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); }}