JDK动态代理与CGLib动态代理的区别对比

public interface ForumService {
 void removeTopic(int topicId);
 void removeForum(int forumId);
}

public class ForumServiceImpl implements ForumService {
 public void removeTopic(int topicId) {
 // PerformanceMonitor.begin("com.hand.proxy.ForumServiceImpl.removeTopic");
 System.out.println("模拟删除Topic记录:" + topicId);
 try {
  Thread.sleep(20);
 } catch (InterruptedException e) {
  e.printStackTrace();
 }
 // PerformanceMonitor.end();
 }
 public void removeForum(int forumId) {
 // PerformanceMonitor.begin("com.hand.proxy.ForumServiceImpl.removeForum");
 System.out.println("模拟删除Forum记录:" + forumId);
 try {
  Thread.sleep(20);
 } catch (InterruptedException e) {
  e.printStackTrace();
 }
 // PerformanceMonitor.end();
 }
}

public class PerformanceMonitor {
 // 通过一个ThreadLocal保存与调用线程相关的性能监视信息
 private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
 // 启动对某一目标方法的性能监视
 public static void begin(String method) {
 System.out.println("begin monitor...");
 MethodPerformance mp = new MethodPerformance(method);
 performanceRecord.set(mp);
 }
 public static void end() {
 System.out.println("end monitor...");
 MethodPerformance mp = performanceRecord.get();
 // 打印出方法性能监视的结果信息
 mp.printPerformance();
 }
}

public class PerformanceMonitor {
 // 通过一个ThreadLocal保存与调用线程相关的性能监视信息
 private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
 // 启动对某一目标方法的性能监视
 public static void begin(String method) {
 System.out.println("begin monitor...");
 MethodPerformance mp = new MethodPerformance(method);
 performanceRecord.set(mp);
 }
 public static void end() {
 System.out.println("end monitor...");
 MethodPerformance mp = performanceRecord.get();
 // 打印出方法性能监视的结果信息
 mp.printPerformance();
 }
}

public class PerformanceMonitor {
 // 通过一个ThreadLocal保存与调用线程相关的性能监视信息
 private static ThreadLocal<MethodPerformance> performanceRecord = new ThreadLocal<MethodPerformance>();
 // 启动对某一目标方法的性能监视
 public static void begin(String method) {
 System.out.println("begin monitor...");
 MethodPerformance mp = new MethodPerformance(method);
 performanceRecord.set(mp);
 }
 public static void end() {
 System.out.println("end monitor...");
 MethodPerformance mp = performanceRecord.get();
 // 打印出方法性能监视的结果信息
 mp.printPerformance();
 }
}

public class ForumServiceTest {
 @Test
 public void proxy() {
 ForumService forumService = new ForumServiceImpl();
 PerformanceHandler handler = new PerformanceHandler(forumService);
 ForumService proxy = (ForumService) Proxy.newProxyInstance(forumService.getClass().getClassLoader(),
  forumService.getClass().getInterfaces(), handler);
 proxy.removeForum(10);
 proxy.removeTopic(1012);
 }
}

 <!-- https://mvnrepository.com/artifact/cglib/cglib -->
 <dependency>
  <groupId>cglib</groupId>
  <artifactId>cglib</artifactId>
  <version>2.2.2</version>
 </dependency>

public class CglibProxy implements MethodInterceptor {
 private Enhancer enhancer = new Enhancer();
 public Object getProxy(Class clazz) {
 enhancer.setSuperclass(clazz);
 enhancer.setCallback(this);
 return enhancer.create();
 }
 public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
 PerformanceMonitor.begin(obj.getClass().getName() + "." + method.getName());
 Object result = proxy.invokeSuper(obj, args);
 PerformanceMonitor.end();
 return result;
 }
}

public class ForumServiceTest2 {
 @Test
 public void proxy() {
 CglibProxy proxy = new CglibProxy();
 ForumServiceImpl forumService = (ForumServiceImpl) proxy.getProxy(ForumServiceImpl.class);
 forumService.removeForum(10);
 forumService.removeTopic(1023);
 }
}