ADD file via upload

AdvancedDynamicProxy.java

@@ -0,0 +1,45 @@
+import java.lang.reflect.*;
+
+// 业务接口
+interface UserService {
+    String getUser(int id);
+}
+
+// 真实业务类
+class UserServiceImpl implements UserService {
+    public String getUser(int id) {
+        return "User-" + id;
+    }
+}
+
+// 动态代理处理器
+class LoggingProxyHandler implements InvocationHandler {
+    private Object target;
+
+    public LoggingProxyHandler(Object target) {
+        this.target = target;
+    }
+
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        System.out.println("Before method: " + method.getName());
+        Object result = method.invoke(target, args);
+        System.out.println("After method: " + method.getName());
+        return result;
+    }
+}
+
+// 客户端使用
+public class AdvancedDynamicProxy {
+    public static void main(String[] args) {
+        UserService realService = new UserServiceImpl();
+        
+        UserService proxyInstance = (UserService) Proxy.newProxyInstance(
+            UserService.class.getClassLoader(),
+            new Class[]{UserService.class},
+            new LoggingProxyHandler(realService)
+        );
+        
+        System.out.println(proxyInstance.getUser(101));
+    }
+}