JDK动态代理实例

public interface Hello {public void hello();}

 

import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;import java.lang.reflect.Proxy;import org.Hello;public class SayHello implements Hello{@Overridepublic void hello() {// TODO Auto-generated method stubSystem.out.println("hello");}static class MyInvocationHandler implements InvocationHandler{private Object target;public MyInvocationHandler(Object target){this.target=target;}@Overridepublic Object invoke(Object proxy, Method method, Object[] args)throws Throwable {// TODO Auto-generated method stubSystem.out.println(method.getName()+"-------start");Object result=method.invoke(target, args);System.out.println(method.getName()+"--------end");return result;}}static class ProxyFactory{InvocationHandler h;Class cls;public ProxyFactory(String className,InvocationHandler h) throws ClassNotFoundException{cls=Class.forName(className);this.h=h;}public Object create(){return Proxy.newProxyInstance(cls.getClassLoader(), cls.getInterfaces(), h);}}public static void main(String[] args) throws ClassNotFoundException {Hello s=new SayHello();InvocationHandler h=new MyInvocationHandler(s);ProxyFactory proxyFactory=new ProxyFactory(SayHello.class.getName(), h);Hello sf=(Hello) proxyFactory.create();sf.hello();}}-----------------会输出hello-------starthello--------end

 

大家可以debug，看看代码怎么走的。

下次研究过后会给出更详细的说明，^_^ 要睡觉了