finish classloader

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

@@ -1,9 +1,47 @@
 package club.shengsheng;
 
 
+import com.sun.source.tree.SynchronizedTree;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
 /**
  * @author gongxuanzhangmelt@gmail.com
  **/
 public class MyClassLoader extends ClassLoader {
 
+    @Override
+    public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        synchronized(getClassLoadingLock(name)){
+            Class<?> c = findLoadedClass(name);
+            if (c == null){
+                if (name.startsWith("tech")){
+                    c = findClass(name);
+                }else{
+                    c = getParent().loadClass(name);
+                }
+            }
+            if(resolve){
+                resolveClass(c);
+            }
+            return c;
+        }
+    }
+
+    @Override
+    protected Class<?> findClass(String name) throws ClassNotFoundException {
+        String replace = "加密.class";
+        File classFile = new File(replace);
+        try {
+            byte[] bytes = Files.readAllBytes(classFile.toPath());
+            for(int i = 0; i < bytes.length; i ++){
+                bytes[i] = (byte)(bytes[i] - 1);
+            }
+            return defineClass(name, bytes, 0, bytes.length);
+        } catch (Exception e) {
+            throw new ClassNotFoundException(name);
+        }
+    }
 }

src/test/java/club/shengsheng/classloader/MyClassLoaderTest.java

@@ -14,7 +14,7 @@ class MyClassLoaderTest {
 
     @Test
     void testLoadShengSheng() throws Exception {
-        Class<?> shengshengClass = new MyClassLoader().loadClass("tech.insight.ShengSheng");
+        Class<?> shengshengClass = new MyClassLoader().loadClass("tech.insight.ShengSheng", false);
         Constructor<?> constructor = shengshengClass.getConstructor();
         Object shengsheng = constructor.newInstance();
         Method declaredMethod = shengshengClass.getDeclaredMethod("say");