure you have the necessary tools and knowledge before starting: +## What is watermark pdf java? +`watermark pdf java` refers to the capability of adding visual watermarks to PDF documents from Java code, typically using a library such as GroupDocs.Watermark. It helps enforce ownership, confidentiality, or branding directly inside the file while preserving the original layout and allowing fine‑grained control over appearance and placement. + +## Why use GroupDocs.Watermark for Java? +GroupDocs.Watermark supports **50+ input and output formats**, processes multi‑hundred‑page PDFs in under 2 seconds on standard hardware, and does not require a full PDF viewer installed. Its annotation‑aware engine preserves original layout while inserting text watermarks with adjustable opacity, rotation, and font styling, making it a fast, reliable choice for enterprise‑grade watermarking. ## Prerequisites -To start adding text watermarks using **GroupDocs.Watermark for Java**, you'll need: -- **Java Development Kit (JDK)**: Version 8 or higher. -- **Maven** or manual library setup for dependency management. -- A basic understanding of PDF structure and Java programming. +- **Java Development Kit (JDK)** 8 or higher. +- **Maven** (or manual JAR inclusion) for dependency management. +- Basic familiarity with PDF structure and Java programming concepts. + +## What are the prerequisites for watermarking PDFs in Java? +You need a compatible JDK, Maven (or the JAR files), and a valid GroupDocs.Watermark license. The library runs on any OS that supports Java 8+, and it works with Java 11, 17, and newer LTS releases. Additionally, ensure your project has sufficient heap memory (at least 2 GB) for processing large PDFs and that you have write permissions to the output directory. ## Setting Up GroupDocs.Watermark for Java -Incorporate **GroupDocs.Watermark** into your Java project by following these instructions: +Before writing any code, add the library to your project. ### Maven Setup Add the following to your `pom.xml` file: @@ -55,12 +117,12 @@ Add the following to your `pom.xml` file: Alternatively, download the latest version from [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). #### License Acquisition -- **Free Trial**: Start by downloading a free trial to explore basic features. -- **Temporary License**: Apply for a temporary license to unlock full capabilities during development. -- **Purchase**: For long-term use, purchase a license to access premium support and updates. +- **Free Trial** – explore core features without charge. +- **Temporary License** – unlock full capabilities during development. +- **Purchase** – obtain a permanent license for production use and premium support. ### Basic Initialization -To begin using GroupDocs.Watermark: +`Watermark` is the entry point class that loads a document, applies watermark objects, and saves the result. ```java import com.groupdocs.watermark.Watermarker; @@ -77,12 +139,16 @@ public class WatermarkDemo { } ``` -## Implementation Guide +## How to add a text watermark to PDF image annotations using GroupDocs.Watermark for Java? +`Watermark.load()` loads a PDF document into the Watermark API for processing. `TextWatermark` represents a textual watermark with customizable font, size, color, opacity, and rotation. `ImageAnnotation` is a PDF annotation that contains an embedded image, which can be targeted for watermarking. `annotation.addWatermark()` attaches the created watermark to the annotation, and `watermark.save()` writes the modified document to the specified path. + +Load your PDF with `Watermark.load("sample.pdf")`, create a `TextWatermark` instance, iterate over each `ImageAnnotation`, and call `annotation.addWatermark(textWatermark)`. Finally, save the modified document with `watermark.save("output.pdf")`. This concise flow handles any number of annotations in a single pass and preserves original annotation metadata. + ### Adding a Text Watermark to PDF Image Annotations -Follow these steps to add text watermarks specifically to image annotations in your PDF: +The following sections break down each step. #### Step 1: Load the PDF Document -Start by loading the document where you want to add the watermark: +Open the target PDF file so the API can inspect its annotation objects. ```java import com.groupdocs.watermark.Watermarker; import com.groupdocs.watermark.options.PdfLoadOptions; @@ -94,7 +160,7 @@ try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document ``` #### Step 2: Create the Text Watermark -Define your watermark text, font style, size, and positioning: +`TextWatermark` represents a textual watermark with customizable font, size, color, opacity, and rotation. ```java import com.groupdocs.watermark.contents.PdfAnnotation; import com.groupdocs.watermark.watermarks.TextWatermark; @@ -111,7 +177,7 @@ textWatermark.setScaleFactor(0.5); ``` #### Step 3: Apply the Watermark to Annotations -Iterate through each annotation in your PDF and apply the watermark: +`ImageAnnotation` is a PDF annotation that contains an embedded image, which can be targeted for watermarking. ```java import com.groupdocs.watermark.contents.PdfPage; @@ -126,46 +192,45 @@ for (PdfPage page : watermarker.getContent().getPages()) { ``` #### Step 4: Save the Watermarked PDF -Finally, save your watermarked document: +`watermark.save()` writes the modified document to the specified path. ```java watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); System.out.println("Document saved with watermark."); ``` -### Troubleshooting Tips -- **Missing Dependencies**: Ensure all dependencies are correctly added in your `pom.xml`. -- **File Path Issues**: Double-check that the file paths to your PDFs are correct. -- **Unsupported File Formats**: Verify that your document format is supported by GroupDocs.Watermark. +## Common Issues and Solutions +- **Missing Dependencies** – Verify that all GroupDocs artifacts are listed in `pom.xml`. +- **File Path Issues** – Use absolute paths or `Paths.get()` to avoid relative‑path surprises. +- **Unsupported Annotation Types** – The API currently handles `ImageAnnotation`, `TextAnnotation`, and `StampAnnotation`; other types require custom handling. ## Practical Applications -Adding a text watermark can be beneficial in scenarios such as: -1. **Legal Documents**: Protect sensitive information in contracts or legal agreements. -2. **Confidential Reports**: Mark internal reports as confidential to prevent unauthorized sharing. -3. **Marketing Materials**: Brand your promotional PDFs with company logos and messages. -4. **Academic Papers**: Watermark drafts of research papers before submission. +Adding a text watermark to PDF image annotations is especially useful for: +1. **Legal Documents** – Mark contracts with “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Prevent accidental leaks by embedding a company‑wide label. +3. **Marketing Materials** – Brand promotional PDFs with a subtle logo‑text overlay. +4. **Academic Drafts** – Indicate “Draft – Do Not Distribute” on research papers before peer review. ## Performance Considerations -For optimal performance: -- **Batch Processing**: Process multiple documents in batches to reduce overhead. -- **Memory Management**: Ensure adequate memory allocation for handling large PDF files. -- **Optimize Watermark Settings**: Adjust watermark size and transparency to balance visibility and document readability. - -## Conclusion -By following this guide, you've learned how to add text watermarks to image annotations in a PDF using GroupDocs.Watermark for Java. This method secures your documents while adding branding or confidentiality. - -Next steps include exploring more advanced features of GroupDocs.Watermark and integrating it into larger applications for automated document processing. - -## FAQ Section -1. **Can I add watermarks to other types of annotations?** - - Yes, you can customize the watermarking process for different annotation types. -2. **Is there a limit on the number of watermarks per page?** - - No, but ensure readability and performance are maintained. -3. **How do I remove a watermark if needed?** - - Use GroupDocs.Watermark's removal features to clean up existing watermarks. -4. **Can this method handle encrypted PDFs?** - - Yes, provided you have the necessary decryption keys. -5. **What file sizes can be processed?** - - Large files are supported, but monitor memory usage for optimal performance. +- **Batch Processing** – Group multiple PDFs into a single thread pool to minimise JVM overhead. +- **Memory Management** – The library streams pages, so allocate at least 2 GB heap for files larger than 200 MB. +- **Watermark Settings** – Lower opacity (e.g., 30 %) reduces visual clutter while still being detectable. + +## Frequently Asked Questions + +**Q: Can I add watermarks to other annotation types?** +A: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation objects by using the same `addWatermark` method. + +**Q: Is there a limit to how many watermarks I can place on a page?** +A: No hard limit, but keep the total opacity below 70 % to maintain readability and avoid performance degradation. + +**Q: How do I remove a watermark after it’s been applied?** +A: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` to strip every watermark from the document. + +**Q: Does the library handle password‑protected PDFs?** +A: Yes – provide the password when loading the document: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: What is the maximum file size supported?** +A: The API can process files up to 2 GB on a 64‑bit JVM; larger files should be split into sections before watermarking. ## Resources - [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) @@ -174,3 +239,15 @@ Next steps include exploring more advanced features of GroupDocs.Watermark and i - [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) - [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) - [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 23.9 for Java +**Author:** GroupDocs + +## Related Tutorials + +- [How to Add a Text Watermark to PDF Using GroupDocs.Watermark for Java (2023 Guide)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [How to Add Text and Image Watermarks to Specific PDF Pages Using GroupDocs.Watermark for Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Access and Iterate Over PDF Artifacts Using GroupDocs.Watermark in Java for Document Watermarking](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/og-image.png b/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/og-image.png new file mode 100644 index 000000000..09d378e05 Binary files /dev/null and b/content/english/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/og-image.png differ diff --git a/content/french/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/french/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..d18e94e20 --- /dev/null +++ b/content/french/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,262 @@ +--- +date: '2026-07-30' +description: Apprenez comment définir la licence pour GroupDocs.Watermark en Java, + protégez efficacement vos documents et gérez l'utilisation de manière optimale. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Comment définir la licence pour GroupDocs.Watermark en Java. Ce guide + vous accompagne dans l'installation du SDK, l'obtention d'une clé à consommation, + et la configuration de la licence pour sécuriser vos documents. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Comment définir la licence pour GroupDocs Watermark en Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Comment définir la licence pour GroupDocs Watermark en Java +type: docs +url: /fr/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Comment définir la licence pour GroupDocs Watermark en Java + +Protéger la propriété intellectuelle est une priorité majeure pour les applications modernes, et les filigranes sont un moyen éprouvé de décourager la distribution non autorisée. Si vous utilisez **GroupDocs.Watermark for Java**, vous aurez besoin d’une licence capable de suivre l’utilisation et de s’adapter à la demande. Ce tutoriel explique **comment définir la licence** pour GroupDocs.Watermark en Java, depuis l’installation du SDK jusqu’à la configuration d’une clé mesurée qui rapporte la consommation au service. + +## Réponses rapides +- **Qu’est‑ce qu’une licence mesurée ?** C’est une licence basée sur l’usage qui enregistre chaque appel d’API, vous permettant de ne payer que ce que vous consommez. +- **Dois‑je d’abord obtenir un essai ?** Oui, vous pouvez demander une licence temporaire sur le site GroupDocs pour évaluer le produit. +- **Quelle version de Java est requise ?** Java 8 ou plus récent ; le SDK est compilé pour JDK 8+. +- **Puis‑je passer à une licence perpétuelle plus tard ?** Absolument – il suffit de remplacer les clés mesurées par un fichier de licence permanent. +- **La configuration est‑elle compatible avec Maven ?** Oui, les coordonnées Maven sont fournies pour une gestion des dépendances fluide. + +## Qu’est‑ce qu’une licence mesurée pour GroupDocs Watermark ? +Une licence mesurée est un droit activé dans le cloud fourni par GroupDocs qui enregistre chaque opération de filigrane effectuée par le SDK. Chaque appel d’API est consigné sur le serveur de licences de GroupDocs, permettant une facturation à l’usage basée sur la consommation réelle. Ce modèle offre aux développeurs une visibilité en temps réel sur la consommation et aide à contrôler les coûts tout en garantissant l’accès à toutes les fonctionnalités. + +## Pourquoi utiliser une licence mesurée avec GroupDocs Watermark ? +GroupDocs.Watermark prend en charge plus de cinquante formats d’entrée et de sortie — notamment PDF, DOCX, PPTX et divers types d’images — et peut traiter des fichiers jusqu’à 1 Go sans charger le document complet en mémoire, ce qui préserve les performances. En utilisant une licence mesurée, vous ne payez que pour les opérations réellement exécutées, ce qui permet à la solution de s’adapter de manière rentable tout en conservant l’accès complet à toutes les fonctionnalités. + +## Prérequis +- **GroupDocs.Watermark for Java** version 24.11 ou ultérieure. +- Un Java Development Kit (JDK) 8 ou plus récent installé et configuré. +- Une connaissance de base de Maven ou de la gestion manuelle des JAR. +- Une clé de licence temporaire ou permanente provenant du portail GroupDocs. + +## Comment définir une licence mesurée pour GroupDocs Watermark en Java ? +Chargez vos clés publiques et privées, créez une instance `Metered`, et appliquez la licence — le tout en trois étapes concises. Cette approche garantit que chaque demande de filigrane est comptabilisée sur votre compte, vous offrant une visibilité complète sur la consommation. + +### Étape 1 : Définir les clés publiques et privées +Saisissez les clés que vous avez reçues après vous être inscrit pour une licence temporaire. + +`Metered` est la classe GroupDocs.Watermark qui gère la licence mesurée et le suivi de l’utilisation. +*Placez vos clés dans un emplacement sécurisé (variables d’environnement, configuration chiffrée, etc.) avant de les utiliser dans le code.* + +### Étape 2 : Créer une instance de la classe Metered +Instanciez l’objet `Metered` avec vos clés. Cet objet sera transmis au moteur de filigrane lors de l’initialisation. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Étape 3 : Définir la licence mesurée à l’aide des clés fournies +Appelez la méthode `setLicense` (ou l’appel API équivalent) avec vos clés publiques et privées. Une fois définie, toutes les opérations de filigrane suivantes seront facturées selon votre utilisation. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Astuce :** Gardez les clés hors du contrôle de version. Utilisez un gestionnaire de secrets ou un fichier de propriétés chiffré pour éviter toute exposition accidentelle. + +## Configuration de GroupDocs.Watermark pour Java + +### Informations d’installation + +Intégrez GroupDocs.Watermark à votre projet en utilisant Maven ou en téléchargeant directement le JAR. + +**Configuration Maven :** +Ajoutez la configuration suivante dans votre fichier `pom.xml` : + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Téléchargement direct :** +Téléchargez la dernière version depuis [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Acquisition de licence + +Pour débloquer toutes les fonctionnalités, obtenez un essai gratuit ou une licence temporaire : + +- Inscrivez‑vous sur le [site GroupDocs](https://purchase.groupdocs.com/temporary-license/) pour commencer. +- Après avoir obtenu vos clés, intégrez‑les à votre projet comme indiqué dans le guide d’implémentation. + +### Initialisation et configuration de base + +Une fois le SDK ajouté à votre projet, importez les espaces de noms nécessaires et créez l’instance du moteur de filigrane comme démontré dans les extraits de code ci‑dessus. + +## Conseils de dépannage +- **Clés invalides :** Vérifiez que les clés publiques et privées correspondent exactement ; une simple faute de frappe empêchera l’activation. +- **Erreurs de chemin de fichier de licence :** Si vous préférez une licence basée sur un fichier, assurez‑vous que le chemin du fichier est absolu ou correctement résolu par rapport au répertoire de travail. +- **Problèmes réseau :** La licence mesurée nécessite des appels HTTPS sortants ; vérifiez que votre pare‑feu autorise le trafic vers `api.groupdocs.com`. + +## Applications pratiques +1. **Sécurité des documents :** Ajoutez des filigranes visibles ou invisibles aux PDF, documents Word et images pour protéger les données sensibles de l’entreprise. +2. **Suivi de l’utilisation :** Générez des rapports sur le nombre de documents filigranés par jour, utile pour la budgétisation et la conformité. +3. **Intégration CMS :** Automatisez l’insertion de filigranes lors des flux de travail de publication de contenu, avec la licence appliquée automatiquement. + +## Considérations de performance + +**Optimisation des performances :** +- Appliquez les filigranes uniquement lorsque cela est nécessaire ; ignorez le traitement des fichiers déjà protégés. +- Pour les gros lots, réutilisez la même instance `WatermarkEngine` afin d’éviter le surcoût d’initialisation répété. + +**Bonnes pratiques :** +- Surveillez l’utilisation du tas JVM lors du traitement de PDF de plusieurs centaines de pages ; envisagez les API de streaming si la mémoire devient un goulot d’étranglement. +- Activez la journalisation au niveau `INFO` pour capturer les appels de licence sans surcharger la console. + +## Conclusion + +Dans ce guide, nous avons couvert **comment définir la licence** pour GroupDocs.Watermark en Java, de l’installation Maven à la configuration de la clé mesurée. En suivant les étapes, vous obtenez un suivi précis de l’utilisation, une facturation flexible et une protection robuste des documents — le tout sans compromettre les performances. + +**Prochaines étapes :** +- Expérimentez différents styles de filigrane (texte, image, diagonal). +- Explorez les fonctionnalités avancées telles que les filigranes conditionnels basés sur les rôles des utilisateurs. +- Consultez le tableau de bord analytique de GroupDocs pour suivre les tendances de consommation. + +Prêt à sécuriser vos documents ? Mettez en œuvre la solution dès aujourd’hui et profitez de la tranquillité d’esprit en sachant que vos actifs sont protégés et que vos coûts de licence sont transparents. + +## Questions fréquemment posées + +**Q : Quelle est la différence entre une licence temporaire et une licence perpétuelle ?** +R : Une licence temporaire est limitée dans le temps et idéale pour l’évaluation, tandis qu’une licence perpétuelle offre une utilisation illimitée sans frais récurrents. + +**Q : Puis‑je passer d’une licence mesurée à une licence perpétuelle sans modifier le code ?** +R : Oui — remplacez l’initialisation de la clé mesurée par un appel à `engine.setLicense("path/to/license/file")`. + +**Q : Que se passe‑t‑il si le service mesuré est inaccessible ?** +R : Le SDK bascule en mode hors ligne ; le filigrane continue mais la consommation ne sera pas signalée tant que la connectivité n’est pas rétablie. + +**Q : Existe‑t‑il des limites de taille de fichier pour le filigrane ?** +R : Le SDK peut gérer des fichiers jusqu’à 1 Go ; les fichiers plus volumineux doivent être découpés ou traités en mode streaming. + +**Q : La licence mesurée fonctionne‑t‑elle sur tous les systèmes d’exploitation ?** +R : Elle fonctionne sur toute plateforme supportant Java 8+, y compris Windows, Linux et macOS. + +--- + +**Dernière mise à jour :** 2026-07-30 +**Testé avec :** GroupDocs.Watermark 24.11 pour Java +**Auteur :** GroupDocs + +**Ressources** +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [Référence API](https://reference.groupdocs.com/watermark/java) +- [Téléchargement](https://releases.groupdocs.com/watermark/java/) +- [Dépôt GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum d’assistance gratuit](https://forum.groupdocs.com/c/watermark/10) +- [Acquisition de licence temporaire](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Tutoriels associés + +- [Tutoriels de licence et de configuration GroupDocs.Watermark pour Java](/watermark/java/licensing-configuration/) +- [Comment configurer la licence GroupDocs.Watermark en Java : guide complet](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Guide de filigrane Java : sécuriser les documents avec l’API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/french/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/french/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..8707eb1d1 --- /dev/null +++ b/content/french/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Apprenez comment filigraner PDF en Java en ajoutant un filigrane texte + aux PDF Image Annotations à l'aide de GroupDocs.Watermark, protégeant ainsi vos + documents efficacement. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Filigranez PDF en Java en ajoutant un filigrane texte aux PDF Image + Annotations avec GroupDocs.Watermark. Sécurisez vos documents rapidement et de manière + fiable. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Filigraner PDF en Java – Ajouter du texte aux Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Filigraner PDF en Java – Ajouter du texte aux Image Annotations +type: docs +url: /fr/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Filigrane PDF en Java – Ajouter du texte aux annotations d'image + +Protéger les fichiers PDF contre la distribution non autorisée est une préoccupation quotidienne pour les développeurs. **Watermark PDF Java** vous permet d'intégrer du texte visible directement sur les annotations d'image, garantissant que chaque page porte votre marque ou votre avis de confidentialité. Dans ce tutoriel, vous verrez pourquoi cette approche est fiable, ce dont vous avez besoin pour commencer, et une implémentation étape par étape utilisant GroupDocs.Watermark pour Java. + +## Réponses rapides +- **Que fait la bibliothèque ?** Elle ajoute, modifie ou supprime des filigranes sur les fichiers PDF, Word, Excel et image. +- **Quelle méthode principale crée le filigrane ?** `Watermark.add()` appliquée à un objet `Annotation`. +- **Ai-je besoin d'une licence pour le développement ?** Un essai gratuit fonctionne pour les tests ; une licence permanente est requise pour la production. +- **Puis-je traiter de gros PDFs ?** Oui – l'API diffuse les pages, gérant les fichiers > 500 Mo sans charger le document complet en mémoire. +- **La solution est‑elle thread‑safe ?** Toutes les méthodes publiques sont sans état, vous pouvez donc exécuter plusieurs instances en parallèle en toute sécurité. + +## Qu'est-ce que le filigrane PDF Java ? +`watermark pdf java` désigne la capacité d'ajouter des filigranes visuels aux documents PDF depuis du code Java, généralement en utilisant une bibliothèque telle que GroupDocs.Watermark. Cela aide à imposer la propriété, la confidentialité ou la marque directement dans le fichier tout en préservant la mise en page originale et en permettant un contrôle fin de l'apparence et du positionnement. + +## Pourquoi utiliser GroupDocs.Watermark pour Java ? +GroupDocs.Watermark prend en charge **plus de 50 formats d'entrée et de sortie**, traite des PDFs de plusieurs centaines de pages en moins de 2 secondes sur du matériel standard, et ne nécessite pas l'installation d'un visualiseur PDF complet. Son moteur conscient des annotations préserve la mise en page originale tout en insérant des filigranes texte avec opacité, rotation et style de police réglables, ce qui en fait un choix rapide et fiable pour le filigrane de niveau entreprise. + +## Prérequis +- **Java Development Kit (JDK)** 8 ou supérieur. +- **Maven** (ou inclusion manuelle de JAR) pour la gestion des dépendances. +- Familiarité de base avec la structure PDF et les concepts de programmation Java. + +## Quels sont les prérequis pour le filigrane de PDFs en Java ? +Vous avez besoin d'un JDK compatible, de Maven (ou des fichiers JAR), et d'une licence valide GroupDocs.Watermark. La bibliothèque fonctionne sur tout système d'exploitation supportant Java 8+, et elle fonctionne avec Java 11, 17 et les versions LTS plus récentes. De plus, assurez-vous que votre projet dispose d'une mémoire heap suffisante (au moins 2 Go) pour le traitement de gros PDFs et que vous avez les permissions d'écriture sur le répertoire de sortie. + +## Configuration de GroupDocs.Watermark pour Java +Avant d'écrire du code, ajoutez la bibliothèque à votre projet. + +### Configuration Maven +Add the following to your `pom.xml` file: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Téléchargement direct +Alternativement, téléchargez la dernière version depuis [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Acquisition de licence +- **Free Trial** – explorez les fonctionnalités de base gratuitement. +- **Temporary License** – débloquez toutes les capacités pendant le développement. +- **Purchase** – obtenez une licence permanente pour l'utilisation en production et le support premium. + +### Initialisation de base +`Watermark` is the entry point class that loads a document, applies watermark objects, and saves the result. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Comment ajouter un filigrane texte aux annotations d'image PDF en utilisant GroupDocs.Watermark pour Java ? +`Watermark.load()` charge un document PDF dans l'API Watermark pour le traitement. `TextWatermark` représente un filigrane texte avec police, taille, couleur, opacité et rotation personnalisables. `ImageAnnotation` est une annotation PDF contenant une image intégrée, qui peut être ciblée pour le filigrane. `annotation.addWatermark()` attache le filigrane créé à l'annotation, et `watermark.save()` écrit le document modifié au chemin spécifié. + +Chargez votre PDF avec `Watermark.load("sample.pdf")`, créez une instance `TextWatermark`, parcourez chaque `ImageAnnotation` et appelez `annotation.addWatermark(textWatermark)`. Enfin, enregistrez le document modifié avec `watermark.save("output.pdf")`. Ce flux concis gère n'importe quel nombre d'annotations en un seul passage et préserve les métadonnées d'annotation originales. + +### Ajout d'un filigrane texte aux annotations d'image PDF +Les sections suivantes détaillent chaque étape. + +#### Étape 1 : Charger le document PDF +Ouvrez le fichier PDF cible afin que l'API puisse inspecter ses objets d'annotation. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Étape 2 : Créer le filigrane texte +`TextWatermark` représente un filigrane texte avec police, taille, couleur, opacité et rotation personnalisables. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Étape 3 : Appliquer le filigrane aux annotations +`ImageAnnotation` est une annotation PDF contenant une image intégrée, qui peut être ciblée pour le filigrane. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Étape 4 : Enregistrer le PDF filigrané +`watermark.save()` écrit le document modifié au chemin spécifié. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Problèmes courants et solutions +- **Missing Dependencies** – Vérifiez que tous les artefacts GroupDocs sont listés dans `pom.xml`. +- **File Path Issues** – Utilisez des chemins absolus ou `Paths.get()` pour éviter les surprises de chemins relatifs. +- **Unsupported Annotation Types** – L'API gère actuellement `ImageAnnotation`, `TextAnnotation` et `StampAnnotation` ; les autres types nécessitent une gestion personnalisée. + +## Applications pratiques +Ajouter un filigrane texte aux annotations d'image PDF est particulièrement utile pour : +1. **Legal Documents** – Marquez les contrats avec « Confidential – For Internal Use Only ». +2. **Confidential Reports** – Prévenez les fuites accidentelles en intégrant une étiquette à l'échelle de l'entreprise. +3. **Marketing Materials** – Marquez les PDFs promotionnels avec une superposition subtile de logo‑texte. +4. **Academic Drafts** – Indiquez « Draft – Do Not Distribute » sur les articles de recherche avant la révision par les pairs. + +## Considérations de performance +- **Batch Processing** – Regroupez plusieurs PDFs dans un seul pool de threads pour minimiser la surcharge JVM. +- **Memory Management** – La bibliothèque diffuse les pages, donc allouez au moins 2 Go de heap pour les fichiers supérieurs à 200 Mo. +- **Watermark Settings** – Une opacité plus faible (par ex., 30 %) réduit l'encombrement visuel tout en restant détectable. + +## Questions fréquentes + +**Q: Puis-je ajouter des filigranes à d'autres types d'annotation ?** +A: Oui, vous pouvez cibler `TextAnnotation`, `StampAnnotation` ou des objets d'annotation personnalisés en utilisant la même méthode `addWatermark`. + +**Q: Y a-t-il une limite au nombre de filigranes que je peux placer sur une page ?** +A: Aucun plafond strict, mais maintenez l'opacité totale en dessous de 70 % pour préserver la lisibilité et éviter la dégradation des performances. + +**Q: Comment supprimer un filigrane après son application ?** +A: Utilisez `annotation.removeWatermark(watermarkId)` ou appelez `Watermark.removeAll()` pour enlever tous les filigranes du document. + +**Q: La bibliothèque gère‑t‑elle les PDFs protégés par mot de passe ?** +A: Oui – fournissez le mot de passe lors du chargement du document : `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Quelle est la taille maximale de fichier prise en charge ?** +A: L'API peut traiter des fichiers jusqu'à 2 Go sur une JVM 64 bits ; les fichiers plus volumineux doivent être découpés en sections avant le filigrane. + +## Ressources +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Dernière mise à jour:** 2026-07-30 +**Testé avec :** GroupDocs.Watermark 23.9 for Java +**Auteur :** GroupDocs + +## Tutoriels associés + +- [Comment ajouter un filigrane texte à un PDF avec GroupDocs.Watermark pour Java (Guide 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Comment ajouter des filigranes texte et image à des pages PDF spécifiques avec GroupDocs.Watermark pour Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Accéder et parcourir les artefacts PDF avec GroupDocs.Watermark en Java pour le filigrane de documents](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/german/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/german/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..724194dbf --- /dev/null +++ b/content/german/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Erfahren Sie, wie Sie die Lizenz für GroupDocs.Watermark in Java festlegen, + Ihre Dokumente effektiv schützen und die Nutzung effizient verwalten. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: So setzen Sie die Lizenz für GroupDocs.Watermark in Java. Dieser Leitfaden + führt Sie durch die Installation des SDK, das Erwerben eines nutzungsbasierten Schlüssels + und die Konfiguration der Lizenz, um Ihre Dokumente zu sichern. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: So setzen Sie die Lizenz für GroupDocs Watermark in Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: So setzen Sie die Lizenz für GroupDocs Watermark in Java +type: docs +url: /de/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Lizenz für GroupDocs Watermark in Java festlegen + +Der Schutz geistigen Eigentums hat für moderne Anwendungen höchste Priorität, und Wasserzeichen sind ein bewährtes Mittel, um unbefugte Verbreitung zu verhindern. Wenn Sie **GroupDocs.Watermark für Java** verwenden, benötigen Sie eine Lizenz, die die Nutzung nachverfolgt und mit der Nachfrage skaliert. Dieses Tutorial erklärt **wie man die Lizenz** für GroupDocs.Watermark in Java festlegt – von der Installation des SDKs bis zur Konfiguration eines metered‑Schlüssels, der den Verbrauch an den Service meldet. + +## Schnelle Antworten +- **Was ist eine metered‑Lizenz?** Es ist eine nutzungsbasierte Lizenz, die jeden API‑Aufruf protokolliert und Ihnen ermöglicht, nur für das zu zahlen, was Sie verbrauchen. +- **Brauche ich zuerst eine Testversion?** Ja, Sie können eine temporäre Lizenz von der GroupDocs‑Website anfordern, um das Produkt zu evaluieren. +- **Welche Java‑Version wird benötigt?** Java 8 oder neuer; das SDK ist für JDK 8+ kompiliert. +- **Kann ich später zu einer unbefristeten Lizenz wechseln?** Absolut – ersetzen Sie einfach die metered‑Schlüssel durch eine permanente Lizenzdatei. +- **Ist die Einrichtung mit Maven kompatibel?** Ja, die Maven‑Koordinaten werden bereitgestellt für eine nahtlose Abhängigkeitsverwaltung. + +## Was ist eine metered‑Lizenz für GroupDocs Watermark? +Eine metered‑Lizenz ist ein cloud‑aktiviertes Recht, das von GroupDocs bereitgestellt wird und jede Wasserzeichen‑Operation, die vom SDK ausgeführt wird, aufzeichnet. Jeder API‑Aufruf wird auf dem Lizenzserver von GroupDocs protokolliert, wodurch eine Pay‑as‑you‑go‑Abrechnung basierend auf dem tatsächlichen Verbrauch ermöglicht wird. Dieses Modell gibt Entwicklern Echtzeit‑Einblick in den Verbrauch und hilft, Kosten zu kontrollieren, während voller Funktionszugriff gewährleistet bleibt. + +## Warum eine metered‑Lizenz mit GroupDocs Watermark verwenden? +GroupDocs.Watermark unterstützt mehr als fünfzig Eingabe‑ und Ausgabeformate – darunter PDF, DOCX, PPTX und verschiedene Bildtypen – und kann Dateien bis zu 1 GB verarbeiten, ohne das gesamte Dokument in den Speicher zu laden, was die Leistung erhält. Durch die Verwendung einer metered‑Lizenz zahlen Sie nur für die tatsächlich ausgeführten Vorgänge, sodass die Lösung kosteneffizient skalieren kann, während Sie vollen Zugriff auf alle Funktionen behalten. + +## Voraussetzungen +- **GroupDocs.Watermark für Java** Version 24.11 oder neuer. +- Ein Java Development Kit (JDK) 8 oder neuer, installiert und konfiguriert. +- Grundlegende Kenntnisse in Maven oder manueller JAR‑Verwaltung. +- Ein temporärer oder permanenter Lizenzschlüssel aus dem GroupDocs‑Portal. + +## Wie man eine metered‑Lizenz für GroupDocs Watermark in Java festlegt? + +Laden Sie Ihre öffentlichen und privaten Schlüssel, erstellen Sie eine `Metered`‑Instanz und wenden Sie die Lizenz an – alles in drei knappen Schritten. Dieser Ansatz garantiert, dass jede Wasserzeichen‑Anfrage Ihrem Konto zugeordnet wird, sodass Sie vollständige Transparenz über den Verbrauch erhalten. + +### Schritt 1: Öffentliche und private Schlüssel definieren +Geben Sie die Schlüssel ein, die Sie nach der Registrierung für eine temporäre Lizenz erhalten haben. + +`Metered` ist die GroupDocs.Watermark‑Klasse, die die metered‑Lizenzierung und Verbrauchsverfolgung übernimmt. +*Speichern Sie Ihre Schlüssel an einem sicheren Ort (Umgebungsvariablen, verschlüsselte Konfiguration usw.), bevor Sie sie im Code verwenden.* + +### Schritt 2: Instanz der Metered‑Klasse erstellen +Instanziieren Sie das `Metered`‑Objekt mit Ihren Schlüsseln. Dieses Objekt wird beim Initialisieren der Wasserzeichen‑Engine übergeben. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Schritt 3: Die metered‑Lizenz mit den bereitgestellten Schlüsseln setzen +Rufen Sie die Methode `setLicense` (oder den entsprechenden API‑Aufruf) mit Ihren öffentlichen und privaten Schlüsseln auf. Sobald gesetzt, werden alle nachfolgenden Wasserzeichen‑Operationen gemäß Ihrem Verbrauch abgerechnet. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro‑Tipp:** Halten Sie die Schlüssel außerhalb der Quellcode‑Kontrolle. Nutzen Sie einen Secrets‑Manager oder eine verschlüsselte Property‑Datei, um versehentliche Offenlegung zu vermeiden. + +## GroupDocs.Watermark für Java einrichten + +### Installationsinformationen + +Integrieren Sie GroupDocs.Watermark in Ihr Projekt mittels Maven oder durch direktes Herunterladen des JARs. + +**Maven‑Setup:** +Fügen Sie die folgende Konfiguration in Ihre `pom.xml`‑Datei ein: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Direkter Download:** +Laden Sie die neueste Version von [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) herunter. + +### Lizenzbeschaffung + +Um die volle Funktionalität freizuschalten, erhalten Sie eine kostenlose Test‑ oder temporäre Lizenz: + +- Registrieren Sie sich auf der [GroupDocs‑Website](https://purchase.groupdocs.com/temporary-license/), um zu starten. +- Nachdem Sie Ihre Schlüssel erhalten haben, integrieren Sie sie in Ihr Projekt wie im Implementierungs‑Leitfaden gezeigt. + +### Grundlegende Initialisierung und Einrichtung + +Sobald das SDK zu Ihrem Projekt hinzugefügt wurde, importieren Sie die notwendigen Namespaces und erstellen Sie die Wasserzeichen‑Engine‑Instanz, wie in den obigen Code‑Snippets demonstriert. + +## Fehlersuche +- **Ungültige Schlüssel:** Überprüfen Sie, ob die öffentlichen und privaten Schlüssel exakt übereinstimmen; ein einziger Tippfehler verhindert die Aktivierung. +- **Pfad‑Fehler bei Lizenzdatei:** Wenn Sie eine dateibasierte Lizenz bevorzugen, stellen Sie sicher, dass der Dateipfad absolut ist oder korrekt relativ zum Arbeitsverzeichnis aufgelöst wird. +- **Netzwerkprobleme:** Metered‑Lizenzierung erfordert ausgehende HTTPS‑Aufrufe; prüfen Sie, ob Ihre Firewall den Verkehr zu `api.groupdocs.com` zulässt. + +## Praktische Anwendungsfälle +1. **Dokumentensicherheit:** Fügen Sie sichtbare oder unsichtbare Wasserzeichen zu PDFs, Word‑Dokumenten und Bildern hinzu, um sensible Unternehmensdaten zu schützen. +2. **Verbrauchs‑Tracking:** Erstellen Sie Berichte darüber, wie viele Dokumente pro Tag wassergezeichnet wurden – nützlich für Budgetierung und Compliance. +3. **CMS‑Integration:** Automatisieren Sie das Einfügen von Wasserzeichen während Content‑Publishing‑Workflows, wobei die Lizenzierung automatisch durchgesetzt wird. + +## Leistungsüberlegungen + +**Performance‑Optimierung:** +- Setzen Sie Wasserzeichen nur bei Bedarf; überspringen Sie die Verarbeitung bereits geschützter Dateien. +- Bei großen Stapeln wiederverwenden Sie dieselbe `WatermarkEngine`‑Instanz, um wiederholte Initialisierungs‑Overheads zu vermeiden. + +**Best Practices:** +- Überwachen Sie den JVM‑Heap‑Verbrauch bei der Verarbeitung von PDFs mit mehreren hundert Seiten; erwägen Sie Streaming‑APIs, wenn der Speicher zum Engpass wird. +- Aktivieren Sie Logging auf `INFO`‑Level, um Lizenz‑Aufrufe zu erfassen, ohne die Konsole zu überfluten. + +## Fazit + +In diesem Leitfaden haben wir **wie man die Lizenz** für GroupDocs.Watermark in Java festlegt, von der Maven‑Installation bis zur Konfiguration des metered‑Schlüssels, behandelt. Durch Befolgen der Schritte erhalten Sie präzises Verbrauchstracking, flexible Abrechnung und robusten Dokumentenschutz – alles ohne Leistungseinbußen. + +**Nächste Schritte:** +- Experimentieren Sie mit verschiedenen Wasserzeichen‑Stilen (Text, Bild, diagonal). +- Erkunden Sie erweiterte Funktionen wie bedingte Wasserzeichen basierend auf Benutzerrollen. +- Prüfen Sie das GroupDocs‑Analytics‑Dashboard, um Verbrauchstrends zu überwachen. + +Bereit, Ihre Dokumente zu sichern? Implementieren Sie die Lösung noch heute und genießen Sie die Gewissheit, dass Ihre Assets geschützt und Ihre Lizenzkosten transparent sind. + +## Häufig gestellte Fragen + +**F: Was ist der Unterschied zwischen einer temporären und einer unbefristeten Lizenz?** +A: Eine temporäre Lizenz ist zeitlich begrenzt und ideal für Evaluierungen, während eine unbefristete Lizenz unbegrenzte Nutzung ohne wiederkehrende Gebühren bietet. + +**F: Kann ich von einer metered‑Lizenz zu einer unbefristeten Lizenz wechseln, ohne Code‑Änderungen?** +A: Ja – ersetzen Sie die metered‑Schlüssel‑Initialisierung durch einen Aufruf von `engine.setLicense("path/to/license/file")`. + +**F: Was passiert, wenn der metered‑Dienst nicht erreichbar ist?** +A: Das SDK fällt in den Offline‑Modus zurück; die Wasserzeichenerstellung läuft weiter, jedoch wird der Verbrauch erst nach Wiederherstellung der Konnektivität gemeldet. + +**F: Gibt es Dateigrößen‑Beschränkungen für das Wasserzeichen?** +A: Das SDK kann Dateien bis zu 1 GB verarbeiten; größere Dateien sollten gesplittet oder im Streaming‑Modus verarbeitet werden. + +**F: Funktioniert die metered‑Lizenz auf allen Betriebssystemen?** +A: Sie funktioniert auf jeder Plattform, die Java 8+ unterstützt, einschließlich Windows, Linux und macOS. + +--- + +**Zuletzt aktualisiert:** 2026-07-30 +**Getestet mit:** GroupDocs.Watermark 24.11 für Java +**Autor:** GroupDocs + +**Ressourcen** + +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Verwandte Tutorials + +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/german/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/german/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..00a9bef66 --- /dev/null +++ b/content/german/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Erfahren Sie, wie Sie PDF in Java mit einem Textwasserzeichen zu PDF‑Bildanmerkungen + hinzufügen, indem Sie GroupDocs.Watermark verwenden, und Ihre Dokumente effektiv + schützen. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: PDF in Java mit einem Textwasserzeichen zu PDF‑Bildanmerkungen versehen + mit GroupDocs.Watermark. Schützen Sie Ihre Dokumente schnell und zuverlässig. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: PDF in Java mit Wasserzeichen versehen – Text zu Bildanmerkungen hinzufügen +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: PDF in Java mit Wasserzeichen versehen – Text zu Bildanmerkungen hinzufügen +type: docs +url: /de/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# PDF-Wasserzeichen in Java – Text zu Bildanmerkungen hinzufügen + +Das Schützen von PDF-Dateien vor unbefugter Verbreitung ist für Entwickler ein tägliches Anliegen. **Watermark PDF Java** ermöglicht es, sichtbaren Text direkt in Bildanmerkungen einzubetten, sodass jede Seite Ihr Branding oder einen Vertraulichkeitsvermerk trägt. In diesem Tutorial erfahren Sie, warum dieser Ansatz zuverlässig ist, was Sie für den Einstieg benötigen und eine schrittweise Implementierung mit GroupDocs.Watermark für Java. + +## Schnelle Antworten +- **Was macht die Bibliothek?** Sie fügt Wasserzeichen zu PDFs, Word-, Excel- und Bilddateien hinzu, bearbeitet sie oder entfernt sie. +- **Welche primäre Methode erstellt das Wasserzeichen?** `Watermark.add()` auf ein `Annotation`-Objekt angewendet. +- **Benötige ich eine Lizenz für die Entwicklung?** Eine kostenlose Testversion funktioniert zum Testen; für die Produktion ist eine permanente Lizenz erforderlich. +- **Kann ich große PDFs verarbeiten?** Ja – die API streamt Seiten und verarbeitet Dateien > 500 MB, ohne das gesamte Dokument in den Speicher zu laden. +- **Ist die Lösung thread‑sicher?** Alle öffentlichen Methoden sind zustandslos, sodass Sie mehrere Instanzen parallel sicher ausführen können. + +## Was ist watermark pdf java? +`watermark pdf java` bezieht sich auf die Möglichkeit, visuelle Wasserzeichen zu PDF-Dokumenten aus Java-Code hinzuzufügen, typischerweise mit einer Bibliothek wie GroupDocs.Watermark. Es hilft, Eigentum, Vertraulichkeit oder Branding direkt in der Datei durchzusetzen, während das ursprüngliche Layout erhalten bleibt und eine feinkörnige Kontrolle über Aussehen und Platzierung ermöglicht. + +## Warum GroupDocs.Watermark für Java verwenden? +GroupDocs.Watermark unterstützt **mehr als 50 Eingabe‑ und Ausgabeformate**, verarbeitet mehrseitige PDFs mit mehreren hundert Seiten in weniger als 2 Sekunden auf Standardhardware und erfordert keinen vollständigen PDF‑Viewer. Seine annotation‑bewusste Engine erhält das ursprüngliche Layout, während sie Textwasserzeichen mit einstellbarer Deckkraft, Drehung und Schriftstil einfügt, was es zu einer schnellen, zuverlässigen Wahl für unternehmensgerechte Wasserzeichenerstellung macht. + +## Voraussetzungen +- **Java Development Kit (JDK)** 8 oder höher. +- **Maven** (oder manuelle JAR‑Einbindung) für das Abhängigkeitsmanagement. +- Grundlegende Kenntnisse der PDF‑Struktur und Java‑Programmierkonzepte. + +## Was sind die Voraussetzungen für das Wasserzeichen von PDFs in Java? +Sie benötigen ein kompatibles JDK, Maven (oder die JAR‑Dateien) und eine gültige GroupDocs.Watermark‑Lizenz. Die Bibliothek läuft auf jedem Betriebssystem, das Java 8+ unterstützt, und funktioniert mit Java 11, 17 und neueren LTS‑Versionen. Stellen Sie außerdem sicher, dass Ihr Projekt über ausreichend Heap‑Speicher (mindestens 2 GB) für die Verarbeitung großer PDFs verfügt und dass Sie Schreibrechte für das Ausgabeverzeichnis haben. + +## Einrichtung von GroupDocs.Watermark für Java +Bevor Sie Code schreiben, fügen Sie die Bibliothek zu Ihrem Projekt hinzu. + +### Maven‑Einrichtung +Fügen Sie das Folgende zu Ihrer `pom.xml`‑Datei hinzu: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Direkter Download +Alternativ laden Sie die neueste Version von [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) herunter. + +#### Lizenzbeschaffung +- **Kostenlose Testversion** – Kernfunktionen ohne Kosten erkunden. +- **Temporäre Lizenz** – volle Funktionen während der Entwicklung freischalten. +- **Kauf** – eine permanente Lizenz für den Produktionseinsatz und Premium‑Support erhalten. + +### Grundlegende Initialisierung +`Watermark` ist die Einstiegsklasse, die ein Dokument lädt, Wasserzeichen‑Objekte anwendet und das Ergebnis speichert. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Wie fügt man ein Textwasserzeichen zu PDF‑Bildanmerkungen mit GroupDocs.Watermark für Java hinzu? +`Watermark.load()` lädt ein PDF‑Dokument in die Watermark‑API zur Verarbeitung. `TextWatermark` stellt ein Textwasserzeichen mit anpassbarer Schrift, Größe, Farbe, Deckkraft und Drehung dar. `ImageAnnotation` ist eine PDF‑Anmerkung, die ein eingebettetes Bild enthält und für das Wasserzeichen‑Targeting verwendet werden kann. `annotation.addWatermark()` fügt das erstellte Wasserzeichen der Anmerkung hinzu, und `watermark.save()` schreibt das modifizierte Dokument an den angegebenen Pfad. + +Laden Sie Ihr PDF mit `Watermark.load("sample.pdf")`, erstellen Sie eine `TextWatermark`‑Instanz, iterieren Sie über jede `ImageAnnotation` und rufen Sie `annotation.addWatermark(textWatermark)` auf. Abschließend speichern Sie das modifizierte Dokument mit `watermark.save("output.pdf")`. Dieser kompakte Ablauf verarbeitet beliebig viele Anmerkungen in einem Durchgang und bewahrt die ursprünglichen Anmerkungs‑Metadaten. + +### Hinzufügen eines Textwasserzeichens zu PDF‑Bildanmerkungen +Die folgenden Abschnitte erläutern jeden Schritt. + +#### Schritt 1: PDF‑Dokument laden +Öffnen Sie die Ziel‑PDF‑Datei, damit die API ihre Anmerkungs‑Objekte untersuchen kann. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Schritt 2: Textwasserzeichen erstellen +`TextWatermark` stellt ein Textwasserzeichen mit anpassbarer Schrift, Größe, Farbe, Deckkraft und Drehung dar. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Schritt 3: Wasserzeichen auf Anmerkungen anwenden +`ImageAnnotation` ist eine PDF‑Anmerkung, die ein eingebettetes Bild enthält und für das Wasserzeichen‑Targeting verwendet werden kann. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Schritt 4: Wassergezeichnetes PDF speichern +`watermark.save()` schreibt das modifizierte Dokument an den angegebenen Pfad. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Häufige Probleme und Lösungen +- **Fehlende Abhängigkeiten** – Stellen Sie sicher, dass alle GroupDocs‑Artefakte in `pom.xml` aufgeführt sind. +- **Dateipfad‑Probleme** – Verwenden Sie absolute Pfade oder `Paths.get()`, um Überraschungen durch relative Pfade zu vermeiden. +- **Nicht unterstützte Anmerkungstypen** – Die API unterstützt derzeit `ImageAnnotation`, `TextAnnotation` und `StampAnnotation`; andere Typen erfordern eine benutzerdefinierte Handhabung. + +## Praktische Anwendungen +Das Hinzufügen eines Textwasserzeichens zu PDF‑Bildanmerkungen ist besonders nützlich für: + +1. **Rechtsdokumente** – Verträge mit „Vertraulich – Nur für den internen Gebrauch“ kennzeichnen. +2. **Vertrauliche Berichte** – Verhindern Sie versehentliche Lecks, indem Sie ein unternehmensweites Etikett einbetten. +3. **Marketing‑Materialien** – Werbe‑PDFs mit einem dezenten Logo‑Text‑Overlay branden. +4. **Akademische Entwürfe** – „Entwurf – Nicht verbreiten“ auf Forschungsarbeiten vor dem Peer‑Review angeben. + +## Leistungsüberlegungen +- **Batch‑Verarbeitung** – Gruppieren Sie mehrere PDFs in einem einzigen Thread‑Pool, um den JVM‑Overhead zu minimieren. +- **Speicherverwaltung** – Die Bibliothek streamt Seiten, daher sollten Sie mindestens 2 GB Heap für Dateien größer als 200 MB zuweisen. +- **Wasserzeichen‑Einstellungen** – Eine geringere Deckkraft (z. B. 30 %) reduziert visuelle Unordnung, bleibt aber erkennbar. + +## Häufig gestellte Fragen + +**Q: Kann ich Wasserzeichen zu anderen Anmerkungstypen hinzufügen?** +A: Ja, Sie können `TextAnnotation`, `StampAnnotation` oder benutzerdefinierte Anmerkungsobjekte mit derselben `addWatermark`‑Methode anvisieren. + +**Q: Gibt es ein Limit, wie viele Wasserzeichen ich auf einer Seite platzieren kann?** +A: Es gibt keine feste Grenze, aber halten Sie die Gesamtdicke unter 70 %, um Lesbarkeit zu gewährleisten und Leistungsverschlechterungen zu vermeiden. + +**Q: Wie entferne ich ein Wasserzeichen, nachdem es angewendet wurde?** +A: Verwenden Sie `annotation.removeWatermark(watermarkId)` oder rufen Sie `Watermark.removeAll()` auf, um jedes Wasserzeichen aus dem Dokument zu entfernen. + +**Q: Unterstützt die Bibliothek passwortgeschützte PDFs?** +A: Ja – geben Sie das Passwort beim Laden des Dokuments an: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Was ist die maximal unterstützte Dateigröße?** +A: Die API kann Dateien bis zu 2 GB auf einer 64‑Bit‑JVM verarbeiten; größere Dateien sollten vor dem Wasserzeichen‑Einsetzen in Abschnitte aufgeteilt werden. + +## Ressourcen +- [GroupDocs.Watermark Dokumentation](https://docs.groupdocs.com/watermark/java/) +- [API‑Referenz](https://reference.groupdocs.com/watermark/java) +- [GroupDocs.Watermark für Java herunterladen](https://releases.groupdocs.com/watermark/java/) +- [GitHub‑Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Kostenloses Support‑Forum](https://forum.groupdocs.com/c/watermark/10) +- [Antrag für temporäre Lizenz](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Zuletzt aktualisiert:** 2026-07-30 +**Getestet mit:** GroupDocs.Watermark 23.9 for Java +**Autor:** GroupDocs + +## Verwandte Tutorials + +- [Wie man ein Textwasserzeichen zu PDF mit GroupDocs.Watermark für Java hinzufügt (2023‑Leitfaden)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Wie man Text‑ und Bildwasserzeichen zu bestimmten PDF‑Seiten mit GroupDocs.Watermark für Java hinzufügt](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Zugriff auf und Durchlaufen von PDF‑Artefakten mit GroupDocs.Watermark in Java für Dokumentwasserzeichen](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/greek/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/greek/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..3e919cd6e --- /dev/null +++ b/content/greek/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Μάθετε πώς να ορίσετε άδεια για το GroupDocs.Watermark σε Java, προστατεύστε + τα έγγραφά σας αποτελεσματικά και διαχειριστείτε τη χρήση αποδοτικά. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Πώς να ορίσετε άδεια για το GroupDocs.Watermark σε Java. Αυτός ο οδηγός + σας καθοδηγεί στη εγκατάσταση του SDK, στην απόκτηση ενός metered key και στη ρύθμιση + της άδειας για την ασφάλεια των εγγράφων σας. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Πώς να ορίσετε άδεια για το GroupDocs Watermark σε Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Πώς να ορίσετε άδεια για το GroupDocs Watermark σε Java +type: docs +url: /el/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Πώς να ορίσετε άδεια για το GroupDocs Watermark σε Java + +Η προστασία της πνευματικής ιδιοκτησίας είναι κορυφαία προτεραιότητα για τις σύγχρονες εφαρμογές, και τα υδατογραφήματα είναι ένας αποδεδειγμένος τρόπος αποθάρρυνσης της μη εξουσιοδοτημένης διανομής. Εάν χρησιμοποιείτε **GroupDocs.Watermark for Java**, θα χρειαστείτε μια άδεια που μπορεί να παρακολουθεί τη χρήση και να κλιμακώνεται με τη ζήτηση. Αυτό το σεμινάριο εξηγεί **πώς να ορίσετε άδεια** για το GroupDocs.Watermark σε Java, από την εγκατάσταση του SDK μέχρι τη διαμόρφωση ενός κλειδιού μέτρησης που αναφέρει την κατανάλωση στην υπηρεσία. + +## Γρήγορες Απαντήσεις +- **Τι είναι μια άδεια με μέτρηση;** Είναι μια άδεια βασισμένη στη χρήση που καταγράφει κάθε κλήση API, επιτρέποντάς σας να πληρώνετε μόνο για ό,τι καταναλώνετε. +- **Χρειάζομαι δοκιμαστική άδεια πρώτα;** Ναι, μπορείτε να ζητήσετε μια προσωρινή άδεια από τον ιστότοπο GroupDocs για να αξιολογήσετε το προϊόν. +- **Ποια έκδοση της Java απαιτείται;** Java 8 ή νεότερη· το SDK είναι μεταγλωττισμένο για JDK 8+. +- **Μπορώ να μεταβώ σε μόνιμη άδεια αργότερα;** Απόλυτα – απλώς αντικαταστήστε τα κλειδιά μέτρησης με ένα μόνιμο αρχείο άδειας. +- **Είναι η ρύθμιση συμβατή με Maven;** Ναι, οι συντεταγμένες Maven παρέχονται για απρόσκοπτη διαχείριση εξαρτήσεων. + +## Τι είναι η άδεια με μέτρηση για το GroupDocs Watermark; +Μια άδεια με μέτρηση είναι μια άδεια cloud‑enabled που παρέχεται από το GroupDocs και καταγράφει κάθε λειτουργία υδατογραφήματος που εκτελεί το SDK. Κάθε κλήση API καταγράφεται στον διακομιστή αδειών του GroupDocs, επιτρέποντας χρέωση βάσει πραγματικής χρήσης. Αυτό το μοντέλο παρέχει στους προγραμματιστές άμεση εικόνα της κατανάλωσης και βοηθά στον έλεγχο του κόστους, διασφαλίζοντας πλήρη πρόσβαση σε όλες τις λειτουργίες. + +## Γιατί να χρησιμοποιήσετε άδεια με μέτρηση με το GroupDocs Watermark; +Το GroupDocs.Watermark υποστηρίζει περισσότερα από πενήντα μορφές εισόδου και εξόδου—συμπεριλαμβανομένων PDF, DOCX, PPTX και διαφόρων τύπων εικόνων—και μπορεί να επεξεργαστεί αρχεία έως 1 GB χωρίς να φορτώνει ολόκληρο το έγγραφο στη μνήμη, διατηρώντας την απόδοση. Χρησιμοποιώντας άδεια με μέτρηση πληρώνετε μόνο για τις λειτουργίες που εκτελείτε πραγματικά, επιτρέποντας στην λύση να κλιμακώνεται οικονομικά ενώ διατηρεί πλήρη πρόσβαση σε όλες τις δυνατότητες. + +## Προαπαιτούμενα +- **GroupDocs.Watermark for Java** έκδοση 24.11 ή νεότερη. +- Ένα Java Development Kit (JDK) 8 ή νεότερο εγκατεστημένο και ρυθμισμένο. +- Βασική εξοικείωση με Maven ή χειροκίνητη διαχείριση JAR. +- Ένα προσωρινό ή μόνιμο κλειδί άδειας από το portal του GroupDocs. + +## Πώς να ορίσετε άδεια με μέτρηση για το GroupDocs Watermark σε Java; + +Φορτώστε τα δημόσια και ιδιωτικά κλειδιά σας, δημιουργήστε μια παρουσία `Metered`, και εφαρμόστε την άδεια—όλα σε τρία σύντομα βήματα. Αυτή η προσέγγιση εγγυάται ότι κάθε αίτημα υδατογραφήματος μετράται έναντι του λογαριασμού σας, παρέχοντάς σας πλήρη διαφάνεια στην κατανάλωση. + +### Βήμα 1: Ορίστε τα δημόσια και ιδιωτικά κλειδιά +Εισάγετε τα κλειδιά που λάβατε μετά την εγγραφή για προσωρινή άδεια. + +`Metered` είναι η κλάση του GroupDocs.Watermark που διαχειρίζεται την άδεια με μέτρηση και την παρακολούθηση χρήσης. +*Τοποθετήστε τα κλειδιά σας σε ασφαλή θέση (μεταβλητές περιβάλλοντος, κρυπτογραφημένο αρχείο ρυθμίσεων κ.λπ.) πριν τα χρησιμοποιήσετε στον κώδικα.* + +### Βήμα 2: Δημιουργήστε μια παρουσία της κλάσης Metered +Δημιουργήστε το αντικείμενο `Metered` με τα κλειδιά σας. Αυτό το αντικείμενο θα περάσει στη μηχανή υδατογραφήματος κατά την αρχικοποίηση. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Βήμα 3: Ορίστε την άδεια με μέτρηση χρησιμοποιώντας τα παρεχόμενα κλειδιά +Καλέστε τη μέθοδο `setLicense` (ή το αντίστοιχο API) με τα δημόσια και ιδιωτικά κλειδιά. Μόλις οριστεί, όλες οι επόμενες λειτουργίες υδατογραφήματος θα χρεώνονται σύμφωνα με τη χρήση σας. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Συμβουλή:** Κρατήστε τα κλειδιά εκτός ελέγχου πηγαίου κώδικα. Χρησιμοποιήστε διαχειριστή μυστικών ή κρυπτογραφημένο αρχείο ιδιοτήτων για να αποφύγετε τυχαία έκθεση. + +## Ρύθμιση του GroupDocs.Watermark για Java + +### Πληροφορίες Εγκατάστασης + +Ενσωματώστε το GroupDocs.Watermark στο έργο σας χρησιμοποιώντας Maven ή κατεβάζοντας το JAR απευθείας. + +**Διαμόρφωση Maven:** +Προσθέστε την ακόλουθη διαμόρφωση στο αρχείο `pom.xml` σας: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Άμεση Λήψη:** +Κατεβάστε την τελευταία έκδοση από [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Απόκτηση Άδειας + +Για να ξεκλειδώσετε πλήρη λειτουργικότητα, αποκτήστε μια δωρεάν δοκιμαστική ή προσωρινή άδεια: + +- Εγγραφείτε στον [GroupDocs website](https://purchase.groupdocs.com/temporary-license/) για να ξεκινήσετε. +- Αφού αποκτήσετε τα κλειδιά σας, ενσωματώστε τα στο έργο σας όπως φαίνεται στον οδηγό υλοποίησης. + +### Βασική Αρχικοποίηση και Ρύθμιση + +Μόλις το SDK προστεθεί στο έργο σας, εισάγετε τα απαραίτητα namespaces και δημιουργήστε την παρουσία της μηχανής υδατογραφήματος όπως φαίνεται στα παραπάνω αποσπάσματα κώδικα. + +## Συμβουλές Επίλυσης Προβλημάτων +- **Μη έγκυρα κλειδιά:** Ελέγξτε ξανά ότι τα δημόσια και ιδιωτικά κλειδιά ταιριάζουν ακριβώς· ένα μόνο τυπογραφικό λάθος θα εμποδίσει την ενεργοποίηση. +- **Σφάλματα διαδρομής αρχείου άδειας:** Εάν προτιμάτε άδεια με βάση το αρχείο, βεβαιωθείτε ότι η διαδρομή του αρχείου είναι απόλυτη ή σωστά επιλυμένη σε σχέση με τον τρέχοντα φάκελο εργασίας. +- **Προβλήματα δικτύου:** Η άδεια με μέτρηση απαιτεί εξερχόμενες κλήσεις HTTPS· βεβαιωθείτε ότι το τείχος προστασίας επιτρέπει την κίνηση προς `api.groupdocs.com`. + +## Πρακτικές Εφαρμογές +1. **Ασφάλεια Εγγράφων:** Προσθέστε ορατά ή αόρατα υδατογραφήματα σε PDF, έγγραφα Word και εικόνες για την προστασία ευαίσθητων εταιρικών δεδομένων. +2. **Παρακολούθηση Χρήσης:** Δημιουργήστε αναφορές για το πόσα έγγραφα έχουν υδατογραφηθεί ανά ημέρα, χρήσιμο για προϋπολογισμό και συμμόρφωση. +3. **Ενσωμάτωση CMS:** Αυτοματοποιήστε την εισαγωγή υδατογραφήματος κατά τη διαδικασία δημοσίευσης περιεχομένου, με την άδεια να επιβάλλεται αυτόματα. + +## Σκέψεις Απόδοσης + +**Βελτιστοποίηση Απόδοσης:** +- Εφαρμόζετε υδατογραφήματα μόνο όταν είναι απαραίτητο· παραλείψτε την επεξεργασία αρχείων που είναι ήδη προστατευμένα. +- Για μεγάλες παρτίδες, επαναχρησιμοποιήστε την ίδια παρουσία `WatermarkEngine` ώστε να αποφύγετε επαναλαμβανόμενο κόστος αρχικοποίησης. + +**Καλές Πρακτικές:** +- Παρακολουθείτε τη χρήση heap της JVM κατά την επεξεργασία PDF πολλών εκατοντάδων σελίδων· εξετάστε τις streaming APIs εάν η μνήμη γίνεται bottleneck. +- Ενεργοποιήστε την καταγραφή στο επίπεδο `INFO` για να συλλαμβάνετε κλήσεις αδειών χωρίς να κατακλύζετε την κονσόλα. + +## Συμπέρασμα + +Σε αυτόν τον οδηγό καλύψαμε **πώς να ορίσετε άδεια** για το GroupDocs.Watermark σε Java, από την εγκατάσταση μέσω Maven μέχρι τη διαμόρφωση κλειδιού μέτρησης. Ακολουθώντας τα βήματα, αποκτάτε ακριβή παρακολούθηση χρήσης, ευέλικτη τιμολόγηση και ισχυρή προστασία εγγράφων—όλα χωρίς να θυσιάζετε την απόδοση. + +**Επόμενα Βήματα:** +- Πειραματιστείτε με διαφορετικά στυλ υδατογραφήματος (κείμενο, εικόνα, διαγώνιο). +- Εξερευνήστε προχωρημένες δυνατότητες όπως υπό όρους υδατογραφήματα βάσει ρόλων χρηστών. +- Επισκεφθείτε τον πίνακα αναλύσεων του GroupDocs για να παρακολουθείτε τις τάσεις κατανάλωσης. + +Έτοιμοι να ασφαλίσετε τα έγγραφά σας; Εφαρμόστε τη λύση σήμερα και απολαύστε την ηρεμία που προσφέρει η προστασία των περιουσιακών σας στοιχείων και η διαφάνεια του κόστους αδειών. + +## Συχνές Ερωτήσεις + +**Q: Ποια είναι η διαφορά μεταξύ προσωρινής και μόνιμης άδειας;** +A: Μια προσωρινή άδεια είναι περιορισμένη χρονικά και ιδανική για αξιολόγηση, ενώ μια μόνιμη άδεια παρέχει απεριόριστη χρήση χωρίς επαναλαμβανόμενα κόστη. + +**Q: Μπορώ να μεταβώ από άδεια με μέτρηση σε μόνιμη χωρίς αλλαγές κώδικα;** +A: Ναι—απλώς αντικαταστήστε την αρχικοποίηση κλειδιού μέτρησης με κλήση `engine.setLicense("path/to/license/file")`. + +**Q: Τι συμβαίνει αν η υπηρεσία μέτρησης είναι μη προσβάσιμη;** +A: Το SDK μεταβαίνει σε offline λειτουργία· η υδτογράφηση συνεχίζεται, αλλά η χρήση δεν θα αναφερθεί μέχρι να επανέλθει η σύνδεση. + +**Q: Υπάρχουν όρια μεγέθους αρχείου για το υδατογράφημα;** +A: Το SDK μπορεί να επεξεργαστεί αρχεία έως 1 GB· μεγαλύτερα αρχεία πρέπει να χωριστούν ή να επεξεργαστούν σε streaming λειτουργία. + +**Q: Λειτουργεί η άδεια με μέτρηση σε όλα τα λειτουργικά συστήματα;** +A: Λειτουργεί σε οποιαδήποτε πλατφόρμα υποστηρίζει Java 8+, συμπεριλαμβανομένων Windows, Linux και macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Resources** + +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Σχετικά Μαθήματα + +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/greek/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/greek/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..07921854f --- /dev/null +++ b/content/greek/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Μάθετε πώς να προσθέτετε υδατογράφημα σε PDF με Java προσθέτοντας κείμενο + ως υδατογράφημα σε σχολιασμούς εικόνας PDF χρησιμοποιώντας το GroupDocs.Watermark, + προστατεύοντας τα έγγραφά σας αποτελεσματικά. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Προσθήκη υδατογραφήματος σε PDF με Java προσθέτοντας κείμενο ως υδατογράφημα + σε σχολιασμούς εικόνας PDF με το GroupDocs.Watermark. Ασφαλίστε τα έγγραφά σας γρήγορα + και αξιόπιστα. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF σε Java – Προσθήκη κειμένου σε σχολιασμούς εικόνας +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF σε Java – Προσθήκη κειμένου σε σχολιασμούς εικόνας +type: docs +url: /el/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Υδατογράφημα PDF σε Java – Προσθήκη κειμένου σε εικόνες σχολίων + +Η προστασία των αρχείων PDF από μη εξουσιοδοτημένη διανομή αποτελεί καθημερινή ανησυχία για τους προγραμματιστές. **Watermark PDF Java** σας επιτρέπει να ενσωματώσετε ορατό κείμενο απευθείας σε εικόνες σχολίων, διασφαλίζοντας ότι κάθε σελίδα φέρει το σήμα ή την ειδοποίηση εμπιστευτικότητας σας. Σε αυτό το σεμινάριο θα δείτε γιατί αυτή η προσέγγιση είναι αξιόπιστη, τι χρειάζεστε για να ξεκινήσετε και μια υλοποίηση βήμα‑βήμα χρησιμοποιώντας το GroupDocs.Watermark για Java. + +## Γρήγορες Απαντήσεις +- **Τι κάνει η βιβλιοθήκη;** Προσθέτει, επεξεργάζεται ή αφαιρεί υδατογραφήματα σε PDF, Word, Excel και αρχεία εικόνας. +- **Ποια κύρια μέθοδος δημιουργεί το υδατογράφημα;** `Watermark.add()` εφαρμόζεται σε ένα αντικείμενο `Annotation`. +- **Χρειάζομαι άδεια για ανάπτυξη;** Μια δωρεάν δοκιμή λειτουργεί για δοκιμές· απαιτείται μόνιμη άδεια για παραγωγή. +- **Μπορώ να επεξεργαστώ μεγάλα PDF;** Ναι – το API μεταδίδει τις σελίδες, διαχειριζόμενο αρχεία > 500 MB χωρίς να φορτώνει ολόκληρο το έγγραφο στη μνήμη. +- **Είναι η λύση ασφαλής για νήματα (thread‑safe);** Όλες οι δημόσιες μέθοδοι είναι χωρίς κατάσταση, έτσι μπορείτε να εκτελείτε με ασφάλεια πολλαπλές παρουσίες ταυτόχρονα. + +## Τι είναι το watermark pdf java; +`watermark pdf java` αναφέρεται στη δυνατότητα προσθήκης οπτικών υδατογραφημάτων σε έγγραφα PDF από κώδικα Java, συνήθως χρησιμοποιώντας μια βιβλιοθήκη όπως το GroupDocs.Watermark. Βοηθά στην επιβολή ιδιοκτησίας, εμπιστευτικότητας ή σήμανσης απευθείας μέσα στο αρχείο, διατηρώντας την αρχική διάταξη και επιτρέποντας λεπτομερή έλεγχο της εμφάνισης και της τοποθέτησης. + +## Γιατί να χρησιμοποιήσετε το GroupDocs.Watermark για Java; +Το GroupDocs.Watermark υποστηρίζει **50+ μορφές εισόδου και εξόδου**, επεξεργάζεται PDF πολλών εκατοντάδων σελίδων σε λιγότερο από 2 δευτερόλεπτα σε τυπικό υλικό, και δεν απαιτεί εγκατεστημένο πλήρες πρόγραμμα προβολής PDF. Η μηχανή του που είναι ενήμερη για σχόλια διατηρεί την αρχική διάταξη ενώ εισάγει κειμενικά υδατογραφήματα με ρυθμιζόμενη αδιαφάνεια, περιστροφή και στυλ γραμματοσειράς, καθιστώντας το μια γρήγορη, αξιόπιστη επιλογή για επιχειρησιακό υδατογράφημα. + +## Προαπαιτούμενα +- **Java Development Kit (JDK)** 8 ή νεότερο. +- **Maven** (ή χειροκίνητη ένταξη JAR) για διαχείριση εξαρτήσεων. +- Βασική εξοικείωση με τη δομή PDF και τις έννοιες προγραμματισμού Java. + +## Ποια είναι τα προαπαιτούμενα για υδατογράφημα PDF σε Java; +Χρειάζεστε ένα συμβατό JDK, Maven (ή τα αρχεία JAR) και μια έγκυρη άδεια GroupDocs.Watermark. Η βιβλιοθήκη λειτουργεί σε οποιοδήποτε λειτουργικό σύστημα που υποστηρίζει Java 8+, και λειτουργεί με Java 11, 17 και νεότερες εκδόσεις LTS. Επιπλέον, βεβαιωθείτε ότι το έργο σας διαθέτει επαρκή μνήμη heap (τουλάχιστον 2 GB) για την επεξεργασία μεγάλων PDF και ότι έχετε δικαιώματα εγγραφής στον φάκελο εξόδου. + +## Ρύθμιση του GroupDocs.Watermark για Java +Πριν γράψετε κώδικα, προσθέστε τη βιβλιοθήκη στο έργο σας. + +### Ρύθμιση Maven +Προσθέστε τα παρακάτω στο αρχείο `pom.xml` σας: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Άμεση Λήψη +Εναλλακτικά, κατεβάστε την τελευταία έκδοση από [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Απόκτηση Άδειας +- **Free Trial** – εξερευνήστε τις βασικές λειτουργίες δωρεάν. +- **Temporary License** – ξεκλειδώστε όλες τις δυνατότητες κατά την ανάπτυξη. +- **Purchase** – αποκτήστε μόνιμη άδεια για χρήση σε παραγωγή και premium υποστήριξη. + +### Βασική Αρχικοποίηση +`Watermark` είναι η κλάση εισόδου που φορτώνει ένα έγγραφο, εφαρμόζει αντικείμενα υδατογραφήματος και αποθηκεύει το αποτέλεσμα. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Πώς να προσθέσετε κειμενικό υδατογράφημα σε εικόνες σχολίων PDF χρησιμοποιώντας το GroupDocs.Watermark για Java; +`Watermark.load()` φορτώνει ένα έγγραφο PDF στο Watermark API για επεξεργασία. `TextWatermark` αντιπροσωπεύει ένα κειμενικό υδατογράφημα με προσαρμόσιμη γραμματοσειρά, μέγεθος, χρώμα, αδιαφάνεια και περιστροφή. `ImageAnnotation` είναι ένα σχόλιο PDF που περιέχει ενσωματωμένη εικόνα, η οποία μπορεί να στοχευθεί για υδατογράφημα. `annotation.addWatermark()` προσθέτει το δημιουργημένο υδατογράφημα στο σχόλιο, και `watermark.save()` γράφει το τροποποιημένο έγγραφο στην καθορισμένη διαδρομή. + +Φορτώστε το PDF σας με `Watermark.load("sample.pdf")`, δημιουργήστε μια παρουσία `TextWatermark`, επαναλάβετε για κάθε `ImageAnnotation` και καλέστε `annotation.addWatermark(textWatermark)`. Τέλος, αποθηκεύστε το τροποποιημένο έγγραφο με `watermark.save("output.pdf")`. Αυτή η σύντομη ροή διαχειρίζεται οποιονδήποτε αριθμό σχολίων σε μία μόνο διέλευση και διατηρεί τα αρχικά μεταδεδομένα των σχολίων. + +### Προσθήκη Κειμενικού Υδατογραφήματος σε Εικόνες Σχολίων PDF +Οι παρακάτω ενότητες εξηγούν κάθε βήμα. + +#### Βήμα 1: Φόρτωση του Εγγράφου PDF +Ανοίξτε το στοχευόμενο αρχείο PDF ώστε το API να μπορεί να εξετάσει τα αντικείμενα σχολίων του. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Βήμα 2: Δημιουργία του Κειμενικού Υδατογραφήματος +`TextWatermark` αντιπροσωπεύει ένα κειμενικό υδατογράφημα με προσαρμόσιμη γραμματοσειρά, μέγεθος, χρώμα, αδιαφάνεια και περιστροφή. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Βήμα 3: Εφαρμογή του Υδατογραφήματος στα Σχόλια +`ImageAnnotation` είναι ένα σχόλιο PDF που περιέχει ενσωματωμένη εικόνα, η οποία μπορεί να στοχευθεί για υδατογράφημα. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Βήμα 4: Αποθήκευση του Υδατογραφημένου PDF +`watermark.save()` γράφει το τροποποιημένο έγγραφο στην καθορισμένη διαδρομή. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Συχνά Προβλήματα και Λύσεις +- **Missing Dependencies** – Επαληθεύστε ότι όλα τα αντικείμενα GroupDocs αναφέρονται στο `pom.xml`. +- **File Path Issues** – Χρησιμοποιήστε απόλυτες διαδρομές ή `Paths.get()` για να αποφύγετε εκπλήξεις σχετικές με σχετικές διαδρομές. +- **Unsupported Annotation Types** – Το API αυτή τη στιγμή διαχειρίζεται `ImageAnnotation`, `TextAnnotation` και `StampAnnotation`; άλλοι τύποι απαιτούν προσαρμοσμένη διαχείριση. + +## Πρακτικές Εφαρμογές +Η προσθήκη κειμενικού υδατογραφήματος σε εικόνες σχολίων PDF είναι ιδιαίτερα χρήσιμη για: +1. **Legal Documents** – Σημειώστε συμβάσεις με «Confidential – For Internal Use Only». +2. **Confidential Reports** – Αποτρέψτε τυχαίες διαρροές ενσωματώνοντας μια ετικέτα σε όλη την εταιρεία. +3. **Marketing Materials** – Προωθήστε τα PDF με ένα διακριτικό λογότυπο‑κειμενικό επικάλυψη. +4. **Academic Drafts** – Δείξτε «Draft – Do Not Distribute» σε ερευνητικές εργασίες πριν από την αξιολόγηση. + +## Σκέψεις για την Απόδοση +- **Batch Processing** – Ομαδοποιήστε πολλά PDF σε μια ενιαία ομάδα νημάτων για ελαχιστοποίηση του κόστους JVM. +- **Memory Management** – Η βιβλιοθήκη μεταδίδει τις σελίδες, οπότε εκχωρήστε τουλάχιστον 2 GB heap για αρχεία μεγαλύτερα από 200 MB. +- **Watermark Settings** – Μειώστε την αδιαφάνεια (π.χ., 30 %) για να μειώσετε το οπτικό άγχος ενώ παραμένει ανιχνεύσιμο. + +## Συχνές Ερωτήσεις + +**Q: Μπορώ να προσθέσω υδατογραφήματα σε άλλους τύπους σχολίων;** +A: Ναι, μπορείτε να στοχεύσετε `TextAnnotation`, `StampAnnotation` ή προσαρμοσμένα αντικείμενα σχολίων χρησιμοποιώντας την ίδια μέθοδο `addWatermark`. + +**Q: Υπάρχει όριο στον αριθμό των υδατογραφημάτων που μπορώ να τοποθετήσω σε μια σελίδα;** +A: Δεν υπάρχει σκληρό όριο, αλλά διατηρήστε τη συνολική αδιαφάνεια κάτω από 70 % για να διατηρήσετε την αναγνωσιμότητα και να αποφύγετε την υποβάθμιση της απόδοσης. + +**Q: Πώς να αφαιρέσω ένα υδατογράφημα μετά την εφαρμογή του;** +A: Χρησιμοποιήστε `annotation.removeWatermark(watermarkId)` ή καλέστε `Watermark.removeAll()` για να αφαιρέσετε όλα τα υδατογραφήματα από το έγγραφο. + +**Q: Η βιβλιοθήκη διαχειρίζεται PDF με κωδικό πρόσβασης;** +A: Ναι – δώστε τον κωδικό πρόσβασης κατά τη φόρτωση του εγγράφου: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Ποιο είναι το μέγιστο μέγεθος αρχείου που υποστηρίζεται;** +A: Το API μπορεί να επεξεργαστεί αρχεία έως 2 GB σε 64‑bit JVM· μεγαλύτερα αρχεία θα πρέπει να χωριστούν σε τμήματα πριν το υδατογράφημα. + +## Πόροι +- [Τεκμηρίωση GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Αναφορά API](https://reference.groupdocs.com/watermark/java) +- [Λήψη GroupDocs.Watermark για Java](https://releases.groupdocs.com/watermark/java/) +- [Αποθετήριο GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Δωρεάν Φόρουμ Υποστήριξης](https://forum.groupdocs.com/c/watermark/10) +- [Αίτηση για Προσωρινή Άδεια](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Τελευταία Ενημέρωση:** 2026-07-30 +**Δοκιμή Με:** GroupDocs.Watermark 23.9 for Java +**Συγγραφέας:** GroupDocs + +## Σχετικά Μαθήματα + +- [Πώς να Προσθέσετε Κειμενικό Υδατογράφημα σε PDF Χρησιμοποιώντας το GroupDocs.Watermark για Java (Οδηγός 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Πώς να Προσθέσετε Κείμενο και Εικόνα Υδατογραφήματα σε Συγκεκριμένες Σελίδες PDF Χρησιμοποιώντας το GroupDocs.Watermark για Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Πρόσβαση και Επανάληψη σε PDF Artifacts Χρησιμοποιώντας το GroupDocs.Watermark σε Java για Υδατογράφημα Εγγράφων](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/hindi/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/hindi/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..a873d7d2c --- /dev/null +++ b/content/hindi/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Java में GroupDocs.Watermark के लिए लाइसेंस सेट करना सीखें, अपने दस्तावेज़ों + को प्रभावी ढंग से सुरक्षित रखें और उपयोग को कुशलता से प्रबंधित करें। +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Java में GroupDocs.Watermark के लिए लाइसेंस कैसे सेट करें। यह गाइड + आपको SDK स्थापित करने, मेटर्ड की प्राप्त करने, और अपने दस्तावेज़ों को सुरक्षित करने + के लिए लाइसेंस कॉन्फ़िगर करने की प्रक्रिया में मार्गदर्शन करता है। +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Java में GroupDocs Watermark के लिए लाइसेंस कैसे सेट करें +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Java में GroupDocs Watermark के लिए लाइसेंस कैसे सेट करें +type: docs +url: /hi/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# GroupDocs Watermark के लिए Java में लाइसेंस कैसे सेट करें + +आधुनिक एप्लिकेशनों के लिए बौद्धिक संपदा की सुरक्षा शीर्ष प्राथमिकता है, और वॉटरमार्क अनधिकृत वितरण को रोकने का एक सिद्ध तरीका है। यदि आप **GroupDocs.Watermark for Java** का उपयोग कर रहे हैं, तो आपको एक लाइसेंस की आवश्यकता होगी जो उपयोग को ट्रैक कर सके और मांग के साथ स्केल हो सके। यह ट्यूटोरियल **GroupDocs.Watermark के लिए Java में लाइसेंस कैसे सेट करें** को समझाता है, SDK को इंस्टॉल करने से लेकर मेटर्ड की को कॉन्फ़िगर करने तक जो उपयोग को सेवा पर रिपोर्ट करता है। + +## त्वरित उत्तर +- **मीटरड लाइसेंस क्या है?** यह एक उपयोग‑आधारित लाइसेंस है जो प्रत्येक API कॉल को रिकॉर्ड करता है, जिससे आप केवल उपयोग के अनुसार भुगतान करते हैं। +- **क्या पहले ट्रायल चाहिए?** हाँ, आप उत्पाद का मूल्यांकन करने के लिए GroupDocs साइट से एक अस्थायी लाइसेंस का अनुरोध कर सकते हैं। +- **कौन सा Java संस्करण आवश्यक है?** Java 8 या नया; SDK JDK 8+ के लिए कंपाइल किया गया है। +- **क्या बाद में पर्मेनेन्ट लाइसेंस में स्विच कर सकते हैं?** बिल्कुल – केवल मीटरड कुंजियों को स्थायी लाइसेंस फ़ाइल से बदल दें। +- **क्या सेटअप Maven के साथ संगत है?** हाँ, निर्भरताओं के सहज प्रबंधन के लिए Maven कोऑर्डिनेट्स प्रदान किए गए हैं। + +## GroupDocs Watermark के लिए मीटरड लाइसेंस क्या है? +मीटरड लाइसेंस GroupDocs द्वारा प्रदान किया गया एक क्लाउड‑सक्षम एंटाइटलमेंट है जो SDK द्वारा किए गए प्रत्येक वॉटरमार्किंग ऑपरेशन को रिकॉर्ड करता है। प्रत्येक API कॉल GroupDocs के लाइसेंसिंग सर्वर पर लॉग होती है, जिससे वास्तविक उपयोग के आधार पर पे‑एज़‑यू‑गो बिलिंग संभव होती है। यह मॉडल डेवलपर्स को वास्तविक‑समय में उपभोग की जानकारी देता है और लागत नियंत्रण में मदद करता है, जबकि सभी फीचर्स की पूरी पहुँच सुनिश्चित करता है। + +## GroupDocs Watermark के साथ मीटरड लाइसेंस क्यों उपयोग करें? +GroupDocs.Watermark पचास से अधिक इनपुट और आउटपुट फ़ॉर्मेट्स—जैसे PDF, DOCX, PPTX, और विभिन्न इमेज टाइप्स—को सपोर्ट करता है और 1 GB तक की फ़ाइलों को पूरी डॉक्यूमेंट को मेमोरी में लोड किए बिना प्रोसेस कर सकता है, जिससे प्रदर्शन बना रहता है। मीटरड लाइसेंस का उपयोग करके आप केवल उन ऑपरेशन्स के लिए भुगतान करते हैं जो आप वास्तव में चलाते हैं, जिससे समाधान लागत‑प्रभावी तरीके से स्केल करता है और सभी फीचर्स की पूरी पहुँच बनी रहती है। + +## पूर्वापेक्षाएँ +- **GroupDocs.Watermark for Java** संस्करण 24.11 या बाद का। +- स्थापित और कॉन्फ़िगर किया गया Java Development Kit (JDK) 8 या नया। +- Maven या मैनुअल JAR प्रबंधन की बुनियादी समझ। +- GroupDocs पोर्टल से प्राप्त अस्थायी या स्थायी लाइसेंस कुंजी। + +## Java में GroupDocs Watermark के लिए मीटरड लाइसेंस कैसे सेट करें? + +सार्वजनिक और निजी कुंजियों को लोड करें, एक `Metered` इंस्टेंस बनाएं, और लाइसेंस लागू करें—तीन संक्षिप्त चरणों में। यह तरीका सुनिश्चित करता है कि हर वॉटरमार्किंग अनुरोध आपके खाते के खिलाफ गिना जाए, जिससे उपभोग की पूरी दृश्यता मिलती है। + +### चरण 1: सार्वजनिक और निजी कुंजियों को परिभाषित करें +अस्थायी लाइसेंस के लिए रजिस्टर करने के बाद प्राप्त कुंजियों को दर्ज करें। + +`Metered` GroupDocs.Watermark क्लास है जो मीटरड लाइसेंसिंग और उपयोग ट्रैकिंग को संभालता है। +*कोड में उपयोग करने से पहले अपनी कुंजियों को सुरक्षित स्थान (पर्यावरण वेरिएबल्स, एन्क्रिप्टेड कॉन्फ़िग, आदि) में रखें।* + +### चरण 2: Metered क्लास का एक इंस्टेंस बनाएं +अपनी कुंजियों के साथ `Metered` ऑब्जेक्ट को इंस्टैंशिएट करें। यह ऑब्जेक्ट इनिशियलाइज़ेशन के दौरान वॉटरमार्क इंजन को पास किया जाएगा। + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### चरण 3: प्रदान की गई कुंजियों का उपयोग करके मीटरड लाइसेंस सेट करें +`setLicense` मेथड (या समकक्ष API कॉल) को अपनी सार्वजनिक और निजी कुंजियों के साथ कॉल करें। सेट होने के बाद सभी बाद के वॉटरमार्क ऑपरेशन्स आपके उपयोग के अनुसार बिल किए जाएंगे। + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **प्रो टिप:** कुंजियों को सोर्स कंट्रोल से बाहर रखें। आकस्मिक एक्सपोज़र से बचने के लिए सीक्रेट्स मैनेजर या एन्क्रिप्टेड प्रॉपर्टीज़ फ़ाइल का उपयोग करें। + +## Java के लिए GroupDocs.Watermark सेटअप + +### स्थापना जानकारी + +Maven के माध्यम से या सीधे JAR डाउनलोड करके GroupDocs.Watermark को अपने प्रोजेक्ट में इंटीग्रेट करें। + +**Maven सेटअप:** +अपने `pom.xml` फ़ाइल में निम्न कॉन्फ़िगरेशन जोड़ें: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**सीधा डाउनलोड:** +नवीनतम संस्करण [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) से डाउनलोड करें। + +### लाइसेंस प्राप्ति + +पूर्ण कार्यक्षमता अनलॉक करने के लिए, एक मुफ्त ट्रायल या अस्थायी लाइसेंस प्राप्त करें: + +- शुरू करने के लिए [GroupDocs वेबसाइट](https://purchase.groupdocs.com/temporary-license/) पर साइन अप करें। +- कुंजियों को प्राप्त करने के बाद, उन्हें इम्प्लीमेंटेशन गाइड में दिखाए अनुसार अपने प्रोजेक्ट में इंटीग्रेट करें। + +### बेसिक इनिशियलाइज़ेशन और सेटअप + +एक बार SDK आपके प्रोजेक्ट में जोड़ने के बाद, आवश्यक नेमस्पेसेस इम्पोर्ट करें और ऊपर दिखाए कोड स्निपेट्स के अनुसार वॉटरमार्क इंजन इंस्टेंस बनाएं। + +## समस्या निवारण टिप्स +- **अमान्य कुंजियां:** सार्वजनिक और निजी कुंजियों की सटीक मिलान दोबारा जांचें; एक भी टाइपो एक्टिवेशन को रोक देगा। +- **लाइसेंस फ़ाइल पाथ त्रुटियां:** यदि आप फ़ाइल‑आधारित लाइसेंस पसंद करते हैं, तो फ़ाइल पाथ को एब्सोल्यूट रखें या वर्किंग डायरेक्टरी के सापेक्ष सही ढंग से रिजॉल्व करें। +- **नेटवर्क समस्याएं:** मीटरड लाइसेंसिंग को आउटबाउंड HTTPS कॉल्स की आवश्यकता होती है; सुनिश्चित करें कि आपका फ़ायरवॉल `api.groupdocs.com` पर ट्रैफ़िक की अनुमति देता है। + +## व्यावहारिक अनुप्रयोग +1. **डॉक्यूमेंट सुरक्षा:** संवेदनशील कॉर्पोरेट डेटा की रक्षा के लिए PDFs, Word डॉक्यूमेंट्स और इमेजेज़ में दृश्यमान या अदृश्य वॉटरमार्क जोड़ें। +2. **उपयोग ट्रैकिंग:** प्रतिदिन कितनी डॉक्यूमेंट्स वॉटरमार्क की गईं, इस पर रिपोर्ट जनरेट करें, जो बजटिंग और कंप्लायंस के लिए उपयोगी है। +3. **CMS इंटीग्रेशन:** कंटेंट पब्लिशिंग वर्कफ़्लो के दौरान वॉटरमार्क इन्सर्शन को ऑटोमेट करें, लाइसेंसिंग स्वचालित रूप से लागू होगी। + +## प्रदर्शन विचार + +**प्रदर्शन अनुकूलन:** +- केवल आवश्यक होने पर ही वॉटरमार्क लागू करें; पहले से संरक्षित फ़ाइलों को स्किप करें। +- बड़े बैच के लिए समान `WatermarkEngine` इंस्टेंस को पुनः उपयोग करें ताकि बार‑बार इनिशियलाइज़ेशन ओवरहेड से बचा जा सके। + +**सर्वोत्तम प्रथाएँ:** +- कई‑सौ‑पेज PDFs प्रोसेस करते समय JVM हीप उपयोग को मॉनीटर करें; मेमोरी बॉटलनेक होने पर स्ट्रीमिंग API पर विचार करें। +- लाइसेंसिंग कॉल्स को कैप्चर करने के लिए `INFO` लेवल पर लॉगिंग सक्षम करें, बिना कंसोल को ओवरलोड किए। + +## निष्कर्ष + +इस गाइड में हमने **GroupDocs.Watermark के लिए Java में लाइसेंस कैसे सेट करें** को Maven इंस्टॉलेशन से लेकर मीटरड की कॉन्फ़िगरेशन तक कवर किया। चरणों का पालन करके आप सटीक उपयोग ट्रैकिंग, लचीला बिलिंग, और मजबूत डॉक्यूमेंट प्रोटेक्शन प्राप्त करते हैं—बिना प्रदर्शन से समझौता किए। + +**अगले कदम:** +- विभिन्न वॉटरमार्क स्टाइल (टेक्स्ट, इमेज, डायगोनल) के साथ प्रयोग करें। +- उपयोगकर्ता भूमिकाओं के आधार पर कंडीशनल वॉटरमार्क जैसी उन्नत सुविधाओं का अन्वेषण करें। +- उपभोग ट्रेंड मॉनीटर करने के लिए GroupDocs एनालिटिक्स डैशबोर्ड देखें। + +क्या आप अपने डॉक्यूमेंट्स को सुरक्षित करने के लिए तैयार हैं? आज ही समाधान लागू करें और यह शांति महसूस करें कि आपके एसेट्स संरक्षित हैं और लाइसेंसिंग लागतें पारदर्शी हैं। + +## अक्सर पूछे जाने वाले प्रश्न + +**प्रश्न: अस्थायी और पर्मेनेन्ट लाइसेंस में क्या अंतर है?** +उत्तर: अस्थायी लाइसेंस समय‑सीमित होता है और मूल्यांकन के लिए आदर्श है, जबकि पर्मेनेन्ट लाइसेंस बिना पुनरावर्ती शुल्क के अनलिमिटेड उपयोग प्रदान करता है। + +**प्रश्न: क्या मीटरड लाइसेंस से पर्मेनेन्ट लाइसेंस में कोड बदलें बिना स्विच किया जा सकता है?** +उत्तर: हाँ—मीटरड की इनिशियलाइज़ेशन को `engine.setLicense("path/to/license/file")` कॉल से बदल दें। + +**प्रश्न: यदि मीटरड सेवा पहुंच योग्य नहीं है तो क्या होगा?** +उत्तर: SDK ऑफ़लाइन मोड में फॉल्बैक करता है; वॉटरमार्किंग जारी रहती है लेकिन उपयोग रिपोर्ट तब तक नहीं भेजी जाएगी जब तक कनेक्टिविटी पुनः स्थापित नहीं होती। + +**प्रश्न: वॉटरमार्किंग के लिए फ़ाइल‑साइज़ सीमाएँ क्या हैं?** +उत्तर: SDK 1 GB तक की फ़ाइलें संभाल सकता है; बड़ी फ़ाइलों को विभाजित या स्ट्रीमिंग मोड में प्रोसेस करना चाहिए। + +**प्रश्न: क्या मीटरड लाइसेंस सभी ऑपरेटिंग सिस्टम पर काम करता है?** +उत्तर: यह किसी भी प्लेटफ़ॉर्म पर काम करता है जो Java 8+ सपोर्ट करता है, जिसमें Windows, Linux, और macOS शामिल हैं। + +--- + +**अंतिम अपडेट:** 2026-07-30 +**टेस्टेड विथ:** GroupDocs.Watermark 24.11 for Java +**लेखक:** GroupDocs + +**संसाधन** + +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## संबंधित ट्यूटोरियल + +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/hindi/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/hindi/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..28c69d003 --- /dev/null +++ b/content/hindi/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: GroupDocs.Watermark का उपयोग करके PDF इमेज एनोटेशन में टेक्स्ट वॉटरमार्क + जोड़कर Java में PDF पर वॉटरमार्क कैसे करें, सीखें और अपने दस्तावेज़ों को प्रभावी + रूप से सुरक्षित रखें। +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: GroupDocs.Watermark के साथ PDF इमेज एनोटेशन में टेक्स्ट वॉटरमार्क + जोड़कर Java में PDF पर वॉटरमार्क करें। अपने दस्तावेज़ों को तेज़ और भरोसेमंद तरीके + से सुरक्षित रखें। +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Java में PDF पर वॉटरमार्क – इमेज एनोटेशन में टेक्स्ट जोड़ें +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Java में PDF पर वॉटरमार्क – इमेज एनोटेशन में टेक्स्ट जोड़ें +type: docs +url: /hi/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# जावा में PDF पर वॉटरमार्क – इमेज एनोटेशन में टेक्स्ट जोड़ें + +PDF फ़ाइलों को अनधिकृत वितरण से बचाना डेवलपर्स के लिए दैनिक चिंता का विषय है। **Watermark PDF Java** आपको इमेज एनोटेशन पर सीधे दृश्यमान टेक्स्ट एम्बेड करने देता है, जिससे हर पृष्ठ पर आपका ब्रांडिंग या गोपनीयता नोटिस रहता है। इस ट्यूटोरियल में आप देखेंगे कि यह तरीका क्यों विश्वसनीय है, शुरू करने के लिए क्या चाहिए, और GroupDocs.Watermark for Java का उपयोग करके चरण‑दर‑चरण कार्यान्वयन। + +## त्वरित उत्तर +- **लाइब्रेरी क्या करती है?** यह PDFs, Word, Excel, और इमेज फ़ाइलों पर वॉटरमार्क जोड़ती, संपादित करती या हटाती है। +- **वॉटरमार्क बनाने वाली मुख्य मेथड कौन सी है?** `Watermark.add()` को एक `Annotation` ऑब्जेक्ट पर लागू किया जाता है। +- **क्या विकास के लिए लाइसेंस चाहिए?** परीक्षण के लिए एक फ्री ट्रायल काम करता है; उत्पादन के लिए एक स्थायी लाइसेंस आवश्यक है। +- **क्या मैं बड़े PDFs प्रोसेस कर सकता हूँ?** हाँ – API पेजों को स्ट्रीम करती है, फ़ाइलें > 500 MB को पूरी डाक्यूमेंट को मेमोरी में लोड किए बिना संभालती है। +- **क्या समाधान थ्रेड‑सेफ़ है?** सभी सार्वजनिक मेथड्स स्टेटलेस हैं, इसलिए आप कई इंस्टेंस को समानांतर चलाने में सुरक्षित हैं। + +## watermark pdf java क्या है? +`watermark pdf java` वह क्षमता है जो जावा कोड से PDF दस्तावेज़ों में दृश्य वॉटरमार्क जोड़ती है, आमतौर पर GroupDocs.Watermark जैसी लाइब्रेरी का उपयोग करके। यह फ़ाइल के भीतर सीधे स्वामित्व, गोपनीयता या ब्रांडिंग लागू करने में मदद करती है, जबकि मूल लेआउट को संरक्षित रखती है और दिखावट व स्थान पर सूक्ष्म नियंत्रण की अनुमति देती है। + +## जावा के लिए GroupDocs.Watermark क्यों उपयोग करें? +GroupDocs.Watermark **50+ इनपुट और आउटपुट फॉर्मेट** का समर्थन करता है, मानक हार्डवेयर पर 2 सेकंड से कम समय में सैकड़ों पृष्ठों वाले PDFs को प्रोसेस करता है, और पूर्ण PDF व्यूअर स्थापित करने की आवश्यकता नहीं होती। इसका एनोटेशन‑अवेयर इंजन मूल लेआउट को संरक्षित रखता है जबकि समायोज्य अपारदर्शिता, घूर्णन, और फ़ॉन्ट स्टाइलिंग के साथ टेक्स्ट वॉटरमार्क डालता है, जिससे यह एंटरप्राइज़‑ग्रेड वॉटरमार्किंग के लिए तेज़ और विश्वसनीय विकल्प बनता है। + +## पूर्वापेक्षाएँ +- **Java Development Kit (JDK)** 8 या उससे ऊपर। +- **Maven** (या मैन्युअल JAR इन्क्लूज़न) डिपेंडेंसी मैनेजमेंट के लिए। +- PDF संरचना और जावा प्रोग्रामिंग अवधारणाओं की बुनियादी परिचितता। + +## जावा में PDFs पर वॉटरमार्किंग के लिए पूर्वापेक्षाएँ क्या हैं? +आपको एक संगत JDK, Maven (या JAR फ़ाइलें), और एक वैध GroupDocs.Watermark लाइसेंस चाहिए। लाइब्रेरी किसी भी OS पर चलती है जो Java 8+ का समर्थन करता है, और यह Java 11, 17, और नए LTS रिलीज़ के साथ काम करती है। अतिरिक्त रूप से, सुनिश्चित करें कि आपके प्रोजेक्ट में बड़े PDFs को प्रोसेस करने के लिए पर्याप्त हीप मेमोरी (कम से कम 2 GB) हो और आउटपुट डायरेक्टरी में लिखने की अनुमति हो। + +## जावा के लिए GroupDocs.Watermark सेटअप करना +कोड लिखने से पहले, लाइब्रेरी को अपने प्रोजेक्ट में जोड़ें। + +### Maven सेटअप +अपने `pom.xml` फ़ाइल में निम्नलिखित जोड़ें: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### डायरेक्ट डाउनलोड +वैकल्पिक रूप से, नवीनतम संस्करण यहाँ से डाउनलोड करें: [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/)। + +#### लाइसेंस प्राप्ति +- **Free Trial** – बिना शुल्क के कोर फीचर का अन्वेषण करें। +- **Temporary License** – विकास के दौरान पूरी क्षमताओं को अनलॉक करें। +- **Purchase** – उत्पादन उपयोग और प्रीमियम सपोर्ट के लिए स्थायी लाइसेंस प्राप्त करें। + +### बेसिक इनिशियलाइज़ेशन +`Watermark` वह एंट्री पॉइंट क्लास है जो दस्तावेज़ लोड करता है, वॉटरमार्क ऑब्जेक्ट लागू करता है, और परिणाम सहेजता है। +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## GroupDocs.Watermark for Java का उपयोग करके PDF इमेज एनोटेशन में टेक्स्ट वॉटरमार्क कैसे जोड़ें? +`Watermark.load()` एक PDF दस्तावेज़ को प्रोसेसिंग के लिए Watermark API में लोड करता है। `TextWatermark` एक टेक्स्टुअल वॉटरमार्क को दर्शाता है जिसमें फ़ॉन्ट, आकार, रंग, अपारदर्शिता, और घूर्णन को कस्टमाइज़ किया जा सकता है। `ImageAnnotation` एक PDF एनोटेशन है जिसमें एम्बेडेड इमेज होती है, जिसे वॉटरमार्किंग के लिए टारगेट किया जा सकता है। `annotation.addWatermark()` बनाये गये वॉटरमार्क को एनोटेशन से जोड़ता है, और `watermark.save()` संशोधित दस्तावेज़ को निर्दिष्ट पाथ पर लिखता है। + +`Watermark.load("sample.pdf")` से अपना PDF लोड करें, एक `TextWatermark` इंस्टेंस बनाएं, प्रत्येक `ImageAnnotation` पर इटरेट करें, और `annotation.addWatermark(textWatermark)` को कॉल करें। अंत में, संशोधित दस्तावेज़ को `watermark.save("output.pdf")` से सहेजें। यह संक्षिप्त प्रक्रिया एक ही पास में किसी भी संख्या में एनोटेशन को संभालती है और मूल एनोटेशन मेटाडेटा को संरक्षित रखती है। + +### PDF इमेज एनोटेशन में टेक्स्ट वॉटरमार्क जोड़ना +निम्नलिखित सेक्शन प्रत्येक चरण को विस्तृत करते हैं। + +#### चरण 1: PDF दस्तावेज़ लोड करें +टारगेट PDF फ़ाइल खोलें ताकि API उसके एनोटेशन ऑब्जेक्ट्स को निरीक्षण कर सके। +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### चरण 2: टेक्स्ट वॉटरमार्क बनाएं +`TextWatermark` एक टेक्स्टुअल वॉटरमार्क को दर्शाता है जिसमें फ़ॉन्ट, आकार, रंग, अपारदर्शिता, और घूर्णन को कस्टमाइज़ किया जा सकता है। +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### चरण 3: एनोटेशन पर वॉटरमार्क लागू करें +`ImageAnnotation` एक PDF एनोटेशन है जिसमें एम्बेडेड इमेज होती है, जिसे वॉटरमार्किंग के लिए टारगेट किया जा सकता है। +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### चरण 4: वॉटरमार्केड PDF सहेजें +`watermark.save()` संशोधित दस्तावेज़ को निर्दिष्ट पाथ पर लिखता है। +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## सामान्य समस्याएँ और समाधान +- **Missing Dependencies** – सुनिश्चित करें कि सभी GroupDocs आर्टिफैक्ट्स `pom.xml` में सूचीबद्ध हैं। +- **File Path Issues** – रिलेटिव‑पाथ की आश्चर्यजनक स्थितियों से बचने के लिए एब्सोल्यूट पाथ या `Paths.get()` का उपयोग करें। +- **Unsupported Annotation Types** – वर्तमान में API `ImageAnnotation`, `TextAnnotation`, और `StampAnnotation` को संभालती है; अन्य प्रकारों के लिए कस्टम हैंडलिंग आवश्यक है। + +## व्यावहारिक उपयोग +PDF इमेज एनोटेशन में टेक्स्ट वॉटरमार्क जोड़ना विशेष रूप से उपयोगी है: +1. **Legal Documents** – अनुबंधों को “Confidential – For Internal Use Only” के साथ चिह्नित करें। +2. **Confidential Reports** – कंपनी‑व्यापी लेबल एम्बेड करके आकस्मिक लीक को रोकें। +3. **Marketing Materials** – प्रोमोशनल PDFs को सूक्ष्म लोगो‑टेक्स्ट ओवरले के साथ ब्रांड करें। +4. **Academic Drafts** – रिसर्च पेपर पर “Draft – Do Not Distribute” संकेत दें, पियर रिव्यू से पहले। + +## प्रदर्शन संबंधी विचार +- **Batch Processing** – कई PDFs को एक ही थ्रेड पूल में समूहित करें ताकि JVM ओवरहेड कम हो। +- **Memory Management** – लाइब्रेरी पेजों को स्ट्रीम करती है, इसलिए 200 MB से बड़ी फ़ाइलों के लिए कम से कम 2 GB हीप आवंटित करें। +- **Watermark Settings** – कम अपारदर्शिता (जैसे 30 %) दृश्य अव्यवस्था को घटाती है जबकि अभी भी पहचानने योग्य रहती है। + +## अक्सर पूछे जाने वाले प्रश्न + +**Q: क्या मैं अन्य एनोटेशन प्रकारों में वॉटरमार्क जोड़ सकता हूँ?** +A: हाँ, आप वही `addWatermark` मेथड उपयोग करके `TextAnnotation`, `StampAnnotation`, या कस्टम एनोटेशन ऑब्जेक्ट को टारगेट कर सकते हैं। + +**Q: क्या पृष्ठ पर वॉटरमार्क की संख्या पर कोई सीमा है?** +A: कोई कठोर सीमा नहीं है, लेकिन कुल अपारदर्शिता को 70 % से नीचे रखें ताकि पठनीयता बनी रहे और प्रदर्शन में गिरावट न आए। + +**Q: लागू होने के बाद वॉटरमार्क को कैसे हटाऊँ?** +A: `annotation.removeWatermark(watermarkId)` का उपयोग करें या `Watermark.removeAll()` कॉल करके दस्तावेज़ से सभी वॉटरमार्क हटाएँ। + +**Q: क्या लाइब्रेरी पासवर्ड‑प्रोटेक्टेड PDFs को संभालती है?** +A: हाँ – दस्तावेज़ लोड करते समय पासवर्ड प्रदान करें: `Watermark.load("secure.pdf", "myPassword")`। + +**Q: अधिकतम समर्थित फ़ाइल आकार क्या है?** +A: API 64‑बिट JVM पर 2 GB तक की फ़ाइलें प्रोसेस कर सकती है; बड़ी फ़ाइलों को वॉटरमार्किंग से पहले सेक्शन में विभाजित करना चाहिए। + +## संसाधन +- [GroupDocs.Watermark दस्तावेज़](https://docs.groupdocs.com/watermark/java/) +- [API रेफ़रेंस](https://reference.groupdocs.com/watermark/java) +- [GroupDocs.Watermark for Java डाउनलोड करें](https://releases.groupdocs.com/watermark/java/) +- [GitHub रिपॉज़िटरी](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [फ्री सपोर्ट फ़ोरम](https://forum.groupdocs.com/c/watermark/10) +- [टेम्पररी लाइसेंस एप्लिकेशन](https://purchase.groupdocs.com/temporary-license/) + +--- + +**अंतिम अपडेट:** 2026-07-30 +**परीक्षित संस्करण:** GroupDocs.Watermark 23.9 for Java +**लेखक:** GroupDocs + +## संबंधित ट्यूटोरियल + +- [GroupDocs.Watermark for Java का उपयोग करके PDF में टेक्स्ट वॉटरमार्क कैसे जोड़ें (2023 गाइड)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [GroupDocs.Watermark for Java का उपयोग करके विशिष्ट PDF पृष्ठों में टेक्स्ट और इमेज वॉटरमार्क कैसे जोड़ें](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [जावा में दस्तावेज़ वॉटरमार्किंग के लिए GroupDocs.Watermark का उपयोग करके PDF आर्टिफैक्ट्स तक पहुँच और इटरेट करें](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/hongkong/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/hongkong/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..33910e380 --- /dev/null +++ b/content/hongkong/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,269 @@ +--- +date: '2026-07-30' +description: 了解如何在 Java 中為 GroupDocs.Watermark 設定授權，有效保護文件並高效管理使用情況。 +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: 如何在 Java 中為 GroupDocs.Watermark 設定授權。本指南將帶您完成 SDK 安裝、取得 metered key + 以及配置授權以保護文件的步驟。 +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: 如何在 Java 中為 GroupDocs Watermark 設定授權 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: 如何在 Java 中為 GroupDocs Watermark 設定授權 +type: docs +url: /zh-hant/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# 如何在 Java 中為 GroupDocs Watermark 設定授權 + +## 快速解答 + +- **什麼是計量授權？** 這是一種基於使用量的授權，會記錄每一次 API 呼叫，讓您只為實際消耗付費。 +- **我需要先取得試用嗎？** 是的，您可以向 GroupDocs 網站申請臨時授權以評估產品。 +- **需要哪個版本的 Java？** Java 8 或更新版本；SDK 為 JDK 8+ 編譯。 +- **我可以之後改為永久授權嗎？** 當然可以，只要將計量金鑰換成永久授權檔案即可。 +- **此設定與 Maven 相容嗎？** 是的，已提供 Maven 坐標以便無縫管理相依性。 + +## GroupDocs Watermark 的計量授權是什麼？ + +計量授權是由 GroupDocs 提供的雲端授權，會記錄 SDK 執行的每一次加水印操作。每個 API 呼叫都會在 GroupDocs 的授權伺服器上記錄，讓您能依實際使用量採取即付即用的計費方式。此模式讓開發者即時掌握消耗情況，協助控制成本，同時確保完整功能存取。 + +## 為什麼在 GroupDocs Watermark 使用計量授權？ + +GroupDocs.Watermark 支援超過五十種輸入與輸出格式，包括 PDF、DOCX、PPTX 以及各種影像類型，且可在不將整個文件載入記憶體的情況下處理高達 1 GB 的檔案，從而維持效能。使用計量授權只需為實際執行的操作付費，使解決方案能以成本效益的方式擴展，同時保有全部功能的完整存取。 + +## 前置條件 + +- **GroupDocs.Watermark for Java** 版本 24.11 或更新。 +- 已安裝並設定 Java Development Kit (JDK) 8 或更新版本。 +- 具備 Maven 或手動 JAR 管理的基本知識。 +- 從 GroupDocs 入口網站取得的臨時或永久授權金鑰。 + +## 如何在 Java 中為 GroupDocs Watermark 設定計量授權？ + +載入您的公鑰與私鑰，建立 `Metered` 實例，並套用授權——只需三個簡潔步驟。此方法確保每一次加水印請求都會計入您的帳戶，讓您完整掌握消耗情況。 + +### 步驟 1：定義公鑰與私鑰 + +輸入您在註冊臨時授權後收到的金鑰。 + +`Metered` 是處理計量授權與使用量追蹤的 GroupDocs.Watermark 類別。 +*在程式碼中使用金鑰前，請將金鑰放置於安全位置（環境變數、加密設定檔等）。* + +### 步驟 2：建立 Metered 類別的實例 + +使用您的金鑰實例化 `Metered` 物件。此物件會在初始化時傳遞給水印引擎。 + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### 步驟 3：使用提供的金鑰設定計量授權 + +呼叫 `setLicense` 方法（或等效的 API 呼叫）並傳入您的公鑰與私鑰。設定完成後，所有後續的加水印操作都會依照您的使用量計費。 + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **專業提示：** 請將金鑰從原始碼管理中排除。使用機密管理服務或加密屬性檔，以避免意外洩漏。 + +## 設定 GroupDocs.Watermark for Java + +### 安裝資訊 + +使用 Maven 或直接下載 JAR，將 GroupDocs.Watermark 整合至您的專案中。 + +**Maven 設定：** +在您的 `pom.xml` 檔案中加入以下設定： + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**直接下載：** +從 [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) 下載最新版本。 + +### 取得授權 + +欲解鎖完整功能，請取得免費試用或臨時授權： + +- 在 [GroupDocs 網站](https://purchase.groupdocs.com/temporary-license/) 註冊以開始使用。 +- 取得金鑰後，依實作指南將其整合至您的專案中。 + +### 基本初始化與設定 + +將 SDK 加入專案後，匯入必要的命名空間，並依上述程式碼片段建立水印引擎實例。 + +## 疑難排解技巧 + +- **金鑰無效：** 請再次確認公鑰與私鑰完全相符，任何一個錯字都會導致授權失效。 +- **授權檔案路徑錯誤：** 若使用檔案型授權，請確保檔案路徑為絕對路徑或正確相對於工作目錄解析。 +- **網路問題：** 計量授權需要向外發出 HTTPS 請求；請確認防火牆允許連線至 `api.groupdocs.com`。 + +## 實務應用 + +1. **文件安全性：** 為 PDF、Word 文件與影像加入可見或隱形水印，以保護機密企業資料。 +2. **使用量追蹤：** 產生每日加水印文件數量的報告，協助預算編列與合規性。 +3. **CMS 整合：** 在內容發布工作流程中自動插入水印，授權會自動套用。 + +## 效能考量 + +**效能最佳化：** +- 僅在必要時加水印；對已受保護的檔案跳過處理。 +- 大量批次時，重複使用相同的 `WatermarkEngine` 實例，以避免重複初始化的開銷。 + +**最佳實踐：** +- 處理數百頁 PDF 時監控 JVM 堆積使用情況；若記憶體成為瓶頸，請考慮使用串流 API。 +- 將日誌等級設為 `INFO`，以捕捉授權呼叫，同時避免過多輸出至主控台。 + +## 結論 + +本指南說明了在 Java 中為 GroupDocs.Watermark **設定授權** 的方法，從 Maven 安裝到計量金鑰配置。依循步驟即可取得精確的使用量追蹤、彈性的計費方式與強大的文件保護，且不影響效能。 + +**後續步驟：** +- 嘗試不同的水印樣式（文字、影像、斜線）。 +- 探索進階功能，例如依使用者角色套用條件式水印。 +- 檢視 GroupDocs 分析儀表板，以監控消耗趨勢。 + +準備好保護您的文件了嗎？立即實作此解決方案，讓您安心資產受到保護，且授權成本透明可見。 + +## 常見問題 + +**Q: 臨時授權與永久授權有何差異？** +A: 臨時授權有時間限制，適合評估使用；永久授權則提供無限使用，且無需定期付費。 + +**Q: 我可以在不更改程式碼的情況下，從計量授權切換為永久授權嗎？** +A: 可以——只需將計量金鑰的初始化改為呼叫 `engine.setLicense("path/to/license/file")`。 + +**Q: 若無法連線至計量服務會怎樣？** +A: SDK 會切換至離線模式；加水印仍會繼續，但使用量會等到連線恢復後再回報。 + +**Q: 加水印是否有檔案大小限制？** +A: SDK 可處理最高 1 GB 的檔案；較大的檔案應分割或以串流模式處理。 + +**Q: 計量授權能在所有作業系統上使用嗎？** +A: 只要支援 Java 8+，皆可使用，包括 Windows、Linux 與 macOS。 + +--- + +**最後更新：** 2026-07-30 +**測試環境：** GroupDocs.Watermark 24.11 for Java +**作者：** GroupDocs + +資源 + +- [文件說明](https://docs.groupdocs.com/watermark/java/) +- [API 參考](httpshttps://reference.groupdocs.com/watermark/java) +- [下載](https://releases.groupdocs.com/watermark/java/) +- [GitHub 程式庫](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [免費支援論壇](https://forum.groupdocs.com/c/watermark/10) +- [臨時授權取得](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## 相關教學 + +- [GroupDocs.Watermark for Java 授權與設定教學](/watermark/java/licensing-configuration/) +- [如何在 Java 中設定 GroupDocs.Watermark 授權：完整指南](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java 加水印指南：使用 GroupDocs.Watermark API 保護文件](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/hongkong/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/hongkong/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..ad5779f73 --- /dev/null +++ b/content/hongkong/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,248 @@ +--- +date: '2026-07-30' +description: 了解如何使用 GroupDocs.Watermark 在 Java 中為 PDF 圖像註釋添加文字浮水印，有效保護您的文件。 +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: 使用 GroupDocs.Watermark 在 Java 中為 PDF 圖像註釋添加文字浮水印，快速可靠地保護您的文件。 +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: 在 Java 中為 PDF 加浮水印 – 為圖像註釋添加文字浮水印 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: 在 Java 中為 PDF 加浮水印 – 為圖像註釋添加文字浮水印 +type: docs +url: /zh-hant/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# 在 Java 中為 PDF 加上水印 – 為圖像註釋添加文字 + +保護 PDF 檔案免於未經授權的散佈是開發人員每日都要面對的問題。**Watermark PDF Java** 讓您直接在圖像註釋上嵌入可見文字，確保每一頁都帶有您的品牌或機密聲明。於本教學中，您將了解此方法為何可靠、需要哪些前置條件，以及使用 GroupDocs.Watermark for Java 的逐步實作。 + +## 快速解答 +- **此函式庫的功能是什麼？** 它可以在 PDF、Word、Excel 以及圖像檔案上新增、編輯或移除水印。 +- **建立水印的主要方法是什麼？** `Watermark.add()` 作用於 `Annotation` 物件。 +- **開發時需要授權嗎？** 免費試用可用於測試；正式上線需購買永久授權。 +- **能處理大型 PDF 嗎？** 可以 — API 會串流頁面，支援處理超過 500 MB 的檔案而不需一次載入整份文件至記憶體。 +- **此解決方案是執行緒安全的嗎？** 所有公開方法皆為無狀態 (stateless)，因此可安全平行執行多個實例。 + +## 什麼是 Watermark PDF Java？ +`watermark pdf java` 指的是從 Java 程式碼為 PDF 文件加入視覺水印的能力，通常使用如 GroupDocs.Watermark 的函式庫。它可在檔案內直接強化所有權、保密性或品牌標示，同時保留原始版面配置，並允許對外觀與位置進行精細控制。 + +## 為什麼要在 Java 中使用 GroupDocs.Watermark？ +GroupDocs.Watermark 支援 **50 多種輸入與輸出格式**，在標準硬體上可於 2 秒內處理上百頁的 PDF，且不需安裝完整的 PDF 檢視器。其具備註釋感知的引擎在插入可調整不透明度、旋轉角度與字型樣式的文字水印時，仍能保留原始版面配置，使其成為企業級水印的快速且可靠選擇。 + +## 前置條件 +- **Java Development Kit (JDK)** 8 或以上。 +- **Maven**（或手動加入 JAR）用於相依管理。 +- 具備 PDF 結構與 Java 程式概念的基本認識。 + +## 在 Java 中為 PDF 加水印的前置條件是什麼？ +您需要相容的 JDK、Maven（或 JAR 檔案）以及有效的 GroupDocs.Watermark 授權。此函式庫可在任何支援 Java 8+ 的作業系統上執行，亦相容於 Java 11、17 以及更新的 LTS 版本。另外，請確保專案具備足夠的堆積記憶體（至少 2 GB）以處理大型 PDF，且對輸出目錄具有寫入權限。 + +## 設定 GroupDocs.Watermark for Java +在撰寫任何程式碼之前，先將函式庫加入您的專案。 + +### Maven 設定 +將以下內容加入您的 `pom.xml` 檔案： +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### 直接下載 +或是從 [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) 下載最新版本。 + +#### 取得授權 +- **Free Trial** – 免費探索核心功能。 +- **Temporary License** – 在開發期間解鎖全部功能。 +- **Purchase** – 取得永久授權以供正式使用並獲得高級支援。 + +### 基本初始化 +`Watermark` 為入口類別，用於載入文件、套用水印物件，並儲存結果。 +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## 如何使用 GroupDocs.Watermark for Java 為 PDF 圖像註釋添加文字水印？ +`Watermark.load()` 會將 PDF 文件載入 Watermark API 以供處理。`TextWatermark` 代表可自訂字型、大小、顏色、不透明度與旋轉角度的文字水印。`ImageAnnotation` 是包含嵌入圖像的 PDF 註釋，可作為水印目標。`annotation.addWatermark()` 會將建立的水印附加至該註釋，而 `watermark.save()` 則將修改後的文件寫入指定路徑。 + +使用 `Watermark.load("sample.pdf")` 載入 PDF，建立 `TextWatermark` 實例，遍歷每個 `ImageAnnotation`，呼叫 `annotation.addWatermark(textWatermark)`。最後，以 `watermark.save("output.pdf")` 儲存修改後的文件。此簡潔流程可在一次遍歷中處理任意數量的註釋，並保留原始註釋的中繼資料。 + +### 為 PDF 圖像註釋添加文字水印 +以下各節將說明每一步驟。 + +#### 步驟 1：載入 PDF 文件 +開啟目標 PDF 檔案，以便 API 檢查其註釋物件。 +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### 步驟 2：建立文字水印 +`TextWatermark` 代表可自訂字型、大小、顏色、不透明度與旋轉角度的文字水印。 +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### 步驟 3：將水印套用至註釋 +`ImageAnnotation` 是包含嵌入圖像的 PDF 註釋，可作為水印目標。 +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### 步驟 4：儲存已加水印的 PDF +`watermark.save()` 將修改後的文件寫入指定路徑。 +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## 常見問題與解決方案 +- **Missing Dependencies** – 確認所有 GroupDocs 元件已列於 `pom.xml` 中。 +- **File Path Issues** – 使用絕對路徑或 `Paths.get()` 以避免相對路徑的意外。 +- **Unsupported Annotation Types** – 目前 API 支援 `ImageAnnotation`、`TextAnnotation` 與 `StampAnnotation`；其他類型需自行處理。 + +## 實務應用 +在 PDF 圖像註釋上添加文字水印特別適用於： + +1. **Legal Documents** – 在合約上標註「機密 – 僅限內部使用」。 +2. **Confidential Reports** – 透過嵌入公司標籤防止意外外洩。 +3. **Marketing Materials** – 為推廣 PDF 加上細緻的標誌文字覆蓋，以提升品牌形象。 +4. **Academic Drafts** – 在研究論文的審稿前標示「草稿 – 請勿散發」。 + +## 效能考量 +- **Batch Processing** – 將多個 PDF 合併至同一執行緒池，以減少 JVM 開銷。 +- **Memory Management** – 函式庫會串流頁面，對於大於 200 MB 的檔案請配置至少 2 GB 堆積記憶體。 +- **Watermark Settings** – 降低不透明度（例如 30 %）可減少視覺雜訊，同時仍能被偵測。 + +## 常見問答 + +**Q: 我可以為其他註釋類型加水印嗎？** +A: 可以，您可使用相同的 `addWatermark` 方法針對 `TextAnnotation`、`StampAnnotation` 或自訂註釋物件加水印。 + +**Q: 在單一頁面上放置水印的數量有限制嗎？** +A: 沒有硬性上限，但建議將總不透明度控制在 70 % 以下，以維持可讀性並避免效能下降。 + +**Q: 已加水印後如何移除？** +A: 使用 `annotation.removeWatermark(watermarkId)` 或呼叫 `Watermark.removeAll()` 以移除文件中的所有水印。 + +**Q: 函式庫能處理受密碼保護的 PDF 嗎？** +A: 能 — 載入文件時提供密碼，例如 `Watermark.load("secure.pdf", "myPassword")`。 + +**Q: 支援的最大檔案大小為多少？** +A: 在 64 位元 JVM 上，API 可處理最高 2 GB 的檔案；較大的檔案需先分割為多個部分再進行加水印。 + +## 資源 +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +**最後更新：** 2026-07-30 +**測試環境：** GroupDocs.Watermark 23.9 for Java +**作者：** GroupDocs + +## 相關教學 + +- [如何使用 GroupDocs.Watermark for Java 為 PDF 添加文字水印（2023 指南）](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [如何使用 GroupDocs.Watermark for Java 為特定 PDF 頁面添加文字與圖像水印](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [在 Java 中使用 GroupDocs.Watermark 存取與遍歷 PDF 藝術品以進行文件加水印](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/hungarian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/hungarian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..e049850c3 --- /dev/null +++ b/content/hungarian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Ismerje meg, hogyan állíthat be licencet a GroupDocs.Watermark számára + Java-ban, védje hatékonyan dokumentumait, és kezelje hatékonyan a használatot. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Hogyan állítsunk be licencet a GroupDocs.Watermark számára Java-ban. + Ez az útmutató végigvezeti Önt az SDK telepítésén, a mérőkulcs beszerzésén és a + licenc konfigurálásán a dokumentumok védelme érdekében. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Hogyan állítsuk be a licencet a GroupDocs Watermark Java-ban +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Hogyan állítsuk be a licencet a GroupDocs Watermark Java-ban +type: docs +url: /hu/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Hogyan állítsuk be a licencet a GroupDocs Watermark-hez Java-ban + +Az intellektuális tulajdon védelme kiemelt prioritás a modern alkalmazások számára, és a vízjelek bevált módja a jogosulatlan terjesztés megakadályozásának. Ha **GroupDocs.Watermark for Java**-t használ, szüksége lesz egy licencre, amely nyomon követi a használatot és a kereslethez igazodik. Ez az útmutató elmagyarázza, **hogyan állítsuk be a licencet** a GroupDocs.Watermark-hez Java-ban, a SDK telepítésétől a felhasználás alapján jelentést küldő metered kulcs konfigurálásáig. + +## Gyors válaszok +- **Mi az a metered licenc?** Ez egy használaton alapuló licenc, amely rögzíti minden API hívást, lehetővé téve, hogy csak a felhasznált mennyiségért fizessen. +- **Szükségem van először próbaidőre?** Igen, kérhet ideiglenes licencet a GroupDocs weboldaláról a termék kipróbálásához. +- **Melyik Java verzió szükséges?** Java 8 vagy újabb; az SDK JDK 8+ számára van lefordítva. +- **Válthatok később örökös licencre?** Természetesen – csak cserélje le a metered kulcsokat egy állandó licencfájlra. +- **A beállítás kompatibilis a Maven-nel?** Igen, a Maven koordináták biztosítva vannak a zökkenőmentes függőségkezeléshez. + +## Mi az a metered licenc a GroupDocs Watermark-hez? +A metered licenc egy felhőalapú jogosultság, amelyet a GroupDocs biztosít, és amely rögzíti a SDK által végrehajtott minden vízjel-alkalmazási műveletet. Minden API hívás a GroupDocs licencszerverén kerül naplózásra, lehetővé téve a felhasználás alapján történő fizetést. Ez a modell valós idejű betekintést nyújt a fejlesztőknek a fogyasztásba, és segít a költségek ellenőrzésében, miközben teljes funkcióhozzáférést biztosít. + +## Miért használjunk metered licencet a GroupDocs Watermark-nél? +A GroupDocs.Watermark több mint ötven bemeneti és kimeneti formátumot támogat – köztük PDF, DOCX, PPTX és különféle képformátumok – és képes akár 1 GB méretű fájlok feldolgozására anélkül, hogy a teljes dokumentumot a memóriába töltené, ezáltal megőrizve a teljesítményt. A metered licenc használatával csak a ténylegesen végrehajtott műveletekért fizet, ami költséghatékony skálázhatóságot biztosít, miközben teljes hozzáférést nyújt minden funkcióhoz. + +## Előfeltételek +- **GroupDocs.Watermark for Java** 24.11 vagy újabb verzió. +- Java Development Kit (JDK) 8 vagy újabb telepítve és konfigurálva. +- Alapvető ismeretek Maven vagy manuális JAR-kezelés terén. +- Ideiglenes vagy állandó licenckulcs a GroupDocs portálról. + +## Hogyan állítsunk be metered licencet a GroupDocs Watermark-hez Java-ban? + +Töltse be a nyilvános és privát kulcsait, hozza létre a `Metered` példányt, és alkalmazza a licencet – mindezt három tömör lépésben. Ez a megközelítés garantálja, hogy minden vízjelkérést számlázzanak a fiókjában, teljes átláthatóságot biztosítva a fogyasztásra. + +### 1. lépés: A nyilvános és privát kulcsok meghatározása +Adja meg a kulcsokat, amelyeket az ideiglenes licenc regisztrálása után kapott. + +`Metered` a GroupDocs.Watermark osztály, amely a metered licencelést és a használat nyomon követését kezeli. +*Helyezze a kulcsokat biztonságos helyre (környezeti változók, titkosított konfiguráció stb.) a kódban való használat előtt.* + +### 2. lépés: A Metered osztály példányosítása +Hozza létre a `Metered` objektumot a kulcsaival. Ez az objektum az inicializálás során lesz átadva a vízjelmotor számára. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### 3. lépés: A metered licenc beállítása a megadott kulcsokkal +Hívja meg a `setLicense` metódust (vagy a megfelelő API hívást) a nyilvános és privát kulcsokkal. A beállítás után minden további vízjel művelet a felhasználás alapján lesz számlázva. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro tipp:** Tartsa a kulcsokat a forráskód-kezelésen kívül. Használjon titkok kezelőt vagy titkosított tulajdonságfájlt a véletlen kiszivárgás elkerülése érdekében. + +## A GroupDocs.Watermark beállítása Java-hoz + +### Telepítési információk + +Integrálja a GroupDocs.Watermark-ot a projektjébe Maven használatával vagy a JAR közvetlen letöltésével. + +**Maven beállítás:** +Adja hozzá a következő konfigurációt a `pom.xml` fájlhoz: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Közvetlen letöltés:** +Töltse le a legújabb verziót a [GroupDocs.Watermark for Java kiadások](https://releases.groupdocs.com/watermark/java/) oldalról. + +### Licenc beszerzése + +A teljes funkcionalitás feloldásához szerezzen be egy ingyenes próbaidőszakot vagy ideiglenes licencet: + +- Regisztráljon a [GroupDocs weboldalon](https://purchase.groupdocs.com/temporary-license/) a kezdéshez. +- A kulcsok megszerzése után integrálja őket a projektjébe, ahogyan az implementációs útmutatóban látható. + +### Alap inicializálás és beállítás + +Miután az SDK hozzá lett adva a projekthez, importálja a szükséges névtereket, és hozza létre a vízjelmotor példányt, ahogyan a fenti kódrészletekben bemutatott. + +## Hibaelhárítási tippek +- **Érvénytelen kulcsok:** Ellenőrizze, hogy a nyilvános és privát kulcsok pontosan egyeznek; egyetlen elütés is megakadályozza az aktiválást. +- **Licencfájl útvonal hibák:** Ha fájl alapú licencet részesít előnyben, győződjön meg arról, hogy az útvonal abszolút vagy helyesen feloldott a munkakönyvtárhoz képest. +- **Hálózati problémák:** A metered licenchez kimenő HTTPS hívások szükségesek; ellenőrizze, hogy a tűzfala engedélyezi a forgalmat a `api.groupdocs.com` felé. + +## Gyakorlati alkalmazások +1. **Dokumentumbiztonság:** Látható vagy láthatatlan vízjelek hozzáadása PDF-ekhez, Word dokumentumokhoz és képekhez az érzékeny vállalati adatok védelme érdekében. +2. **Használat nyomon követése:** Jelentések készítése arról, hogy naponta hány dokumentumot jelöltek meg vízjellel, ami hasznos a költségvetés és a megfelelőség szempontjából. +3. **CMS integráció:** A vízjel beszúrásának automatizálása a tartalom közzétételi munkafolyamatok során, a licenc automatikus érvényesítésével. + +## Teljesítmény szempontok + +**A teljesítmény optimalizálása:** +- Csak szükség esetén alkalmazzon vízjeleket; hagyja ki a már védett fájlok feldolgozását. +- Nagy kötegek esetén használja újra ugyanazt a `WatermarkEngine` példányt, hogy elkerülje az ismételt inicializálási terhet. + +**Legjobb gyakorlatok:** +- Figyelje a JVM heap használatát több száz oldalas PDF-ek feldolgozásakor; ha a memória szűk keresztmetszet, fontolja meg a streaming API-kat. +- Engedélyezze a naplózást `INFO` szinten, hogy rögzítse a licenc hívásokat anélkül, hogy túlterhelné a konzolt. + +## Összegzés + +Ebben az útmutatóban bemutattuk, **hogyan állítsuk be a licencet** a GroupDocs.Watermark számára Java-ban, a Maven telepítéstől a metered kulcs konfigurálásáig. A lépések követésével pontos használatkövetést, rugalmas számlázást és robusztus dokumentumvédelmet kap – mindezt a teljesítmény romlása nélkül. + +**Következő lépések:** +- Kísérletezzen különböző vízjelstílusokkal (szöveg, kép, átlós). +- Fedezze fel a fejlett funkciókat, például a felhasználói szerepkörök alapján feltételes vízjeleket. +- Tekintse át a GroupDocs analitikai irányítópultját a fogyasztási trendek nyomon követéséhez. + +Készen áll dokumentumai védelmére? Valósítsa meg a megoldást még ma, és élvezze a nyugalmat, tudva, hogy eszközei védve vannak, és a licenc költségek átláthatóak. + +## Gyakran ismételt kérdések + +**Q: Mi a különbség az ideiglenes és az örökös licenc között?** +A: Az ideiglenes licenc időkorlátos és ideális a kiértékeléshez, míg az örökös licenc korlátlan használatot biztosít ismétlődő díjak nélkül. + +**Q: Át tudok váltani a metered licencről örökös licencre kódbeli módosítások nélkül?** +A: Igen – cserélje le a metered kulcs inicializálását egy `engine.setLicense("path/to/license/file")` hívásra. + +**Q: Mi történik, ha a metered szolgáltatás elérhetetlen?** +A: Az SDK offline módra vált; a vízjelezés folytatódik, de a használat csak a kapcsolat helyreállítása után lesz jelentve. + +**Q: Vannak fájlméret korlátok a vízjelezésnél?** +A: Az SDK akár 1 GB méretű fájlok kezelésére képes; nagyobb fájlokat fel kell osztani vagy streaming módban kell feldolgozni. + +**Q: Működik a metered licenc minden operációs rendszeren?** +A: Működik minden olyan platformon, amely támogatja a Java 8+-ot, beleértve a Windows, Linux és macOS rendszereket. + +--- + +**Legutóbb frissítve:** 2026-07-30 +**Tesztelve ezzel:** GroupDocs.Watermark 24.11 for Java +**Szerző:** GroupDocs + +**Erőforrások** +- [Dokumentáció](https://docs.groupdocs.com/watermark/java/) +- [API referencia](https://reference.groupdocs.com/watermark/java) +- [Letöltés](https://releases.groupdocs.com/watermark/java/) +- [GitHub tároló](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Ingyenes támogatási fórum](https://forum.groupdocs.com/c/watermark/10) +- [Ideiglenes licenc beszerzése](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Kapcsolódó oktatóanyagok + +- [GroupDocs.Watermark Java licencelés és konfigurációs oktatóanyagok](/watermark/java/licensing-configuration/) +- [Hogyan állítsuk be a GroupDocs.Watermark licencelést Java-ban: Teljes útmutató](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java vízjelezési útmutató: Dokumentumok védelme a GroupDocs.Watermark API-val](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/hungarian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/hungarian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..dd5fcb07c --- /dev/null +++ b/content/hungarian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,252 @@ +--- +date: '2026-07-30' +description: Ismerje meg, hogyan lehet PDF-et vízjelezni Java-ban, text watermark + hozzáadásával a PDF image annotations-hoz a GroupDocs.Watermark segítségével, és + hatékonyan megvédeni dokumentumait. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: PDF vízjel Java-ban, text watermark hozzáadásával a PDF image annotations-hoz + a GroupDocs.Watermark segítségével. Dokumentumait gyorsan és megbízhatóan védje. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: PDF vízjel Java-ban – Add Text to Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: PDF vízjel Java-ban – Add Text to Image Annotations +type: docs +url: /hu/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# PDF vízjel Java‑ban – Szöveg hozzáadása kép megjegyzésekhez + +A PDF‑fájlok jogosulatlan terjesztés elleni védelme mindennapi aggodalom a fejlesztők számára. **Watermark PDF Java** lehetővé teszi, hogy látható szöveget ágyazzunk közvetlenül a kép megjegyzésekbe, biztosítva, hogy minden oldal viselje a márkát vagy a titoktartási figyelmeztetést. Ebben az útmutatóban megismerheted, miért megbízható ez a megközelítés, mire van szükséged a kezdéshez, és egy lépésről‑lépésre megvalósítást a GroupDocs.Watermark for Java segítségével. + +## Gyors válaszok +- **Mit csinál a könyvtár?** Vízjeleket ad hozzá, szerkeszt, vagy eltávolít PDF‑eken, Word‑ön, Excel‑en és képfájlokon. +- **Melyik fő metódus hozza létre a vízjelet?** `Watermark.add()` alkalmazva egy `Annotation` objektumra. +- **Szükség van licencre a fejlesztéshez?** Egy ingyenes próba verzió tesztelésre elegendő; a termeléshez állandó licenc szükséges. +- **Nagy PDF‑eket is tudok feldolgozni?** Igen – az API oldalanként streameli a fájlokat, így > 500 MB‑os dokumentumokat is kezel anélkül, hogy a teljes fájlt a memóriába töltené. +- **A megoldás szálbiztos?** Minden publikus metódus állapot nélküli, így több példányt is biztonságosan futtathatsz párhuzamosan. + +## Mi az a watermark pdf java? +A `watermark pdf java` a vizuális vízjelek PDF‑dokumentumokhoz való hozzáadásának képességét jelenti Java‑kódból, általában a GroupDocs.Watermark könyvtár használatával. Segít a tulajdonjog, a titoktartás vagy a márka közvetlen beágyazásában a fájlba, miközben megőrzi az eredeti elrendezést, és finomhangolt vezérlést biztosít a megjelenés és a pozicionálás felett. + +## Miért a GroupDocs.Watermark for Java? +A GroupDocs.Watermark **50+ bemeneti és kimeneti formátumot** támogat, több száz oldalas PDF‑eket 2 másodperc alatt dolgoz fel standard hardveren, és nem igényel teljes PDF‑viewer telepítését. Az annotáció‑tudatos motor megőrzi az eredeti elrendezést, miközben állítható átlátszóságú, forgatható és betűstílus‑testreszabható szöveges vízjeleket illeszt be, így gyors, megbízható választás vállalati szintű vízjelezéshez. + +## Előfeltételek +- **Java Development Kit (JDK)** 8 vagy újabb. +- **Maven** (vagy kézi JAR‑beillesztés) a függőségkezeléshez. +- Alapvető ismeretek a PDF‑szerkezetről és a Java programozásról. + +## Mik az előfeltételek a PDF‑ek Java‑ban történő vízjelezéséhez? +Kompatibilis JDK‑ra, Maven‑re (vagy a JAR‑fájlokra) és érvényes GroupDocs.Watermark licencre van szükség. A könyvtár bármely, Java 8+‑t támogató operációs rendszeren fut, és kompatibilis a Java 11, 17 és újabb LTS kiadásokkal. Emellett biztosítsd, hogy a projektnek elegendő heap memóriája legyen (legalább 2 GB) a nagy PDF‑ek feldolgozásához, és legyen írási jogosultsága a kimeneti könyvtárra. + +## GroupDocs.Watermark for Java beállítása +Mielőtt kódot írnál, add hozzá a könyvtárat a projektedhez. + +### Maven beállítás +Add hozzá a következőt a `pom.xml` fájlodhoz: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Közvetlen letöltés +Alternatívaként töltsd le a legújabb verziót a [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) oldalról. + +#### Licenc beszerzése +- **Ingyenes próba** – fedezd fel a fő funkciókat díj nélkül. +- **Ideiglenes licenc** – teljes funkcionalitás fejlesztés közben. +- **Vásárlás** – állandó licenc a termeléshez és prémium támogatáshoz. + +### Alapvető inicializálás +A `Watermark` a belépési pont osztály, amely betölti a dokumentumot, alkalmazza a vízjel‑objektumokat, és elmenti az eredményt. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Hogyan adjunk szöveges vízjelet PDF kép megjegyzésekhez a GroupDocs.Watermark for Java segítségével? +A `Watermark.load()` betölti a PDF‑dokumentumot a Watermark API‑ba feldolgozásra. A `TextWatermark` egy szöveges vízjelet képvisel, amelynek betűtípusa, mérete, színe, átlátszósága és forgatása testreszabható. Az `ImageAnnotation` egy PDF‑annotáció, amely beágyazott képet tartalmaz, és célpontként szolgálhat a vízjelezéshez. Az `annotation.addWatermark()` csatolja a létrehozott vízjelet az annotációhoz, a `watermark.save()` pedig a módosított dokumentumot a megadott útvonalra írja. + +Töltsd be a PDF‑t a `Watermark.load("sample.pdf")` paranccsal, hozd létre a `TextWatermark` példányt, iterálj végig minden `ImageAnnotation` objektumon, és hívd meg az `annotation.addWatermark(textWatermark)` metódust. Végül mentsd el a módosított dokumentumot a `watermark.save("output.pdf")` hívással. Ez a tömör folyamat egyetlen átfutásban kezeli a megjegyzések tetszőleges számát, és megőrzi az eredeti annotáció metaadatait. + +### Szöveges vízjel hozzáadása PDF kép megjegyzésekhez +Az alábbi szakaszok bontják le a lépéseket. + +#### 1. lépés: PDF dokumentum betöltése +Nyisd meg a cél PDF‑fájlt, hogy az API ellenőrizhesse a megjegyzés‑objektumokat. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### 2. lépés: Szöveges vízjel létrehozása +A `TextWatermark` egy szöveges vízjelet képvisel, amelynek betűtípusa, mérete, színe, átlátszósága és forgatása testreszabható. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### 3. lépés: Vízjel alkalmazása az annotációkra +Az `ImageAnnotation` egy PDF‑annotáció, amely beágyazott képet tartalmaz, és célpontként szolgálhat a vízjelezéshez. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### 4. lépés: Vízjelezett PDF mentése +A `watermark.save()` a módosított dokumentumot a megadott útvonalra írja. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Gyakori problémák és megoldások +- **Hiányzó függőségek** – Ellenőrizd, hogy minden GroupDocs‑artifact szerepel-e a `pom.xml`‑ben. +- **Fájlútvonal‑problémák** – Használj abszolút útvonalakat vagy `Paths.get()`‑t a relatív‑útvonalak meglepetéseinek elkerülése érdekében. +- **Nem támogatott annotáció‑típusok** – Az API jelenleg kezeli az `ImageAnnotation`, `TextAnnotation` és `StampAnnotation` típusokat; más típusokhoz egyedi kezelést kell megvalósítani. + +## Gyakorlati alkalmazások +Szöveges vízjel PDF kép megjegyzésekhez különösen hasznos: +1. **Jogos dokumentumok** – Jelöld a szerződéseket “Confidential – For Internal Use Only” felirattal. +2. **Bizalmas jelentések** – Megakadályozd a véletlen szivárgást egy vállalati címke beágyazásával. +3. **Marketing anyagok** – Márkázd a promóciós PDF‑eket egy finom logó‑szöveg átfedéssel. +4. **Akademiai vázlatok** – Jelezd a “Draft – Do Not Distribute” feliratot a kutatási anyagokon a lektorálás előtt. + +## Teljesítménybeli megfontolások +- **Kötegelt feldolgozás** – Csoportosíts több PDF‑et egyetlen szálkezelőbe a JVM‑túlterhelés minimalizálása érdekében. +- **Memóriakezelés** – A könyvtár oldalanként streamel, ezért legalább 2 GB heap‑et ajánlunk 200 MB‑nál nagyobb fájlokhoz. +- **Vízjel beállítások** – Alacsonyabb átlátszóság (pl. 30 %) csökkenti a vizuális zajt, miközben továbbra is észlelhető marad. + +## Gyakran feltett kérdések + +**K: Hozzá tudok-e adni vízjelet más annotáció‑típusokhoz?** +V: Igen, a `TextAnnotation`, `StampAnnotation` vagy egyedi annotáció‑objektumok is célozhatók ugyanazzal az `addWatermark` metódussal. + +**K: Van korlátozás arra, hány vízjelet helyezhetek el egy oldalon?** +V: Nincs szigorú korlát, de a teljes átlátszóságot tartsd 70 % alatt a olvashatóság és a teljesítmény megőrzése érdekében. + +**K: Hogyan távolíthatom el a vízjelet a felvitel után?** +V: Használd az `annotation.removeWatermark(watermarkId)` metódust, vagy hívd a `Watermark.removeAll()`‑t a dokumentum összes vízjelének eltávolításához. + +**K: Kezeli-e a könyvtár a jelszóval védett PDF‑eket?** +V: Igen – add meg a jelszót a dokumentum betöltésekor: `Watermark.load("secure.pdf", "myPassword")`. + +**K: Mi a maximális támogatott fájlméret?** +V: Az API 2 GB‑ig képes fájlokat feldolgozni 64‑bit JVM‑en; nagyobb fájlokat előbb szakaszokra kell bontani a vízjelezés előtt. + +## Források +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Utolsó frissítés:** 2026-07-30 +**Tesztelt verzió:** GroupDocs.Watermark 23.9 for Java +**Szerző:** GroupDocs + +## Kapcsolódó oktatóanyagok + +- [How to Add a Text Watermark to PDF Using GroupDocs.Watermark for Java (2023 Guide)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [How to Add Text and Image Watermarks to Specific PDF Pages Using GroupDocs.Watermark for Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Access and Iterate Over PDF Artifacts Using GroupDocs.Watermark in Java for Document Watermarking](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/indonesian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/indonesian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..d8fd1c8df --- /dev/null +++ b/content/indonesian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Pelajari cara mengatur lisensi untuk GroupDocs.Watermark di Java, lindungi + dokumen Anda secara efektif, dan kelola penggunaan dengan efisien. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Cara mengatur lisensi untuk GroupDocs.Watermark di Java. Panduan ini + memandu Anda melalui pemasangan SDK, memperoleh kunci bermeter, dan mengonfigurasi + lisensi untuk mengamankan dokumen Anda. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Cara Mengatur Lisensi untuk GroupDocs Watermark di Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Cara Mengatur Lisensi untuk GroupDocs Watermark di Java +type: docs +url: /id/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Cara Mengatur Lisensi untuk GroupDocs Watermark di Java + +Melindungi kekayaan intelektual adalah prioritas utama bagi aplikasi modern, dan watermark adalah cara terbukti untuk mencegah distribusi tidak sah. Jika Anda menggunakan **GroupDocs.Watermark for Java**, Anda memerlukan lisensi yang dapat melacak penggunaan dan skalabel dengan permintaan. Tutorial ini menjelaskan **cara mengatur lisensi** untuk GroupDocs.Watermark di Java, mulai dari menginstal SDK hingga mengonfigurasi kunci bermeter yang melaporkan konsumsi kembali ke layanan. + +## Jawaban Cepat +- **Apa itu lisensi bermeter?** Ini adalah lisensi berbasis penggunaan yang mencatat setiap panggilan API, memungkinkan Anda membayar hanya untuk apa yang Anda konsumsi. +- **Apakah saya perlu percobaan terlebih dahulu?** Ya, Anda dapat meminta lisensi sementara dari situs GroupDocs untuk mengevaluasi produk. +- **Versi Java apa yang diperlukan?** Java 8 atau lebih baru; SDK dikompilasi untuk JDK 8+. +- **Bisakah saya beralih ke lisensi permanen nanti?** Tentu – cukup ganti kunci bermeter dengan file lisensi permanen. +- **Apakah pengaturan kompatibel dengan Maven?** Ya, koordinat Maven disediakan untuk manajemen dependensi yang mulus. + +## Apa itu lisensi bermeter untuk GroupDocs Watermark? +Lisensi bermeter adalah hak penggunaan berbasis cloud yang disediakan oleh GroupDocs yang mencatat setiap operasi watermark yang dilakukan oleh SDK. Setiap panggilan API dicatat pada server lisensi GroupDocs, memungkinkan penagihan pay‑as‑you‑go berdasarkan penggunaan aktual. Model ini memberi pengembang wawasan waktu nyata tentang konsumsi dan membantu mengontrol biaya sambil memastikan akses penuh ke semua fitur. + +## Mengapa menggunakan lisensi bermeter dengan GroupDocs Watermark? +GroupDocs.Watermark mendukung lebih dari lima puluh format input dan output—termasuk PDF, DOCX, PPTX, dan berbagai jenis gambar—dan dapat memproses file hingga 1 GB tanpa memuat seluruh dokumen ke memori, yang menjaga kinerja. Dengan menggunakan lisensi bermeter Anda hanya membayar untuk operasi yang benar‑benar dijalankan, memungkinkan solusi skalabel secara biaya sambil mempertahankan akses penuh ke semua fitur. + +## Prasyarat +- Versi **GroupDocs.Watermark for Java** 24.11 atau lebih baru. +- Java Development Kit (JDK) 8 atau lebih baru yang terpasang dan dikonfigurasi. +- Familiaritas dasar dengan Maven atau manajemen JAR manual. +- Kunci lisensi sementara atau permanen dari portal GroupDocs. + +## Cara mengatur lisensi bermeter untuk GroupDocs Watermark di Java? + +Muat kunci publik dan pribadi Anda, buat instance `Metered`, dan terapkan lisensi—semua dalam tiga langkah singkat. Pendekatan ini menjamin setiap permintaan watermark dihitung terhadap akun Anda, memberi Anda visibilitas penuh terhadap konsumsi. + +### Langkah 1: Tentukan kunci publik dan pribadi +Masukkan kunci yang Anda terima setelah mendaftar untuk lisensi sementara. + +`Metered` adalah kelas GroupDocs.Watermark yang menangani lisensi bermeter dan pelacakan penggunaan. +*Letakkan kunci Anda di lokasi yang aman (variabel lingkungan, konfigurasi terenkripsi, dll.) sebelum menggunakannya dalam kode.* + +### Langkah 2: Buat instance dari kelas Metered +Instansiasi objek `Metered` dengan kunci Anda. Objek ini akan diteruskan ke mesin watermark selama inisialisasi. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Langkah 3: Atur lisensi bermeter menggunakan kunci yang disediakan +Panggil metode `setLicense` (atau panggilan API setara) dengan kunci publik dan pribadi Anda. Setelah diatur, semua operasi watermark berikutnya akan ditagih sesuai penggunaan Anda. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Tips pro:** Simpan kunci di luar kontrol sumber. Gunakan manajer rahasia atau file properti terenkripsi untuk menghindari paparan tidak sengaja. + +## Menyiapkan GroupDocs.Watermark untuk Java + +### Informasi Instalasi + +Integrasikan GroupDocs.Watermark ke dalam proyek Anda menggunakan Maven atau dengan mengunduh JAR secara langsung. + +**Pengaturan Maven:** +Tambahkan konfigurasi berikut dalam file `pom.xml` Anda: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Unduhan Langsung:** +Unduh versi terbaru dari [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Akuisisi Lisensi + +Untuk membuka semua fungsi, dapatkan percobaan gratis atau lisensi sementara: + +- Daftar di [situs GroupDocs](https://purchase.groupdocs.com/temporary-license/) untuk memulai. +- Setelah memperoleh kunci Anda, integrasikan ke dalam proyek Anda seperti yang ditunjukkan dalam panduan implementasi. + +### Inisialisasi dan Pengaturan Dasar + +Setelah SDK ditambahkan ke proyek Anda, impor namespace yang diperlukan dan buat instance mesin watermark seperti yang ditunjukkan dalam cuplikan kode di atas. + +## Tips Pemecahan Masalah +- **Kunci tidak valid:** Periksa kembali bahwa kunci publik dan pribadi cocok persis; satu typo saja akan mencegah aktivasi. +- **Kesalahan jalur file lisensi:** Jika Anda lebih suka lisensi berbasis file, pastikan jalur file bersifat absolut atau terresolusi dengan benar relatif terhadap direktori kerja. +- **Masalah jaringan:** Lisensi bermeter memerlukan panggilan HTTPS keluar; verifikasi bahwa firewall Anda mengizinkan lalu lintas ke `api.groupdocs.com`. + +## Aplikasi Praktis +1. **Keamanan Dokumen:** Tambahkan watermark terlihat atau tidak terlihat pada PDF, dokumen Word, dan gambar untuk melindungi data perusahaan yang sensitif. +2. **Pelacakan Penggunaan:** Hasilkan laporan tentang berapa banyak dokumen yang telah diberi watermark per hari, berguna untuk penganggaran dan kepatuhan. +3. **Integrasi CMS:** Otomatiskan penyisipan watermark selama alur kerja penerbitan konten, dengan lisensi yang secara otomatis ditegakkan. + +## Pertimbangan Kinerja + +**Mengoptimalkan Kinerja:** +- Terapkan watermark hanya bila diperlukan; lewati pemrosesan untuk file yang sudah dilindungi. +- Untuk batch besar, gunakan kembali instance `WatermarkEngine` yang sama untuk menghindari overhead inisialisasi berulang. + +**Praktik Terbaik:** +- Pantau penggunaan heap JVM saat memproses PDF beratus halaman; pertimbangkan API streaming jika memori menjadi kendala. +- Aktifkan logging pada level `INFO` untuk menangkap panggilan lisensi tanpa membanjiri konsol. + +## Kesimpulan + +Dalam panduan ini kami membahas **cara mengatur lisensi** untuk GroupDocs.Watermark di Java, mulai dari instalasi Maven hingga konfigurasi kunci bermeter. Dengan mengikuti langkah‑langkah tersebut, Anda memperoleh pelacakan penggunaan yang tepat, penagihan fleksibel, dan perlindungan dokumen yang kuat—semua tanpa mengorbankan kinerja. + +**Langkah Selanjutnya:** +- Bereksperimen dengan berbagai gaya watermark (teks, gambar, diagonal). +- Jelajahi fitur lanjutan seperti watermark bersyarat berdasarkan peran pengguna. +- Tinjau dasbor analitik GroupDocs untuk memantau tren konsumsi. + +Siap mengamankan dokumen Anda? Implementasikan solusi hari ini dan nikmati ketenangan pikiran mengetahui aset Anda terlindungi dan biaya lisensi Anda transparan. + +## Pertanyaan yang Sering Diajukan + +**T: Apa perbedaan antara lisensi sementara dan lisensi permanen?** +A: Lisensi sementara bersifat terbatas waktu dan ideal untuk evaluasi, sementara lisensi permanen memberikan penggunaan tak terbatas tanpa biaya berulang. + +**T: Bisakah saya beralih dari lisensi bermeter ke lisensi permanen tanpa perubahan kode?** +A: Ya—ganti inisialisasi kunci bermeter dengan panggilan ke `engine.setLicense("path/to/license/file")`. + +**T: Apa yang terjadi jika layanan bermeter tidak dapat dijangkau?** +A: SDK beralih ke mode offline; watermarking tetap berlanjut tetapi penggunaan tidak akan dilaporkan sampai konektivitas dipulihkan. + +**T: Apakah ada batas ukuran file untuk watermarking?** +A: SDK dapat menangani file hingga 1 GB; file yang lebih besar harus dipisah atau diproses dalam mode streaming. + +**T: Apakah lisensi bermeter bekerja di semua sistem operasi?** +A: Ini bekerja di platform apa pun yang mendukung Java 8+, termasuk Windows, Linux, dan macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Sumber Daya** + +- [Dokumentasi](https://docs.groupdocs.com/watermark/java/) +- [Referensi API](https://reference.groupdocs.com/watermark/java) +- [Unduh](https://releases.groupdocs.com/watermark/java/) +- [Repositori GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum Dukungan Gratis](https://forum.groupdocs.com/c/watermark/10) +- [Akuisisi Lisensi Sementara](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Tutorial Terkait + +- [Tutorial Lisensi dan Konfigurasi GroupDocs.Watermark untuk Java](/watermark/java/licensing-configuration/) +- [Cara Menyiapkan Lisensi GroupDocs.Watermark di Java: Panduan Lengkap](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Panduan Watermarking Java: Amankan Dokumen dengan API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/indonesian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/indonesian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..ba360643e --- /dev/null +++ b/content/indonesian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Pelajari cara menambahkan watermark PDF di Java dengan menambahkan watermark + teks ke anotasi gambar PDF menggunakan GroupDocs.Watermark, melindungi dokumen Anda + secara efektif. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF di Java dengan menambahkan watermark teks ke anotasi + gambar PDF menggunakan GroupDocs.Watermark. Amankan dokumen Anda dengan cepat dan + dapat diandalkan. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF di Java – Tambahkan Teks ke Anotasi Gambar +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF di Java – Tambahkan Teks ke Anotasi Gambar +type: docs +url: /id/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Watermark PDF di Java – Tambahkan Teks ke Anotasi Gambar + +Melindungi file PDF dari distribusi tidak sah adalah perhatian harian bagi pengembang. **Watermark PDF Java** memungkinkan Anda menyematkan teks yang terlihat langsung pada anotasi gambar, memastikan setiap halaman membawa merek atau pemberitahuan kerahasiaan Anda. Dalam tutorial ini Anda akan melihat mengapa pendekatan ini dapat diandalkan, apa yang Anda perlukan untuk memulai, dan implementasi langkah demi langkah menggunakan GroupDocs.Watermark untuk Java. + +## Jawaban Cepat +- **Apa yang dilakukan perpustakaan?** Ia menambahkan, mengedit, atau menghapus watermark pada file PDF, Word, Excel, dan gambar. +- **Metode utama mana yang membuat watermark?** `Watermark.add()` diterapkan pada objek `Annotation`. +- **Apakah saya memerlukan lisensi untuk pengembangan?** Versi percobaan gratis dapat digunakan untuk pengujian; lisensi permanen diperlukan untuk produksi. +- **Bisakah saya memproses PDF besar?** Ya – API melakukan streaming halaman, menangani file > 500 MB tanpa memuat seluruh dokumen ke memori. +- **Apakah solusi ini thread‑safe?** Semua metode publik bersifat stateless, sehingga Anda dapat menjalankan beberapa instance secara paralel dengan aman. + +## Apa itu watermark pdf java? +`watermark pdf java` mengacu pada kemampuan menambahkan watermark visual ke dokumen PDF dari kode Java, biasanya menggunakan perpustakaan seperti GroupDocs.Watermark. Ini membantu menegakkan kepemilikan, kerahasiaan, atau branding langsung di dalam file sambil mempertahankan tata letak asli dan memungkinkan kontrol terperinci atas tampilan dan penempatan. + +## Mengapa menggunakan GroupDocs.Watermark untuk Java? +GroupDocs.Watermark mendukung **lebih dari 50 format input dan output**, memproses PDF berukuran ratusan halaman dalam waktu kurang dari 2 detik pada perangkat keras standar, dan tidak memerlukan pemasangan penampil PDF lengkap. Mesin yang sadar anotasi ini mempertahankan tata letak asli sambil menyisipkan watermark teks dengan opasitas yang dapat disesuaikan, rotasi, dan gaya font, menjadikannya pilihan cepat dan andal untuk watermark tingkat perusahaan. + +## Prasyarat +- **Java Development Kit (JDK)** 8 atau lebih tinggi. +- **Maven** (atau penyertaan JAR manual) untuk manajemen dependensi. +- Pemahaman dasar tentang struktur PDF dan konsep pemrograman Java. + +## Apa saja prasyarat untuk watermark PDF di Java? +Anda memerlukan JDK yang kompatibel, Maven (atau file JAR), dan lisensi GroupDocs.Watermark yang valid. Perpustakaan ini berjalan pada sistem operasi apa pun yang mendukung Java 8+, dan berfungsi dengan Java 11, 17, serta rilis LTS yang lebih baru. Selain itu, pastikan proyek Anda memiliki memori heap yang cukup (setidaknya 2 GB) untuk memproses PDF besar dan Anda memiliki izin menulis ke direktori output. + +## Menyiapkan GroupDocs.Watermark untuk Java +Sebelum menulis kode apa pun, tambahkan perpustakaan ke proyek Anda. + +### Pengaturan Maven +Tambahkan berikut ke file `pom.xml` Anda: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Unduhan Langsung +Alternatifnya, unduh versi terbaru dari [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Akuisisi Lisensi +- **Free Trial** – jelajahi fitur inti tanpa biaya. +- **Temporary License** – buka semua kemampuan selama pengembangan. +- **Purchase** – dapatkan lisensi permanen untuk penggunaan produksi dan dukungan premium. + +### Inisialisasi Dasar +`Watermark` adalah kelas titik masuk yang memuat dokumen, menerapkan objek watermark, dan menyimpan hasilnya. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Cara menambahkan watermark teks ke anotasi gambar PDF menggunakan GroupDocs.Watermark untuk Java? +`Watermark.load()` memuat dokumen PDF ke dalam API Watermark untuk diproses. `TextWatermark` mewakili watermark teks dengan font, ukuran, warna, opasitas, dan rotasi yang dapat disesuaikan. `ImageAnnotation` adalah anotasi PDF yang berisi gambar tersemat, yang dapat menjadi target watermarking. `annotation.addWatermark()` menempelkan watermark yang dibuat ke anotasi, dan `watermark.save()` menulis dokumen yang telah dimodifikasi ke jalur yang ditentukan. + +Muat PDF Anda dengan `Watermark.load("sample.pdf")`, buat instance `TextWatermark`, iterasi setiap `ImageAnnotation`, dan panggil `annotation.addWatermark(textWatermark)`. Akhirnya, simpan dokumen yang dimodifikasi dengan `watermark.save("output.pdf")`. Alur singkat ini menangani sejumlah anotasi dalam satu kali proses dan mempertahankan metadata anotasi asli. + +### Menambahkan Watermark Teks ke Anotasi Gambar PDF +Bagian berikut menjelaskan setiap langkah. + +#### Langkah 1: Muat Dokumen PDF +Buka file PDF target sehingga API dapat memeriksa objek anotasinya. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Langkah 2: Buat Watermark Teks +`TextWatermark` mewakili watermark teks dengan font, ukuran, warna, opasitas, dan rotasi yang dapat disesuaikan. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Langkah 3: Terapkan Watermark ke Anotasi +`ImageAnnotation` adalah anotasi PDF yang berisi gambar tersemat, yang dapat menjadi target watermarking. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Langkah 4: Simpan PDF yang Diberi Watermark +`watermark.save()` menulis dokumen yang telah dimodifikasi ke jalur yang ditentukan. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Masalah Umum dan Solusinya +- **Missing Dependencies** – Verifikasi bahwa semua artefak GroupDocs terdaftar di `pom.xml`. +- **File Path Issues** – Gunakan jalur absolut atau `Paths.get()` untuk menghindari kejutan jalur relatif. +- **Unsupported Annotation Types** – API saat ini menangani `ImageAnnotation`, `TextAnnotation`, dan `StampAnnotation`; tipe lain memerlukan penanganan khusus. + +## Aplikasi Praktis +Menambahkan watermark teks ke anotasi gambar PDF sangat berguna untuk: +1. **Legal Documents** – Tandai kontrak dengan “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Cegah kebocoran tidak sengaja dengan menyematkan label perusahaan. +3. **Marketing Materials** – Beri merek pada PDF promosi dengan overlay logo‑teks yang halus. +4. **Academic Drafts** – Tunjukkan “Draft – Do Not Distribute” pada makalah penelitian sebelum tinjauan sejawat. + +## Pertimbangan Kinerja +- **Batch Processing** – Kelompokkan beberapa PDF ke dalam satu thread pool untuk meminimalkan overhead JVM. +- **Memory Management** – Perpustakaan melakukan streaming halaman, jadi alokasikan setidaknya 2 GB heap untuk file yang lebih besar dari 200 MB. +- **Watermark Settings** – Opasitas yang lebih rendah (mis., 30 %) mengurangi kekacauan visual sambil tetap dapat terdeteksi. + +## Pertanyaan yang Sering Diajukan + +**Q: Bisakah saya menambahkan watermark ke tipe anotasi lain?** +A: Ya, Anda dapat menargetkan `TextAnnotation`, `StampAnnotation`, atau objek anotasi khusus dengan menggunakan metode `addWatermark` yang sama. + +**Q: Apakah ada batas berapa banyak watermark yang dapat saya tempatkan pada satu halaman?** +A: Tidak ada batas keras, tetapi pertahankan total opasitas di bawah 70 % untuk menjaga keterbacaan dan menghindari penurunan kinerja. + +**Q: Bagaimana cara menghapus watermark setelah diterapkan?** +A: Gunakan `annotation.removeWatermark(watermarkId)` atau panggil `Watermark.removeAll()` untuk menghapus semua watermark dari dokumen. + +**Q: Apakah perpustakaan menangani PDF yang dilindungi kata sandi?** +A: Ya – berikan kata sandi saat memuat dokumen: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Berapa ukuran file maksimum yang didukung?** +A: API dapat memproses file hingga 2 GB pada JVM 64‑bit; file yang lebih besar harus dibagi menjadi bagian sebelum watermarking. + +## Sumber Daya +- [Dokumentasi GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Referensi API](https://reference.groupdocs.com/watermark/java) +- [Unduh GroupDocs.Watermark untuk Java](https://releases.groupdocs.com/watermark/java/) +- [Repositori GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum Dukungan Gratis](https://forum.groupdocs.com/c/watermark/10) +- [Aplikasi Lisensi Sementara](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Terakhir Diperbarui:** 2026-07-30 +**Diuji Dengan:** GroupDocs.Watermark 23.9 untuk Java +**Penulis:** GroupDocs + +## Tutorial Terkait + +- [Cara Menambahkan Watermark Teks ke PDF Menggunakan GroupDocs.Watermark untuk Java (Panduan 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Cara Menambahkan Watermark Teks dan Gambar ke Halaman PDF Tertentu Menggunakan GroupDocs.Watermark untuk Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Akses dan Iterasi Artefak PDF Menggunakan GroupDocs.Watermark di Java untuk Watermark Dokumen](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/italian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/italian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..10463d4cc --- /dev/null +++ b/content/italian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Scopri come impostare la licenza per GroupDocs.Watermark in Java, proteggi + i tuoi documenti in modo efficace e gestisci l'utilizzo in modo efficiente. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Come impostare la licenza per GroupDocs.Watermark in Java. Questa + guida ti accompagna nell'installazione dell'SDK, nell'ottenere una metered key e + nella configurazione della licenza per proteggere i tuoi documenti. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Come impostare la licenza per GroupDocs Watermark in Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Come impostare la licenza per GroupDocs Watermark in Java +type: docs +url: /it/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Come impostare la licenza per GroupDocs Watermark in Java + +Proteggere la proprietà intellettuale è una priorità fondamentale per le applicazioni moderne, e i watermark sono un metodo comprovato per scoraggiare la distribuzione non autorizzata. Se utilizzi **GroupDocs.Watermark for Java**, avrai bisogno di una licenza che possa monitorare l'uso e scalare con la domanda. Questo tutorial spiega **come impostare la licenza** per GroupDocs.Watermark in Java, dall'installazione dell'SDK alla configurazione di una chiave a consumo che riporta il consumo al servizio. + +## Risposte rapide +- **Che cos'è una licenza a consumo?** È una licenza basata sull'uso che registra ogni chiamata API, consentendoti di pagare solo per ciò che consumi. +- **Devo prima avere una versione di prova?** Sì, puoi richiedere una licenza temporanea dal sito GroupDocs per valutare il prodotto. +- **Quale versione di Java è richiesta?** Java 8 o successiva; l'SDK è compilato per JDK 8+. +- **Posso passare a una licenza perpetua in seguito?** Assolutamente – basta sostituire le chiavi a consumo con un file di licenza permanente. +- **L'installazione è compatibile con Maven?** Sì, le coordinate Maven sono fornite per una gestione delle dipendenze senza interruzioni. + +## Che cos'è una licenza a consumo per GroupDocs Watermark? +Una licenza a consumo è un diritto abilitato al cloud fornito da GroupDocs che registra ogni operazione di watermark eseguita dall'SDK. Ogni chiamata API viene registrata sul server di licenze di GroupDocs, consentendo una fatturazione pay‑as‑you‑go basata sull'uso reale. Questo modello fornisce agli sviluppatori informazioni in tempo reale sul consumo e aiuta a controllare i costi garantendo al contempo l'accesso completo alle funzionalità. + +## Perché utilizzare una licenza a consumo con GroupDocs Watermark? +GroupDocs.Watermark supporta più di cinquanta formati di input e output — inclusi PDF, DOCX, PPTX e vari tipi di immagine — e può elaborare file fino a 1 GB senza caricare l'intero documento in memoria, preservando le prestazioni. Utilizzando una licenza a consumo paghi solo per le operazioni che effettivamente esegui, consentendo alla soluzione di scalare in modo economicamente efficiente mantenendo l'accesso completo a tutte le funzionalità. + +## Prerequisiti +- **GroupDocs.Watermark for Java** versione 24.11 o successiva. +- Un Java Development Kit (JDK) 8 o successivo installato e configurato. +- Familiarità di base con Maven o la gestione manuale dei JAR. +- Una chiave di licenza temporanea o permanente dal portale GroupDocs. + +## Come impostare una licenza a consumo per GroupDocs Watermark in Java? + +Carica le tue chiavi pubbliche e private, crea un'istanza `Metered` e applica la licenza — il tutto in tre passaggi concisi. Questo approccio garantisce che ogni richiesta di watermark venga conteggiata sul tuo account, offrendoti piena visibilità sul consumo. + +### Passo 1: Definire le chiavi pubblica e privata +Immetti le chiavi che hai ricevuto dopo la registrazione per una licenza temporanea. + +`Metered` è la classe GroupDocs.Watermark che gestisce la licenza a consumo e il tracciamento dell'uso. +*Posiziona le tue chiavi in un luogo sicuro (variabili d'ambiente, configurazione crittografata, ecc.) prima di usarle nel codice.* + +### Passo 2: Creare un'istanza della classe Metered +Instanzia l'oggetto `Metered` con le tue chiavi. Questo oggetto verrà passato al motore di watermark durante l'inizializzazione. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Passo 3: Impostare la licenza a consumo usando le chiavi fornite +Chiama il metodo `setLicense` (o l'equivalente chiamata API) con le tue chiavi pubblica e privata. Una volta impostata, tutte le successive operazioni di watermark saranno fatturate in base al tuo utilizzo. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Suggerimento:** Mantieni le chiavi fuori dal controllo del codice sorgente. Usa un gestore di segreti o un file di proprietà crittografato per evitare esposizioni accidentali. + +## Configurazione di GroupDocs.Watermark per Java + +### Informazioni sull'installazione + +Integra GroupDocs.Watermark nel tuo progetto usando Maven o scaricando direttamente il JAR. + +**Configurazione Maven:** +Aggiungi la seguente configurazione nel tuo file `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Download diretto:** +Download the latest version from [GroupDocs.Watermark per Java releases](https://releases.groupdocs.com/watermark/java/). + +### Acquisizione della licenza + +Per sbloccare tutte le funzionalità, ottieni una prova gratuita o una licenza temporanea: + +- Registrati sul [sito GroupDocs](https://purchase.groupdocs.com/temporary-license/) per iniziare. +- Dopo aver ottenuto le chiavi, integrale nel tuo progetto come mostrato nella guida di implementazione. + +### Inizializzazione e configurazione di base + +Una volta aggiunto l'SDK al tuo progetto, importa gli spazi dei nomi necessari e crea l'istanza del motore di watermark come mostrato negli snippet di codice sopra. + +## Suggerimenti per la risoluzione dei problemi +- **Chiavi non valide:** Controlla che le chiavi pubblica e privata corrispondano esattamente; un solo errore di battitura impedirà l'attivazione. +- **Errori nel percorso del file di licenza:** Se preferisci una licenza basata su file, assicurati che il percorso del file sia assoluto o correttamente risolto rispetto alla directory di lavoro. +- **Problemi di rete:** La licenza a consumo richiede chiamate HTTPS in uscita; verifica che il tuo firewall consenta il traffico verso `api.groupdocs.com`. + +## Applicazioni pratiche +1. **Sicurezza dei documenti:** Aggiungi watermark visibili o invisibili a PDF, documenti Word e immagini per proteggere dati aziendali sensibili. +2. **Tracciamento dell'uso:** Genera report su quanti documenti sono stati watermarked al giorno, utile per budgeting e conformità. +3. **Integrazione CMS:** Automatizza l'inserimento di watermark durante i flussi di lavoro di pubblicazione dei contenuti, con licenza applicata automaticamente. + +## Considerazioni sulle prestazioni + +**Ottimizzazione delle prestazioni:** +- Applica i watermark solo quando necessario; salta l'elaborazione per file già protetti. +- Per grandi batch, riutilizza la stessa istanza `WatermarkEngine` per evitare il sovraccarico di inizializzazioni ripetute. + +**Buone pratiche:** +- Monitora l'utilizzo dell'heap JVM durante l'elaborazione di PDF con centinaia di pagine; considera le API di streaming se la memoria diventa un collo di bottiglia. +- Abilita il logging a livello `INFO` per catturare le chiamate di licenza senza sovraccaricare la console. + +## Conclusione + +In questa guida abbiamo coperto **come impostare la licenza** per GroupDocs.Watermark in Java, dall'installazione Maven alla configurazione della chiave a consumo. Seguendo i passaggi, ottieni un tracciamento preciso dell'uso, fatturazione flessibile e protezione robusta dei documenti — tutto senza compromettere le prestazioni. + +**Prossimi passi:** +- Sperimenta diversi stili di watermark (testo, immagine, diagonale). +- Esplora funzionalità avanzate come watermark condizionali basati sui ruoli utente. +- Consulta la dashboard di analytics di GroupDocs per monitorare le tendenze di consumo. + +Pronto a proteggere i tuoi documenti? Implementa la soluzione oggi e goditi la tranquillità sapendo che i tuoi asset sono protetti e i costi di licenza sono trasparenti. + +## Domande frequenti + +**D: Qual è la differenza tra una licenza temporanea e una licenza perpetua?** +A: Una licenza temporanea è limitata nel tempo e ideale per la valutazione, mentre una licenza perpetua offre uso illimitato senza costi ricorrenti. + +**D: Posso passare da una licenza a consumo a una perpetua senza modifiche al codice?** +A: Sì — sostituisci l'inizializzazione della chiave a consumo con una chiamata a `engine.setLicense("path/to/license/file")`. + +**D: Cosa succede se il servizio a consumo non è raggiungibile?** +A: L'SDK passa alla modalità offline; il watermarking continua ma l'uso non verrà segnalato finché la connettività non sarà ripristinata. + +**D: Ci sono limiti di dimensione dei file per il watermarking?** +A: L'SDK può gestire file fino a 1 GB; i file più grandi dovrebbero essere suddivisi o elaborati in modalità streaming. + +**D: La licenza a consumo funziona su tutti i sistemi operativi?** +A: Funziona su qualsiasi piattaforma che supporta Java 8+, inclusi Windows, Linux e macOS. + +--- + +**Ultimo aggiornamento:** 2026-07-30 +**Testato con:** GroupDocs.Watermark 24.11 for Java +**Autore:** GroupDocs + +**Risorse** + +- [Documentazione](https://docs.groupdocs.com/watermark/java/) +- [Riferimento API](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [Repository GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum di supporto gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Acquisizione licenza temporanea](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Tutorial correlati + +- [Tutorial di licenza e configurazione di GroupDocs.Watermark per Java](/watermark/java/licensing-configuration/) +- [Come configurare la licenza di GroupDocs.Watermark in Java: Guida completa](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Guida al watermarking Java: Proteggi i documenti con l'API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/italian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/italian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..7f6589f11 --- /dev/null +++ b/content/italian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Scopri come filigranare PDF in Java aggiungendo una text watermark alle + PDF image annotations usando GroupDocs.Watermark, proteggendo i tuoi documenti in + modo efficace. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Filigrana PDF in Java aggiungendo una text watermark alle PDF image + annotations con GroupDocs.Watermark. Proteggi i tuoi documenti rapidamente e in + modo affidabile. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Filigrana PDF in Java – Add Text to Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Filigrana PDF in Java – Add Text to Image Annotations +type: docs +url: /it/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Filigrana PDF in Java – Aggiungere Testo alle Annotazioni Immagine + +Proteggere i file PDF dalla distribuzione non autorizzata è una preoccupazione quotidiana per gli sviluppatori. **Watermark PDF Java** consente di incorporare testo visibile direttamente sulle annotazioni immagine, garantendo che ogni pagina riporti il tuo marchio o avviso di riservatezza. In questo tutorial vedrai perché questo approccio è affidabile, cosa ti serve per iniziare e un'implementazione passo‑passo usando GroupDocs.Watermark per Java. + +## Risposte Rapide +- **Che cosa fa la libreria?** Aggiunge, modifica o rimuove filigrane su PDF, Word, Excel e file immagine. +- **Quale metodo principale crea la filigrana?** `Watermark.add()` applicato a un oggetto `Annotation`. +- **Ho bisogno di una licenza per lo sviluppo?** Una prova gratuita funziona per i test; è necessaria una licenza permanente per la produzione. +- **Posso elaborare PDF di grandi dimensioni?** Sì – l'API trasmette le pagine in streaming, gestendo file > 500 MB senza caricare l'intero documento in memoria. +- **La soluzione è thread‑safe?** Tutti i metodi pubblici sono senza stato, quindi è possibile eseguire più istanze in parallelo in modo sicuro. + +## Cos'è watermark pdf java? +`watermark pdf java` si riferisce alla capacità di aggiungere filigrane visive ai documenti PDF dal codice Java, tipicamente usando una libreria come GroupDocs.Watermark. Aiuta a far rispettare la proprietà, la riservatezza o il branding direttamente all'interno del file mantenendo il layout originale e consentendo un controllo granulare sull'aspetto e sul posizionamento. + +## Perché usare GroupDocs.Watermark per Java? +GroupDocs.Watermark supporta **oltre 50 formati di input e output**, elabora PDF di centinaia di pagine in meno di 2 secondi su hardware standard e non richiede l'installazione di un visualizzatore PDF completo. Il suo motore consapevole delle annotazioni preserva il layout originale inserendo filigrane testuali con opacità regolabile, rotazione e stile del font, rendendolo una scelta veloce e affidabile per la filigranatura di livello enterprise. + +## Prerequisiti +- **Java Development Kit (JDK)** 8 o superiore. +- **Maven** (o inclusione manuale di JAR) per la gestione delle dipendenze. +- Familiarità di base con la struttura PDF e i concetti di programmazione Java. + +## Quali sono i prerequisiti per la filigranatura dei PDF in Java? +Hai bisogno di un JDK compatibile, Maven (o i file JAR), e una licenza valida di GroupDocs.Watermark. La libreria funziona su qualsiasi OS che supporti Java 8+ e funziona con Java 11, 17 e le versioni LTS più recenti. Inoltre, assicurati che il tuo progetto disponga di sufficiente memoria heap (almeno 2 GB) per l'elaborazione di PDF di grandi dimensioni e che tu abbia i permessi di scrittura nella directory di output. + +## Configurazione di GroupDocs.Watermark per Java +Prima di scrivere qualsiasi codice, aggiungi la libreria al tuo progetto. + +### Configurazione Maven +Aggiungi il seguente al file `pom.xml`: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Download Diretto +In alternativa, scarica l'ultima versione da [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Acquisizione Licenza +- **Free Trial** – esplora le funzionalità principali senza costi. +- **Temporary License** – sblocca tutte le funzionalità durante lo sviluppo. +- **Purchase** – ottieni una licenza permanente per l'uso in produzione e supporto premium. + +### Inizializzazione di Base +`Watermark` è la classe di ingresso che carica un documento, applica gli oggetti filigrana e salva il risultato. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Come aggiungere una filigrana testuale alle annotazioni immagine PDF usando GroupDocs.Watermark per Java? +`Watermark.load()` carica un documento PDF nell'API Watermark per l'elaborazione. `TextWatermark` rappresenta una filigrana testuale con font, dimensione, colore, opacità e rotazione personalizzabili. `ImageAnnotation` è un'annotazione PDF che contiene un'immagine incorporata, che può essere bersaglio della filigrana. `annotation.addWatermark()` collega la filigrana creata all'annotazione, e `watermark.save()` scrive il documento modificato nel percorso specificato. + +Carica il tuo PDF con `Watermark.load("sample.pdf")`, crea un'istanza `TextWatermark`, itera su ogni `ImageAnnotation` e chiama `annotation.addWatermark(textWatermark)`. Infine, salva il documento modificato con `watermark.save("output.pdf")`. Questo flusso conciso gestisce qualsiasi numero di annotazioni in un unico passaggio e preserva i metadati originali delle annotazioni. + +### Aggiungere una Filigrana Testuale alle Annotazioni Immagine PDF +Le sezioni seguenti scompongono ogni passaggio. + +#### Passo 1: Caricare il Documento PDF +Apri il file PDF di destinazione affinché l'API possa ispezionare i suoi oggetti di annotazione. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Passo 2: Creare la Filigrana Testuale +`TextWatermark` rappresenta una filigrana testuale con font, dimensione, colore, opacità e rotazione personalizzabili. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Passo 3: Applicare la Filigrana alle Annotazioni +`ImageAnnotation` è un'annotazione PDF che contiene un'immagine incorporata, che può essere bersaglio della filigrana. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Passo 4: Salvare il PDF Filigranato +`watermark.save()` scrive il documento modificato nel percorso specificato. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Problemi Comuni e Soluzioni +- **Missing Dependencies** – Verifica che tutti gli artefatti GroupDocs siano elencati in `pom.xml`. +- **File Path Issues** – Usa percorsi assoluti o `Paths.get()` per evitare sorprese con percorsi relativi. +- **Unsupported Annotation Types** – L'API attualmente gestisce `ImageAnnotation`, `TextAnnotation` e `StampAnnotation`; altri tipi richiedono una gestione personalizzata. + +## Applicazioni Pratiche +Aggiungere una filigrana testuale alle annotazioni immagine PDF è particolarmente utile per: +1. **Legal Documents** – Contrassegnare i contratti con “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Impedire perdite accidentali incorporando un'etichetta aziendale. +3. **Marketing Materials** – Brandizzare i PDF promozionali con una leggera sovrapposizione di logo‑testo. +4. **Academic Drafts** – Indicare “Draft – Do Not Distribute” sui documenti di ricerca prima della revisione paritaria. + +## Considerazioni sulle Prestazioni +- **Batch Processing** – Raggruppa più PDF in un unico thread pool per ridurre al minimo l'overhead della JVM. +- **Memory Management** – La libreria trasmette le pagine in streaming, quindi allocare almeno 2 GB di heap per file superiori a 200 MB. +- **Watermark Settings** – Un'opacità più bassa (es. 30 %) riduce il disordine visivo mantenendo la filigrana rilevabile. + +## Domande Frequenti + +**Q: Posso aggiungere filigrane ad altri tipi di annotazione?** +A: Sì, è possibile mirare a `TextAnnotation`, `StampAnnotation` o oggetti di annotazione personalizzati usando lo stesso metodo `addWatermark`. + +**Q: Esiste un limite al numero di filigrane che posso posizionare su una pagina?** +A: Non c'è un limite rigido, ma mantieni l'opacità totale al di sotto del 70 % per preservare la leggibilità ed evitare degrado delle prestazioni. + +**Q: Come rimuovo una filigrana dopo che è stata applicata?** +A: Usa `annotation.removeWatermark(watermarkId)` o chiama `Watermark.removeAll()` per rimuovere tutte le filigrane dal documento. + +**Q: La libreria gestisce PDF protetti da password?** +A: Sì – fornisci la password durante il caricamento del documento: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Qual è la dimensione massima del file supportata?** +A: L'API può elaborare file fino a 2 GB su una JVM a 64 bit; file più grandi dovrebbero essere suddivisi in sezioni prima della filigranatura. + +## Risorse +- [Documentazione GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Riferimento API](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark per Java](https://releases.groupdocs.com/watermark/java/) +- [Repository GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum di Supporto Gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Applicazione Licenza Temporanea](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Ultimo Aggiornamento:** 2026-07-30 +**Testato Con:** GroupDocs.Watermark 23.9 for Java +**Autore:** GroupDocs + +## Tutorial Correlati + +- [Come Aggiungere una Filigrana Testuale a PDF Usando GroupDocs.Watermark per Java (Guida 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Come Aggiungere Filigrane Testo e Immagine a Pagine PDF Specifiche Usando GroupDocs.Watermark per Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Accedere e Iterare sugli Artefatti PDF Usando GroupDocs.Watermark in Java per la Filigranatura dei Documenti](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/japanese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/japanese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..0a3d09313 --- /dev/null +++ b/content/japanese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,262 @@ +--- +date: '2026-07-30' +description: Java で GroupDocs.Watermark のライセンス設定方法を学び、ドキュメントを効果的に保護し、使用状況を効率的に管理しましょう。 +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Java で GroupDocs.Watermark のライセンスを設定する方法。このガイドでは、SDK のインストール、metered + key の取得、ライセンスの構成手順を通じてドキュメントを保護します。 +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Java で GroupDocs Watermark のライセンスを設定する方法 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Java で GroupDocs Watermark のライセンスを設定する方法 +type: docs +url: /ja/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# JavaでGroupDocs Watermarkのライセンスを設定する方法 + +知的財産の保護は現代のアプリケーションにとって最優先事項であり、ウォーターマークは不正配布を防止する実証済みの方法です。**GroupDocs.Watermark for Java** を使用している場合、使用状況を追跡し需要に合わせてスケールできるライセンスが必要です。このチュートリアルでは、SDK のインストールから、使用量をサービスに報告するメータードキーの構成まで、Javaで GroupDocs.Watermark の **ライセンス設定方法** を説明します。 + +## クイック回答 +- **メータードライセンスとは何ですか？** それは使用量ベースのライセンスで、各 API 呼び出しを記録し、消費した分だけ支払えるようにします。 +- **最初にトライアルが必要ですか？** はい、製品を評価するために GroupDocs サイトから一時ライセンスをリクエストできます。 +- **必要な Java バージョンはどれですか？** Java 8 以上です。SDK は JDK 8+ 用にコンパイルされています。 +- **後で永続ライセンスに切り替えられますか？** もちろんです。メータードキーを永続ライセンスファイルに置き換えるだけです。 +- **セットアップは Maven と互換性がありますか？** はい、Maven の座標が提供されており、シームレスに依存関係を管理できます。 + +## GroupDocs Watermark のメータードライセンスとは？ + +メータードライセンスは、GroupDocs が提供するクラウド対応の権利で、SDK が実行する各ウォーターマーク操作を記録します。各 API 呼び出しは GroupDocs のライセンスサーバーに記録され、実際の使用量に基づく従量課金が可能になります。このモデルにより、開発者は消費状況をリアルタイムで把握でき、コスト管理を支援しながらフル機能へのアクセスを確保できます。 + +## GroupDocs Watermark でメータードライセンスを使用する理由 + +GroupDocs.Watermark は PDF、DOCX、PPTX などを含む 50 以上の入力および出力フォーマットをサポートし、ドキュメント全体をメモリにロードせずに最大 1 GB のファイルを処理できるため、パフォーマンスが維持されます。メータードライセンスを使用すれば、実際に実行した操作分だけ支払うことになり、コスト効果的にソリューションをスケールさせながら、すべての機能へのフルアクセスを保持できます。 + +## 前提条件 +- **GroupDocs.Watermark for Java** バージョン 24.11 以降。 +- Java Development Kit (JDK) 8 以上がインストールされ、設定されていること。 +- Maven または手動の JAR 管理に関する基本的な知識。 +- GroupDocs ポータルから取得した一時または永続ライセンスキー。 + +## JavaでGroupDocs Watermarkのメータードライセンスを設定する方法？ + +公開キーとプライベートキーをロードし、`Metered` インスタンスを作成し、ライセンスを適用します—すべて 3 つの簡潔な手順で行います。このアプローチにより、すべてのウォーターマークリクエストがアカウントに対してカウントされ、消費状況を完全に把握できます。 + +### 手順 1: 公開キーとプライベートキーを定義する +一時ライセンスの登録後に受け取ったキーを入力します。 + +`Metered` はメータードライセンスと使用状況追跡を処理する GroupDocs.Watermark クラスです。 + +*コードで使用する前に、キーを安全な場所（環境変数、暗号化された設定ファイルなど）に配置してください。* + +### 手順 2: Metered クラスのインスタンスを作成する +キーを使用して `Metered` オブジェクトをインスタンス化します。このオブジェクトは初期化時にウォーターマークエンジンに渡されます。 + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### 手順 3: 提供されたキーを使用してメータードライセンスを設定する +`setLicense` メソッド（または同等の API 呼び出し）を公開キーとプライベートキーで呼び出します。設定が完了すると、以降のすべてのウォーターマーク操作は使用量に応じて課金されます。 + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **プロのヒント:** キーをソース管理に含めないでください。シークレットマネージャーや暗号化されたプロパティファイルを使用して、偶発的な漏洩を防止しましょう。 + +## GroupDocs.Watermark for Java の設定 + +### インストール情報 + +Maven を使用するか、JAR を直接ダウンロードして、プロジェクトに GroupDocs.Watermark を統合します。 + +**Maven 設定:** +`pom.xml` ファイルに以下の設定を追加します。 + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**直接ダウンロード:** +最新バージョンは [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) からダウンロードしてください。 + +### ライセンス取得 + +フル機能を有効にするには、無料トライアルまたは一時ライセンスを取得してください。 + +- [GroupDocs のウェブサイト](https://purchase.groupdocs.com/temporary-license/) にサインアップして開始します。 +- キーを取得したら、実装ガイドに示すようにプロジェクトに統合します。 + +### 基本的な初期化と設定 + +SDK をプロジェクトに追加したら、必要な名前空間をインポートし、上記のコードスニペットで示したようにウォーターマークエンジンのインスタンスを作成します。 + +## トラブルシューティングのヒント +- **キーが無効:** 公開キーとプライベートキーが完全に一致しているか再確認してください。1 文字の誤字でも有効化できません。 +- **ライセンスファイルパスのエラー:** ファイルベースのライセンスを使用する場合、ファイルパスが絶対パスであるか、作業ディレクトリに対して正しく解決されていることを確認してください。 +- **ネットワークの問題:** メータードライセンスは外部への HTTPS 呼び出しが必要です。ファイアウォールが `api.groupdocs.com` へのトラフィックを許可しているか確認してください。 + +## 実用的な活用例 +1. **ドキュメントセキュリティ:** PDF、Word 文書、画像に可視または不可視のウォーターマークを追加し、機密企業データを保護します。 +2. **使用状況の追跡:** 1 日あたりにウォーターマークが適用された文書数のレポートを生成し、予算策定やコンプライアンスに活用します。 +3. **CMS 統合:** コンテンツ公開ワークフロー中にウォーターマーク挿入を自動化し、ライセンスが自動的に適用されます。 + +## パフォーマンス上の考慮点 + +**パフォーマンス最適化:** +- 必要な場合にのみウォーターマークを適用し、既に保護されたファイルは処理をスキップします。 +- 大量バッチの場合、同じ `WatermarkEngine` インスタンスを再利用して、初期化のオーバーヘッドを回避します。 + +**ベストプラクティス:** +- 数百ページに及ぶ PDF を処理する際は JVM ヒープ使用量を監視し、メモリがボトルネックになる場合はストリーミング API の使用を検討してください。 +- コンソールが埋め尽くされないよう、`INFO` レベルでロギングを有効にし、ライセンス呼び出しを取得します。 + +## 結論 + +このガイドでは、Maven インストールからメータードキーの構成まで、Java で GroupDocs.Watermark の **ライセンス設定方法** を取り上げました。手順に従うことで、正確な使用状況の追跡、柔軟な課金、堅牢なドキュメント保護を実現でき、パフォーマンスを損なうことはありません。 + +**次のステップ:** +- 異なるウォーターマークスタイル（テキスト、画像、斜め）を試してみてください。 +- ユーザー役割に基づく条件付きウォーターマークなど、上級機能を探求してください。 +- 消費トレンドを監視するために GroupDocs の分析ダッシュボードを確認してください。 + +ドキュメントの保護を始めませんか？本ソリューションを今日実装し、資産が保護され、ライセンス費用が透明であることに安心してください。 + +## よくある質問 + +**Q: 一時ライセンスと永続ライセンスの違いは何ですか？** +A: 一時ライセンスは期間限定で評価に最適です。一方、永続ライセンスは継続的な料金なしで無制限に使用できます。 + +**Q: メータードライセンスから永続ライセンスへコード変更なしで切り替えられますか？** +A: はい、メータードキーの初期化を `engine.setLicense("path/to/license/file")` の呼び出しに置き換えるだけです。 + +**Q: メータードサービスに接続できない場合はどうなりますか？** +A: SDK はオフラインモードにフォールバックし、ウォーターマークは継続されますが、接続が復旧するまで使用量は報告されません。 + +**Q: ウォーターマークのファイルサイズ制限はありますか？** +A: SDK は最大 1 GB のファイルを処理できます。より大きなファイルは分割するか、ストリーミングモードで処理してください。 + +**Q: メータードライセンスはすべての OS で動作しますか？** +A: Java 8+ をサポートするプラットフォーム（Windows、Linux、macOS）であれば動作します。 + +**最終更新日:** 2026-07-30 +**テスト環境:** GroupDocs.Watermark 24.11 for Java +**作者:** GroupDocs + +**リソース** +- [ドキュメント](https://docs.groupdocs.com/watermark/java/) +- [API リファレンス](https://reference.groupdocs.com/watermark/java) +- [ダウンロード](https://releases.groupdocs.com/watermark/java/) +- [GitHub リポジトリ](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [無料サポートフォーラム](https://forum.groupdocs.com/c/watermark/10) +- [一時ライセンス取得](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## 関連チュートリアル + +- [GroupDocs.Watermark for Java ライセンスと構成チュートリアル](/watermark/java/licensing-configuration/) +- [Java で GroupDocs.Watermark ライセンス設定を行う方法: 完全ガイド](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java ウォーターマーキングガイド: GroupDocs.Watermark API でドキュメントを保護する](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/japanese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/japanese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..b9e4bcb26 --- /dev/null +++ b/content/japanese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,247 @@ +--- +date: '2026-07-30' +description: GroupDocs.Watermark を使用して、PDF の画像アノテーションにテキスト透かしを追加し、Java で PDF に透かしを付ける方法を学び、ドキュメントを効果的に保護します。 +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: GroupDocs.Watermark を使用して、PDF の画像アノテーションにテキスト透かしを追加し、Java で PDF に透かしを付けます。ドキュメントを迅速かつ確実に保護します。 +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: JavaでPDFに透かしを付ける – 画像アノテーションにテキストを追加 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: JavaでPDFに透かしを付ける – 画像アノテーションにテキストを追加 +type: docs +url: /ja/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# JavaでPDFに透かしを入れる – 画像アノテーションにテキストを追加 + +PDFファイルを不正配布から保護することは、開発者にとって日々の課題です。**Watermark PDF Java** を使用すると、画像アノテーションに直接可視テキストを埋め込むことができ、すべてのページにブランドや機密通知が付与されます。このチュートリアルでは、このアプローチが信頼できる理由、開始に必要なもの、そして GroupDocs.Watermark for Java を使用したステップバイステップの実装を紹介します。 + +## クイック回答 +- **このライブラリは何をしますか？** PDF、Word、Excel、画像ファイルに対して透かしを追加、編集、または削除します。 +- **透かしを作成する主なメソッドはどれですか？** `Watermark.add()` が `Annotation` オブジェクトに適用されます。 +- **開発にライセンスは必要ですか？** 無料トライアルはテストに使用できますが、本番環境では永続ライセンスが必要です。 +- **大きなPDFを処理できますか？** はい – API はページをストリーム処理し、ファイルが > 500 MB でもドキュメント全体をメモリに読み込まずに処理できます。 +- **このソリューションはスレッドセーフですか？** すべてのパブリックメソッドはステートレスであるため、複数のインスタンスを並行して安全に実行できます。 + +## watermark pdf java とは +`watermark pdf java` は、JavaコードからPDFドキュメントに視覚的な透かしを追加する機能を指し、通常は GroupDocs.Watermark のようなライブラリを使用します。所有権、機密性、またはブランディングをファイル内に直接付与し、元のレイアウトを保持しながら外観と配置を細かく制御できます。 + +## Java向け GroupDocs.Watermark を使用する理由 +GroupDocs.Watermark は **50 以上の入力および出力フォーマット** をサポートし、標準ハードウェア上で 2 秒未満で数百ページの PDF を処理し、フル PDF ビューアのインストールは不要です。アノテーション対応エンジンは元のレイアウトを保持しながら、透明度、回転、フォントスタイルを調整可能なテキスト透かしを挿入するため、エンタープライズ向け透かし処理に高速で信頼できる選択肢となります。 + +## 前提条件 +- **Java Development Kit (JDK)** 8 以上。 +- **Maven**（または手動での JAR 追加）を依存関係管理に使用します。 +- PDF の構造と Java プログラミング概念の基本的な知識。 + +## JavaでPDFに透かしを入れるための前提条件は何ですか？ +互換性のある JDK、Maven（または JAR ファイル）、有効な GroupDocs.Watermark ライセンスが必要です。ライブラリは Java 8+ をサポートする任意の OS 上で動作し、Java 11、 17、及び新しい LTS リリースでも動作します。さらに、大きな PDF を処理するためにプロジェクトに十分なヒープメモリ（最低 2 GB）を確保し、出力ディレクトリへの書き込み権限があることを確認してください。 + +## Java向け GroupDocs.Watermark の設定 +コードを書く前に、ライブラリをプロジェクトに追加します。 + +### Maven 設定 +以下を `pom.xml` ファイルに追加してください: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### 直接ダウンロード +または、[GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) から最新バージョンをダウンロードしてください。 + +#### ライセンス取得 +- **Free Trial** – 無料でコア機能を試せます。 +- **Temporary License** – 開発中にフル機能を利用できます。 +- **Purchase** – 本番利用とプレミアムサポートのための永続ライセンスを取得します。 + +### 基本的な初期化 +`Watermark` はドキュメントをロードし、透かしオブジェクトを適用し、結果を保存するエントリポイントクラスです。 +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## GroupDocs.Watermark for Java を使用して PDF の画像アノテーションにテキスト透かしを追加する方法 +`Watermark.load()` は PDF ドキュメントを Watermark API にロードして処理します。`TextWatermark` はフォント、サイズ、色、透明度、回転をカスタマイズ可能なテキスト透かしを表します。`ImageAnnotation` は埋め込み画像を含む PDF アノテーションで、透かしの対象にできます。`annotation.addWatermark()` は作成した透かしをアノテーションに付加し、`watermark.save()` は変更されたドキュメントを指定パスに書き出します。 + +`Watermark.load("sample.pdf")` で PDF をロードし、`TextWatermark` インスタンスを作成し、各 `ImageAnnotation` を反復処理して `annotation.addWatermark(textWatermark)` を呼び出します。最後に `watermark.save("output.pdf")` で変更されたドキュメントを保存します。この簡潔なフローは、単一パスで任意の数のアノテーションを処理し、元のアノテーションメタデータを保持します。 + +### PDF の画像アノテーションにテキスト透かしを追加する +以下のセクションで各ステップを分解します。 + +#### 手順 1: PDF ドキュメントのロード +対象の PDF ファイルを開き、API がアノテーションオブジェクトを検査できるようにします。 +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### 手順 2: テキスト透かしの作成 +`TextWatermark` はフォント、サイズ、色、透明度、回転をカスタマイズ可能なテキスト透かしを表します。 +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### 手順 3: アノテーションへの透かし適用 +`ImageAnnotation` は埋め込み画像を含む PDF アノテーションで、透かしの対象にできます。 +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### 手順 4: 透かし入り PDF の保存 +`watermark.save()` は変更されたドキュメントを指定パスに書き込みます。 +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## よくある問題と解決策 +- **Missing Dependencies** – すべての GroupDocs アーティファクトが `pom.xml` に記載されていることを確認してください。 +- **File Path Issues** – 絶対パスまたは `Paths.get()` を使用して、相対パスによる予期せぬ問題を回避してください。 +- **Unsupported Annotation Types** – 現在 API は `ImageAnnotation`、`TextAnnotation`、`StampAnnotation` をサポートしており、他のタイプはカスタム処理が必要です。 + +## 実用的な活用例 +PDF の画像アノテーションにテキスト透かしを追加することは、特に次のような場面で有用です： +1. **Legal Documents** – 契約書に「機密 – 社内使用のみ」とマークします。 +2. **Confidential Reports** – 会社全体のラベルを埋め込んで、偶発的な漏洩を防止します。 +3. **Marketing Materials** – プロモーション用 PDF にさりげないロゴテキストのオーバーレイでブランド化します。 +4. **Academic Drafts** – 査読前の研究論文に「ドラフト – 配布禁止」と表示します。 + +## パフォーマンス上の考慮点 +- **Batch Processing** – 複数の PDF を単一のスレッドプールにまとめて、JVM のオーバーヘッドを最小化します。 +- **Memory Management** – ライブラリはページをストリーム処理するため、200 MB 超のファイルには少なくとも 2 GB のヒープを割り当てます。 +- **Watermark Settings** – 透明度を下げる（例: 30 %）ことで視覚的な乱れを減らしつつ、検出可能な状態を保ちます。 + +## よくある質問 +**Q: 他のアノテーションタイプにも透かしを追加できますか？** +A: はい、同じ `addWatermark` メソッドを使用して `TextAnnotation`、`StampAnnotation`、またはカスタムアノテーションオブジェクトを対象にできます。 + +**Q: 1ページに配置できる透かしの数に制限はありますか？** +A: 厳密な上限はありませんが、可読性を保ちパフォーマンス低下を防ぐため、総透明度を 70 % 未満に保ってください。 + +**Q: 適用後に透かしを削除するにはどうすればよいですか？** +A: `annotation.removeWatermark(watermarkId)` を使用するか、`Watermark.removeAll()` を呼び出してドキュメントからすべての透かしを除去します。 + +**Q: ライブラリはパスワード保護された PDF を扱えますか？** +A: はい – ドキュメントをロードする際にパスワードを指定します: `Watermark.load("secure.pdf", "myPassword")`。 + +**Q: サポートされる最大ファイルサイズはどれくらいですか？** +A: API は 64 ビット JVM 上で最大 2 GB のファイルを処理できます。より大きなファイルは透かし処理前にセクションに分割してください。 + +## リソース +- [GroupDocs.Watermark ドキュメント](https://docs.groupdocs.com/watermark/java/) +- [API リファレンス](https://reference.groupdocs.com/watermark/java) +- [GroupDocs.Watermark for Java のダウンロード](https://releases.groupdocs.com/watermark/java/) +- [GitHub リポジトリ](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [無料サポートフォーラム](https://forum.groupdocs.com/c/watermark/10) +- [一時ライセンス申請](https://purchase.groupdocs.com/temporary-license/) + +--- + +**最終更新日:** 2026-07-30 +**テスト環境:** GroupDocs.Watermark 23.9 for Java +**作者:** GroupDocs + +## 関連チュートリアル +- [GroupDocs.Watermark for Java を使用して PDF にテキスト透かしを追加する方法 (2023 ガイド)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [GroupDocs.Watermark for Java を使用して特定の PDF ページにテキストと画像の透かしを追加する方法](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Java で GroupDocs.Watermark を使用して PDF アーティファクトにアクセスし反復処理する方法（ドキュメント透かし）](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/korean/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/korean/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..b82c5967f --- /dev/null +++ b/content/korean/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,261 @@ +--- +date: '2026-07-30' +description: Java에서 GroupDocs.Watermark의 License를 설정하는 방법을 배우고, 문서를 효과적으로 보호하며 사용량을 + 효율적으로 관리하세요. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Java에서 GroupDocs.Watermark의 License를 설정하는 방법. 이 가이드는 SDK 설치, metered + key 획득, 그리고 License 구성을 통해 문서를 보호하는 과정을 안내합니다. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Java에서 GroupDocs Watermark License 설정 방법 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Java에서 GroupDocs Watermark License 설정 방법 +type: docs +url: /ko/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# GroupDocs Watermark의 Java 라이선스 설정 방법 + +지적 재산 보호는 현대 애플리케이션에서 최우선 과제이며, 워터마크는 무단 배포를 방지하는 검증된 방법입니다. **GroupDocs.Watermark for Java**를 사용하고 있다면 사용량을 추적하고 수요에 맞게 확장할 수 있는 라이선스가 필요합니다. 이 튜토리얼에서는 SDK 설치부터 사용량을 서비스에 보고하는 메터드 키 구성까지 Java에서 GroupDocs.Watermark의 **라이선스 설정 방법**을 설명합니다. + +## 빠른 답변 +- **메터드 라이선스란?** 사용량 기반 라이선스로, 각 API 호출을 기록하여 사용한 만큼만 비용을 지불할 수 있습니다. +- **먼저 체험판이 필요합니까?** 예, 제품을 평가하기 위해 GroupDocs 사이트에서 임시 라이선스를 요청할 수 있습니다. +- **필요한 Java 버전은?** Java 8 이상; SDK는 JDK 8+용으로 컴파일되었습니다. +- **나중에 영구 라이선스로 전환할 수 있나요?** 물론입니다 – 메터드 키를 영구 라이선스 파일로 교체하면 됩니다. +- **Maven과 호환되나요?** 예, 원활한 의존성 관리를 위해 Maven 좌표가 제공됩니다. + +## GroupDocs Watermark의 메터드 라이선스란? +메터드 라이선스는 GroupDocs에서 제공하는 클라우드 기반 권한으로, SDK가 수행하는 각 워터마크 작업을 기록합니다. 각 API 호출은 GroupDocs 라이선스 서버에 로그로 남겨 실제 사용량에 따라 종량제 청구가 가능합니다. 이 모델은 개발자에게 실시간 사용량 인사이트를 제공하고 비용을 관리하면서 전체 기능 접근을 보장합니다. + +## GroupDocs Watermark와 메터드 라이선스를 사용하는 이유는? +GroupDocs.Watermark는 PDF, DOCX, PPTX 및 다양한 이미지 형식을 포함해 50개 이상의 입력·출력 형식을 지원하며, 전체 문서를 메모리에 로드하지 않고 최대 1 GB 파일을 처리할 수 있어 성능을 유지합니다. 메터드 라이선스를 사용하면 실제 수행한 작업에 대해서만 비용을 지불하게 되므로, 전체 기능에 대한 접근성을 유지하면서 비용 효율적으로 솔루션을 확장할 수 있습니다. + +## 전제 조건 +- **GroupDocs.Watermark for Java** 버전 24.11 이상. +- 설치 및 구성된 Java Development Kit (JDK) 8 이상. +- Maven 또는 수동 JAR 관리에 대한 기본 지식. +- GroupDocs 포털에서 발급받은 임시 또는 영구 라이선스 키. + +## Java에서 GroupDocs Watermark의 메터드 라이선스를 설정하는 방법은? +공개 키와 비공개 키를 로드하고 `Metered` 인스턴스를 생성한 뒤 라이선스를 적용합니다—세 단계로 간단히 수행됩니다. 이 방법은 모든 워터마크 요청이 계정에 기록되도록 보장하여 사용량을 완전히 파악할 수 있게 합니다. + +### 1단계: 공개 키와 비공개 키 정의 +임시 라이선스를 등록한 후 받은 키를 입력합니다. + +`Metered`는 메터드 라이선스와 사용량 추적을 처리하는 GroupDocs.Watermark 클래스입니다. +*코드에서 사용하기 전에 키를 안전한 위치(환경 변수, 암호화된 설정 등)에 보관하십시오.* + +### 2단계: Metered 클래스 인스턴스 생성 +키를 사용해 `Metered` 객체를 인스턴스화합니다. 이 객체는 초기화 시 워터마크 엔진에 전달됩니다. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### 3단계: 제공된 키를 사용하여 메터드 라이선스 설정 +`setLicense` 메서드(또는 동등한 API 호출)를 공개 키와 비공개 키와 함께 호출합니다. 설정이 완료되면 이후 모든 워터마크 작업이 사용량에 따라 청구됩니다. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **팁:** 키를 소스 제어에 포함하지 마세요. 비밀 관리자를 사용하거나 암호화된 속성 파일을 이용해 우발적인 노출을 방지하십시오. + +## GroupDocs.Watermark for Java 설정 + +### 설치 정보 + +Maven을 사용하거나 JAR를 직접 다운로드하여 프로젝트에 GroupDocs.Watermark를 통합합니다. + +**Maven 설정:** +`pom.xml` 파일에 다음 구성을 추가합니다: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**직접 다운로드:** +[GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/)에서 최신 버전을 다운로드합니다. + +### 라이선스 획득 + +전체 기능을 사용하려면 무료 체험판 또는 임시 라이선스를 획득하십시오: + +- [GroupDocs 웹사이트](https://purchase.groupdocs.com/temporary-license/)에 가입하여 시작합니다. +- 키를 획득한 후 구현 가이드에 따라 프로젝트에 통합합니다. + +### 기본 초기화 및 설정 + +SDK를 프로젝트에 추가하면 필요한 네임스페이스를 import하고 위의 코드 스니펫에서 보여준 대로 워터마크 엔진 인스턴스를 생성합니다. + +## 문제 해결 팁 +- **키 오류:** 공개 키와 비공개 키가 정확히 일치하는지 다시 확인하십시오; 한 글자 오타만으로도 활성화가 실패합니다. +- **라이선스 파일 경로 오류:** 파일 기반 라이선스를 사용하려면 파일 경로가 절대 경로이거나 작업 디렉터리를 기준으로 올바르게 해석되는지 확인하십시오. +- **네트워크 문제:** 메터드 라이선스는 외부 HTTPS 호출이 필요합니다; 방화벽이 `api.groupdocs.com`으로의 트래픽을 허용하는지 확인하십시오. + +## 실제 적용 사례 +1. **문서 보안:** PDF, Word 문서 및 이미지에 눈에 보이거나 보이지 않는 워터마크를 추가하여 민감한 기업 데이터를 보호합니다. +2. **사용량 추적:** 하루에 워터마크가 적용된 문서 수에 대한 보고서를 생성하여 예산 책정 및 규정 준수에 활용합니다. +3. **CMS 통합:** 콘텐츠 게시 워크플로우 중 워터마크 삽입을 자동화하고 라이선스를 자동으로 적용합니다. + +## 성능 고려 사항 + +**성능 최적화:** +- 필요할 때만 워터마크를 적용하고 이미 보호된 파일은 처리하지 않습니다. +- 대량 배치에서는 동일한 `WatermarkEngine` 인스턴스를 재사용하여 초기화 오버헤드를 줄입니다. + +**모범 사례:** +- 수백 페이지 PDF를 처리할 때 JVM 힙 사용량을 모니터링하고 메모리 병목 현상이 발생하면 스트리밍 API를 고려하십시오. +- 콘솔을 과부하하지 않도록 `INFO` 수준에서 로깅을 활성화하여 라이선스 호출을 기록합니다. + +## 결론 + +이 가이드에서는 Maven 설치부터 메터드 키 구성까지 Java에서 GroupDocs.Watermark의 **라이선스 설정 방법**을 다루었습니다. 단계대로 진행하면 정확한 사용량 추적, 유연한 청구, 강력한 문서 보호를 얻을 수 있으며 성능 저하 없이 구현할 수 있습니다. + +**다음 단계:** +- 다양한 워터마크 스타일(텍스트, 이미지, 대각선)을 실험해 보세요. +- 사용자 역할에 기반한 조건부 워터마크와 같은 고급 기능을 탐색하십시오. +- 사용량 추세를 모니터링하기 위해 GroupDocs 분석 대시보드를 검토하십시오. + +문서를 보호할 준비가 되셨나요? 오늘 솔루션을 구현하여 자산이 보호되고 라이선스 비용이 투명함을 확인하십시오. + +## 자주 묻는 질문 + +**Q: 임시 라이선스와 영구 라이선스의 차이점은 무엇인가요?** +A: 임시 라이선스는 기간이 제한되어 평가에 적합하며, 영구 라이선스는 반복 비용 없이 무제한 사용을 제공합니다. + +**Q: 코드를 변경하지 않고 메터드 라이선스에서 영구 라이선스로 전환할 수 있나요?** +A: 예—메터드 키 초기화를 `engine.setLicense("path/to/license/file")` 호출로 교체하면 됩니다. + +**Q: 메터드 서비스에 연결할 수 없으면 어떻게 되나요?** +A: SDK가 오프라인 모드로 전환됩니다; 워터마크는 계속되지만 연결이 복구될 때까지 사용량이 보고되지 않습니다. + +**Q: 워터마크 적용에 파일 크기 제한이 있나요?** +A: SDK는 최대 1 GB 파일을 처리할 수 있으며, 더 큰 파일은 분할하거나 스트리밍 모드로 처리해야 합니다. + +**Q: 메터드 라이선스는 모든 운영 체제에서 작동하나요?** +A: Java 8+를 지원하는 모든 플랫폼에서 작동합니다. Windows, Linux, macOS 포함. + +--- + +**마지막 업데이트:** 2026-07-30 +**테스트 환경:** GroupDocs.Watermark 24.11 for Java +**작성자:** GroupDocs + +**리소스** +- [문서](https://docs.groupdocs.com/watermark/java/) +- [API 레퍼런스](https://reference.groupdocs.com/watermark/java) +- [다운로드](https://releases.groupdocs.com/watermark/java/) +- [GitHub 저장소](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [무료 지원 포럼](https://forum.groupdocs.com/c/watermark/10) +- [임시 라이선스 획득](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## 관련 튜토리얼 + +- [GroupDocs.Watermark for Java 라이선스 및 구성 튜토리얼](/watermark/java/licensing-configuration/) +- [Java에서 GroupDocs.Watermark 라이선스 설정 방법: 완전 가이드](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java 워터마크 가이드: GroupDocs.Watermark API로 문서 보호](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/korean/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/korean/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..db935408f --- /dev/null +++ b/content/korean/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,250 @@ +--- +date: '2026-07-30' +description: GroupDocs.Watermark를 사용하여 PDF 이미지 주석에 텍스트 워터마크를 추가함으로써 Java에서 PDF에 워터마크를 + 적용하고 문서를 효과적으로 보호하는 방법을 배웁니다. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: GroupDocs.Watermark와 함께 PDF 이미지 주석에 텍스트 워터마크를 추가하여 Java에서 PDF에 워터마크를 + 적용합니다. 문서를 빠르고 신뢰성 있게 보호하세요. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Java에서 PDF에 워터마크 삽입 – 이미지 주석에 텍스트 추가 +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Java에서 PDF에 워터마크 삽입 – 이미지 주석에 텍스트 추가 +type: docs +url: /ko/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Java에서 PDF 워터마크 – 이미지 주석에 텍스트 추가 + +PDF 파일을 무단 배포로부터 보호하는 것은 개발자에게 매일 같은 고민입니다. **Watermark PDF Java**는 이미지 주석에 직접 눈에 보이는 텍스트를 삽입할 수 있게 하여, 모든 페이지에 브랜드 또는 기밀성 알림이 포함되도록 합니다. 이 튜토리얼에서는 이 접근 방식이 왜 신뢰할 수 있는지, 시작에 필요한 것이 무엇인지, 그리고 GroupDocs.Watermark for Java를 사용한 단계별 구현을 살펴봅니다. + +## 빠른 답변 +- **라이브러리는 무엇을 하나요?** PDF, Word, Excel 및 이미지 파일에 워터마크를 추가, 편집 또는 제거합니다. +- **워터마크를 생성하는 주요 메서드는 무엇인가요?** `Watermark.add()`를 `Annotation` 객체에 적용합니다. +- **개발에 라이선스가 필요합니까?** 무료 체험판으로 테스트가 가능하지만, 프로덕션에서는 영구 라이선스가 필요합니다. +- **대용량 PDF를 처리할 수 있나요?** 예 – API가 페이지를 스트리밍하여 전체 문서를 메모리에 로드하지 않고 500 MB 이상의 파일을 처리합니다. +- **솔루션이 스레드 안전한가요?** 모든 공개 메서드는 상태가 없으므로 여러 인스턴스를 병렬로 안전하게 실행할 수 있습니다. + +## watermark pdf java란? +`watermark pdf java`는 일반적으로 GroupDocs.Watermark와 같은 라이브러리를 사용하여 Java 코드에서 PDF 문서에 시각적 워터마크를 추가하는 기능을 의미합니다. 파일 내부에 직접 소유권, 기밀성 또는 브랜드를 적용하면서 원본 레이아웃을 유지하고 외관 및 위치에 대한 세밀한 제어를 가능하게 합니다. + +## Java용 GroupDocs.Watermark를 사용하는 이유 +GroupDocs.Watermark는 **50개 이상의 입력 및 출력 형식**을 지원하고, 표준 하드웨어에서 2 초 미만으로 수백 페이지 PDF를 처리하며 전체 PDF 뷰어를 설치할 필요가 없습니다. 주석 인식 엔진은 원본 레이아웃을 유지하면서 투명도, 회전 및 글꼴 스타일을 조정할 수 있는 텍스트 워터마크를 삽입하므로 엔터프라이즈 수준 워터마킹에 빠르고 신뢰할 수 있는 선택입니다. + +## 사전 요구 사항 +- **Java Development Kit (JDK)** 8 이상. +- **Maven**(또는 수동 JAR 포함)으로 의존성 관리. +- PDF 구조와 Java 프로그래밍 개념에 대한 기본적인 이해. + +## Java에서 PDF 워터마킹을 위한 사전 요구 사항은 무엇인가요? +호환되는 JDK, Maven(또는 JAR 파일) 및 유효한 GroupDocs.Watermark 라이선스가 필요합니다. 이 라이브러리는 Java 8+를 지원하는 모든 OS에서 실행되며, Java 11, 17 및 최신 LTS 릴리스에서도 작동합니다. 또한 대용량 PDF를 처리하기 위해 프로젝트에 충분한 힙 메모리(최소 2 GB)가 확보되어 있는지, 출력 디렉터리에 대한 쓰기 권한이 있는지 확인하십시오. + +## Java용 GroupDocs.Watermark 설정 +코드를 작성하기 전에 라이브러리를 프로젝트에 추가하십시오. + +### Maven 설정 +다음 내용을 `pom.xml` 파일에 추가하십시오: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### 직접 다운로드 +또는 [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/)에서 최신 버전을 다운로드하십시오. + +#### 라이선스 획득 +- **Free Trial** – 비용 없이 핵심 기능을 탐색합니다. +- **Temporary License** – 개발 중에 전체 기능을 사용할 수 있습니다. +- **Purchase** – 프로덕션 사용 및 프리미엄 지원을 위한 영구 라이선스를 획득합니다. + +### 기본 초기화 +`Watermark`는 문서를 로드하고 워터마크 객체를 적용한 뒤 결과를 저장하는 진입점 클래스입니다. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## GroupDocs.Watermark for Java를 사용하여 PDF 이미지 주석에 텍스트 워터마크를 추가하는 방법 +`Watermark.load()`는 PDF 문서를 Watermark API에 로드합니다. `TextWatermark`는 글꼴, 크기, 색상, 투명도 및 회전을 사용자 지정할 수 있는 텍스트 워터마크를 나타냅니다. `ImageAnnotation`은 임베디드 이미지를 포함하는 PDF 주석으로, 워터마크 대상이 될 수 있습니다. `annotation.addWatermark()`는 생성된 워터마크를 주석에 첨부하고, `watermark.save()`는 수정된 문서를 지정된 경로에 저장합니다. + +`Watermark.load("sample.pdf")`로 PDF를 로드하고, `TextWatermark` 인스턴스를 생성한 뒤 각 `ImageAnnotation`을 반복하면서 `annotation.addWatermark(textWatermark)`를 호출합니다. 마지막으로 `watermark.save("output.pdf")`으로 수정된 문서를 저장합니다. 이 간결한 흐름은 단일 패스로 모든 주석을 처리하고 원본 주석 메타데이터를 유지합니다. + +### PDF 이미지 주석에 텍스트 워터마크 추가 +다음 섹션에서는 각 단계를 자세히 설명합니다. + +#### 단계 1: PDF 문서 로드 +API가 주석 객체를 검사할 수 있도록 대상 PDF 파일을 엽니다. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### 단계 2: 텍스트 워터마크 생성 +`TextWatermark`는 글꼴, 크기, 색상, 투명도 및 회전을 사용자 지정할 수 있는 텍스트 워터마크를 나타냅니다. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### 단계 3: 주석에 워터마크 적용 +`ImageAnnotation`은 임베디드 이미지를 포함하는 PDF 주석으로, 워터마크 대상이 될 수 있습니다. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### 단계 4: 워터마크가 적용된 PDF 저장 +`watermark.save()`는 수정된 문서를 지정된 경로에 저장합니다. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## 일반적인 문제 및 해결책 +- **Missing Dependencies** – 모든 GroupDocs 아티팩트가 `pom.xml`에 나열되어 있는지 확인하십시오. +- **File Path Issues** – 절대 경로 또는 `Paths.get()`을 사용하여 상대 경로로 인한 문제를 방지하십시오. +- **Unsupported Annotation Types** – 현재 API는 `ImageAnnotation`, `TextAnnotation`, `StampAnnotation`을 지원하며, 다른 유형은 사용자 정의 처리가 필요합니다. + +## 실용적인 적용 사례 +PDF 이미지 주석에 텍스트 워터마크를 추가하는 것은 특히 다음에 유용합니다: +1. **Legal Documents** – 계약서에 “Confidential – For Internal Use Only”(기밀 – 내부 사용 전용) 라벨을 표시합니다. +2. **Confidential Reports** – 회사 전체 라벨을 삽입하여 우발적인 유출을 방지합니다. +3. **Marketing Materials** – 미묘한 로고‑텍스트 오버레이로 홍보용 PDF에 브랜드를 입힙니다. +4. **Academic Drafts** – 동료 검토 전 연구 논문에 “Draft – Do Not Distribute”(초안 – 배포 금지) 라벨을 표시합니다. + +## 성능 고려 사항 +- **Batch Processing** – 여러 PDF를 하나의 스레드 풀에 그룹화하여 JVM 오버헤드를 최소화합니다. +- **Memory Management** – 라이브러리가 페이지를 스트리밍하므로 200 MB보다 큰 파일에 대해 최소 2 GB 힙을 할당하십시오. +- **Watermark Settings** – 투명도를 낮추면(예: 30 %) 시각적 혼란을 줄이면서도 감지 가능성을 유지합니다. + +## 자주 묻는 질문 + +**Q: 다른 주석 유형에도 워터마크를 추가할 수 있나요?** +A: 예, 동일한 `addWatermark` 메서드를 사용하여 `TextAnnotation`, `StampAnnotation` 또는 사용자 정의 주석 객체를 대상으로 할 수 있습니다. + +**Q: 페이지에 배치할 수 있는 워터마크 수에 제한이 있나요?** +A: 명확한 제한은 없지만, 가독성을 유지하고 성능 저하를 방지하기 위해 전체 투명도를 70 % 이하로 유지하십시오. + +**Q: 적용된 워터마크를 어떻게 제거하나요?** +A: `annotation.removeWatermark(watermarkId)`를 사용하거나 `Watermark.removeAll()`을 호출하여 문서의 모든 워터마크를 제거합니다. + +**Q: 라이브러리가 비밀번호로 보호된 PDF를 처리하나요?** +A: 예 – 문서를 로드할 때 비밀번호를 제공하면 됩니다: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: 지원되는 최대 파일 크기는 얼마인가요?** +A: API는 64‑bit JVM에서 최대 2 GB까지 파일을 처리할 수 있으며, 더 큰 파일은 워터마크 적용 전에 섹션으로 분할해야 합니다. + +## 리소스 +- [GroupDocs.Watermark 문서](https://docs.groupdocs.com/watermark/java/) +- [API 레퍼런스](https://reference.groupdocs.com/watermark/java) +- [GroupDocs.Watermark for Java 다운로드](https://releases.groupdocs.com/watermark/java/) +- [GitHub 저장소](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [무료 지원 포럼](https://forum.groupdocs.com/c/watermark/10) +- [임시 라이선스 신청](https://purchase.groupdocs.com/temporary-license/) + +--- + +**마지막 업데이트:** 2026-07-30 +**테스트 환경:** GroupDocs.Watermark 23.9 for Java +**작성자:** GroupDocs + +## 관련 튜토리얼 +- [GroupDocs.Watermark for Java를 사용하여 PDF에 텍스트 워터마크 추가 방법 (2023 가이드)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [GroupDocs.Watermark for Java를 사용하여 특정 PDF 페이지에 텍스트 및 이미지 워터마크 추가 방법](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Java에서 GroupDocs.Watermark를 사용하여 PDF 아티팩트에 접근하고 반복하기 (문서 워터마킹)](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/polish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/polish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..0bdaafcf1 --- /dev/null +++ b/content/polish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Dowiedz się, jak ustawić licencję dla GroupDocs.Watermark w Java, skutecznie + chronić swoje documents i efektywnie zarządzać usage. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Jak ustawić licencję dla GroupDocs.Watermark w Java. Ten przewodnik + przeprowadzi Cię przez instalację SDK, uzyskanie metered key oraz konfigurację licencji + w celu zabezpieczenia twoich documents. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Jak ustawić licencję dla GroupDocs Watermark w Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Jak ustawić licencję dla GroupDocs Watermark w Java +type: docs +url: /pl/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Jak ustawić licencję dla GroupDocs Watermark w Javie + +Ochrona własności intelektualnej jest priorytetem dla nowoczesnych aplikacji, a znaki wodne są sprawdzonym sposobem na zniechęcenie nieautoryzowanej dystrybucji. Jeśli używasz **GroupDocs.Watermark for Java**, będziesz potrzebować licencji, która może śledzić użycie i skalować się wraz z zapotrzebowaniem. Ten samouczek wyjaśnia **jak ustawić licencję** dla GroupDocs.Watermark w Javie, od instalacji SDK po skonfigurowanie licencji metrowanej, która raportuje zużycie do usługi. + +## Szybkie odpowiedzi +- **Czym jest licencja metrowana?** To licencja oparta na zużyciu, która rejestruje każde wywołanie API, pozwalając płacić tylko za to, co zużyjesz. +- **Czy najpierw potrzebna jest wersja próbna?** Tak, możesz poprosić o tymczasową licencję na stronie GroupDocs, aby ocenić produkt. +- **Jaka wersja Javy jest wymagana?** Java 8 lub nowsza; SDK jest skompilowane dla JDK 8+. +- **Czy mogę później przejść na licencję wieczystą?** Oczywiście – wystarczy zamienić klucze metrowane na plik licencji stałej. +- **Czy konfiguracja jest kompatybilna z Maven?** Tak, współrzędne Maven są podane dla bezproblemowego zarządzania zależnościami. + +## Czym jest licencja metrowana dla GroupDocs Watermark? +Licencja metrowana to uprawnienie włączone w chmurze, dostarczane przez GroupDocs, które rejestruje każdą operację znakowania wykonaną przez SDK. Każde wywołanie API jest logowane na serwerze licencyjnym GroupDocs, umożliwiając rozliczanie w modelu płatności za faktyczne użycie. Ten model daje programistom wgląd w czasie rzeczywistym w zużycie i pomaga kontrolować koszty, zapewniając jednocześnie pełny dostęp do funkcji. + +## Dlaczego warto używać licencji metrowanej z GroupDocs Watermark? +GroupDocs.Watermark obsługuje ponad pięćdziesiąt formatów wejściowych i wyjściowych — w tym PDF, DOCX, PPTX oraz różne typy obrazów — i może przetwarzać pliki do 1 GB bez ładowania całego dokumentu do pamięci, co zachowuje wydajność. Korzystając z licencji metrowanej płacisz tylko za operacje, które faktycznie wykonujesz, co pozwala rozwiązaniu skalować się kosztowo efektywnie, zachowując pełny dostęp do wszystkich funkcji. + +## Wymagania wstępne +- **GroupDocs.Watermark for Java** wersja 24.11 lub nowsza. +- Zestaw Java Development Kit (JDK) 8 lub nowszy, zainstalowany i skonfigurowany. +- Podstawowa znajomość Maven lub ręcznego zarządzania plikami JAR. +- Tymczasowy lub stały klucz licencyjny z portalu GroupDocs. + +## Jak ustawić licencję metrowaną dla GroupDocs Watermark w Javie? + +Wczytaj swoje klucze publiczny i prywatny, utwórz instancję `Metered` i zastosuj licencję — wszystko w trzech zwięzłych krokach. Takie podejście zapewnia, że każde żądanie znakowania jest liczone na Twoim koncie, dając pełną widoczność zużycia. + +### Krok 1: Zdefiniuj klucze publiczny i prywatny +Wprowadź klucze, które otrzymałeś po zarejestrowaniu się po tymczasową licencję. + +`Metered` to klasa GroupDocs.Watermark obsługująca licencjonowanie metrowane i śledzenie użycia. +*Umieść swoje klucze w bezpiecznym miejscu (zmienne środowiskowe, zaszyfrowana konfiguracja itp.) przed użyciem ich w kodzie.* + +### Krok 2: Utwórz instancję klasy Metered +Zainicjalizuj obiekt `Metered` przy użyciu swoich kluczy. Ten obiekt zostanie przekazany do silnika znakowania podczas inicjalizacji. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Krok 3: Ustaw licencję metrowaną przy użyciu podanych kluczy +Wywołaj metodę `setLicense` (lub równoważne wywołanie API) z użyciem swojego klucza publicznego i prywatnego. Po ustawieniu wszystkie kolejne operacje znakowania będą rozliczane zgodnie z Twoim zużyciem. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Wskazówka:** Trzymaj klucze poza kontrolą wersji. Użyj menedżera sekretów lub zaszyfrowanego pliku właściwości, aby uniknąć przypadkowego ujawnienia. + +## Konfiguracja GroupDocs.Watermark dla Javy + +### Informacje o instalacji + +Zintegruj GroupDocs.Watermark w swoim projekcie przy użyciu Maven lub pobierając plik JAR bezpośrednio. + +**Konfiguracja Maven:** +Dodaj następującą konfigurację w pliku `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Bezpośrednie pobranie:** +Pobierz najnowszą wersję z [wydania GroupDocs.Watermark dla Javy](https://releases.groupdocs.com/watermark/java/). + +### Uzyskanie licencji + +Aby odblokować pełną funkcjonalność, uzyskaj darmową wersję próbną lub tymczasową licencję: +- Zarejestruj się na [stronie GroupDocs](https://purchase.groupdocs.com/temporary-license/), aby rozpocząć. +- Po uzyskaniu kluczy, zintegrować je w projekcie zgodnie z przewodnikiem implementacji. + +### Podstawowa inicjalizacja i konfiguracja + +Po dodaniu SDK do projektu, zaimportuj niezbędne przestrzenie nazw i utwórz instancję silnika znakowania, jak pokazano w powyższych fragmentach kodu. + +## Porady dotyczące rozwiązywania problemów +- **Nieprawidłowe klucze:** Sprawdź dokładnie, czy klucze publiczny i prywatny są identyczne; pojedynczy błąd literowy uniemożliwi aktywację. +- **Błędy ścieżki do pliku licencji:** Jeśli wolisz licencję opartą na pliku, upewnij się, że ścieżka do pliku jest bezwzględna lub poprawnie rozwiązywana względem katalogu roboczego. +- **Problemy sieciowe:** Licencjonowanie metrowane wymaga wychodzących połączeń HTTPS; sprawdź, czy zapora sieciowa zezwala na ruch do `api.groupdocs.com`. + +## Praktyczne zastosowania +1. **Bezpieczeństwo dokumentów:** Dodaj widoczne lub niewidoczne znaki wodne do plików PDF, dokumentów Word i obrazów, aby chronić wrażliwe dane firmowe. +2. **Śledzenie użycia:** Generuj raporty o liczbie dokumentów oznaczonych znakami wodnymi dziennie, przydatne do budżetowania i zgodności. +3. **Integracja z CMS:** Automatyzuj wstawianie znaków wodnych w trakcie przepływu publikacji treści, przy czym licencjonowanie jest egzekwowane automatycznie. + +## Rozważania dotyczące wydajności + +**Optymalizacja wydajności:** +- Nakładaj znaki wodne tylko wtedy, gdy jest to konieczne; pomijaj przetwarzanie już zabezpieczonych plików. +- W przypadku dużych partii, ponownie używaj tej samej instancji `WatermarkEngine`, aby uniknąć powtarzającego się kosztu inicjalizacji. + +**Najlepsze praktyki:** +- Monitoruj zużycie pamięci JVM przy przetwarzaniu PDF‑ów o setkach stron; rozważ API strumieniowe, jeśli pamięć stanie się wąskim gardłem. +- Włącz logowanie na poziomie `INFO`, aby rejestrować wywołania licencyjne bez przeładowywania konsoli. + +## Zakończenie + +W tym przewodniku omówiliśmy **jak ustawić licencję** dla GroupDocs.Watermark w Javie, od instalacji Maven po konfigurację klucza metrowanego. Postępując zgodnie z krokami, uzyskasz precyzyjne śledzenie użycia, elastyczne rozliczenia i solidną ochronę dokumentów — wszystko bez utraty wydajności. + +**Kolejne kroki:** +- Eksperymentuj z różnymi stylami znaków wodnych (tekst, obraz, diagonalny). +- Poznaj zaawansowane funkcje, takie jak warunkowe znaki wodne w zależności od ról użytkowników. +- Przejrzyj pulpit nawigacyjny analityki GroupDocs, aby monitorować trendy zużycia. + +Gotowy, aby zabezpieczyć swoje dokumenty? Zaimplementuj rozwiązanie już dziś i ciesz się spokojem, wiedząc, że Twoje zasoby są chronione, a koszty licencji przejrzyste. + +## Najczęściej zadawane pytania + +**Q: Jaka jest różnica między licencją tymczasową a licencją wieczystą?** +A: Licencja tymczasowa jest ograniczona czasowo i idealna do oceny, natomiast licencja wieczysta zapewnia nieograniczone użycie bez opłat cyklicznych. + +**Q: Czy mogę przejść z licencji metrowanej na wieczystą bez zmian w kodzie?** +A: Tak — zamień inicjalizację klucza metrowanego na wywołanie `engine.setLicense("path/to/license/file")`. + +**Q: Co się stanie, jeśli usługa metrowana będzie nieosiągalna?** +A: SDK przełącza się w tryb offline; znakowanie kontynuuje, ale zużycie nie będzie raportowane, dopóki połączenie nie zostanie przywrócone. + +**Q: Czy istnieją limity rozmiaru plików dla znakowania?** +A: SDK obsługuje pliki do 1 GB; większe pliki należy podzielić lub przetwarzać w trybie strumieniowym. + +**Q: Czy licencja metrowana działa na wszystkich systemach operacyjnych?** +A: Działa na każdej platformie obsługującej Java 8+, w tym Windows, Linux i macOS. + +--- + +**Ostatnia aktualizacja:** 2026-07-30 +**Testowano z:** GroupDocs.Watermark 24.11 dla Javy +**Autor:** GroupDocs + +**Zasoby** + +- [Dokumentacja](https://docs.groupdocs.com/watermark/java/) +- [Referencja API](https://reference.groupdocs.com/watermark/java) +- [Pobierz](https://releases.groupdocs.com/watermark/java/) +- [Repozytorium GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Darmowe forum wsparcia](https://forum.groupdocs.com/c/watermark/10) +- [Uzyskanie tymczasowej licencji](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Powiązane samouczki + +- [Samouczki dotyczące licencjonowania i konfiguracji GroupDocs.Watermark dla Javy](/watermark/java/licensing-configuration/) +- [Jak skonfigurować licencjonowanie GroupDocs.Watermark w Javie: kompletny przewodnik](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Przewodnik po znakowaniu w Javie: zabezpiecz dokumenty za pomocą API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/polish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/polish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..3aa611927 --- /dev/null +++ b/content/polish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,251 @@ +--- +date: '2026-07-30' +description: Dowiedz się, jak watermark PDF w Java, dodając text watermark do PDF + image annotations przy użyciu GroupDocs.Watermark, skutecznie chroniąc swoje dokumenty. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF w Java, dodając text watermark do PDF image annotations + przy użyciu GroupDocs.Watermark. Zabezpiecz swoje dokumenty szybko i niezawodnie. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF w Java – Dodaj tekst do Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF w Java – Dodaj tekst do Image Annotations +type: docs +url: /pl/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Znak wodny PDF w Javie – Dodaj tekst do adnotacji obrazów + +Chronienie plików PDF przed nieautoryzowanym rozpowszechnianiem jest codziennym problemem dla programistów. **Watermark PDF Java** pozwala osadzić widoczny tekst bezpośrednio na adnotacjach obrazów, zapewniając, że każda strona zawiera Twoje logo lub informację poufności. W tym samouczku zobaczysz, dlaczego to podejście jest niezawodne, co jest potrzebne do rozpoczęcia oraz implementację krok po kroku przy użyciu GroupDocs.Watermark dla Javy. + +## Szybkie odpowiedzi +- **Co robi biblioteka?** Dodaje, edytuje lub usuwa znaki wodne w plikach PDF, Word, Excel i obrazach. +- **Która główna metoda tworzy znak wodny?** `Watermark.add()` zastosowana do obiektu `Annotation`. +- **Czy potrzebuję licencji do rozwoju?** Darmowa wersja próbna działa do testów; stała licencja jest wymagana w produkcji. +- **Czy mogę przetwarzać duże pliki PDF?** Tak – API strumieniuje strony, obsługując pliki > 500 MB bez ładowania całego dokumentu do pamięci. +- **Czy rozwiązanie jest wątkowo‑bezpieczne?** Wszystkie publiczne metody są bezstanowe, więc możesz bezpiecznie uruchamiać wiele instancji równolegle. + +## Czym jest watermark pdf java? +`watermark pdf java` odnosi się do możliwości dodawania wizualnych znaków wodnych do dokumentów PDF z kodu Java, zazwyczaj przy użyciu biblioteki takiej jak GroupDocs.Watermark. Pomaga to wymusić własność, poufność lub branding bezpośrednio w pliku, zachowując oryginalny układ i umożliwiając precyzyjną kontrolę nad wyglądem i pozycjonowaniem. + +## Dlaczego używać GroupDocs.Watermark dla Javy? +GroupDocs.Watermark obsługuje **ponad 50 formatów wejściowych i wyjściowych**, przetwarza wielostronicowe PDF‑y w mniej niż 2 sekundy na standardowym sprzęcie i nie wymaga zainstalowanego pełnego przeglądarki PDF. Jego silnik świadomy adnotacji zachowuje oryginalny układ, jednocześnie wstawiając tekstowe znaki wodne z regulowaną przezroczystością, rotacją i stylizacją czcionki, co czyni go szybkim i niezawodnym wyborem do znakowania na poziomie przedsiębiorstwa. + +## Wymagania wstępne +- **Java Development Kit (JDK)** 8 lub wyższy. +- **Maven** (lub ręczne dołączanie JAR‑ów) do zarządzania zależnościami. +- Podstawowa znajomość struktury PDF oraz koncepcji programowania w Javie. + +## Jakie są wymagania wstępne do znakowania PDF‑ów w Javie? +Potrzebujesz kompatybilnego JDK, Maven (lub plików JAR) oraz ważnej licencji GroupDocs.Watermark. Biblioteka działa na każdym systemie operacyjnym obsługującym Java 8+, i współpracuje z Java 11, 17 oraz nowszymi wersjami LTS. Dodatkowo, upewnij się, że Twój projekt ma wystarczającą pamięć heap (co najmniej 2 GB) do przetwarzania dużych PDF‑ów oraz że masz uprawnienia zapisu do katalogu wyjściowego. + +## Konfiguracja GroupDocs.Watermark dla Javy +Zanim napiszesz jakikolwiek kod, dodaj bibliotekę do swojego projektu. + +### Konfiguracja Maven +Add the following to your `pom.xml` file: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Bezpośrednie pobranie +Alternatywnie, pobierz najnowszą wersję z [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Uzyskanie licencji +- **Free Trial** – przetestuj podstawowe funkcje bez opłat. +- **Temporary License** – odblokuj pełne możliwości podczas rozwoju. +- **Purchase** – uzyskaj stałą licencję do użytku produkcyjnego i wsparcie premium. + +### Podstawowa inicjalizacja +`Watermark` jest klasą wejściową, która ładuje dokument, stosuje obiekty znaków wodnych i zapisuje wynik. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Jak dodać tekstowy znak wodny do adnotacji obrazów PDF przy użyciu GroupDocs.Watermark dla Javy? +`Watermark.load()` ładuje dokument PDF do API Watermark w celu przetworzenia. `TextWatermark` reprezentuje tekstowy znak wodny z możliwością dostosowania czcionki, rozmiaru, koloru, przezroczystości i rotacji. `ImageAnnotation` jest adnotacją PDF zawierającą osadzony obraz, którą można poddać znakowaniu. `annotation.addWatermark()` dołącza utworzony znak wodny do adnotacji, a `watermark.save()` zapisuje zmodyfikowany dokument w określonej ścieżce. + +Załaduj swój PDF za pomocą `Watermark.load("sample.pdf")`, utwórz instancję `TextWatermark`, przeiteruj każdą `ImageAnnotation` i wywołaj `annotation.addWatermark(textWatermark)`. Na koniec zapisz zmodyfikowany dokument przy użyciu `watermark.save("output.pdf")`. Ten zwięzły przepływ obsługuje dowolną liczbę adnotacji w jednym przebiegu i zachowuje oryginalne metadane adnotacji. + +### Dodawanie tekstowego znaku wodnego do adnotacji obrazów PDF +Poniższe sekcje opisują każdy krok. + +#### Krok 1: Załaduj dokument PDF +Otwórz docelowy plik PDF, aby API mogło przeglądać jego obiekty adnotacji. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Krok 2: Utwórz tekstowy znak wodny +`TextWatermark` reprezentuje tekstowy znak wodny z możliwością dostosowania czcionki, rozmiaru, koloru, przezroczystości i rotacji. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Krok 3: Zastosuj znak wodny do adnotacji +`ImageAnnotation` jest adnotacją PDF zawierającą osadzony obraz, którą można poddać znakowaniu. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Krok 4: Zapisz oznaczony znakami wodnymi PDF +`watermark.save()` zapisuje zmodyfikowany dokument w określonej ścieżce. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Typowe problemy i rozwiązania +- **Missing Dependencies** – Sprawdź, czy wszystkie artefakty GroupDocs są wymienione w `pom.xml`. +- **File Path Issues** – Używaj ścieżek bezwzględnych lub `Paths.get()`, aby uniknąć niespodzianek związanych ze ścieżkami względnymi. +- **Unsupported Annotation Types** – API obecnie obsługuje `ImageAnnotation`, `TextAnnotation` i `StampAnnotation`; inne typy wymagają obsługi niestandardowej. + +## Praktyczne zastosowania +Dodawanie tekstowego znaku wodnego do adnotacji obrazów PDF jest szczególnie przydatne do: +1. **Dokumenty prawne** – Oznacz umowy jako „Poufne – wyłącznie do użytku wewnętrznego”. +2. **Raporty poufne** – Zapobiegaj przypadkowym wyciekom, osadzając etykietę obejmującą całą firmę. +3. **Materiały marketingowe** – Oznacz promocyjne PDF‑y subtelnym nakładaniem logo‑tekstu. +4. **Szkice akademickie** – Wskaż „Szkic – Nie rozpowszechniać” na pracach badawczych przed recenzją. + +## Rozważania dotyczące wydajności +- **Batch Processing** – Grupuj wiele PDF‑ów w jednym puli wątków, aby zminimalizować narzut JVM. +- **Memory Management** – Biblioteka strumieniuje strony, więc przydziel co najmniej 2 GB pamięci heap dla plików większych niż 200 MB. +- **Watermark Settings** – Niższa przezroczystość (np. 30 %) zmniejsza wizualny bałagan, pozostając jednocześnie wykrywalna. + +## Najczęściej zadawane pytania + +**Q: Czy mogę dodawać znaki wodne do innych typów adnotacji?** +A: Tak, możesz celować w `TextAnnotation`, `StampAnnotation` lub własne obiekty adnotacji, używając tej samej metody `addWatermark`. + +**Q: Czy istnieje limit liczby znaków wodnych, które mogę umieścić na stronie?** +A: Nie ma sztywnego limitu, ale utrzymuj łączną przezroczystość poniżej 70 %, aby zachować czytelność i uniknąć spadku wydajności. + +**Q: Jak usunąć znak wodny po jego zastosowaniu?** +A: Użyj `annotation.removeWatermark(watermarkId)` lub wywołaj `Watermark.removeAll()`, aby usunąć wszystkie znaki wodne z dokumentu. + +**Q: Czy biblioteka obsługuje PDF‑y zabezpieczone hasłem?** +A: Tak – podaj hasło podczas ładowania dokumentu: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Jaki jest maksymalny obsługiwany rozmiar pliku?** +A: API może przetwarzać pliki do 2 GB na 64‑bitowym JVM; większe pliki należy podzielić na sekcje przed znakowaniem. + +## Zasoby +- [Dokumentacja GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Referencja API](https://reference.groupdocs.com/watermark/java) +- [Pobierz GroupDocs.Watermark dla Javy](https://releases.groupdocs.com/watermark/java/) +- [Repozytorium GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Forum darmowego wsparcia](https://forum.groupdocs.com/c/watermark/10) +- [Aplikacja tymczasowej licencji](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Ostatnia aktualizacja:** 2026-07-30 +**Testowano z:** GroupDocs.Watermark 23.9 for Java +**Autor:** GroupDocs + +## Powiązane samouczki + +- [Jak dodać tekstowy znak wodny do PDF przy użyciu GroupDocs.Watermark dla Javy (przewodnik 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Jak dodać tekstowe i graficzne znaki wodne do określonych stron PDF przy użyciu GroupDocs.Watermark dla Javy](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Dostęp i iteracja po artefaktach PDF przy użyciu GroupDocs.Watermark w Javie do znakowania dokumentów](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/portuguese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/portuguese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..3bb0e1a1f --- /dev/null +++ b/content/portuguese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Aprenda como definir a licença do GroupDocs.Watermark em Java, proteja + seus documentos de forma eficaz e gerencie o uso com eficiência. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Como definir a licença do GroupDocs.Watermark em Java. Este guia orienta + você na instalação do SDK, na obtenção de uma chave medida e na configuração da + licença para proteger seus documentos. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Como definir a licença do GroupDocs Watermark em Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Como definir a licença do GroupDocs Watermark em Java +type: docs +url: /pt/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Como Definir Licença para GroupDocs Watermark em Java + +Proteger a propriedade intelectual é uma prioridade máxima para aplicativos modernos, e marcas d'água são uma forma comprovada de impedir a distribuição não autorizada. Se você está usando **GroupDocs.Watermark for Java**, precisará de uma licença que possa rastrear o uso e escalar conforme a demanda. Este tutorial explica **como definir licença** para GroupDocs.Watermark em Java, desde a instalação do SDK até a configuração de uma chave por consumo que relata o consumo ao serviço. + +## Respostas Rápidas +- **O que é uma licença por consumo?** É uma licença baseada em uso que registra cada chamada de API, permitindo que você pague apenas pelo que consome. +- **Preciso de um teste primeiro?** Sim, você pode solicitar uma licença temporária no site da GroupDocs para avaliar o produto. +- **Qual versão do Java é necessária?** Java 8 ou superior; o SDK é compilado para JDK 8+. +- **Posso mudar para uma licença perpétua depois?** Absolutamente – basta substituir as chaves de consumo por um arquivo de licença permanente. +- **A configuração é compatível com Maven?** Sim, as coordenadas Maven são fornecidas para gerenciamento de dependências sem esforço. + +## O que é uma licença por consumo para GroupDocs Watermark? +Uma licença por consumo é um direito habilitado na nuvem fornecido pela GroupDocs que registra cada operação de marca d'água realizada pelo SDK. Cada chamada de API é registrada no servidor de licenciamento da GroupDocs, permitindo cobrança pay‑as‑you‑go baseada no uso real. Esse modelo fornece aos desenvolvedores insight em tempo real sobre o consumo e ajuda a controlar custos, garantindo acesso total a todos os recursos. + +## Por que usar uma licença por consumo com GroupDocs Watermark? +GroupDocs.Watermark suporta mais de cinquenta formatos de entrada e saída — incluindo PDF, DOCX, PPTX e vários tipos de imagem — e pode processar arquivos de até 1 GB sem carregar todo o documento na memória, o que preserva o desempenho. Ao usar uma licença por consumo, você paga apenas pelas operações que realmente executa, permitindo que a solução escale de forma econômica enquanto mantém acesso total a todos os recursos. + +## Pré‑requisitos +- **GroupDocs.Watermark for Java** versão 24.11 ou posterior. +- Um Java Development Kit (JDK) 8 ou mais recente instalado e configurado. +- Familiaridade básica com Maven ou gerenciamento manual de JARs. +- Uma chave de licença temporária ou permanente do portal GroupDocs. + +## Como definir uma licença por consumo para GroupDocs Watermark em Java? + +Carregue suas chaves públicas e privadas, crie uma instância `Metered` e aplique a licença — tudo em três passos concisos. Essa abordagem garante que cada solicitação de marca d'água seja contabilizada em sua conta, proporcionando total visibilidade do consumo. + +### Etapa 1: Definir as chaves públicas e privadas +Insira as chaves que você recebeu após registrar uma licença temporária. + +`Metered` é a classe GroupDocs.Watermark que gerencia licenciamento por consumo e rastreamento de uso. +*Coloque suas chaves em um local seguro (variáveis de ambiente, configuração criptografada, etc.) antes de usá‑las no código.* + +### Etapa 2: Criar uma instância da classe Metered +Instancie o objeto `Metered` com suas chaves. Este objeto será passado ao motor de marca d'água durante a inicialização. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Etapa 3: Definir a licença por consumo usando as chaves fornecidas +Chame o método `setLicense` (ou a chamada de API equivalente) com suas chaves públicas e privadas. Uma vez definido, todas as operações subsequentes de marca d'água serão cobradas de acordo com seu uso. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Dica profissional:** Mantenha as chaves fora do controle de versão. Use um gerenciador de segredos ou arquivo de propriedades criptografado para evitar exposição acidental. + +## Configurando GroupDocs.Watermark para Java + +### Informações de Instalação + +Integre o GroupDocs.Watermark ao seu projeto usando Maven ou baixando o JAR diretamente. + +**Configuração Maven:** +Adicione a seguinte configuração no seu arquivo `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Download Direto:** +Download the latest version from [Versões do GroupDocs.Watermark para Java](https://releases.groupdocs.com/watermark/java/). + +### Aquisição de Licença + +Para desbloquear a funcionalidade completa, obtenha um teste gratuito ou licença temporária: + +- Inscreva‑se no [site da GroupDocs](https://purchase.groupdocs.com/temporary-license/) para começar. +- Após adquirir suas chaves, integre‑as ao seu projeto conforme mostrado no guia de implementação. + +### Inicialização e Configuração Básicas + +Depois que o SDK for adicionado ao seu projeto, importe os namespaces necessários e crie a instância do motor de marca d'água conforme demonstrado nos trechos de código acima. + +## Dicas de Solução de Problemas +- **Chaves inválidas:** Verifique se as chaves públicas e privadas correspondem exatamente; um único erro de digitação impedirá a ativação. +- **Erros no caminho do arquivo de licença:** Se preferir uma licença baseada em arquivo, certifique‑se de que o caminho do arquivo seja absoluto ou resolvido corretamente em relação ao diretório de trabalho. +- **Problemas de rede:** O licenciamento por consumo requer chamadas HTTPS de saída; verifique se seu firewall permite tráfego para `api.groupdocs.com`. + +## Aplicações Práticas +1. **Segurança de Documentos:** Adicione marcas d'água visíveis ou invisíveis a PDFs, documentos Word e imagens para proteger dados corporativos sensíveis. +2. **Rastreamento de Uso:** Gere relatórios sobre quantos documentos foram marcados por dia, útil para orçamento e conformidade. +3. **Integração com CMS:** Automatize a inserção de marcas d'água durante fluxos de trabalho de publicação de conteúdo, com licenciamento aplicado automaticamente. + +## Considerações de Desempenho + +**Otimização de Desempenho:** +- Aplique marcas d'água somente quando necessário; ignore o processamento de arquivos já protegidos. +- Para lotes grandes, reutilize a mesma instância `WatermarkEngine` para evitar sobrecarga de inicialização repetida. + +**Melhores Práticas:** +- Monitore o uso de heap da JVM ao processar PDFs com centenas de páginas; considere APIs de streaming se a memória se tornar um gargalo. +- Ative o registro no nível `INFO` para capturar chamadas de licenciamento sem sobrecarregar o console. + +## Conclusão + +Neste guia, abordamos **como definir licença** para GroupDocs.Watermark em Java, desde a instalação via Maven até a configuração da chave por consumo. Seguindo os passos, você obtém rastreamento preciso de uso, faturamento flexível e proteção robusta de documentos — tudo sem comprometer o desempenho. + +**Próximos Passos:** +- Experimente diferentes estilos de marca d'água (texto, imagem, diagonal). +- Explore recursos avançados, como marcas d'água condicionais baseadas em funções de usuário. +- Revise o painel de análise da GroupDocs para monitorar tendências de consumo. + +Pronto para proteger seus documentos? Implemente a solução hoje e tenha tranquilidade sabendo que seus ativos estão protegidos e os custos de licenciamento são transparentes. + +## Perguntas Frequentes + +**Q: Qual é a diferença entre uma licença temporária e uma licença perpétua?** +A: Uma licença temporária tem tempo limitado e é ideal para avaliação, enquanto uma licença perpétua oferece uso ilimitado sem taxas recorrentes. + +**Q: Posso mudar de uma licença por consumo para uma perpétua sem alterações no código?** +A: Sim — substitua a inicialização da chave por consumo por uma chamada a `engine.setLicense("path/to/license/file")`. + +**Q: O que acontece se o serviço de consumo estiver inacessível?** +A: O SDK recua para o modo offline; a marca d'água continua, mas o uso não será relatado até que a conectividade seja restaurada. + +**Q: Existem limites de tamanho de arquivo para marca d'água?** +A: O SDK pode lidar com arquivos de até 1 GB; arquivos maiores devem ser divididos ou processados em modo de streaming. + +**Q: A licença por consumo funciona em todos os sistemas operacionais?** +A: Funciona em qualquer plataforma que suporte Java 8+, incluindo Windows, Linux e macOS. + +--- + +**Última atualização:** 2026-07-30 +**Testado com:** GroupDocs.Watermark 24.11 for Java +**Autor:** GroupDocs + +**Recursos** +- [Documentação](https://docs.groupdocs.com/watermark/java/) +- [Referência da API](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [Repositório no GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Fórum de Suporte Gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Aquisição de Licença Temporária](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Tutoriais Relacionados + +- [Tutoriais de Licenciamento e Configuração do GroupDocs.Watermark para Java](/watermark/java/licensing-configuration/) +- [Como Configurar o Licenciamento do GroupDocs.Watermark em Java: Um Guia Completo](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Guia de Marcação d'Água em Java: Proteja Documentos com a API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/portuguese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/portuguese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..af932f694 --- /dev/null +++ b/content/portuguese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Aprenda a aplicar marca d'água em PDF com Java adicionando uma marca + d'água de texto às anotações de imagem do PDF usando o GroupDocs.Watermark, protegendo + seus documentos de forma eficaz. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Marca d'água em PDF com Java ao adicionar uma marca d'água de texto + às anotações de imagem do PDF com o GroupDocs.Watermark. Proteja seus documentos + de forma rápida e confiável. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Marca d'água em PDF com Java – Adicionar Texto a Anotações de Imagem +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Marca d'água em PDF com Java – Adicionar Texto a Anotações de Imagem +type: docs +url: /pt/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Marca d'água em PDF com Java – Adicionar Texto a Anotações de Imagem + +Proteger arquivos PDF contra distribuição não autorizada é uma preocupação diária para desenvolvedores. **Watermark PDF Java** permite incorporar texto visível diretamente nas anotações de imagem, garantindo que cada página contenha sua marca ou aviso de confidencialidade. Neste tutorial você verá por que essa abordagem é confiável, o que você precisa para começar e uma implementação passo a passo usando GroupDocs.Watermark para Java. + +## Respostas Rápidas +- **O que a biblioteca faz?** Ele adiciona, edita ou remove marcas d'água em PDFs, Word, Excel e arquivos de imagem. +- **Qual método principal cria a marca d'água?** `Watermark.add()` aplicado a um objeto `Annotation`. +- **Preciso de uma licença para desenvolvimento?** Um teste gratuito funciona para testes; uma licença permanente é necessária para produção. +- **Posso processar PDFs grandes?** Sim – a API transmite páginas, manipulando arquivos > 500 MB sem carregar todo o documento na memória. +- **A solução é thread‑safe?** Todos os métodos públicos são sem estado, portanto você pode executar várias instâncias em paralelo com segurança. + +## O que é watermark pdf java? +`watermark pdf java` refere-se à capacidade de adicionar marcas d'água visuais a documentos PDF a partir de código Java, tipicamente usando uma biblioteca como GroupDocs.Watermark. Ajuda a impor propriedade, confidencialidade ou branding diretamente dentro do arquivo, preservando o layout original e permitindo controle granular sobre aparência e posicionamento. + +## Por que usar GroupDocs.Watermark para Java? +GroupDocs.Watermark suporta **mais de 50 formatos de entrada e saída**, processa PDFs de várias centenas de páginas em menos de 2 segundos em hardware padrão, e não requer um visualizador de PDF completo instalado. Seu mecanismo consciente de anotações preserva o layout original ao inserir marcas d'água de texto com opacidade ajustável, rotação e estilo de fonte, tornando‑o uma escolha rápida e confiável para marca d'água de nível empresarial. + +## Pré-requisitos +- **Java Development Kit (JDK)** 8 ou superior. +- **Maven** (ou inclusão manual de JAR) para gerenciamento de dependências. +- Familiaridade básica com a estrutura de PDF e conceitos de programação Java. + +## Quais são os pré-requisitos para aplicar marca d'água em PDFs com Java? +Você precisa de um JDK compatível, Maven (ou os arquivos JAR) e uma licença válida do GroupDocs.Watermark. A biblioteca funciona em qualquer SO que suporte Java 8+ e funciona com Java 11, 17 e versões LTS mais recentes. Além disso, garanta que seu projeto tenha memória heap suficiente (pelo menos 2 GB) para processar PDFs grandes e que você tenha permissões de gravação no diretório de saída. + +## Configurando GroupDocs.Watermark para Java +Antes de escrever qualquer código, adicione a biblioteca ao seu projeto. + +### Configuração Maven +Adicione o seguinte ao seu arquivo `pom.xml`: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Download Direto +Alternativamente, faça download da versão mais recente em [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Aquisição de Licença +- **Free Trial** – explore os recursos principais sem custo. +- **Temporary License** – desbloqueie todas as funcionalidades durante o desenvolvimento. +- **Purchase** – obtenha uma licença permanente para uso em produção e suporte premium. + +### Inicialização Básica +`Watermark` é a classe de ponto de entrada que carrega um documento, aplica objetos de marca d'água e salva o resultado. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Como adicionar uma marca d'água de texto a anotações de imagem PDF usando GroupDocs.Watermark para Java? +`Watermark.load()` carrega um documento PDF na API Watermark para processamento. `TextWatermark` representa uma marca d'água textual com fonte, tamanho, cor, opacidade e rotação personalizáveis. `ImageAnnotation` é uma anotação PDF que contém uma imagem incorporada, que pode ser alvo de marca d'água. `annotation.addWatermark()` anexa a marca d'água criada à anotação, e `watermark.save()` grava o documento modificado no caminho especificado. + +Carregue seu PDF com `Watermark.load("sample.pdf")`, crie uma instância `TextWatermark`, itere sobre cada `ImageAnnotation` e chame `annotation.addWatermark(textWatermark)`. Finalmente, salve o documento modificado com `watermark.save("output.pdf")`. Esse fluxo conciso lida com qualquer número de anotações em uma única passagem e preserva os metadados originais das anotações. + +### Adicionando uma Marca d'água de Texto a Anotações de Imagem PDF +As seções a seguir detalham cada passo. + +#### Etapa 1: Carregar o Documento PDF +Abra o arquivo PDF alvo para que a API possa inspecionar seus objetos de anotação. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Etapa 2: Criar a Marca d'água de Texto +`TextWatermark` representa uma marca d'água textual com fonte, tamanho, cor, opacidade e rotação personalizáveis. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Etapa 3: Aplicar a Marca d'água às Anotações +`ImageAnnotation` é uma anotação PDF que contém uma imagem incorporada, que pode ser alvo de marca d'água. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Etapa 4: Salvar o PDF com Marca d'água +`watermark.save()` grava o documento modificado no caminho especificado. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Problemas Comuns e Soluções +- **Missing Dependencies** – Verifique se todos os artefatos GroupDocs estão listados no `pom.xml`. +- **File Path Issues** – Use caminhos absolutos ou `Paths.get()` para evitar surpresas com caminhos relativos. +- **Unsupported Annotation Types** – A API atualmente lida com `ImageAnnotation`, `TextAnnotation` e `StampAnnotation`; outros tipos requerem tratamento customizado. + +## Aplicações Práticas +Adicionar uma marca d'água de texto a anotações de imagem PDF é especialmente útil para: +1. **Legal Documents** – Marcar contratos com “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Impedir vazamentos acidentais incorporando um rótulo corporativo. +3. **Marketing Materials** – Marcar PDFs promocionais com uma sobreposição sutil de logo‑texto. +4. **Academic Drafts** – Indicar “Draft – Do Not Distribute” em artigos de pesquisa antes da revisão por pares. + +## Considerações de Desempenho +- **Batch Processing** – Agrupe vários PDFs em um único pool de threads para minimizar a sobrecarga da JVM. +- **Memory Management** – A biblioteca transmite páginas, portanto aloque pelo menos 2 GB de heap para arquivos maiores que 200 MB. +- **Watermark Settings** – Reduzir a opacidade (por exemplo, 30 %) diminui a desordem visual enquanto ainda é detectável. + +## Perguntas Frequentes + +**Q: Posso adicionar marcas d'água a outros tipos de anotação?** +A: Sim, você pode direcionar `TextAnnotation`, `StampAnnotation` ou objetos de anotação personalizados usando o mesmo método `addWatermark`. + +**Q: Existe um limite para quantas marcas d'água posso colocar em uma página?** +A: Não há limite rígido, mas mantenha a opacidade total abaixo de 70 % para manter a legibilidade e evitar degradação de desempenho. + +**Q: Como remover uma marca d'água depois de aplicada?** +A: Use `annotation.removeWatermark(watermarkId)` ou chame `Watermark.removeAll()` para remover todas as marcas d'água do documento. + +**Q: A biblioteca lida com PDFs protegidos por senha?** +A: Sim – forneça a senha ao carregar o documento: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Qual é o tamanho máximo de arquivo suportado?** +A: A API pode processar arquivos de até 2 GB em uma JVM de 64 bits; arquivos maiores devem ser divididos em seções antes da aplicação da marca d'água. + +## Recursos +- [Documentação do GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Referência da API](https://reference.groupdocs.com/watermark/java) +- [Download do GroupDocs.Watermark para Java](https://releases.groupdocs.com/watermark/java/) +- [Repositório no GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Fórum de Suporte Gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Aplicação de Licença Temporária](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Última Atualização:** 2026-07-30 +**Testado com:** GroupDocs.Watermark 23.9 for Java +**Autor:** GroupDocs + +## Tutoriais Relacionados + +- [Como Adicionar uma Marca d'água de Texto a PDF Usando GroupDocs.Watermark para Java (Guia 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Como Adicionar Marcas d'água de Texto e Imagem a Páginas PDF Específicas Usando GroupDocs.Watermark para Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Acessar e Iterar Sobre Artefatos PDF Usando GroupDocs.Watermark em Java para Marcação de Documentos](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/russian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/russian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..e953b402b --- /dev/null +++ b/content/russian/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Узнайте, как установить лицензию для GroupDocs.Watermark в Java, эффективно + защищайте свои документы и управляйте использованием. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Как установить лицензию для GroupDocs.Watermark в Java. Это руководство + проведет вас через установку SDK, получение метерного ключа и настройку лицензии + для защиты ваших документов. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Как установить лицензию для GroupDocs Watermark в Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Как установить лицензию для GroupDocs Watermark в Java +type: docs +url: /ru/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Как установить лицензию для GroupDocs Watermark в Java + +Защита интеллектуальной собственности является главным приоритетом современных приложений, а водяные знаки — проверенный способ предотвратить несанкционированное распространение. Если вы используете **GroupDocs.Watermark for Java**, вам понадобится лицензия, которая может отслеживать использование и масштабироваться в зависимости от спроса. В этом руководстве объясняется **как установить лицензию** для GroupDocs.Watermark в Java, от установки SDK до настройки metered key, который сообщает о потреблении обратно в сервис. + +## Быстрые ответы +- **What is a metered license?** Это лицензия, основанная на использовании, которая фиксирует каждый вызов API, позволяя платить только за то, что вы потребляете. +- **Do I need a trial first?** Да, вы можете запросить временную лицензию на сайте GroupDocs для оценки продукта. +- **Which Java version is required?** Java 8 или новее; SDK скомпилирован для JDK 8+. +- **Can I switch to a perpetual license later?** Конечно — просто замените metered‑ключи постоянным файлом лицензии. +- **Is the setup compatible with Maven?** Да, координаты Maven предоставлены для бесшовного управления зависимостями. + +## Что такое metered license для GroupDocs Watermark? +Metered license — это облачное право, предоставляемое GroupDocs, которое фиксирует каждую операцию наложения водяного знака, выполненную SDK. Каждый вызов API регистрируется на сервере лицензирования GroupDocs, позволяя платить по мере использования на основе фактического потребления. Эта модель дает разработчикам информацию в реальном времени о потреблении и помогает контролировать расходы, обеспечивая при этом полный доступ к функциям. + +## Почему использовать metered license с GroupDocs Watermark? +GroupDocs.Watermark поддерживает более пятидесяти форматов ввода и вывода — включая PDF, DOCX, PPTX и различные типы изображений — и может обрабатывать файлы до 1 ГБ без загрузки всего документа в память, что сохраняет производительность. Используя metered license, вы платите только за те операции, которые действительно выполняете, что позволяет решению масштабироваться экономично, сохраняя полный доступ ко всем функциям. + +## Предварительные требования +- **GroupDocs.Watermark for Java** версии 24.11 или новее. +- Установленный и настроенный Java Development Kit (JDK) 8 или новее. +- Базовое знакомство с Maven или ручным управлением JAR‑файлами. +- Временный или постоянный лицензионный ключ из портала GroupDocs. + +## Как установить metered license для GroupDocs Watermark в Java? + +Загрузите ваши публичный и приватный ключи, создайте экземпляр `Metered` и примените лицензию — всё в три лаконичных шага. Такой подход гарантирует, что каждый запрос на наложение водяного знака будет учтён в вашем аккаунте, предоставляя полную видимость потребления. + +### Шаг 1: Определите публичный и приватный ключи +Введите ключи, полученные после регистрации для временной лицензии. + +`Metered` — это класс GroupDocs.Watermark, который обрабатывает metered‑лицензирование и отслеживание использования. +*Разместите ваши ключи в безопасном месте (переменные окружения, зашифрованный конфиг и т.д.) перед их использованием в коде.* + +### Шаг 2: Создайте экземпляр класса Metered +Создайте объект `Metered` с вашими ключами. Этот объект будет передан движку водяных знаков во время инициализации. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Шаг 3: Установите metered license, используя предоставленные ключи +Вызовите метод `setLicense` (или эквивалентный API‑вызов) с вашими публичным и приватным ключами. После установки все последующие операции наложения водяного знака будут тарифицироваться в соответствии с вашим использованием. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro tip:** Держите ключи вне системы контроля версий. Используйте менеджер секретов или зашифрованный файл свойств, чтобы избежать случайного раскрытия. + +## Настройка GroupDocs.Watermark для Java + +### Информация об установке + +Интегрируйте GroupDocs.Watermark в ваш проект с помощью Maven или загрузив JAR‑файл напрямую. + +**Maven Setup:** +Добавьте следующую конфигурацию в ваш файл `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Direct Download:** +Скачайте последнюю версию с [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Приобретение лицензии + +Чтобы разблокировать полный функционал, получите бесплатную пробную или временную лицензию: + +- Зарегистрируйтесь на [веб‑сайте GroupDocs](https://purchase.groupdocs.com/temporary-license/), чтобы начать. +- После получения ключей интегрируйте их в ваш проект, как показано в руководстве по реализации. + +### Базовая инициализация и настройка + +После добавления SDK в ваш проект импортируйте необходимые пространства имён и создайте экземпляр движка водяных знаков, как показано в приведённых выше фрагментах кода. + +## Советы по устранению неполадок +- **Invalid keys:** Проверьте, что публичный и приватный ключи точно совпадают; одна опечатка помешает активации. +- **License file path errors:** Если вы предпочитаете файловую лицензию, убедитесь, что путь к файлу абсолютный или правильно разрешён относительно рабочей директории. +- **Network issues:** Metered licensing требует исходящих HTTPS‑запросов; проверьте, что ваш брандмауэр разрешает трафик к `api.groupdocs.com`. + +## Практические применения +1. **Document Security:** Добавляйте видимые или невидимые водяные знаки в PDF, документы Word и изображения для защиты конфиденциальных корпоративных данных. +2. **Usage Tracking:** Генерируйте отчёты о количестве документов, получивших водяной знак за день, что полезно для бюджетирования и соответствия требованиям. +3. **CMS Integration:** Автоматизируйте вставку водяных знаков в процессе публикации контента, при этом лицензирование применяется автоматически. + +## Соображения по производительности + +**Optimizing Performance:** +- Применяйте водяные знаки только при необходимости; пропускайте обработку уже защищённых файлов. +- Для больших пакетов переиспользуйте один и тот же экземпляр `WatermarkEngine`, чтобы избежать повторных затрат на инициализацию. + +**Best Practices:** +- Следите за использованием кучи JVM при обработке PDF‑документов с сотнями страниц; при необходимости используйте потоковые API, если память становится узким местом. +- Включите логирование на уровне `INFO`, чтобы фиксировать вызовы лицензирования без перегрузки консоли. + +## Заключение + +В этом руководстве мы рассмотрели **как установить лицензию** для GroupDocs.Watermark в Java, от установки Maven до конфигурации metered‑ключа. Следуя шагам, вы получаете точный учёт использования, гибкую оплату и надёжную защиту документов — без ущерба для производительности. + +**Next Steps:** +- Экспериментируйте с различными стилями водяных знаков (текст, изображение, диагональный). +- Исследуйте расширенные функции, такие как условные водяные знаки в зависимости от ролей пользователей. +- Просмотрите аналитическую панель GroupDocs, чтобы отслеживать тенденции потребления. + +Готовы защитить свои документы? Реализуйте решение уже сегодня и наслаждайтесь спокойствием, зная, что ваши активы защищены, а затраты на лицензирование прозрачны. + +## Часто задаваемые вопросы + +**Q: What is the difference between a temporary and a perpetual license?** +A: Временная лицензия ограничена по времени и идеальна для оценки, тогда как постоянная лицензия предоставляет неограниченное использование без повторяющихся платежей. + +**Q: Can I switch from a metered license to a perpetual one without code changes?** +A: Да — замените инициализацию metered‑ключа вызовом `engine.setLicense("path/to/license/file")`. + +**Q: What happens if the metered service is unreachable?** +A: SDK переходит в офлайн‑режим; наложение водяных знаков продолжается, но использование не будет сообщаться, пока соединение не будет восстановлено. + +**Q: Are there file‑size limits for watermarking?** +A: SDK может обрабатывать файлы до 1 ГБ; более крупные файлы следует разбивать или обрабатывать в потоковом режиме. + +**Q: Does the metered license work on all operating systems?** +A: Она работает на любой платформе, поддерживающей Java 8+, включая Windows, Linux и macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Resources** +- [Документация](https://docs.groupdocs.com/watermark/java/) +- [Справочник API](https://reference.groupdocs.com/watermark/java) +- [Скачать](https://releases.groupdocs.com/watermark/java/) +- [Репозиторий GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Бесплатный форум поддержки](https://forum.groupdocs.com/c/watermark/10) +- [Получение временной лицензии](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Связанные руководства + +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/russian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/russian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..f3d9c5814 --- /dev/null +++ b/content/russian/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,254 @@ +--- +date: '2026-07-30' +description: Узнайте, как наложить водяной знак на PDF в Java, добавив текстовый водяной + знак к аннотациям изображений PDF с помощью GroupDocs.Watermark, эффективно защищая + ваши документы. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Наложите водяной знак на PDF в Java, добавив текстовый водяной знак + к аннотациям изображений PDF с помощью GroupDocs.Watermark. Быстро и надёжно защитите + свои документы. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Наложение водяного знака на PDF в Java – Добавление текста к аннотациям + изображений +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Наложение водяного знака на PDF в Java – Добавление текста к аннотациям изображений +type: docs +url: /ru/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Водяной знак PDF в Java – Добавление текста к аннотациям изображений + +Защита PDF‑файлов от несанкционированного распространения является ежедневной задачей для разработчиков. **Watermark PDF Java** позволяет внедрять видимый текст непосредственно в аннотации изображений, обеспечивая, чтобы каждая страница содержала ваш бренд или уведомление о конфиденциальности. В этом руководстве вы узнаете, почему этот подход надёжен, что необходимо для начала работы, и пошаговую реализацию с использованием GroupDocs.Watermark для Java. + +## Быстрые ответы +- **Что делает библиотека?** Она добавляет, редактирует или удаляет водяные знаки в PDF, Word, Excel и файлов изображений. +- **Какой основной метод создаёт водяной знак?** `Watermark.add()` применяется к объекту `Annotation`. +- **Нужна ли лицензия для разработки?** Бесплатная пробная версия подходит для тестирования; для продакшн‑использования требуется постоянная лицензия. +- **Можно ли обрабатывать большие PDF?** Да — API потоково обрабатывает страницы, работая с файлами > 500 MB без загрузки всего документа в память. +- **Решение потокобезопасно?** Все публичные методы без состояния, поэтому можно безопасно запускать несколько экземпляров параллельно. + +## Что такое watermark pdf java? +`watermark pdf java` относится к возможности добавлять визуальные водяные знаки в PDF‑документы из Java‑кода, обычно с использованием библиотеки, такой как GroupDocs.Watermark. Это помогает обеспечить право собственности, конфиденциальность или брендинг непосредственно внутри файла, сохраняя оригинальное оформление и позволяя тонко настраивать внешний вид и расположение. + +## Почему использовать GroupDocs.Watermark для Java? +GroupDocs.Watermark поддерживает **более 50 форматов ввода и вывода**, обрабатывает многосотстраничные PDF менее чем за 2 секунды на стандартном оборудовании и не требует установки полного PDF‑просмотрщика. Его движок, учитывающий аннотации, сохраняет оригинальное оформление, одновременно вставляя текстовые водяные знаки с регулируемой непрозрачностью, вращением и стилем шрифта, что делает его быстрым и надёжным выбором для корпоративного водяного знака. + +## Предварительные требования +- **Java Development Kit (JDK)** 8 или выше. +- **Maven** (или ручное включение JAR) для управления зависимостями. +- Базовое знакомство со структурой PDF и концепциями программирования на Java. + +## Какие требования к водяным знакам PDF в Java? +Вам нужен совместимый JDK, Maven (или JAR‑файлы) и действующая лицензия GroupDocs.Watermark. Библиотека работает на любой ОС, поддерживающей Java 8+, и совместима с Java 11, 17 и более новыми LTS‑выпусками. Кроме того, убедитесь, что ваш проект имеет достаточный объём памяти кучи (не менее 2 ГБ) для обработки больших PDF и что у вас есть права записи в каталог вывода. + +## Настройка GroupDocs.Watermark для Java +Прежде чем писать код, добавьте библиотеку в ваш проект. + +### Настройка Maven +Добавьте следующее в ваш файл `pom.xml`: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Прямое скачивание +В качестве альтернативы скачайте последнюю версию по ссылке [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Приобретение лицензии +- **Free Trial** – исследуйте основные функции бесплатно. +- **Temporary License** – разблокируйте полный набор возможностей во время разработки. +- **Purchase** – получите постоянную лицензию для продакшн‑использования и премиум‑поддержки. + +### Базовая инициализация +`Watermark` — это основной класс, который загружает документ, применяет объекты водяных знаков и сохраняет результат. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Как добавить текстовый водяной знак к аннотациям изображений PDF с помощью GroupDocs.Watermark для Java? +`Watermark.load()` загружает PDF‑документ в API Watermark для обработки. `TextWatermark` представляет текстовый водяной знак с настраиваемыми шрифтом, размером, цветом, непрозрачностью и вращением. `ImageAnnotation` — это аннотация PDF, содержащая встроенное изображение, которое можно использовать для наложения водяного знака. `annotation.addWatermark()` прикрепляет созданный водяной знак к аннотации, а `watermark.save()` записывает изменённый документ по указанному пути. + +Загрузите ваш PDF с помощью `Watermark.load("sample.pdf")`, создайте экземпляр `TextWatermark`, пройдитесь по каждому `ImageAnnotation` и вызовите `annotation.addWatermark(textWatermark)`. Затем сохраните изменённый документ с помощью `watermark.save("output.pdf")`. Этот лаконичный процесс обрабатывает любое количество аннотаций за один проход и сохраняет оригинальные метаданные аннотаций. + +### Добавление текстового водяного знака к аннотациям изображений PDF +Следующие разделы разбивают процесс на отдельные шаги. + +#### Шаг 1: Загрузка PDF‑документа +Откройте целевой PDF‑файл, чтобы API мог проанализировать его объекты аннотаций. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Шаг 2: Создание текстового водяного знака +`TextWatermark` представляет текстовый водяной знак с настраиваемыми шрифтом, размером, цветом, непрозрачностью и вращением. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Шаг 3: Применение водяного знака к аннотациям +`ImageAnnotation` — это аннотация PDF, содержащая встроенное изображение, которое можно использовать для наложения водяного знака. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Шаг 4: Сохранение PDF с водяным знаком +`watermark.save()` записывает изменённый документ по указанному пути. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Распространённые проблемы и решения +- **Missing Dependencies** – Убедитесь, что все артефакты GroupDocs перечислены в `pom.xml`. +- **File Path Issues** – Используйте абсолютные пути или `Paths.get()`, чтобы избежать неожиданностей с относительными путями. +- **Unsupported Annotation Types** – В настоящее время API поддерживает `ImageAnnotation`, `TextAnnotation` и `StampAnnotation`; другие типы требуют пользовательской обработки. + +## Практические применения +Добавление текстового водяного знака к аннотациям изображений PDF особенно полезно для: +1. **Legal Documents** – Пометьте контракты надписью «Confidential – For Internal Use Only». +2. **Confidential Reports** – Предотвратите случайные утечки, внедрив общекорпоративную метку. +3. **Marketing Materials** – Брендируйте рекламные PDF с помощью тонкого наложения логотипа‑текста. +4. **Academic Drafts** – Укажите «Draft – Do Not Distribute» в научных работах до рецензирования. + +## Соображения по производительности +- **Batch Processing** – Объедините несколько PDF в один пул потоков, чтобы минимизировать нагрузку на JVM. +- **Memory Management** – Библиотека потоково обрабатывает страницы, поэтому выделите минимум 2 ГБ кучи для файлов более 200 МБ. +- **Watermark Settings** – Снижение непрозрачности (например, 30 %) уменьшает визуальный шум, оставаясь при этом заметным. + +## Часто задаваемые вопросы + +**Q: Можно ли добавить водяные знаки к другим типам аннотаций?** +A: Да, вы можете нацеливаться на `TextAnnotation`, `StampAnnotation` или пользовательские объекты аннотаций, используя тот же метод `addWatermark`. + +**Q: Есть ли ограничение на количество водяных знаков, которые можно разместить на странице?** +A: Жёсткого ограничения нет, но держите суммарную непрозрачность ниже 70 %, чтобы сохранить читаемость и избежать ухудшения производительности. + +**Q: Как удалить водяной знак после его применения?** +A: Используйте `annotation.removeWatermark(watermarkId)` или вызовите `Watermark.removeAll()`, чтобы удалить все водяные знаки из документа. + +**Q: Обрабатывает ли библиотека PDF, защищённые паролем?** +A: Да — укажите пароль при загрузке документа: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Какой максимальный поддерживаемый размер файла?** +A: API может обрабатывать файлы до 2 ГБ на 64‑битной JVM; более крупные файлы следует разбить на части перед наложением водяного знака. + +## Ресурсы +- [Документация GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Справочник API](https://reference.groupdocs.com/watermark/java) +- [Скачать GroupDocs.Watermark для Java](https://releases.groupdocs.com/watermark/java/) +- [Репозиторий GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Бесплатный форум поддержки](https://forum.groupdocs.com/c/watermark/10) +- [Заявка на временную лицензию](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Последнее обновление:** 2026-07-30 +**Тестировано с:** GroupDocs.Watermark 23.9 for Java +**Автор:** GroupDocs + +## Связанные руководства + +- [Как добавить текстовый водяной знак в PDF с помощью GroupDocs.Watermark для Java (руководство 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Как добавить текстовые и изображённые водяные знаки на определённые страницы PDF с помощью GroupDocs.Watermark для Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Доступ и перебор артефактов PDF с использованием GroupDocs.Watermark в Java для водяного знака документов](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/spanish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/spanish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..126a1aec9 --- /dev/null +++ b/content/spanish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,264 @@ +--- +date: '2026-07-30' +description: Aprenda cómo establecer la license para GroupDocs.Watermark en Java, + proteja sus documentos de manera eficaz y gestione el uso de forma eficiente. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Cómo establecer la license para GroupDocs.Watermark en Java. Esta + guía le muestra cómo instalar el SDK, obtener una metered key y configurar la license + para proteger sus documentos. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Cómo establecer la license para GroupDocs Watermark en Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Cómo establecer la license para GroupDocs Watermark en Java +type: docs +url: /es/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Cómo establecer la licencia para GroupDocs Watermark en Java + +Proteger la propiedad intelectual es una prioridad máxima para las aplicaciones modernas, y las marcas de agua son una forma probada de disuadir la distribución no autorizada. Si estás usando **GroupDocs.Watermark for Java**, necesitarás una licencia que pueda rastrear el uso y escalar con la demanda. Este tutorial explica **cómo establecer la licencia** para GroupDocs.Watermark en Java, desde la instalación del SDK hasta la configuración de una clave medida que informa el consumo al servicio. + +## Respuestas rápidas +- **¿Qué es una licencia medida?** Es una licencia basada en el uso que registra cada llamada a la API, permitiéndote pagar solo por lo que consumes. +- **¿Necesito una prueba primero?** Sí, puedes solicitar una licencia temporal desde el sitio de GroupDocs para evaluar el producto. +- **¿Qué versión de Java se requiere?** Java 8 o superior; el SDK está compilado para JDK 8+. +- **¿Puedo cambiar a una licencia perpetua más tarde?** Absolutamente, solo reemplaza las claves medidas con un archivo de licencia permanente. +- **¿Es la configuración compatible con Maven?** Sí, se proporcionan las coordenadas Maven para una gestión de dependencias sin problemas. + +## ¿Qué es una licencia medida para GroupDocs Watermark? +Una licencia medida es un derecho habilitado en la nube proporcionado por GroupDocs que registra cada operación de marcado de agua realizada por el SDK. Cada llamada a la API se registra en el servidor de licencias de GroupDocs, lo que permite facturación de pago por uso basada en el consumo real. Este modelo brinda a los desarrolladores información en tiempo real sobre el consumo y ayuda a controlar los costos mientras garantiza el acceso completo a todas las funciones. + +## ¿Por qué usar una licencia medida con GroupDocs Watermark? +GroupDocs.Watermark admite más de cincuenta formatos de entrada y salida —incluidos PDF, DOCX, PPTX y varios tipos de imágenes— y puede procesar archivos de hasta 1 GB sin cargar todo el documento en memoria, lo que preserva el rendimiento. Al usar una licencia medida solo pagas por las operaciones que realmente ejecutas, lo que permite que la solución escale de manera rentable mientras retienes el acceso total a todas las funciones. + +## Requisitos previos +- **GroupDocs.Watermark for Java** versión 24.11 o posterior. +- Un Java Development Kit (JDK) 8 o más reciente instalado y configurado. +- Familiaridad básica con Maven o la gestión manual de JAR. +- Una clave de licencia temporal o permanente del portal de GroupDocs. + +## ¿Cómo establecer una licencia medida para GroupDocs Watermark en Java? + +Carga tus claves públicas y privadas, crea una instancia `Metered` y aplica la licencia —todo en tres pasos concisos. Este enfoque garantiza que cada solicitud de marcado de agua se cuente contra tu cuenta, dándote total visibilidad del consumo. + +### Paso 1: Definir las claves públicas y privadas +Introduce las claves que recibiste después de registrarte para una licencia temporal. + +`Metered` es la clase de GroupDocs.Watermark que maneja la licencia medida y el seguimiento de uso. +*Coloca tus claves en un lugar seguro (variables de entorno, configuración encriptada, etc.) antes de usarlas en el código.* + +### Paso 2: Crear una instancia de la clase Metered +Instancia el objeto `Metered` con tus claves. Este objeto se pasará al motor de marcas de agua durante la inicialización. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Paso 3: Establecer la licencia medida usando las claves proporcionadas +Llama al método `setLicense` (o a la llamada API equivalente) con tus claves públicas y privadas. Una vez configurado, todas las operaciones de marca de agua posteriores se facturarán según tu uso. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Consejo profesional:** Mantén las claves fuera del control de versiones. Usa un gestor de secretos o un archivo de propiedades encriptado para evitar exposiciones accidentales. + +## Configuración de GroupDocs.Watermark para Java + +### Información de instalación + +Integra GroupDocs.Watermark en tu proyecto usando Maven o descargando el JAR directamente. + +**Configuración Maven:** +Añade la siguiente configuración en tu archivo `pom.xml`: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Descarga directa:** +Descarga la última versión desde [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Adquisición de licencia + +Para desbloquear la funcionalidad completa, obtén una prueba gratuita o una licencia temporal: + +- Regístrate en el [sitio web de GroupDocs](https://purchase.groupdocs.com/temporary-license/) para comenzar. +- Después de obtener tus claves, intégralas en tu proyecto como se muestra en la guía de implementación. + +### Inicialización y configuración básica + +Una vez que el SDK se agrega a tu proyecto, importa los espacios de nombres necesarios y crea la instancia del motor de marcas de agua como se demuestra en los fragmentos de código anteriores. + +## Consejos de solución de problemas +- **Claves inválidas:** Verifica que las claves públicas y privadas coincidan exactamente; un solo error tipográfico impedirá la activación. +- **Errores en la ruta del archivo de licencia:** Si prefieres una licencia basada en archivo, asegúrate de que la ruta sea absoluta o se resuelva correctamente respecto al directorio de trabajo. +- **Problemas de red:** La licencia medida requiere llamadas HTTPS salientes; verifica que tu firewall permita el tráfico a `api.groupdocs.com`. + +## Aplicaciones prácticas +1. **Seguridad de documentos:** Añade marcas de agua visibles o invisibles a PDFs, documentos Word e imágenes para proteger datos corporativos sensibles. +2. **Seguimiento de uso:** Genera informes sobre cuántos documentos se han marcado por día, útil para presupuestos y cumplimiento. +3. **Integración CMS:** Automatiza la inserción de marcas de agua durante los flujos de trabajo de publicación de contenido, con la licencia aplicada automáticamente. + +## Consideraciones de rendimiento + +**Optimización del rendimiento:** +- Aplica marcas de agua solo cuando sea necesario; omite el procesamiento de archivos ya protegidos. +- Para lotes grandes, reutiliza la misma instancia de `WatermarkEngine` para evitar la sobrecarga de inicializaciones repetidas. + +**Mejores prácticas:** +- Monitorea el uso del heap de la JVM al procesar PDFs de cientos de páginas; considera APIs de streaming si la memoria se convierte en un cuello de botella. +- Habilita el registro a nivel `INFO` para capturar llamadas de licencia sin saturar la consola. + +## Conclusión + +En esta guía cubrimos **cómo establecer la licencia** para GroupDocs.Watermark en Java, desde la instalación con Maven hasta la configuración de la clave medida. Al seguir los pasos, obtienes un seguimiento preciso del uso, facturación flexible y una protección robusta de documentos, todo sin comprometer el rendimiento. + +**Próximos pasos:** +- Experimenta con diferentes estilos de marca de agua (texto, imagen, diagonal). +- Explora funciones avanzadas como marcas de agua condicionales basadas en roles de usuario. +- Revisa el panel de análisis de GroupDocs para monitorear tendencias de consumo. + +¿Listo para proteger tus documentos? Implementa la solución hoy y disfruta de la tranquilidad de saber que tus activos están protegidos y que los costos de licencia son transparentes. + +## Preguntas frecuentes + +**Q: ¿Cuál es la diferencia entre una licencia temporal y una perpetua?** +A: Una licencia temporal tiene duración limitada y es ideal para evaluación, mientras que una licencia perpetua brinda uso ilimitado sin tarifas recurrentes. + +**Q: ¿Puedo cambiar de una licencia medida a una perpetua sin modificar el código?** +A: Sí, reemplaza la inicialización de la clave medida con una llamada a `engine.setLicense("path/to/license/file")`. + +**Q: ¿Qué ocurre si el servicio de licencia medida no está disponible?** +A: El SDK pasa al modo offline; el marcado de agua continúa pero el uso no se reportará hasta que se restablezca la conectividad. + +**Q: ¿Existen límites de tamaño de archivo para el marcado de agua?** +A: El SDK puede manejar archivos de hasta 1 GB; los archivos más grandes deben dividirse o procesarse en modo streaming. + +**Q: ¿La licencia medida funciona en todos los sistemas operativos?** +A: Funciona en cualquier plataforma que soporte Java 8+, incluidos Windows, Linux y macOS. + +--- + +**Última actualización:** 2026-07-30 +**Probado con:** GroupDocs.Watermark 24.11 for Java +**Autor:** GroupDocs + +## Recursos + +- [Documentación](https://docs.groupdocs.com/watermark/java/) +- [Referencia de API](https://reference.groupdocs.com/watermark/java) +- [Descarga](https://releases.groupdocs.com/watermark/java/) +- [Repositorio GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Foro de soporte gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Adquisición de licencia temporal](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Tutoriales relacionados + +- [Tutoriales de licenciamiento y configuración de GroupDocs.Watermark para Java](/watermark/java/licensing-configuration/) +- [Cómo configurar la licencia de GroupDocs.Watermark en Java: Guía completa](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Guía de marcas de agua en Java: Protege documentos con la API de GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/spanish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/spanish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..d7fa7a94c --- /dev/null +++ b/content/spanish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,252 @@ +--- +date: '2026-07-30' +description: Aprende a watermark PDF en Java añadiendo un watermark de texto a anotaciones + de imagen PDF con GroupDocs.Watermark, protegiendo tus documentos de forma eficaz. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF en Java añadiendo un watermark de texto a anotaciones + de imagen PDF con GroupDocs.Watermark. Protege tus documentos de forma rápida y + fiable. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Marca de agua PDF en Java – Añadir texto a anotaciones de imagen +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Marca de agua PDF en Java – Añadir texto a anotaciones de imagen +type: docs +url: /es/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Marca de agua PDF en Java – Añadir texto a anotaciones de imagen + +Proteger los archivos PDF de la distribución no autorizada es una preocupación diaria para los desarrolladores. **Watermark PDF Java** le permite incrustar texto visible directamente en anotaciones de imagen, asegurando que cada página lleve su marca o aviso de confidencialidad. En este tutorial verá por qué este enfoque es fiable, qué necesita para comenzar y una implementación paso a paso usando GroupDocs.Watermark para Java. + +## Respuestas rápidas +- **¿Qué hace la biblioteca?** Añade, edita o elimina marcas de agua en archivos PDF, Word, Excel y de imagen. +- **¿Qué método principal crea la marca de agua?** `Watermark.add()` aplicado a un objeto `Annotation`. +- **¿Necesito una licencia para desarrollo?** Una prueba gratuita funciona para pruebas; se requiere una licencia permanente para producción. +- **¿Puedo procesar PDFs grandes?** Sí – la API transmite páginas, manejando archivos > 500 MB sin cargar todo el documento en memoria. +- **¿La solución es segura para subprocesos?** Todos los métodos públicos son sin estado, por lo que puede ejecutar varias instancias en paralelo de forma segura. + +## ¿Qué es watermark pdf java? +`watermark pdf java` se refiere a la capacidad de añadir marcas de agua visuales a documentos PDF desde código Java, típicamente usando una biblioteca como GroupDocs.Watermark. Ayuda a imponer la propiedad, confidencialidad o marca directamente dentro del archivo mientras preserva el diseño original y permite un control granular sobre la apariencia y la ubicación. + +## ¿Por qué usar GroupDocs.Watermark para Java? +GroupDocs.Watermark soporta **más de 50 formatos de entrada y salida**, procesa PDFs de cientos de páginas en menos de 2 segundos en hardware estándar, y no requiere un visor PDF completo instalado. Su motor consciente de anotaciones preserva el diseño original mientras inserta marcas de agua de texto con opacidad ajustable, rotación y estilo de fuente, lo que lo convierte en una opción rápida y fiable para marcas de agua de nivel empresarial. + +## Requisitos previos +- **Java Development Kit (JDK)** 8 o superior. +- **Maven** (o inclusión manual de JAR) para la gestión de dependencias. +- Familiaridad básica con la estructura de PDF y conceptos de programación Java. + +## ¿Cuáles son los requisitos previos para aplicar marcas de agua a PDFs en Java? +Necesita un JDK compatible, Maven (o los archivos JAR) y una licencia válida de GroupDocs.Watermark. La biblioteca se ejecuta en cualquier SO que soporte Java 8+, y funciona con Java 11, 17 y versiones LTS más recientes. Además, asegúrese de que su proyecto tenga suficiente memoria heap (al menos 2 GB) para procesar PDFs grandes y que tenga permisos de escritura en el directorio de salida. + +## Configuración de GroupDocs.Watermark para Java +Antes de escribir cualquier código, agregue la biblioteca a su proyecto. + +### Configuración Maven +Agregue lo siguiente a su archivo `pom.xml`: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Descarga directa +Alternativamente, descargue la última versión desde [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/). + +#### Obtención de licencia +- **Free Trial** – explore las funciones principales sin cargo. +- **Temporary License** – desbloquee todas las capacidades durante el desarrollo. +- **Purchase** – obtenga una licencia permanente para uso en producción y soporte premium. + +### Inicialización básica +`Watermark` es la clase de punto de entrada que carga un documento, aplica objetos de marca de agua y guarda el resultado. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Cómo añadir una marca de agua de texto a anotaciones de imagen PDF usando GroupDocs.Watermark para Java? +`Watermark.load()` carga un documento PDF en la API Watermark para su procesamiento. `TextWatermark` representa una marca de agua textual con fuente, tamaño, color, opacidad y rotación personalizables. `ImageAnnotation` es una anotación PDF que contiene una imagen incrustada, que puede ser objetivo para la aplicación de marcas de agua. `annotation.addWatermark()` adjunta la marca de agua creada a la anotación, y `watermark.save()` escribe el documento modificado en la ruta especificada. + +Cargue su PDF con `Watermark.load("sample.pdf")`, cree una instancia `TextWatermark`, recorra cada `ImageAnnotation` y llame a `annotation.addWatermark(textWatermark)`. Finalmente, guarde el documento modificado con `watermark.save("output.pdf")`. Este flujo conciso maneja cualquier número de anotaciones en una sola pasada y preserva los metadatos originales de la anotación. + +### Añadir una marca de agua de texto a anotaciones de imagen PDF +Las siguientes secciones desglosan cada paso. + +#### Paso 1: Cargar el documento PDF +Abra el archivo PDF objetivo para que la API pueda inspeccionar sus objetos de anotación. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Paso 2: Crear la marca de agua de texto +`TextWatermark` representa una marca de agua textual con fuente, tamaño, color, opacidad y rotación personalizables. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Paso 3: Aplicar la marca de agua a las anotaciones +`ImageAnnotation` es una anotación PDF que contiene una imagen incrustada, que puede ser objetivo para la aplicación de marcas de agua. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Paso 4: Guardar el PDF con marca de agua +`watermark.save()` escribe el documento modificado en la ruta especificada. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Problemas comunes y soluciones +- **Missing Dependencies** – Verifique que todos los artefactos de GroupDocs estén listados en `pom.xml`. +- **File Path Issues** – Use rutas absolutas o `Paths.get()` para evitar sorpresas con rutas relativas. +- **Unsupported Annotation Types** – La API actualmente maneja `ImageAnnotation`, `TextAnnotation` y `StampAnnotation`; otros tipos requieren manejo personalizado. + +## Aplicaciones prácticas +Añadir una marca de agua de texto a anotaciones de imagen PDF es especialmente útil para: +1. **Legal Documents** – Marcar contratos con “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Evitar fugas accidentales incrustando una etiqueta a nivel de empresa. +3. **Marketing Materials** – Marcar PDFs promocionales con una superposición sutil de logo‑texto. +4. **Academic Drafts** – Indicar “Draft – Do Not Distribute” en documentos de investigación antes de la revisión por pares. + +## Consideraciones de rendimiento +- **Batch Processing** – Agrupe varios PDFs en un único pool de hilos para minimizar la sobrecarga de la JVM. +- **Memory Management** – La biblioteca transmite páginas, por lo que debe asignar al menos 2 GB de heap para archivos mayores de 200 MB. +- **Watermark Settings** – Reducir la opacidad (p. ej., 30 %) disminuye el desorden visual mientras sigue siendo detectable. + +## Preguntas frecuentes + +**Q: ¿Puedo añadir marcas de agua a otros tipos de anotaciones?** +A: Sí, puede dirigirse a `TextAnnotation`, `StampAnnotation` o objetos de anotación personalizados usando el mismo método `addWatermark`. + +**Q: ¿Existe un límite en la cantidad de marcas de agua que puedo colocar en una página?** +A: No hay un límite estricto, pero mantenga la opacidad total por debajo del 70 % para mantener la legibilidad y evitar la degradación del rendimiento. + +**Q: ¿Cómo elimino una marca de agua después de haberla aplicado?** +A: Use `annotation.removeWatermark(watermarkId)` o llame a `Watermark.removeAll()` para eliminar todas las marcas de agua del documento. + +**Q: ¿La biblioteca maneja PDFs protegidos con contraseña?** +A: Sí – proporcione la contraseña al cargar el documento: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: ¿Cuál es el tamaño máximo de archivo soportado?** +A: La API puede procesar archivos de hasta 2 GB en una JVM de 64 bits; los archivos más grandes deben dividirse en secciones antes de aplicar la marca de agua. + +## Recursos +- [Documentación de GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Referencia de API](https://reference.groupdocs.com/watermark/java) +- [Descargar GroupDocs.Watermark para Java](https://releases.groupdocs.com/watermark/java/) +- [Repositorio de GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Foro de soporte gratuito](https://forum.groupdocs.com/c/watermark/10) +- [Aplicación de licencia temporal](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Última actualización:** 2026-07-30 +**Probado con:** GroupDocs.Watermark 23.9 for Java +**Autor:** GroupDocs + +## Tutoriales relacionados + +- [Cómo añadir una marca de agua de texto a PDF usando GroupDocs.Watermark para Java (Guía 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Cómo añadir marcas de agua de texto e imagen a páginas PDF específicas usando GroupDocs.Watermark para Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Acceder e iterar sobre artefactos PDF usando GroupDocs.Watermark en Java para marcas de agua de documentos](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/swedish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/swedish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..95b497597 --- /dev/null +++ b/content/swedish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Lär dig hur du ställer in licens för GroupDocs.Watermark i Java, skydda + dina dokument effektivt och hantera användning på ett smidigt sätt. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Hur du ställer in licens för GroupDocs.Watermark i Java. Denna guide + visar dig hur du installerar SDK:n, skaffar en metered key och konfigurerar licensen + för att säkra dina dokument. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Hur du ställer in licens för GroupDocs Watermark i Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Hur du ställer in licens för GroupDocs Watermark i Java +type: docs +url: /sv/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Så ställer du in licens för GroupDocs Watermark i Java + +Att skydda immateriella rättigheter är en högsta prioritet för moderna applikationer, och vattenmärken är ett beprövat sätt att avskräcka obehörig distribution. Om du använder **GroupDocs.Watermark för Java**, behöver du en licens som kan spåra användning och skala med efterfrågan. Denna handledning förklarar **hur du ställer in licens** för GroupDocs.Watermark i Java, från installation av SDK till konfiguration av en mätlicensnyckel som rapporterar förbrukning tillbaka till tjänsten. + +## Snabba svar +- **Vad är en mätlicens?** Det är en användningsbaserad licens som registrerar varje API‑anrop, vilket gör att du bara betalar för det du förbrukar. +- **Behöver jag en provperiod först?** Ja, du kan begära en tillfällig licens från GroupDocs‑sajten för att utvärdera produkten. +- **Vilken Java‑version krävs?** Java 8 eller nyare; SDK:n är kompilerad för JDK 8+. +- **Kan jag byta till en evig licens senare?** Absolut – ersätt bara de mätade nycklarna med en permanent licensfil. +- **Är installationen kompatibel med Maven?** Ja, Maven‑koordinaterna tillhandahålls för sömlös beroendehantering. + +## Vad är en mätlicens för GroupDocs Watermark? +En mätlicens är en molnbaserad rättighet som tillhandahålls av GroupDocs och som registrerar varje vattenmärkningsoperation som utförs av SDK:n. Varje API‑anrop loggas på GroupDocs licensserver, vilket möjliggör betalning per användning baserat på faktisk förbrukning. Denna modell ger utvecklare insikt i realtid om förbrukning och hjälper till att kontrollera kostnader samtidigt som full åtkomst till funktioner säkerställs. + +## Varför använda en mätlicens med GroupDocs Watermark? +GroupDocs.Watermark stöder mer än femtio in- och utdataformat — inklusive PDF, DOCX, PPTX och olika bildtyper — och kan bearbeta filer upp till 1 GB utan att ladda hela dokumentet i minnet, vilket bevarar prestanda. Genom att använda en mätlicens betalar du bara för de operationer du faktiskt kör, vilket gör att lösningen kan skala kostnadseffektivt samtidigt som full åtkomst till alla funktioner behålls. + +## Förutsättningar +- **GroupDocs.Watermark för Java** version 24.11 eller senare. +- Ett Java Development Kit (JDK) 8 eller nyare installerat och konfigurerat. +- Grundläggande kunskap om Maven eller manuell JAR‑hantering. +- En tillfällig eller permanent licensnyckel från GroupDocs‑portalen. + +## Hur man ställer in en mätlicens för GroupDocs Watermark i Java? + +Läs in dina offentliga och privata nycklar, skapa en `Metered`‑instans och tillämpa licensen — allt i tre koncisa steg. Detta tillvägagångssätt garanterar att varje vattenmärkningsbegäran räknas mot ditt konto, vilket ger dig full insyn i förbrukningen. + +### Steg 1: Definiera de offentliga och privata nycklarna +Ange de nycklar du fick efter att ha registrerat dig för en tillfällig licens. + +`Metered` är GroupDocs.Watermark‑klassen som hanterar mätlicensiering och användningsspårning. +*Placera dina nycklar på en säker plats (miljövariabler, krypterad konfiguration osv.) innan du använder dem i koden.* + +### Steg 2: Skapa en instans av Metered‑klassen +Instansiera `Metered`‑objektet med dina nycklar. Detta objekt kommer att skickas till vattenmärkningsmotorn under initialisering. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Steg 3: Ställ in den mätade licensen med de angivna nycklarna +Anropa `setLicense`‑metoden (eller motsvarande API‑anrop) med dina offentliga och privata nycklar. När den är satt kommer alla efterföljande vattenmärkningsoperationer att faktureras enligt din användning. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Proffstips:** Håll nycklarna utanför källkodskontrollen. Använd en hemlighets‑hanterare eller en krypterad egenskapsfil för att undvika oavsiktlig exponering. + +## Installera GroupDocs.Watermark för Java + +### Installationsinformation + +Integrera GroupDocs.Watermark i ditt projekt med Maven eller genom att ladda ner JAR‑filen direkt. + +**Maven‑konfiguration:** +Lägg till följande konfiguration i din `pom.xml`‑fil: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Direkt nedladdning:** +Ladda ner den senaste versionen från [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Licensanskaffning + +För att låsa upp full funktionalitet, skaffa en gratis provperiod eller tillfällig licens: + +- Registrera dig på [GroupDocs‑webbplatsen](https://purchase.groupdocs.com/temporary-license/) för att komma igång. +- Efter att ha skaffat dina nycklar, integrera dem i ditt projekt enligt implementationsguiden. + +### Grundläggande initiering och konfiguration + +När SDK:n har lagts till i ditt projekt, importera de nödvändiga namnutrymmena och skapa vattenmärkningsmotorns instans som demonstrerat i kodsnuttarna ovan. + +## Felsökningstips +- **Ogiltiga nycklar:** Dubbelkolla att de offentliga och privata nycklarna matchar exakt; ett enda stavfel hindrar aktivering. +- **Fel på licensfilens sökväg:** Om du föredrar en filbaserad licens, säkerställ att filvägen är absolut eller korrekt löst relativt till arbetskatalogen. +- **Nätverksproblem:** Mätlicensiering kräver utgående HTTPS‑anrop; verifiera att din brandvägg tillåter trafik till `api.groupdocs.com`. + +## Praktiska tillämpningar +1. **Dokumentsäkerhet:** Lägg till synliga eller osynliga vattenmärken i PDF‑, Word‑dokument och bilder för att skydda känslig företagsdata. +2. **Användningsspårning:** Generera rapporter om hur många dokument som har vattenmärkts per dag, användbart för budgetering och efterlevnad. +3. **CMS‑integration:** Automatisera insättning av vattenmärken under publiceringsarbetsflöden, med licensiering som automatiskt verkställs. + +## Prestandaöverväganden + +**Optimera prestanda:** +- Applicera vattenmärken endast när det är nödvändigt; hoppa över bearbetning av redan skyddade filer. +- För stora batcher, återanvänd samma `WatermarkEngine`‑instans för att undvika upprepad initieringskostnad. + +**Bästa praxis:** +- Övervaka JVM‑heap‑användning när du bearbetar PDF‑filer med flera hundra sidor; överväg streaming‑API:er om minnet blir en flaskhals. +- Aktivera loggning på `INFO`‑nivå för att fånga licensanrop utan att överbelasta konsolen. + +## Slutsats + +I den här guiden har vi gått igenom **hur du ställer in licens** för GroupDocs.Watermark i Java, från Maven‑installation till konfiguration av mätlicensnyckel. Genom att följa stegen får du exakt användningsspårning, flexibel fakturering och robust dokumentskydd — allt utan att kompromissa med prestanda. + +**Nästa steg:** +- Experimentera med olika vattenmärkesstilar (text, bild, diagonal). +- Utforska avancerade funktioner som villkorliga vattenmärken baserade på användarroller. +- Granska GroupDocs‑analysdashboarden för att övervaka konsumtionstrender. + +Redo att säkra dina dokument? Implementera lösningen idag och njut av sinnesro när du vet att dina tillgångar är skyddade och dina licenskostnader är transparenta. + +## Vanliga frågor + +**Q: Vad är skillnaden mellan en tillfällig och en evig licens?** +A: En tillfällig licens är tidsbegränsad och idealisk för utvärdering, medan en evig licens ger obegränsad användning utan återkommande avgifter. + +**Q: Kan jag byta från en mätlicens till en evig licens utan kodändringar?** +A: Ja — ersätt mätlicensnyckelinitieringen med ett anrop till `engine.setLicense("path/to/license/file")`. + +**Q: Vad händer om den mätade tjänsten är oåtkomlig?** +A: SDK:n går tillbaka till offline‑läge; vattenmärkning fortsätter men användning rapporteras inte förrän anslutningen återupprättas. + +**Q: Finns det filstorleksgränser för vattenmärkning?** +A: SDK:n kan hantera filer upp till 1 GB; större filer bör delas upp eller bearbetas i streaming‑läge. + +**Q: Fungerar den mätade licensen på alla operativsystem?** +A: Den fungerar på alla plattformar som stödjer Java 8+, inklusive Windows, Linux och macOS. + +--- + +**Senast uppdaterad:** 2026-07-30 +**Testat med:** GroupDocs.Watermark 24.11 for Java +**Författare:** GroupDocs + +**Resurser** +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Relaterade handledningar + +- [GroupDocs.Watermark för Java licens- och konfigurationshandledningar](/watermark/java/licensing-configuration/) +- [Hur man konfigurerar GroupDocs.Watermark-licensiering i Java: En komplett guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java-vattenmärkningsguide: Säkerställ dokument med GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/swedish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/swedish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..555603aa7 --- /dev/null +++ b/content/swedish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,251 @@ +--- +date: '2026-07-30' +description: Lär dig hur du watermarkar PDF i Java genom att lägga till en text watermark + till PDF image annotations med GroupDocs.Watermark, och skydda dina dokument effektivt. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Watermark PDF i Java genom att lägga till en text watermark till PDF + image annotations med GroupDocs.Watermark. Säkerställ dina dokument snabbt och pålitligt. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Watermark PDF i Java – Lägg till text till image annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Watermark PDF i Java – Lägg till text till image annotations +type: docs +url: /sv/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Watermark PDF i Java – Lägg till text på bildanteckningar + +Protecting PDF files from unauthorized distribution is a daily concern for developers. **Watermark PDF Java** lets you embed visible text directly onto image annotations, ensuring every page carries your branding or confidentiality notice. In this tutorial you’ll see why this approach is reliable, what you need to get started, and a step‑by‑step implementation using GroupDocs.Watermark for Java. + +## Snabba svar +- **Vad gör biblioteket?** Det lägger till, redigerar eller tar bort vattenstämplar i PDF‑filer, Word, Excel och bildfiler. +- **Vilken primär metod skapar vattenstämpeln?** `Watermark.add()` applied to an `Annotation` object. +- **Behöver jag en licens för utveckling?** En gratis provversion fungerar för testning; en permanent licens krävs för produktion. +- **Kan jag bearbeta stora PDF‑filer?** Ja – API‑et strömmar sidor och hanterar filer > 500 MB utan att ladda hela dokumentet i minnet. +- **Är lösningen trådsäker?** Alla publika metoder är stateless, så du kan säkert köra flera instanser parallellt. + +## Vad är watermark pdf java? +`watermark pdf java` avser möjligheten att lägga till visuella vattenstämplar i PDF‑dokument från Java‑kod, vanligtvis med ett bibliotek som GroupDocs.Watermark. Det hjälper till att upprätthålla äganderätt, konfidentialitet eller varumärkesprofil direkt i filen samtidigt som den ursprungliga layouten bevaras och fin‑granulär kontroll över utseende och placering möjliggörs. + +## Varför använda GroupDocs.Watermark för Java? +GroupDocs.Watermark stöder **50+ in‑ och utdataformat**, bearbetar PDF‑filer med flera hundra sidor på under 2 sekunder på standardhårdvara, och kräver ingen fullständig PDF‑visare installerad. Dess annoterings‑medvetna motor bevarar originallayouten samtidigt som den infogar textvattenstämplar med justerbar opacitet, rotation och teckensnittsstil, vilket gör det till ett snabbt, pålitligt val för företagsklassad vattenmärkning. + +## Förutsättningar +- **Java Development Kit (JDK)** 8 eller högre. +- **Maven** (eller manuell JAR‑inkludering) för beroendehantering. +- Grundläggande kunskap om PDF‑struktur och Java‑programmeringskoncept. + +## Vad är förutsättningarna för att vattenmärka PDF‑filer i Java? +Du behöver en kompatibel JDK, Maven (eller JAR‑filerna) och en giltig GroupDocs.Watermark‑licens. Biblioteket körs på alla OS som stöder Java 8+, och det fungerar med Java 11, 17 och nyare LTS‑utgåvor. Se dessutom till att ditt projekt har tillräckligt med heap‑minne (minst 2 GB) för att bearbeta stora PDF‑filer och att du har skrivrättigheter till utmatningskatalogen. + +## Konfigurera GroupDocs.Watermark för Java +Innan du skriver någon kod, lägg till biblioteket i ditt projekt. + +### Maven‑inställning +Lägg till följande i din `pom.xml`‑fil: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Direktnedladdning +Alternativt, ladda ner den senaste versionen från [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Licensförvärv +- **Free Trial** – utforska kärnfunktioner utan kostnad. +- **Temporary License** – lås upp full funktionalitet under utveckling. +- **Purchase** – skaffa en permanent licens för produktionsanvändning och premiumsupport. + +### Grundläggande initiering +`Watermark` är huvudklassen som laddar ett dokument, applicerar vattenstämpel‑objekt och sparar resultatet. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Hur man lägger till en textvattenstämpel på PDF‑bildanteckningar med GroupDocs.Watermark för Java? +`Watermark.load()` laddar ett PDF‑dokument i Watermark‑API‑et för bearbetning. `TextWatermark` representerar en textuell vattenstämpel med anpassningsbart teckensnitt, storlek, färg, opacitet och rotation. `ImageAnnotation` är en PDF‑anteckning som innehåller en inbäddad bild, som kan riktas för vattenmärkning. `annotation.addWatermark()` fäster den skapade vattenstämpeln på anteckningen, och `watermark.save()` skriver det modifierade dokumentet till den angivna sökvägen. + +Ladda din PDF med `Watermark.load("sample.pdf")`, skapa en `TextWatermark`‑instans, iterera över varje `ImageAnnotation` och anropa `annotation.addWatermark(textWatermark)`. Slutligen sparar du det modifierade dokumentet med `watermark.save("output.pdf")`. Detta koncisa flöde hanterar valfritt antal anteckningar i ett enda pass och bevarar originalmetadata för anteckningarna. + +### Lägga till en textvattenstämpel på PDF‑bildanteckningar +Följande sektioner bryter ner varje steg. + +#### Steg 1: Ladda PDF‑dokumentet +Öppna mål‑PDF‑filen så att API‑et kan inspektera dess annoteringsobjekt. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Steg 2: Skapa textvattenstämpeln +`TextWatermark` representerar en textuell vattenstämpel med anpassningsbart teckensnitt, storlek, färg, opacitet och rotation. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Steg 3: Applicera vattenstämpeln på anteckningarna +`ImageAnnotation` är en PDF‑anteckning som innehåller en inbäddad bild, som kan riktas för vattenmärkning. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Steg 4: Spara den vattenmärkta PDF‑filen +`watermark.save()` skriver det modifierade dokumentet till den angivna sökvägen. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Vanliga problem och lösningar +- **Missing Dependencies** – Verifiera att alla GroupDocs‑artefakter är listade i `pom.xml`. +- **File Path Issues** – Använd absoluta sökvägar eller `Paths.get()` för att undvika oväntade relativa sökvägar. +- **Unsupported Annotation Types** – API‑et hanterar för närvarande `ImageAnnotation`, `TextAnnotation` och `StampAnnotation`; andra typer kräver anpassad hantering. + +## Praktiska tillämpningar +Att lägga till en textvattenstämpel på PDF‑bildanteckningar är särskilt användbart för: +1. **Juridiska dokument** – Märk kontrakt med “Confidential – For Internal Use Only”. +2. **Konfidentiella rapporter** – Förhindra oavsiktliga läckor genom att bädda in en företagsomfattande etikett. +3. **Marknadsföringsmaterial** – Varumärkesför märkning av marknadsförings‑PDF‑filer med ett subtilt logotyp‑text‑överlägg. +4. **Akademiska utkast** – Ange “Draft – Do Not Distribute” på forskningspapper innan peer review. + +## Prestandaöverväganden +- **Batch Processing** – Gruppera flera PDF‑filer i en enda trådpool för att minimera JVM‑överhead. +- **Memory Management** – Biblioteket strömmar sidor, så allokera minst 2 GB heap för filer större än 200 MB. +- **Watermark Settings** – Lägre opacitet (t.ex. 30 %) minskar visuellt brus samtidigt som den fortfarande är upptäckbar. + +## Vanliga frågor + +**Q: Kan jag lägga till vattenstämplar på andra annoteringstyper?** +A: Ja, du kan rikta in dig på `TextAnnotation`, `StampAnnotation` eller anpassade annoteringsobjekt genom att använda samma `addWatermark`‑metod. + +**Q: Finns det någon gräns för hur många vattenstämplar jag kan placera på en sida?** +A: Ingen hård gräns, men håll den totala opaciteten under 70 % för att bibehålla läsbarhet och undvika prestandaförsämring. + +**Q: Hur tar jag bort en vattenstämpel efter att den har applicerats?** +A: Använd `annotation.removeWatermark(watermarkId)` eller anropa `Watermark.removeAll()` för att ta bort alla vattenstämplar från dokumentet. + +**Q: Hanterar biblioteket lösenordsskyddade PDF‑filer?** +A: Ja – ange lösenordet när du laddar dokumentet: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Vad är den maximala filstorleken som stöds?** +A: API‑et kan bearbeta filer upp till 2 GB på en 64‑bit JVM; större filer bör delas upp i sektioner innan vattenmärkning. + +## Resurser +- [GroupDocs.Watermark Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download GroupDocs.Watermark for Java](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Application](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 23.9 for Java +**Author:** GroupDocs + +## Relaterade handledningar + +- [Hur man lägger till en textvattenstämpel på PDF med GroupDocs.Watermark för Java (2023‑guide)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Hur man lägger till text‑ och bildvattenstämplar på specifika PDF‑sidor med GroupDocs.Watermark för Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Åtkomst och iteration över PDF‑artefakter med GroupDocs.Watermark i Java för dokumentvattenmärkning](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/thai/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/thai/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..638677ab9 --- /dev/null +++ b/content/thai/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,259 @@ +--- +date: '2026-07-30' +description: เรียนรู้วิธีตั้งค่าไลเซนส์สำหรับ GroupDocs.Watermark ใน Java, ปกป้องเอกสารของคุณอย่างมีประสิทธิภาพและจัดการการใช้งานอย่างมีประสิทธิผล +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: วิธีตั้งค่าไลเซนส์สำหรับ GroupDocs.Watermark ใน Java. คู่มือนี้จะพาคุณผ่านการติดตั้ง + SDK, การรับ metered key, และการกำหนดค่าไลเซนส์เพื่อรักษาความปลอดภัยให้กับเอกสารของคุณ +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: วิธีตั้งค่าไลเซนส์สำหรับ GroupDocs Watermark ใน Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: วิธีตั้งค่าไลเซนส์สำหรับ GroupDocs Watermark ใน Java +type: docs +url: /th/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# วิธีตั้งค่าไลเซนส์สำหรับ GroupDocs Watermark ใน Java + +การปกป้องทรัพย์สินทางปัญญาเป็นสิ่งสำคัญอันดับแรกสำหรับแอปพลิเคชันสมัยใหม่ และลายน้ำเป็นวิธีที่พิสูจน์แล้วว่าช่วยป้องกันการกระจายโดยไม่ได้รับอนุญาต หากคุณกำลังใช้ **GroupDocs.Watermark for Java** คุณจะต้องมีไลเซนส์ที่สามารถติดตามการใช้งานและขยายตามความต้องการ บทแนะนำนี้อธิบาย **วิธีตั้งค่าไลเซนส์** สำหรับ GroupDocs.Watermark ใน Java ตั้งแต่การติดตั้ง SDK จนถึงการกำหนดค่า metered key ที่รายงานการใช้กลับไปยังบริการ + +## คำตอบสั้น +- **What is a metered license?** เป็นไลเซนส์แบบใช้ตามการใช้งานที่บันทึกทุกการเรียก API ทำให้คุณจ่ายเฉพาะสิ่งที่ใช้จริงเท่านั้น. +- **Do I need a trial first?** ใช่ คุณสามารถขอไลเซนส์ชั่วคราวจากเว็บไซต์ GroupDocs เพื่อประเมินผลิตภัณฑ์. +- **Which Java version is required?** Java 8 หรือใหม่กว่า; SDK ถูกคอมไพล์สำหรับ JDK 8+. +- **Can I switch to a perpetual license later?** แน่นอน – เพียงแทนที่ metered keys ด้วยไฟล์ไลเซนส์ถาวร. +- **Is the setup compatible with Maven?** ใช่, พิกัด Maven ถูกจัดเตรียมไว้เพื่อการจัดการ dependencies อย่างราบรื่น. + +## ไลเซนส์แบบ Metered สำหรับ GroupDocs Watermark คืออะไร? +ไลเซนส์แบบ metered คือสิทธิ์ที่เปิดใช้งานบนคลาวด์โดย GroupDocs ซึ่งบันทึกการทำงานลายน้ำแต่ละครั้งที่ดำเนินโดย SDK การเรียก API แต่ละครั้งจะถูกบันทึกบนเซิร์ฟเวอร์ไลเซนส์ของ GroupDocs ทำให้สามารถเรียกเก็บค่าใช้จ่ายตามการใช้งานจริง โมเดลนี้ให้ข้อมูลเชิงเวลาจริงเกี่ยวกับการใช้และช่วยควบคุมค่าใช้จ่ายพร้อมยังคงให้เข้าถึงฟีเจอร์ทั้งหมด + +## ทำไมต้องใช้ไลเซนส์แบบ Metered กับ GroupDocs Watermark? +GroupDocs.Watermark รองรับรูปแบบไฟล์เข้าและออกมากกว่าห้าสิบรูปแบบ รวมถึง PDF, DOCX, PPTX และรูปภาพหลายประเภท และสามารถประมวลผลไฟล์ขนาดสูงสุด 1 GB โดยไม่ต้องโหลดเอกสารทั้งหมดเข้าสู่หน่วยความจำ ซึ่งช่วยรักษาประสิทธิภาพ การใช้ไลเซนส์แบบ metered ทำให้คุณจ่ายเฉพาะการดำเนินการที่ทำจริง ช่วยให้โซลูชันขยายได้อย่างคุ้มค่าในด้านต้นทุนพร้อมยังคงเข้าถึงฟีเจอร์ทั้งหมด + +## ข้อกำหนดเบื้องต้น +- **GroupDocs.Watermark for Java** เวอร์ชัน 24.11 หรือใหม่กว่า. +- Java Development Kit (JDK) 8 หรือใหม่กว่า ที่ติดตั้งและกำหนดค่าแล้ว. +- ความคุ้นเคยพื้นฐานกับ Maven หรือการจัดการ JAR ด้วยตนเอง. +- คีย์ไลเซนส์ชั่วคราวหรือถาวรจากพอร์ทัลของ GroupDocs. + +## วิธีตั้งค่าไลเซนส์แบบ Metered สำหรับ GroupDocs Watermark ใน Java? +โหลดคีย์สาธารณะและคีย์ส่วนตัวของคุณ, สร้างอินสแตนซ์ `Metered` และใช้ไลเซนส์—ทั้งหมดในสามขั้นตอนสั้นๆ วิธีนี้รับประกันว่าทุกคำขอการใส่ลายน้ำจะถูกนับในบัญชีของคุณ ให้คุณมองเห็นการใช้ได้อย่างเต็มที่ + +### ขั้นตอนที่ 1: กำหนดคีย์สาธารณะและคีย์ส่วนตัว +ใส่คีย์ที่คุณได้รับหลังจากลงทะเบียนขอไลเซนส์ชั่วคราว + +`Metered` เป็นคลาสของ GroupDocs.Watermark ที่จัดการไลเซนส์แบบ metered และการติดตามการใช้งาน. +*วางคีย์ของคุณในตำแหน่งที่ปลอดภัย (ตัวแปรสภาพแวดล้อม, การตั้งค่าเข้ารหัส, ฯลฯ) ก่อนนำไปใช้ในโค้ด.* + +### ขั้นตอนที่ 2: สร้างอินสแตนซ์ของคลาส Metered +สร้างอ็อบเจ็กต์ `Metered` ด้วยคีย์ของคุณ อ็อบเจ็กต์นี้จะถูกส่งให้กับเอนจินลายน้ำในระหว่างการเริ่มต้น + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### ขั้นตอนที่ 3: ตั้งค่าไลเซนส์แบบ Metered ด้วยคีย์ที่ให้มา +เรียกเมธอด `setLicense` (หรือการเรียก API ที่เทียบเท่า) พร้อมคีย์สาธารณะและคีย์ส่วนตัวของคุณ เมื่อตั้งค่าแล้ว การดำเนินการลายน้ำต่อไปทั้งหมดจะถูกเรียกเก็บตามการใช้งานของคุณ + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **เคล็ดลับ:** อย่าเก็บคีย์ไว้ในระบบควบคุมเวอร์ชัน ใช้ตัวจัดการความลับหรือไฟล์ properties ที่เข้ารหัสเพื่อหลีกเลี่ยงการเปิดเผยโดยบังเอิญ. + +## การตั้งค่า GroupDocs.Watermark สำหรับ Java + +### ข้อมูลการติดตั้ง + +รวม GroupDocs.Watermark เข้าในโปรเจกต์ของคุณโดยใช้ Maven หรือดาวน์โหลด JAR โดยตรง + +**การตั้งค่า Maven:** +เพิ่มการกำหนดค่าดังต่อไปนี้ในไฟล์ `pom.xml` ของคุณ: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**ดาวน์โหลดโดยตรง:** +ดาวน์โหลดเวอร์ชันล่าสุดจาก [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### การรับไลเซนส์ + +เพื่อเปิดใช้งานฟังก์ชันทั้งหมด ให้รับไลเซนส์ทดลองฟรีหรือไลเซนส์ชั่วคราว: + +- ลงทะเบียนบน [เว็บไซต์ GroupDocs](https://purchase.groupdocs.com/temporary-license/) เพื่อเริ่มต้น. +- หลังจากได้คีย์แล้ว ให้นำเข้าคีย์เหล่านั้นเข้าสู่โปรเจกต์ของคุณตามที่แสดงในคู่มือการใช้งาน. + +### การเริ่มต้นและการตั้งค่าพื้นฐาน + +เมื่อ SDK ถูกเพิ่มในโปรเจกต์ของคุณแล้ว ให้นำเข้า namespace ที่จำเป็นและสร้างอินสแตนซ์ของเอนจินลายน้ำตามที่แสดงในโค้ดตัวอย่างด้านบน. + +## เคล็ดลับการแก้ไขปัญหา +- **Invalid keys:** ตรวจสอบให้แน่ใจว่าคีย์สาธารณะและคีย์ส่วนตัวตรงกันอย่างสมบูรณ์; ความผิดพลาดเพียงหนึ่งตัวอักษรจะทำให้การเปิดใช้งานล้มเหลว. +- **License file path errors:** หากคุณต้องการใช้ไลเซนส์แบบไฟล์ ให้ตรวจสอบว่าเส้นทางไฟล์เป็นแบบ absolute หรือแก้ไขให้สัมพันธ์กับไดเรกทอรีทำงานอย่างถูกต้อง. +- **Network issues:** ไลเซนส์แบบ metered ต้องการการเรียก HTTPS ไปข้างนอก; ตรวจสอบว่าไฟร์วอลล์ของคุณอนุญาตการเชื่อมต่อไปยัง `api.groupdocs.com`. + +## การประยุกต์ใช้งานจริง +1. **Document Security:** เพิ่มลายน้ำที่มองเห็นหรือไม่มองเห็นลงใน PDF, เอกสาร Word, และรูปภาพเพื่อปกป้องข้อมูลสำคัญขององค์กร. +2. **Usage Tracking:** สร้างรายงานจำนวนเอกสารที่ถูกใส่ลายน้ำต่อวัน มีประโยชน์ต่อการวางงบประมาณและการปฏิบัติตามกฎระเบียบ. +3. **CMS Integration:** ทำให้การแทรกลายน้ำอัตโนมัติในกระบวนการเผยแพร่เนื้อหา พร้อมบังคับใช้ไลเซนส์โดยอัตโนมัติ. + +## การพิจารณาประสิทธิภาพ + +**การเพิ่มประสิทธิภาพ:** +- ใส่ลายน้ำเฉพาะเมื่อจำเป็น; ข้ามการประมวลผลไฟล์ที่มีลายน้ำอยู่แล้ว. +- สำหรับชุดงานขนาดใหญ่ ให้ใช้ `WatermarkEngine` ตัวเดียวซ้ำเพื่อหลีกเลี่ยงค่าใช้จ่ายการเริ่มต้นหลายครั้ง. + +**แนวทางปฏิบัติที่ดีที่สุด:** +- ตรวจสอบการใช้ heap ของ JVM เมื่อประมวลผล PDF หลายร้อยหน้า; พิจารณาใช้ streaming API หากหน่วยความจำเป็นคอขวด. +- เปิดการบันทึกที่ระดับ `INFO` เพื่อจับการเรียกไลเซนส์โดยไม่ทำให้คอนโซลเต็ม. + +## สรุป + +ในคู่มือนี้ เราได้อธิบาย **วิธีตั้งค่าไลเซนส์** สำหรับ GroupDocs.Watermark ใน Java ตั้งแต่การติดตั้ง Maven จนถึงการกำหนดค่า metered key โดยการทำตามขั้นตอนเหล่านี้ คุณจะได้การติดตามการใช้ที่แม่นยำ การเรียกเก็บค่าใช้จ่ายที่ยืดหยุ่น และการปกป้องเอกสารที่แข็งแกร่ง—ทั้งหมดโดยไม่กระทบต่อประสิทธิภาพ. + +**ขั้นตอนต่อไป:** +- ทดลองสไตล์ลายน้ำต่างๆ (ข้อความ, รูปภาพ, แนวทแยง). +- สำรวจฟีเจอร์ขั้นสูง เช่น ลายน้ำตามเงื่อนไขตามบทบาทผู้ใช้. +- ตรวจสอบแดชบอร์ดวิเคราะห์ของ GroupDocs เพื่อมอนิเตอร์แนวโน้มการใช้. + +พร้อมที่จะปกป้องเอกสารของคุณหรือยัง? นำโซลูชันไปใช้วันนี้และเพลิดเพลินกับความสบายใจที่ทราบว่า assets ของคุณได้รับการปกป้องและค่าไลเซนส์ของคุณโปร่งใส. + +## คำถามที่พบบ่อย + +**Q: What is the difference between a temporary and a perpetual license?** +A: ไลเซนส์ชั่วคราวมีระยะเวลาจำกัดและเหมาะสำหรับการประเมินผล ในขณะที่ไลเซนส์ถาวรให้การใช้งานไม่จำกัดโดยไม่มีค่าธรรมเนียมต่อเนื่อง. + +**Q: Can I switch from a metered license to a perpetual one without code changes?** +A: ใช่—แทนที่การเริ่มต้น metered key ด้วยการเรียก `engine.setLicense("path/to/license/file")`. + +**Q: What happens if the metered service is unreachable?** +A: SDK จะสลับไปยังโหมดออฟไลน์; การใส่ลายน้ำยังคงทำต่อได้ แต่การใช้จะไม่ถูกรายงานจนกว่าจะเชื่อมต่อได้อีกครั้ง. + +**Q: Are there file‑size limits for watermarking?** +A: SDK สามารถจัดการไฟล์ได้สูงสุด 1 GB; ไฟล์ที่ใหญ่กว่าควรแบ่งหรือประมวลผลในโหมด streaming. + +**Q: Does the metered license work on all operating systems?** +A: ทำงานบนแพลตฟอร์มใดก็ได้ที่รองรับ Java 8+ รวมถึง Windows, Linux, และ macOS. + +--- + +**อัปเดตล่าสุด:** 2026-07-30 +**ทดสอบด้วย:** GroupDocs.Watermark 24.11 for Java +**ผู้เขียน:** GroupDocs + +**แหล่งข้อมูล** +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## บทแนะนำที่เกี่ยวข้อง +- [GroupDocs.Watermark for Java Licensing and Configuration Tutorials](/watermark/java/licensing-configuration/) +- [How to Set Up GroupDocs.Watermark Licensing in Java: A Complete Guide](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Watermarking Guide: Secure Documents with GroupDocs.Watermark API](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/thai/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/thai/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..00f24bfc1 --- /dev/null +++ b/content/thai/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,251 @@ +--- +date: '2026-07-30' +description: เรียนรู้วิธีการใส่ลายน้ำ PDF ใน Java โดยการเพิ่มลายน้ำข้อความลงใน image + annotations ของ PDF ด้วย GroupDocs.Watermark เพื่อปกป้องเอกสารของคุณอย่างมีประสิทธิภาพ +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: ใส่ลายน้ำ PDF ใน Java โดยการเพิ่มลายน้ำข้อความลงใน image annotations + ของ PDF ด้วย GroupDocs.Watermark. ปกป้องเอกสารของคุณอย่างรวดเร็วและเชื่อถือได้ +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: ใส่ลายน้ำ PDF ใน Java – Add Text to Image Annotations +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: ใส่ลายน้ำ PDF ใน Java – Add Text to Image Annotations +type: docs +url: /th/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# ใส่น้ำลายน้ำ PDF ใน Java – เพิ่มข้อความใน Annotation ของรูปภาพ + +การปกป้องไฟล์ PDF จากการแจกจ่ายโดยไม่ได้รับอนุญาตเป็นความกังวลประจำวันของนักพัฒนา. **Watermark PDF Java** ช่วยให้คุณฝังข้อความที่มองเห็นได้โดยตรงบน image annotations, ทำให้ทุกหน้ามีแบรนด์หรือประกาศความลับของคุณ. ในบทแนะนำนี้คุณจะเห็นว่าทำไมวิธีนี้จึงเชื่อถือได้, สิ่งที่คุณต้องการเริ่มต้น, และการดำเนินการแบบขั้นตอนโดยใช้ GroupDocs.Watermark สำหรับ Java. + +## คำตอบด่วน +- **ไลบรารีทำอะไร?** มันเพิ่ม, แก้ไข หรือเอาน้ำลายน้ำออกจาก PDF, Word, Excel และไฟล์รูปภาพ. +- **เมธอดหลักที่สร้างน้ำลายน้ำคืออะไร?** `Watermark.add()` ใช้กับอ็อบเจ็กต์ `Annotation`. +- **ฉันต้องใช้ไลเซนส์สำหรับการพัฒนาหรือไม่?** การทดลองใช้ฟรีทำงานสำหรับการทดสอบ; จำเป็นต้องมีไลเซนส์ถาวรสำหรับการใช้งานในโปรดักชัน. +- **ฉันสามารถประมวลผล PDF ขนาดใหญ่ได้หรือไม่?** ได้ – API จะสตรีมหน้า, จัดการไฟล์ > 500 MB โดยไม่ต้องโหลดเอกสารทั้งหมดเข้าสู่หน่วยความจำ. +- **โซลูชันนี้ปลอดภัยต่อการทำงานหลายเธรดหรือไม่?** เมธอดสาธารณะทั้งหมดไม่มีสถานะ, ดังนั้นคุณสามารถรันหลายอินสแตนซ์พร้อมกันได้อย่างปลอดภัย. + +## watermark pdf java คืออะไร? +`watermark pdf java` หมายถึงความสามารถในการเพิ่มน้ำลายน้ำแบบมองเห็นได้ลงในเอกสาร PDF จากโค้ด Java, โดยทั่วไปใช้ไลบรารีเช่น GroupDocs.Watermark. มันช่วยบังคับใช้ความเป็นเจ้าของ, ความลับ, หรือการสร้างแบรนด์โดยตรงในไฟล์พร้อมคงรูปแบบเดิมและให้การควบคุมละเอียดต่อการแสดงผลและตำแหน่ง. + +## ทำไมต้องใช้ GroupDocs.Watermark สำหรับ Java? +GroupDocs.Watermark รองรับ **รูปแบบเข้าและออกกว่า 50+** ประเภท, ประมวลผล PDF หลายร้อยหน้าในเวลาไม่ถึง 2 วินาทีบนฮาร์ดแวร์มาตรฐาน, และไม่ต้องการโปรแกรมดู PDF เต็มรูปแบบติดตั้ง. เครื่องยนต์ที่รับรู้ annotation ของมันคงรูปแบบเดิมขณะแทรกน้ำลายน้ำข้อความที่สามารถปรับความทึบ, การหมุน, และสไตล์ฟอนต์, ทำให้เป็นตัวเลือกที่เร็วและเชื่อถือได้สำหรับการใส่น้ำลายน้ำระดับองค์กร. + +## ข้อกำหนดเบื้องต้น +- **Java Development Kit (JDK)** 8 หรือสูงกว่า. +- **Maven** (หรือการรวม JAR ด้วยตนเอง) สำหรับการจัดการ dependencies. +- ความคุ้นเคยพื้นฐานกับโครงสร้าง PDF และแนวคิดการเขียนโปรแกรม Java. + +## ข้อกำหนดเบื้องต้นสำหรับการใส่น้ำลายน้ำ PDF ใน Java คืออะไร? +คุณต้องมี JDK ที่เข้ากันได้, Maven (หรือไฟล์ JAR), และไลเซนส์ GroupDocs.Watermark ที่ถูกต้อง. ไลบรารีทำงานบน OS ใดก็ได้ที่รองรับ Java 8+, และทำงานกับ Java 11, 17, และรุ่น LTS ใหม่ๆ. นอกจากนี้, ตรวจสอบว่าโครงการของคุณมีหน่วยความจำ heap เพียงพอ (อย่างน้อย 2 GB) สำหรับการประมวลผล PDF ขนาดใหญ่และคุณมีสิทธิ์เขียนไปยังไดเรกทอรีผลลัพธ์. + +## การตั้งค่า GroupDocs.Watermark สำหรับ Java +ก่อนเขียนโค้ดใดๆ, ให้เพิ่มไลบรารีลงในโครงการของคุณ. + +### การตั้งค่า Maven +เพิ่มต่อไปนี้ในไฟล์ `pom.xml` ของคุณ: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### ดาวน์โหลดโดยตรง +หรือ, ดาวน์โหลดเวอร์ชันล่าสุดจาก [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### การรับไลเซนส์ +- **Free Trial** – สำรวจคุณลักษณะหลักโดยไม่เสียค่าใช้จ่าย. +- **Temporary License** – ปลดล็อกความสามารถเต็มรูปแบบระหว่างการพัฒนา. +- **Purchase** – รับไลเซนส์ถาวรสำหรับการใช้งานในโปรดักชันและการสนับสนุนระดับพรีเมียม. + +### การเริ่มต้นพื้นฐาน +`Watermark` คือคลาสจุดเริ่มต้นที่โหลดเอกสาร, ใส่วัตถุน้ำลายน้ำ, และบันทึกผลลัพธ์. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## วิธีเพิ่มน้ำลายน้ำข้อความลงใน annotation ของรูปภาพ PDF ด้วย GroupDocs.Watermark สำหรับ Java? +`Watermark.load()` โหลดเอกสาร PDF เข้าไปใน Watermark API เพื่อประมวลผล. `TextWatermark` แทนน้ำลายน้ำข้อความที่สามารถปรับฟอนต์, ขนาด, สี, ความทึบ, และการหมุนได้. `ImageAnnotation` คือ annotation ของ PDF ที่มีรูปภาพฝังอยู่, ซึ่งสามารถเป็นเป้าหมายสำหรับการใส่น้ำลายน้ำ. `annotation.addWatermark()` แนบน้ำลายน้ำที่สร้างไปยัง annotation, และ `watermark.save()` เขียนเอกสารที่แก้ไขแล้วไปยังเส้นทางที่ระบุ. + +โหลด PDF ของคุณด้วย `Watermark.load("sample.pdf")`, สร้างอินสแตนซ์ `TextWatermark`, วนลูปแต่ละ `ImageAnnotation`, และเรียก `annotation.addWatermark(textWatermark)`. สุดท้าย, บันทึกเอกสารที่แก้ไขด้วย `watermark.save("output.pdf")`. กระบวนการสั้นนี้จัดการกับจำนวน annotation ใดๆ ในหนึ่งรอบและคง metadata ของ annotation ดั้งเดิม. + +### การเพิ่มน้ำลายน้ำข้อความลงใน annotation ของรูปภาพ PDF +ส่วนต่อไปนี้จะแยกขั้นตอนแต่ละขั้นตอน. + +#### ขั้นตอนที่ 1: โหลดเอกสาร PDF +เปิดไฟล์ PDF เป้าหมายเพื่อให้ API ตรวจสอบวัตถุ annotation ของมัน. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### ขั้นตอนที่ 2: สร้างน้ำลายน้ำข้อความ +`TextWatermark` แทนน้ำลายน้ำข้อความที่สามารถปรับฟอนต์, ขนาด, สี, ความทึบ, และการหมุนได้. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### ขั้นตอนที่ 3: ใส่น้ำลายน้ำลงใน Annotation +`ImageAnnotation` คือ annotation ของ PDF ที่มีรูปภาพฝังอยู่, ซึ่งสามารถเป็นเป้าหมายสำหรับการใส่น้ำลายน้ำ. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### ขั้นตอนที่ 4: บันทึก PDF ที่มีน้ำลายน้ำ +`watermark.save()` เขียนเอกสารที่แก้ไขแล้วไปยังเส้นทางที่ระบุ. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## ปัญหาทั่วไปและวิธีแก้ +- **Missing Dependencies** – ตรวจสอบว่า artifacts ของ GroupDocs ทั้งหมดได้ระบุใน `pom.xml` แล้ว. +- **File Path Issues** – ใช้เส้นทางแบบ absolute หรือ `Paths.get()` เพื่อหลีกเลี่ยงความประหลาดใจจากเส้นทาง relative. +- **Unsupported Annotation Types** – API ปัจจุบันรองรับ `ImageAnnotation`, `TextAnnotation`, และ `StampAnnotation`; ประเภทอื่นต้องการการจัดการแบบกำหนดเอง. + +## การประยุกต์ใช้งานจริง +การเพิ่มน้ำลายน้ำข้อความลงใน annotation ของรูปภาพ PDF มีประโยชน์เป็นพิเศษสำหรับ: +1. **Legal Documents** – ทำเครื่องหมายสัญญาด้วย “Confidential – For Internal Use Only”. +2. **Confidential Reports** – ป้องกันการรั่วไหลโดยบรรจุตัวอักษรแสดงความลับทั่วบริษัท. +3. **Marketing Materials** – สร้างแบรนด์ให้กับ PDF โปรโมชันด้วยการโอเวอร์เลย์โลโก้‑ข้อความที่ละเอียดอ่อน. +4. **Academic Drafts** – ระบุ “Draft – Do Not Distribute” บนเอกสารวิจัยก่อนการตรวจสอบโดยผู้เชี่ยวชาญ. + +## พิจารณาด้านประสิทธิภาพ +- **Batch Processing** – รวมหลาย PDF เข้าใน thread pool เดียวเพื่อให้ใช้ทรัพยากร JVM น้อยลง. +- **Memory Management** – ไลบรารีสตรีมหน้า, ดังนั้นจัดสรร heap อย่างน้อย 2 GB สำหรับไฟล์ที่ใหญ่กว่า 200 MB. +- **Watermark Settings** – ลดความทึบ (เช่น 30 %) จะลดความรกของภาพในขณะที่ยังคงตรวจจับได้. + +## คำถามที่พบบ่อย + +**Q: ฉันสามารถเพิ่มน้ำลายน้ำไปยังประเภท annotation อื่นได้หรือไม่?** +A: ใช่, คุณสามารถกำหนดเป้าหมาย `TextAnnotation`, `StampAnnotation`, หรืออ็อบเจ็กต์ annotation แบบกำหนดเองโดยใช้เมธอด `addWatermark` เดียวกัน. + +**Q: มีขีดจำกัดจำนวนน้ำลายน้ำที่ฉันสามารถวางบนหน้าได้หรือไม่?** +A: ไม่มีขีดจำกัดที่แน่นอน, แต่ควรรักษาความทึบรวมต่ำกว่า 70 % เพื่อรักษาความอ่านง่ายและหลีกเลี่ยงการลดประสิทธิภาพ. + +**Q: ฉันจะลบน้ำลายน้ำหลังจากที่ได้ใส่แล้วได้อย่างไร?** +A: ใช้ `annotation.removeWatermark(watermarkId)` หรือเรียก `Watermark.removeAll()` เพื่อลบน้ำลายน้ำทั้งหมดจากเอกสาร. + +**Q: ไลบรารีรองรับ PDF ที่มีการป้องกันด้วยรหัสผ่านหรือไม่?** +A: ใช่ – ให้รหัสผ่านเมื่อโหลดเอกสาร: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: ขนาดไฟล์สูงสุดที่รองรับคือเท่าไหร่?** +A: API สามารถประมวลผลไฟล์ได้สูงสุด 2 GB บน JVM 64‑bit; ไฟล์ที่ใหญ่กว่านั้นควรแบ่งเป็นส่วนก่อนใส่น้ำลายน้ำ. + +## แหล่งข้อมูล +- [เอกสาร GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [อ้างอิง API](https://reference.groupdocs.com/watermark/java) +- [ดาวน์โหลด GroupDocs.Watermark สำหรับ Java](https://releases.groupdocs.com/watermark/java/) +- [ที่เก็บ GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [ฟอรั่มสนับสนุนฟรี](https://forum.groupdocs.com/c/watermark/10) +- [แบบฟอร์มขอไลเซนส์ชั่วคราว](https://purchase.groupdocs.com/temporary-license/) + +--- + +**อัปเดตล่าสุด:** 2026-07-30 +**ทดสอบด้วย:** GroupDocs.Watermark 23.9 สำหรับ Java +**ผู้เขียน:** GroupDocs + +## บทแนะนำที่เกี่ยวข้อง + +- [วิธีเพิ่มน้ำลายน้ำข้อความลงใน PDF โดยใช้ GroupDocs.Watermark สำหรับ Java (คู่มือ 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [วิธีเพิ่มน้ำลายน้ำข้อความและรูปภาพลงในหน้า PDF เฉพาะโดยใช้ GroupDocs.Watermark สำหรับ Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [การเข้าถึงและวนลูป PDF Artifacts ด้วย GroupDocs.Watermark ใน Java สำหรับการใส่น้ำลายน้ำเอกสาร](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/turkish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/turkish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..8189aaefa --- /dev/null +++ b/content/turkish/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,261 @@ +--- +date: '2026-07-30' +description: Java'da GroupDocs.Watermark lisansını nasıl ayarlayacağınızı öğrenin, + belgelerinizi etkili bir şekilde koruyun ve kullanımı verimli bir şekilde yönetin. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Java'da GroupDocs.Watermark lisansını nasıl ayarlayacağınız. Bu kılavuz, + SDK'yı kurmanızı, ölçümlü bir anahtar edinmenizi ve belgelerinizi güvence altına + almak için lisansı yapılandırmanızı adım adım gösterir. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Java'da GroupDocs Watermark Lisansını Nasıl Ayarlarsınız +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Java'da GroupDocs Watermark Lisansını Nasıl Ayarlarsınız +type: docs +url: /tr/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# GroupDocs Watermark için Java'da Lisans Nasıl Ayarlanır + +Fikri mülkiyetin korunması modern uygulamalar için en önemli önceliktir ve filigranlar yetkisiz dağıtımı önlemenin kanıtlanmış bir yoludur. **GroupDocs.Watermark for Java** kullanıyorsanız, kullanımı izleyebilen ve talebe göre ölçeklenebilen bir lisansa ihtiyacınız olacak. Bu öğretici, SDK'yı kurmaktan tüketimi hizmete bildiren bir ölçülü anahtar yapılandırmaya kadar GroupDocs.Watermark için Java'da **lisans nasıl ayarlanır** konusunu açıklamaktadır. + +## Hızlı Yanıtlar +- **Metered lisans nedir?** Kullanıma dayalı bir lisansdır ve her API çağrısını kaydeder, böylece yalnızca tükettiğiniz kadar ödeme yaparsınız. +- **Önce deneme sürümüne ihtiyacım var mı?** Evet, ürünü değerlendirmek için GroupDocs sitesinden geçici bir lisans talep edebilirsiniz. +- **Hangi Java sürümü gereklidir?** Java 8 veya daha yeni; SDK JDK 8+ için derlenmiştir. +- **Daha sonra kalıcı bir lisansa geçebilir miyim?** Kesinlikle – sadece ölçülü anahtarları kalıcı bir lisans dosyasıyla değiştirin. +- **Kurulum Maven ile uyumlu mu?** Evet, sorunsuz bağımlılık yönetimi için Maven koordinatları sağlanmıştır. + +## GroupDocs Watermark için ölçülü lisans nedir? +Metered lisans, GroupDocs tarafından sağlanan ve SDK tarafından gerçekleştirilen her filigranlama işlemini kaydeden bulut‑etkin bir yetkidir. Her API çağrısı GroupDocs lisans sunucusunda kaydedilir, bu da gerçek kullanım bazlı ödeme yapmanızı sağlar. Bu model, geliştiricilere tüketim hakkında gerçek zamanlı içgörü sağlar ve tam özellik erişimini garanti ederken maliyetleri kontrol etmeye yardımcı olur. + +## GroupDocs Watermark ile ölçülü lisans neden kullanılmalı? +GroupDocs.Watermark, PDF, DOCX, PPTX ve çeşitli görüntü türleri dahil olmak üzere elliden fazla giriş ve çıkış formatını destekler ve belgeyi belleğe tamamen yüklemeden 1 GB'a kadar dosyaları işleyebilir, bu da performansı korur. Ölçülü lisans kullanarak yalnızca gerçekten gerçekleştirdiğiniz işlemler için ödeme yaparsınız, bu da çözümün maliyet‑etkin bir şekilde ölçeklenmesini ve tüm özelliklere tam erişimin korunmasını sağlar. + +## Önkoşullar +- **GroupDocs.Watermark for Java** sürüm 24.11 veya daha yeni. +- Kurulu ve yapılandırılmış bir Java Development Kit (JDK) 8 veya daha yeni. +- Maven veya manuel JAR yönetimi konusunda temel bilgi. +- GroupDocs portalından alınan geçici veya kalıcı bir lisans anahtarı. + +## GroupDocs Watermark için Java'da ölçülü lisans nasıl ayarlanır? +Genel ve özel anahtarlarınızı yükleyin, bir `Metered` örneği oluşturun ve lisansı uygulayın—tüm bunlar üç kısa adımda. Bu yaklaşım, her filigranlama isteğinin hesabınıza işlenmesini garanti eder ve tüketim hakkında tam görünürlük sağlar. + +### Adım 1: Genel ve özel anahtarları tanımlayın +Geçici lisans için kaydolduktan sonra aldığınız anahtarları girin. + +`Metered` GroupDocs.Watermark sınıfıdır ve ölçülü lisanslama ve kullanım takibini yönetir. +*Kod içinde kullanmadan önce anahtarlarınızı güvenli bir konuma (ortam değişkenleri, şifreli yapılandırma vb.) yerleştirin.* + +### Adım 2: Metered sınıfının bir örneğini oluşturun +`Metered` nesnesini anahtarlarınızla örnekleyin. Bu nesne, başlatma sırasında watermark motoruna aktarılacaktır. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Adım 3: Sağlanan anahtarları kullanarak ölçülü lisansı ayarlayın +`setLicense` metodunu (veya eşdeğer API çağrısını) genel ve özel anahtarlarınızla çağırın. Ayarlandıktan sonra sonraki tüm filigran işlemleri kullanımınıza göre faturalandırılacaktır. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Pro tip:** Anahtarları kaynak kontrolünden uzak tutun. Kazara ifşayı önlemek için bir gizli yönetici veya şifreli özellik dosyası kullanın. + +## GroupDocs.Watermark'ı Java için Kurma + +### Kurulum Bilgileri + +GroupDocs.Watermark'ı projenize Maven kullanarak ya da JAR dosyasını doğrudan indirerek entegre edin. + +**Maven Kurulumu:** +`pom.xml` dosyanıza aşağıdaki yapılandırmayı ekleyin: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Doğrudan İndirme:** +En son sürümü [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) adresinden indirin. + +### Lisans Alımı + +Tam işlevselliği açmak için ücretsiz bir deneme veya geçici lisans edinin: +- Başlamak için [GroupDocs web sitesine](https://purchase.groupdocs.com/temporary-license/) kaydolun. +- Anahtarlarınızı edindikten sonra, uygulama kılavuzunda gösterildiği gibi projenize entegre edin. + +### Temel Başlatma ve Kurulum + +SDK projenize eklendikten sonra, gerekli paketleri içe aktarın ve yukarıdaki kod parçacıklarında gösterildiği gibi watermark motoru örneğini oluşturun. + +## Sorun Giderme İpuçları +- **Geçersiz anahtarlar:** Genel ve özel anahtarların tam olarak eşleştiğini iki kez kontrol edin; tek bir yazım hatası etkinleştirmeyi engeller. +- **Lisans dosyası yolu hataları:** Dosya tabanlı bir lisans tercih ediyorsanız, dosya yolunun mutlak olduğundan veya çalışma dizinine göre doğru çözüldüğünden emin olun. +- **Ağ sorunları:** Ölçülü lisanslama dışa doğru HTTPS çağrıları gerektirir; güvenlik duvarınızın `api.groupdocs.com` adresine trafiğe izin verdiğini doğrulayın. + +## Pratik Uygulamalar +1. **Belge Güvenliği:** Hassas kurumsal verileri korumak için PDF, Word belgeleri ve görüntülere görünür veya görünmez filigranlar ekleyin. +2. **Kullanım Takibi:** Günlük olarak kaç belgenin filigranlandığını gösteren raporlar oluşturun; bu bütçeleme ve uyumluluk için faydalıdır. +3. **CMS Entegrasyonu:** İçerik yayınlama iş akışları sırasında filigran eklemeyi otomatikleştirin, lisans otomatik olarak uygulanır. + +## Performans Düşünceleri + +**Performansı Optimize Etme:** +- Filigranları yalnızca gerektiğinde uygulayın; zaten korunan dosyalar için işleme atlayın. +- Büyük toplularda, aynı `WatermarkEngine` örneğini yeniden kullanarak tekrarlanan başlatma yükünden kaçının. + +**En İyi Uygulamalar:** +- Yüzlerce sayfalık PDF'leri işlerken JVM yığın kullanımını izleyin; bellek darboğazı olursa akış API'lerini düşünün. +- Konsolu boğmadan lisans çağrılarını yakalamak için `INFO` seviyesinde günlüklemeyi etkinleştirin. + +## Sonuç + +Bu rehberde, Maven kurulumu ve ölçülü anahtar yapılandırmasından GroupDocs.Watermark için Java'da **lisans nasıl ayarlanır** konusuna kadar her şeyi ele aldık. Adımları izleyerek kesin kullanım takibi, esnek faturalama ve sağlam belge koruması elde edersiniz—performanstan ödün vermeden. + +**Sonraki Adımlar:** +- Farklı filigran stillerini (metin, görüntü, diyagonal) deneyin. +- Kullanıcı rolleri bazlı koşullu filigranlar gibi gelişmiş özellikleri keşfedin. +- Tüketim trendlerini izlemek için GroupDocs analiz panosunu inceleyin. + +Belgelerinizi korumaya hazır mısınız? Çözümü bugün uygulayın ve varlıklarınızın korunduğunu ve lisans maliyetlerinizin şeffaf olduğunu bilerek iç huzuru yaşayın. + +## Sık Sorulan Sorular + +**Q:** Geçici ve kalıcı lisans arasındaki fark nedir? +**A:** Geçici lisans zaman sınırlıdır ve değerlendirme için idealdir, kalıcı lisans ise yinelenen ücretler olmadan sınırsız kullanım sağlar. + +**Q:** Kod değişikliği yapmadan ölçülü lisansı kalıcı bir lisansa geçirebilir miyim? +**A:** Evet—ölçülü anahtar başlatmasını `engine.setLicense("path/to/license/file")` çağrısıyla değiştirin. + +**Q:** Ölçülü hizmet erişilemez olduğunda ne olur? +**A:** SDK çevrim dışı moda geçer; filigranlama devam eder ancak kullanım, bağlantı yeniden sağlanana kadar raporlanmaz. + +**Q:** Filigranlama için dosya boyutu sınırlamaları var mı? +**A:** SDK 1 GB'a kadar dosyaları işleyebilir; daha büyük dosyalar bölünmeli veya akış modunda işlenmelidir. + +**Q:** Ölçülü lisans tüm işletim sistemlerinde çalışıyor mu? +**A:** Java 8+ destekleyen herhangi bir platformda çalışır; Windows, Linux ve macOS dahil. + +--- + +**Son Güncelleme:** 2026-07-30 +**Test Edilen:** GroupDocs.Watermark 24.11 for Java +**Yazar:** GroupDocs + +**Kaynaklar** +- [Documentation](https://docs.groupdocs.com/watermark/java/) +- [API Reference](https://reference.groupdocs.com/watermark/java) +- [Download](https://releases.groupdocs.com/watermark/java/) +- [GitHub Repository](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Free Support Forum](https://forum.groupdocs.com/c/watermark/10) +- [Temporary License Acquisition](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## İlgili Öğreticiler + +- [GroupDocs.Watermark for Java Lisans ve Konfigürasyon Öğreticileri](/watermark/java/licensing-configuration/) +- [GroupDocs.Watermark Lisansını Java'da Kurma: Tam Kılavuz](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Java Filigran Kılavuzu: Belgeleri GroupDocs.Watermark API ile Güvence Altına Alın](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/turkish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/turkish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..71a91ff56 --- /dev/null +++ b/content/turkish/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: GroupDocs.Watermark kullanarak PDF görüntü açıklamalarına metin filigranı + ekleyerek Java'da PDF'ye filigran eklemeyi öğrenin, belgelerinizi etkili bir şekilde + koruyun. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: GroupDocs.Watermark ile PDF görüntü açıklamalarına metin filigranı + ekleyerek Java'da PDF'ye filigran ekleyin. Belgelerinizi hızlı ve güvenilir bir + şekilde güvence altına alın. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Java'da PDF'ye Filigran – Görüntü Açıklamalarına Metin Ekle +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Java'da PDF'ye Filigran – Görüntü Açıklamalarına Metin Ekle +type: docs +url: /tr/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Java'da PDF Üzerine Filigran – Görüntü Açıklamalarına Metin Ekle + +PDF dosyalarını yetkisiz dağıtımdan korumak geliştiriciler için günlük bir endişedir. **Watermark PDF Java** görsel metni doğrudan görüntü açıklamalarına yerleştirmenizi sağlar, her sayfanın markanızı veya gizlilik bildirimini taşımasını temin eder. Bu öğreticide bu yaklaşımın neden güvenilir olduğunu, başlamanız için neler gerektiğini ve GroupDocs.Watermark for Java kullanarak adım adım bir uygulamayı göreceksiniz. + +## Hızlı Yanıtlar +- **Kütüphane ne yapar?** PDF, Word, Excel ve görüntü dosyalarına filigran ekler, düzenler veya kaldırır. +- **Hangi birincil yöntem filigranı oluşturur?** `Watermark.add()` bir `Annotation` nesnesine uygulanır. +- **Geliştirme için lisansa ihtiyacım var mı?** Ücretsiz deneme test için çalışır; üretim için kalıcı lisans gereklidir. +- **Büyük PDF'leri işleyebilir miyim?** Evet – API sayfaları akış olarak işler, dosyaları > 500 MB bütün belgeyi belleğe yüklemeden yönetir. +- **Çözüm çok iş parçacıklı (thread‑safe) mi?** Tüm genel yöntemler durum bilgisizdir, bu yüzden birden fazla örneği paralel olarak güvenle çalıştırabilirsiniz. + +## Watermark PDF Java nedir? +`watermark pdf java`, Java kodundan PDF belgelerine görsel filigran ekleme yeteneğini ifade eder, genellikle GroupDocs.Watermark gibi bir kütüphane kullanılarak. Dosyanın içinde doğrudan sahiplik, gizlilik veya marka eklemeyi sağlar, özgün düzeni korur ve görünüm ve konum üzerinde ayrıntılı kontrol imkanı verir. + +## Neden Java için GroupDocs.Watermark kullanmalı? +GroupDocs.Watermark **50+ giriş ve çıkış formatını** destekler, standart donanımda çok sayfalı PDF'leri 2 saniyenin altında işler ve tam bir PDF görüntüleyici kurulumuna ihtiyaç duymaz. Açıklama‑bilinçli motoru, ayarlanabilir opaklık, dönüş ve yazı tipi stiline sahip metin filigranları eklerken özgün düzeni korur, bu da onu kurumsal düzeyde filigranlama için hızlı, güvenilir bir seçim yapar. + +## Önkoşullar +- **Java Development Kit (JDK)** 8 ve üzeri. +- **Maven** (veya manuel JAR ekleme) bağımlılık yönetimi için. +- PDF yapısı ve Java programlama kavramlarına temel aşinalık. + +## Java'da PDF'lere filigran eklemek için önkoşullar nelerdir? +Uyumlu bir JDK, Maven (veya JAR dosyaları) ve geçerli bir GroupDocs.Watermark lisansına ihtiyacınız var. Kütüphane, Java 8+ destekleyen herhangi bir işletim sisteminde çalışır ve Java 11, 17 ve daha yeni LTS sürümleriyle uyumludur. Ayrıca, projenizin büyük PDF'leri işlemek için yeterli yığın belleğine (en az 2 GB) sahip olduğundan ve çıktı dizinine yazma izniniz olduğundan emin olun. + +## Java için GroupDocs.Watermark Kurulumu +Kod yazmadan önce, kütüphaneyi projenize ekleyin. + +### Maven Kurulumu +Add the following to your `pom.xml` file: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Doğrudan İndirme +Alternatif olarak, en son sürümü [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/) adresinden indirin. + +#### Lisans Alımı +- **Free Trial** – ücret almadan temel özellikleri keşfedin. +- **Temporary License** – geliştirme sırasında tam yetenekleri açın. +- **Purchase** – üretim kullanımı ve premium destek için kalıcı lisans edinin. + +### Temel Başlatma +`Watermark` is the entry point class that loads a document, applies watermark objects, and saves the result. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## GroupDocs.Watermark for Java kullanarak PDF görüntü açıklamalarına metin filigranı nasıl eklenir? +`Watermark.load()` bir PDF belgesini işleme için Watermark API'sine yükler. `TextWatermark` özelleştirilebilir yazı tipi, boyut, renk, opaklık ve dönüşe sahip bir metin filigranını temsil eder. `ImageAnnotation` gömülü bir görüntü içeren bir PDF açıklamasıdır ve filigran hedefi olarak kullanılabilir. `annotation.addWatermark()` oluşturulan filigranı açıklamaya ekler ve `watermark.save()` değiştirilmiş belgeyi belirtilen yola yazar. + +PDF'nizi `Watermark.load("sample.pdf")` ile yükleyin, bir `TextWatermark` örneği oluşturun, her `ImageAnnotation` üzerinde döngü yapın ve `annotation.addWatermark(textWatermark)` çağrısını yapın. Son olarak, değiştirilmiş belgeyi `watermark.save("output.pdf")` ile kaydedin. Bu özlü akış, tek bir geçişte herhangi bir sayıda açıklamayı işler ve özgün açıklama meta verilerini korur. + +### PDF Görüntü Açıklamalarına Metin Filigranı Ekleme +Aşağıdaki bölümler her adımı ayrıntılandırır. + +#### Adım 1: PDF Belgesini Yükle +Hedef PDF dosyasını açın, böylece API açıklama nesnelerini inceleyebilir. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Adım 2: Metin Filigranı Oluştur +`TextWatermark` özelleştirilebilir yazı tipi, boyut, renk, opaklık ve dönüşe sahip bir metin filigranını temsil eder. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Adım 3: Filigranı Açıklamalara Uygula +`ImageAnnotation` gömülü bir görüntü içeren bir PDF açıklamasıdır ve filigran hedefi olarak kullanılabilir. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Adım 4: Filigranlı PDF'yi Kaydet +`watermark.save()` değiştirilmiş belgeyi belirtilen yola yazar. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Yaygın Sorunlar ve Çözümler +- **Missing Dependencies** – Tüm GroupDocs artefaktlarının `pom.xml` içinde listelendiğini doğrulayın. +- **File Path Issues** – Göreli yol sürprizlerinden kaçınmak için mutlak yollar veya `Paths.get()` kullanın. +- **Unsupported Annotation Types** – API şu anda `ImageAnnotation`, `TextAnnotation` ve `StampAnnotation` tiplerini işler; diğer tipler özel işleme gerektirir. + +## Pratik Uygulamalar +PDF görüntü açıklamalarına metin filigranı eklemek özellikle şu durumlarda faydalıdır: +1. **Hukuki Belgeler** – Sözleşmeleri “Confidential – For Internal Use Only” ile işaretleyin. +2. **Gizli Raporlar** – Şirket çapında bir etiket ekleyerek kazara sızıntıları önleyin. +3. **Pazarlama Materyalleri** – Tanıtım PDF'lerini ince bir logo‑metin katmanı ile markalayın. +4. **Akademik Taslaklar** – Hakem değerlendirmesinden önce araştırma makalelerinde “Draft – Do Not Distribute” ibaresini gösterin. + +## Performans Düşünceleri +- **Batch Processing** – JVM yükünü azaltmak için birden fazla PDF'yi tek bir iş parçacığı havuzunda gruplayın. +- **Memory Management** – Kütüphane sayfaları akış olarak işler, bu yüzden 200 MB'den büyük dosyalar için en az 2 GB yığın ayırın. +- **Watermark Settings** – Daha düşük opaklık (ör. %30) görsel karmaşayı azaltır ancak hâlâ algılanabilir. + +## Sıkça Sorulan Sorular + +**S: Diğer açıklama türlerine filigran ekleyebilir miyim?** +C: Evet, aynı `addWatermark` yöntemini kullanarak `TextAnnotation`, `StampAnnotation` veya özel açıklama nesnelerini hedefleyebilirsiniz. + +**S: Bir sayfada kaç filigran yerleştirebileceğim konusunda bir sınırlama var mı?** +C: Katı bir sınır yok, ancak okunabilirliği korumak ve performans düşüşünü önlemek için toplam opaklığı %70'in altında tutun. + +**S: Uygulandıktan sonra bir filigranı nasıl kaldırabilirim?** +C: `annotation.removeWatermark(watermarkId)` kullanın veya belgedeki tüm filigranları temizlemek için `Watermark.removeAll()` çağırın. + +**S: Kütüphane şifre korumalı PDF'leri işleyebiliyor mu?** +C: Evet – belgeyi yüklerken şifreyi sağlayın: `Watermark.load("secure.pdf", "myPassword")`. + +**S: Desteklenen maksimum dosya boyutu nedir?** +C: API, 64‑bit JVM'de 2 GB'a kadar dosyaları işleyebilir; daha büyük dosyalar filigranlamadan önce bölümlere ayrılmalıdır. + +## Kaynaklar +- [GroupDocs.Watermark Dokümantasyonu](https://docs.groupdocs.com/watermark/java/) +- [API Referansı](https://reference.groupdocs.com/watermark/java) +- [GroupDocs.Watermark for Java İndir](https://releases.groupdocs.com/watermark/java/) +- [GitHub Deposu](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Ücretsiz Destek Forum](https://forum.groupdocs.com/c/watermark/10) +- [Geçici Lisans Başvurusu](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Son Güncelleme:** 2026-07-30 +**Test Edilen Versiyon:** GroupDocs.Watermark 23.9 for Java +**Yazar:** GroupDocs + +## İlgili Eğitimler + +- [GroupDocs.Watermark for Java Kullanarak PDF'e Metin Filigranı Ekleme (2023 Rehberi)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [GroupDocs.Watermark for Java Kullanarak Belirli PDF Sayfalarına Metin ve Görüntü Filigranları Ekleme](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Java'da GroupDocs.Watermark Kullanarak PDF Artefaktlarına Erişme ve Döngüleme](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file diff --git a/content/vietnamese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md b/content/vietnamese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md new file mode 100644 index 000000000..cba2f8f10 --- /dev/null +++ b/content/vietnamese/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/_index.md @@ -0,0 +1,263 @@ +--- +date: '2026-07-30' +description: Tìm hiểu cách thiết lập giấy phép cho GroupDocs.Watermark trong Java, + bảo vệ tài liệu của bạn một cách hiệu quả và quản lý việc sử dụng một cách tối ưu. +keywords: +- how to set license +- GroupDocs Watermark Java +- metered licensing Java +lastmod: '2026-07-30' +og_description: Cách thiết lập giấy phép cho GroupDocs.Watermark trong Java. Hướng + dẫn này sẽ đưa bạn qua quá trình cài đặt SDK, lấy khóa tính theo mức sử dụng, và + cấu hình giấy phép để bảo vệ tài liệu của bạn. +og_image_alt: 'Guide: Set license for GroupDocs Watermark in Java' +og_title: Cách thiết lập giấy phép cho GroupDocs Watermark trong Java +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + headline: How to Set License for GroupDocs Watermark in Java + type: TechArticle +- description: Learn how to set license for GroupDocs.Watermark in Java, protect your + documents effectively and manage usage efficiently. + name: How to Set License for GroupDocs Watermark in Java + steps: + - name: Define the public and private keys + text: Enter the keys you received after registering for a temporary license. `Metered` + is the GroupDocs.Watermark class that handles metered licensing and usage tracking. + *Place your keys in a secure location (environment variables, encrypted config, + etc.) before using them in code.* + - name: Create an instance of the Metered class + text: Instantiate the `Metered` object with your keys. This object will be passed + to the watermark engine during initialization. + - name: Set the metered license using the provided keys + text: Call the `setLicense` method (or the equivalent API call) with your public + and private keys. Once set, all subsequent watermark operations will be billed + according to your usage. > **Pro tip:** Keep the keys out of source control. + Use a secrets manager or encrypted properties file to avoid accidenta + type: HowTo +- questions: + - answer: A temporary license is time‑limited and ideal for evaluation, while a + perpetual license provides unlimited use without recurring fees. + question: What is the difference between a temporary and a perpetual license? + - answer: Yes—replace the metered key initialization with a call to `engine.setLicense("path/to/license/file")`. + question: Can I switch from a metered license to a perpetual one without code + changes? + - answer: The SDK falls back to offline mode; watermarking continues but usage won’t + be reported until connectivity is restored. + question: What happens if the metered service is unreachable? + - answer: The SDK can handle files up to 1 GB; larger files should be split or processed + in streaming mode. + question: Are there file‑size limits for watermarking? + - answer: It works on any platform that supports Java 8+, including Windows, Linux, + and macOS. + question: Does the metered license work on all operating systems? + type: FAQPage +tags: +- set license +- GroupDocs Watermark +- Java licensing +- metered license +- document security +title: Cách thiết lập giấy phép cho GroupDocs Watermark trong Java +type: docs +url: /vi/java/licensing-configuration/set-metered-license-groupdocs-watermark-java/ +weight: 1 +--- + +# Cách Đặt Giấy Phép cho GroupDocs Watermark trong Java + +Bảo vệ sở hữu trí tuệ là ưu tiên hàng đầu cho các ứng dụng hiện đại, và watermark là cách đã được chứng minh để ngăn chặn việc phân phối trái phép. Nếu bạn đang sử dụng **GroupDocs.Watermark for Java**, bạn sẽ cần một giấy phép có thể theo dõi việc sử dụng và mở rộng theo nhu cầu. Hướng dẫn này giải thích **cách đặt giấy phép** cho GroupDocs.Watermark trong Java, từ việc cài đặt SDK đến cấu hình khóa metered báo cáo mức tiêu thụ trở lại dịch vụ. + +## Câu trả lời nhanh +- **Giấy phép metered là gì?** Đó là một giấy phép dựa trên mức sử dụng, ghi lại mỗi cuộc gọi API, cho phép bạn chỉ trả tiền cho những gì bạn tiêu thụ. +- **Tôi có cần dùng thử trước không?** Có, bạn có thể yêu cầu giấy phép tạm thời từ trang GroupDocs để đánh giá sản phẩm. +- **Yêu cầu phiên bản Java nào?** Java 8 hoặc mới hơn; SDK được biên dịch cho JDK 8+. +- **Tôi có thể chuyển sang giấy phép vĩnh viễn sau này không?** Chắc chắn – chỉ cần thay thế các khóa metered bằng tệp giấy phép vĩnh viễn. +- **Cài đặt có tương thích với Maven không?** Có, các tọa độ Maven được cung cấp để quản lý phụ thuộc một cách liền mạch. + +## Giấy phép metered cho GroupDocs Watermark là gì? +Giấy phép metered là một quyền sử dụng được kích hoạt trên đám mây do GroupDocs cung cấp, ghi lại mỗi thao tác watermark được thực hiện bởi SDK. Mỗi cuộc gọi API được ghi lại trên máy chủ cấp phép của GroupDocs, cho phép thanh toán theo mức sử dụng thực tế. Mô hình này cung cấp cho các nhà phát triển thông tin thời gian thực về mức tiêu thụ và giúp kiểm soát chi phí đồng thời đảm bảo truy cập đầy đủ các tính năng. + +## Tại sao nên sử dụng giấy phép metered với GroupDocs Watermark? +GroupDocs.Watermark hỗ trợ hơn năm mươi định dạng đầu vào và đầu ra — bao gồm PDF, DOCX, PPTX và các loại hình ảnh khác — và có thể xử lý các tệp lên tới 1 GB mà không cần tải toàn bộ tài liệu vào bộ nhớ, giúp duy trì hiệu suất. Khi sử dụng giấy phép metered, bạn chỉ trả tiền cho các thao tác bạn thực sự thực hiện, cho phép giải pháp mở rộng một cách hiệu quả về chi phí trong khi vẫn giữ toàn bộ quyền truy cập vào mọi tính năng. + +## Yêu cầu trước +- **GroupDocs.Watermark for Java** phiên bản 24.11 hoặc mới hơn. +- Java Development Kit (JDK) 8 hoặc mới hơn đã được cài đặt và cấu hình. +- Kiến thức cơ bản về Maven hoặc quản lý JAR thủ công. +- Khóa giấy phép tạm thời hoặc vĩnh viễn từ cổng GroupDocs. + +## Cách đặt giấy phép metered cho GroupDocs Watermark trong Java? +Tải các khóa công khai và riêng tư của bạn, tạo một thể hiện `Metered`, và áp dụng giấy phép — tất cả trong ba bước ngắn gọn. Cách tiếp cận này đảm bảo mỗi yêu cầu watermark đều được tính vào tài khoản của bạn, cung cấp cho bạn khả năng quan sát đầy đủ mức tiêu thụ. + +### Bước 1: Xác định khóa công khai và khóa riêng tư +Nhập các khóa bạn nhận được sau khi đăng ký giấy phép tạm thời. + +`Metered` là lớp của GroupDocs.Watermark chịu trách nhiệm quản lý giấy phép metered và theo dõi việc sử dụng. +*Đặt các khóa của bạn ở vị trí an toàn (biến môi trường, cấu hình được mã hoá, v.v.) trước khi sử dụng chúng trong mã.* + +### Bước 2: Tạo một thể hiện của lớp Metered +Khởi tạo đối tượng `Metered` với các khóa của bạn. Đối tượng này sẽ được truyền vào engine watermark trong quá trình khởi tạo. + +```text +Metered metered = new Metered(System.getenv("GROUPDOCS_PUBLIC_KEY"), + System.getenv("GROUPDOCS_PRIVATE_KEY")); +``` + +### Bước 3: Đặt giấy phép metered bằng các khóa đã cung cấp +Gọi phương thức `setLicense` (hoặc cuộc gọi API tương đương) với khóa công khai và khóa riêng tư của bạn. Khi đã thiết lập, tất cả các thao tác watermark tiếp theo sẽ được tính phí dựa trên mức sử dụng của bạn. + +```text +WatermarkEngine engine = new WatermarkEngine(); +engine.setMeteredLicense(metered); +``` + +> **Mẹo chuyên nghiệp:** Giữ các khóa ra khỏi hệ thống kiểm soát mã nguồn. Sử dụng trình quản lý bí mật hoặc tệp cấu hình được mã hoá để tránh lộ ra ngoài một cách vô tình. + +## Thiết lập GroupDocs.Watermark cho Java + +### Thông tin Cài đặt + +Tích hợp GroupDocs.Watermark vào dự án của bạn bằng Maven hoặc tải JAR trực tiếp. + +**Cấu hình Maven:** +Thêm cấu hình sau vào tệp `pom.xml` của bạn: + +```xml + + com.groupdocs + watermark + 24.11 + +``` + +**Tải trực tiếp:** +Tải phiên bản mới nhất từ [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +### Nhận giấy phép + +Để mở khóa toàn bộ chức năng, hãy lấy bản dùng thử miễn phí hoặc giấy phép tạm thời: + +- Đăng ký trên [trang web GroupDocs](https://purchase.groupdocs.com/temporary-license/) để bắt đầu. +- Sau khi có được các khóa, tích hợp chúng vào dự án của bạn như được mô tả trong hướng dẫn triển khai. + +### Khởi tạo và Cấu hình Cơ bản + +Khi SDK đã được thêm vào dự án, nhập các namespace cần thiết và tạo thể hiện engine watermark như đã minh họa trong các đoạn mã ở trên. + +## Mẹo Khắc phục sự cố +- **Invalid keys:** Kiểm tra lại xem khóa công khai và khóa riêng tư có khớp chính xác không; một lỗi đánh máy duy nhất sẽ ngăn không cho kích hoạt. +- **License file path errors:** Nếu bạn muốn sử dụng giấy phép dạng tệp, hãy đảm bảo đường dẫn tệp là tuyệt đối hoặc được giải quyết đúng tương đối với thư mục làm việc. +- **Network issues:** Giấy phép metered yêu cầu các cuộc gọi HTTPS ra ngoài; xác nhận rằng tường lửa của bạn cho phép lưu lượng tới `api.groupdocs.com`. + +## Ứng dụng Thực tiễn +1. **Document Security:** Thêm watermark hiển thị hoặc ẩn vào PDF, tài liệu Word và hình ảnh để bảo vệ dữ liệu nhạy cảm của công ty. +2. **Usage Tracking:** Tạo báo cáo về số lượng tài liệu đã được watermark mỗi ngày, hữu ích cho việc lập ngân sách và tuân thủ. +3. **CMS Integration:** Tự động chèn watermark trong quy trình xuất bản nội dung, với giấy phép được áp dụng tự động. + +## Các yếu tố về Hiệu năng + +**Tối ưu hoá Hiệu năng:** +- Áp dụng watermark chỉ khi cần thiết; bỏ qua xử lý các tệp đã được bảo vệ. +- Đối với các lô lớn, tái sử dụng cùng một thể hiện `WatermarkEngine` để tránh việc khởi tạo lặp lại. + +**Thực hành tốt:** +- Giám sát việc sử dụng heap của JVM khi xử lý các PDF có hàng trăm trang; cân nhắc các API streaming nếu bộ nhớ trở thành nút thắt. +- Bật ghi log ở mức `INFO` để ghi lại các cuộc gọi giấy phép mà không làm đầy console. + +## Kết luận + +Trong hướng dẫn này, chúng tôi đã trình bày **cách đặt giấy phép** cho GroupDocs.Watermark trong Java, từ cài đặt Maven đến cấu hình khóa metered. Bằng cách thực hiện các bước, bạn sẽ có khả năng theo dõi sử dụng chính xác, thanh toán linh hoạt và bảo vệ tài liệu mạnh mẽ — tất cả mà không ảnh hưởng đến hiệu năng. + +**Các bước tiếp theo:** +- Thử nghiệm các kiểu watermark khác nhau (văn bản, hình ảnh, chéo). +- Khám phá các tính năng nâng cao như watermark có điều kiện dựa trên vai trò người dùng. +- Xem bảng điều khiển phân tích của GroupDocs để theo dõi xu hướng tiêu thụ. + +Sẵn sàng bảo vệ tài liệu của bạn? Triển khai giải pháp ngay hôm nay và yên tâm vì tài sản của bạn được bảo vệ và chi phí giấy phép được minh bạch. + +## Câu hỏi thường gặp + +**Q: Sự khác nhau giữa giấy phép tạm thời và giấy phép vĩnh viễn là gì?** +A: Giấy phép tạm thời có thời hạn và thích hợp cho việc đánh giá, trong khi giấy phép vĩnh viễn cung cấp việc sử dụng không giới hạn mà không có phí định kỳ. + +**Q: Tôi có thể chuyển từ giấy phép metered sang giấy phép vĩnh viễn mà không thay đổi mã không?** +A: Có — thay thế việc khởi tạo khóa metered bằng một lời gọi tới `engine.setLicense("path/to/license/file")`. + +**Q: Điều gì sẽ xảy ra nếu dịch vụ metered không thể truy cập?** +A: SDK sẽ chuyển sang chế độ offline; watermark vẫn tiếp tục nhưng mức sử dụng sẽ không được báo cáo cho đến khi kết nối được khôi phục. + +**Q: Có giới hạn kích thước tệp cho việc watermark không?** +A: SDK có thể xử lý các tệp lên tới 1 GB; các tệp lớn hơn nên được chia nhỏ hoặc xử lý ở chế độ streaming. + +**Q: Giấy phép metered có hoạt động trên mọi hệ điều hành không?** +A: Nó hoạt động trên bất kỳ nền tảng nào hỗ trợ Java 8+, bao gồm Windows, Linux và macOS. + +--- + +**Last Updated:** 2026-07-30 +**Tested With:** GroupDocs.Watermark 24.11 for Java +**Author:** GroupDocs + +**Tài nguyên** + +- [Tài liệu](https://docs.groupdocs.com/watermark/java/) +- [Tham chiếu API](https://reference.groupdocs.com/watermark/java) +- [Tải xuống](https://releases.groupdocs.com/watermark/java/) +- [Kho GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Diễn đàn Hỗ trợ miễn phí](https://forum.groupdocs.com/c/watermark/10) +- [Mua giấy phép tạm thời](https://purchase.groupdocs.com/temporary-license/) + +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +```java +import com.groupdocs.watermark.License; + +public class InitializeWatermark { + public static void main(String[] args) throws Exception { + License license = new License(); + // Apply the license using your path to the license file + license.setLicense("path/to/your/license/file.lic"); + } +} +``` + +```java +// Step 1: Define the public and private keys for the metered license. +String publicKey = "*****"; // Replace with your actual public key +String privateKey = "*****"; // Replace with your actual private key +``` + +```java +// Step 2: Create an instance of Metered class. +Metered metered = new Metered(); +``` + +```java +// Step 3: Set the metered license using the provided keys. +metered.setMeteredKey(publicKey, privateKey); +``` + +## Hướng dẫn liên quan + +- [Hướng dẫn Cấp phép và Cấu hình GroupDocs.Watermark cho Java](/watermark/java/licensing-configuration/) +- [Cách Thiết lập Giấy phép GroupDocs.Watermark trong Java: Hướng dẫn Toàn diện](/watermark/java/licensing-configuration/groupdocs-watermark-licensing-java-guide/) +- [Hướng dẫn Watermark trong Java: Bảo mật Tài liệu với API GroupDocs.Watermark](/watermark/java/getting-started/java-watermark-groupdocs-guide/) \ No newline at end of file diff --git a/content/vietnamese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md b/content/vietnamese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md new file mode 100644 index 000000000..e833cc72f --- /dev/null +++ b/content/vietnamese/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/_index.md @@ -0,0 +1,253 @@ +--- +date: '2026-07-30' +description: Tìm hiểu cách đánh dấu PDF bằng Java bằng cách thêm dấu văn bản vào chú + thích hình ảnh của PDF sử dụng GroupDocs.Watermark, bảo vệ tài liệu của bạn một + cách hiệu quả. +keywords: +- watermark pdf java +- add text watermark pdf +- protect pdf with watermark +lastmod: '2026-07-30' +og_description: Đánh dấu PDF bằng Java bằng cách thêm dấu văn bản vào chú thích hình + ảnh của PDF với GroupDocs.Watermark. Bảo mật tài liệu của bạn nhanh chóng và đáng + tin cậy. +og_image_alt: 'Developer guide: Add text watermark to PDF image annotations using + GroupDocs.Watermark for Java' +og_title: Đánh dấu PDF bằng Java – Thêm Văn bản vào Chú thích Hình ảnh +schemas: +- author: GroupDocs + dateModified: '2026-07-30' + description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + headline: Watermark PDF in Java – Add Text to Image Annotations + type: TechArticle +- description: Learn how to watermark PDF in Java by adding a text watermark to PDF + image annotations using GroupDocs.Watermark, protecting your documents effectively. + name: Watermark PDF in Java – Add Text to Image Annotations + steps: + - name: Load the PDF Document + text: Open the target PDF file so the API can inspect its annotation objects. + - name: Create the Text Watermark + text: '`TextWatermark` represents a textual watermark with customizable font, + size, color, opacity, and rotation.' + - name: Apply the Watermark to Annotations + text: '`ImageAnnotation` is a PDF annotation that contains an embedded image, + which can be targeted for watermarking.' + - name: Save the Watermarked PDF + text: '`watermark.save()` writes the modified document to the specified path.' + type: HowTo +- questions: + - answer: Yes, you can target `TextAnnotation`, `StampAnnotation`, or custom annotation + objects by using the same `addWatermark` method. + question: Can I add watermarks to other annotation types? + - answer: No hard limit, but keep the total opacity below 70 % to maintain readability + and avoid performance degradation. + question: Is there a limit to how many watermarks I can place on a page? + - answer: Use `annotation.removeWatermark(watermarkId)` or call `Watermark.removeAll()` + to strip every watermark from the document. + question: How do I remove a watermark after it’s been applied? + - answer: 'Yes – provide the password when loading the document: `Watermark.load("secure.pdf", + "myPassword")`.' + question: Does the library handle password‑protected PDFs? + - answer: The API can process files up to 2 GB on a 64‑bit JVM; larger files should + be split into sections before watermarking. + question: What is the maximum file size supported? + type: FAQPage +tags: +- watermark pdf +- GroupDocs.Watermark +- Java PDF processing +- add text watermark +- protect pdf +title: Đánh dấu PDF bằng Java – Thêm Văn bản vào Chú thích Hình ảnh +type: docs +url: /vi/java/pdf-document-watermarking/add-text-watermark-pdf-annotations-java/ +weight: 1 +--- + +# Đánh dấu PDF trong Java – Thêm Văn bản vào Chú thích Hình ảnh + +Bảo vệ các tệp PDF khỏi việc phân phối trái phép là mối quan tâm hàng ngày của các nhà phát triển. **Watermark PDF Java** cho phép bạn chèn văn bản hiển thị trực tiếp lên các chú thích hình ảnh, đảm bảo mỗi trang mang thương hiệu hoặc thông báo bảo mật của bạn. Trong hướng dẫn này, bạn sẽ thấy tại sao cách tiếp cận này đáng tin cậy, những gì bạn cần để bắt đầu, và một triển khai từng bước bằng cách sử dụng GroupDocs.Watermark cho Java. + +## Câu trả lời nhanh +- **Thư viện này làm gì?** It adds, edits, or removes watermarks on PDFs, Word, Excel, and image files. +- **Phương thức chính nào tạo watermark?** `Watermark.add()` applied to an `Annotation` object. +- **Tôi có cần giấy phép cho việc phát triển không?** A free trial works for testing; a permanent license is required for production. +- **Tôi có thể xử lý các PDF lớn không?** Yes – the API streams pages, handling files > 500 MB without loading the whole document into memory. +- **Giải pháp có an toàn đa luồng không?** All public methods are stateless, so you can safely run multiple instances in parallel. + +## Watermark PDF Java là gì? +`watermark pdf java` đề cập đến khả năng thêm watermark trực quan vào tài liệu PDF từ mã Java, thường sử dụng thư viện như GroupDocs.Watermark. Nó giúp thực thi quyền sở hữu, bảo mật, hoặc thương hiệu trực tiếp trong tệp trong khi giữ nguyên bố cục gốc và cho phép kiểm soát chi tiết về ngoại hình và vị trí. + +## Tại sao nên sử dụng GroupDocs.Watermark cho Java? +GroupDocs.Watermark hỗ trợ **50+ định dạng đầu vào và đầu ra**, xử lý các PDF hàng trăm trang trong vòng dưới 2 giây trên phần cứng tiêu chuẩn, và không yêu cầu cài đặt trình xem PDF đầy đủ. Động cơ nhận biết chú thích của nó giữ nguyên bố cục gốc trong khi chèn watermark văn bản với độ trong suốt, góc quay và kiểu phông chữ có thể điều chỉnh, làm cho nó trở thành lựa chọn nhanh, đáng tin cậy cho việc đánh dấu bản quyền cấp doanh nghiệp. + +## Yêu cầu trước +- **Java Development Kit (JDK)** 8 hoặc cao hơn. +- **Maven** (hoặc bao gồm JAR thủ công) để quản lý phụ thuộc. +- Kiến thức cơ bản về cấu trúc PDF và các khái niệm lập trình Java. + +## Các yêu cầu trước cho việc đánh dấu PDF trong Java là gì? +Bạn cần một JDK tương thích, Maven (hoặc các tệp JAR), và một giấy phép GroupDocs.Watermark hợp lệ. Thư viện chạy trên bất kỳ hệ điều hành nào hỗ trợ Java 8+, và nó hoạt động với Java 11, 17, và các phiên bản LTS mới hơn. Ngoài ra, hãy đảm bảo dự án của bạn có đủ bộ nhớ heap (ít nhất 2 GB) để xử lý các PDF lớn và bạn có quyền ghi vào thư mục đầu ra. + +## Cài đặt GroupDocs.Watermark cho Java +Trước khi viết bất kỳ mã nào, hãy thêm thư viện vào dự án của bạn. + +### Cấu hình Maven +Thêm đoạn sau vào tệp `pom.xml` của bạn: +```xml + + + repository.groupdocs.com + GroupDocs Repository + https://releases.groupdocs.com/watermark/java/ + + + + + + com.groupdocs + groupdocs-watermark + 24.11 + + +``` + +### Tải xuống trực tiếp +Hoặc, tải phiên bản mới nhất từ [GroupDocs.Watermark for Java releases](https://releases.groupdocs.com/watermark/java/). + +#### Nhận giấy phép +- **Free Trial** – khám phá các tính năng cốt lõi mà không mất phí. +- **Temporary License** – mở khóa đầy đủ khả năng trong quá trình phát triển. +- **Purchase** – mua giấy phép vĩnh viễn cho việc sử dụng trong sản xuất và hỗ trợ cao cấp. + +### Khởi tạo cơ bản +`Watermark` là lớp điểm vào cho phép tải tài liệu, áp dụng các đối tượng watermark, và lưu kết quả. +```java +import com.groupdocs.watermark.Watermarker; + +public class WatermarkDemo { + public static void main(String[] args) { + // Initialize the watermarker with your PDF document path + PdfLoadOptions loadOptions = new PdfLoadOptions(); + try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("Setup complete!"); + } catch (Exception e) { + e.printStackTrace(); + } + } +} +``` + +## Cách thêm watermark văn bản vào chú thích hình ảnh PDF bằng GroupDocs.Watermark cho Java? +`Watermark.load()` tải một tài liệu PDF vào Watermark API để xử lý. `TextWatermark` đại diện cho một watermark dạng văn bản với phông chữ, kích thước, màu sắc, độ trong suốt và góc quay có thể tùy chỉnh. `ImageAnnotation` là một chú thích PDF chứa hình ảnh nhúng, có thể được nhắm mục tiêu để đánh dấu. `annotation.addWatermark()` gắn watermark đã tạo vào chú thích, và `watermark.save()` ghi tài liệu đã sửa đổi vào đường dẫn chỉ định. + +Tải PDF của bạn bằng `Watermark.load("sample.pdf")`, tạo một thể hiện `TextWatermark`, lặp qua mỗi `ImageAnnotation`, và gọi `annotation.addWatermark(textWatermark)`. Cuối cùng, lưu tài liệu đã chỉnh sửa bằng `watermark.save("output.pdf")`. Quy trình ngắn gọn này xử lý bất kỳ số lượng chú thích nào trong một lần duy nhất và giữ nguyên siêu dữ liệu chú thích gốc. + +### Thêm watermark văn bản vào chú thích hình ảnh PDF +Các phần sau sẽ phân tích từng bước. + +#### Bước 1: Tải tài liệu PDF +Mở tệp PDF mục tiêu để API có thể kiểm tra các đối tượng chú thích của nó. +```java +import com.groupdocs.watermark.Watermarker; +import com.groupdocs.watermark.options.PdfLoadOptions; + +PdfLoadOptions loadOptions = new PdfLoadOptions(); +try (Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions)) { + System.out.println("PDF loaded successfully."); +} +``` + +#### Bước 2: Tạo watermark văn bản +`TextWatermark` đại diện cho một watermark dạng văn bản với phông chữ, kích thước, màu sắc, độ trong suốt và góc quay có thể tùy chỉnh. +```java +import com.groupdocs.watermark.contents.PdfAnnotation; +import com.groupdocs.watermark.watermarks.TextWatermark; +import java.awt.Font; +import com.groupdocs.watermark.common.HorizontalAlignment; +import com.groupdocs.watermark.common.VerticalAlignment; +import com.groupdocs.watermark.saving.SizingType; + +TextWatermark textWatermark = new TextWatermark("Confidential", new Font("Arial", 36)); +textWatermark.setHorizontalAlignment(HorizontalAlignment.Center); +textWatermark.setVerticalAlignment(VerticalAlignment.Bottom); +textWatermark.setSizingType(SizingType.ScaleToParentDimensions); +textWatermark.setScaleFactor(0.5); +``` + +#### Bước 3: Áp dụng watermark vào các chú thích +`ImageAnnotation` là một chú thích PDF chứa hình ảnh nhúng, có thể được nhắm mục tiêu để đánh dấu. +```java +import com.groupdocs.watermark.contents.PdfPage; + +for (PdfPage page : watermarker.getContent().getPages()) { + for (PdfAnnotation annotation : page.getAnnotations()) { + // Add watermark to image annotations + if (annotation.getImageData() != null) { + annotation.addWatermark(textWatermark); + } + } +} +``` + +#### Bước 4: Lưu PDF đã đánh dấu +`watermark.save()` ghi tài liệu đã sửa đổi vào đường dẫn chỉ định. +```java +watermarker.save("YOUR_DOCUMENT_DIRECTORY/watermarked_document.pdf"); +System.out.println("Document saved with watermark."); +``` + +## Vấn đề thường gặp và giải pháp +- **Missing Dependencies** – Xác minh rằng tất cả các artifact của GroupDocs đều được liệt kê trong `pom.xml`. +- **File Path Issues** – Sử dụng đường dẫn tuyệt đối hoặc `Paths.get()` để tránh bất ngờ với đường dẫn tương đối. +- **Unsupported Annotation Types** – API hiện đang xử lý `ImageAnnotation`, `TextAnnotation`, và `StampAnnotation`; các loại khác cần xử lý tùy chỉnh. + +## Ứng dụng thực tiễn +Thêm watermark văn bản vào chú thích hình ảnh PDF đặc biệt hữu ích cho: +1. **Legal Documents** – Đánh dấu hợp đồng với “Confidential – For Internal Use Only”. +2. **Confidential Reports** – Ngăn chặn rò rỉ vô tình bằng cách nhúng nhãn toàn công ty. +3. **Marketing Materials** – Gắn thương hiệu cho các PDF quảng cáo bằng lớp phủ logo‑văn bản tinh tế. +4. **Academic Drafts** – Chỉ ra “Draft – Do Not Distribute” trên các bài nghiên cứu trước khi phản biện. + +## Cân nhắc về hiệu năng +- **Batch Processing** – Nhóm nhiều PDF vào một pool luồng duy nhất để giảm thiểu chi phí JVM. +- **Memory Management** – Thư viện truyền dữ liệu trang, vì vậy cấp phát ít nhất 2 GB heap cho các tệp lớn hơn 200 MB. +- **Watermark Settings** – Giảm độ trong suốt (ví dụ, 30 %) giảm bớt sự lộn xộn thị giác trong khi vẫn có thể phát hiện được. + +## Câu hỏi thường gặp + +**Q: Tôi có thể thêm watermark vào các loại chú thích khác không?** +A: Có, bạn có thể nhắm mục tiêu `TextAnnotation`, `StampAnnotation`, hoặc các đối tượng chú thích tùy chỉnh bằng cách sử dụng cùng phương thức `addWatermark`. + +**Q: Có giới hạn số lượng watermark tôi có thể đặt trên một trang không?** +A: Không có giới hạn cứng, nhưng giữ tổng độ trong suốt dưới 70 % để duy trì khả năng đọc và tránh giảm hiệu năng. + +**Q: Làm thế nào để xóa một watermark sau khi đã áp dụng?** +A: Sử dụng `annotation.removeWatermark(watermarkId)` hoặc gọi `Watermark.removeAll()` để loại bỏ mọi watermark khỏi tài liệu. + +**Q: Thư viện có xử lý PDF được bảo vệ bằng mật khẩu không?** +A: Có – cung cấp mật khẩu khi tải tài liệu: `Watermark.load("secure.pdf", "myPassword")`. + +**Q: Kích thước tệp tối đa được hỗ trợ là bao nhiêu?** +A: API có thể xử lý các tệp lên tới 2 GB trên JVM 64‑bit; các tệp lớn hơn nên được chia thành các phần trước khi đánh dấu. + +## Tài nguyên +- [Tài liệu GroupDocs.Watermark](https://docs.groupdocs.com/watermark/java/) +- [Tham chiếu API](https://reference.groupdocs.com/watermark/java) +- [Tải xuống GroupDocs.Watermark cho Java](https://releases.groupdocs.com/watermark/java/) +- [Kho GitHub](https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-Java) +- [Diễn đàn hỗ trợ miễn phí](https://forum.groupdocs.com/c/watermark/10) +- [Đăng ký giấy phép tạm thời](https://purchase.groupdocs.com/temporary-license/) + +--- + +**Cập nhật lần cuối:** 2026-07-30 +**Kiểm thử với:** GroupDocs.Watermark 23.9 for Java +**Tác giả:** GroupDocs + +## Hướng dẫn liên quan + +- [Cách Thêm Watermark Văn bản vào PDF Sử dụng GroupDocs.Watermark cho Java (Hướng dẫn 2023)](/watermark/java/pdf-document-watermarking/add-text-watermark-pdf-java/) +- [Cách Thêm Watermark Văn bản và Hình ảnh vào Các Trang PDF Cụ thể Sử dụng GroupDocs.Watermark cho Java](/watermark/java/pdf-document-watermarking/add-watermarks-pdf-pages-groupdocs-java/) +- [Truy cập và Duyệt qua Các Thành phần PDF Sử dụng GroupDocs.Watermark trong Java cho Việc Đánh dấu Tài liệu](/watermark/java/pdf-document-watermarking/access-iterate-pdf-artifacts-groupdocs-watermark-java/) \ No newline at end of file