update:成功运行测试MyClassLoaderTest#testLoadShengSheng输出正确结果

src/main/java/club/shengsheng/MyClassLoader.java

@@ -1,9 +1,70 @@
 package club.shengsheng;
 
 
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
 /**
  * @author gongxuanzhangmelt@gmail.com
  **/
 public class MyClassLoader extends ClassLoader {
+    public MyClassLoader(ClassLoader parent) {
+        super(parent);
+    }
+
+    public MyClassLoader() {
+        super();
+    }
+
+    // 加载 链接 初始化
+    // 链接 校验、准备、解析
+
+    @Override
+    protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        synchronized (getClassLoadingLock(name)) {
+            Class<?> c = findLoadedClass(name);
+            if (c == null) {
+                // 打破双亲委派，只加载 tech.insight 包下的类
+                if (name.startsWith("tech.insight")) {
+                    try {
+                        c = findClass(name);
+                    } catch (ClassNotFoundException e) {
+                        // 可以选择不处理或 fallback 给父加载器
+                        throw e;
+                    }
+                } else {
+                    // JDK类或第三方库依然委托父加载器
+                    c = getParent().loadClass(name);
+                }
+            }
+
+            if (resolve) {
+                resolveClass(c);
+            }
+
+            return c;
+        }
+    }
 
+    @Override
+    protected Class<?> findClass(String name) throws ClassNotFoundException {
+        if (name.startsWith("tech.insight")) {
+            // 从项目根目录读取加密的class文件
+            File encryptedFile = new File("加密.class");
+            byte[] bytes = new byte[0];
+            try {
+                bytes = Files.readAllBytes(encryptedFile.toPath());
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+            // 解密：每个字节-1
+            for (int i = 0; i < bytes.length; i++) {
+                bytes[i] = (byte) (bytes[i] - 1);
+            }
+            return defineClass(name, bytes, 0, bytes.length);
+        } else {
+            return super.findClass(name);
+        }
+    }
 }