代理模式之动态代理

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;


//接口
interface MyInterface {
	public void action();
}

// 被代理类
class MyObject implements MyInterface {
	@Override
	public void action() {
		System.out.println("我是被代理类,运行action！

"); } } //被代理接口 interface ClothFactory{ public void productCloth(); } //被代理类 class NikeClothFactory implements ClothFactory{ @Override public void productCloth() { System.out.println("我是被代理类，Nike 生产衣服"); } } //实现InvocationHandler接口的子类 class MyInvocationhandler implements InvocationHandler { private Object obj; public void setObject(Object obj) { this.obj = obj; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { System.out.println("动态代理类运行，收代理费"); Object returnVal = method.invoke(obj, args); return returnVal; } } //动态代理类 class MyProxy { public static Object getProxyInstance(Object obj, InvocationHandler handler) { return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj .getClass().getInterfaces(), handler); } } public class TestProxy { /** * @Title: main * @Description: * @param： * @return void * @user： wangzg * @Date：2014-10-27 * @throws */ public static void main(String[] args) { // TODO Auto-generated method stub //被代理类 MyObject myObject = new MyObject(); MyInvocationhandler myInvocationhandler = new MyInvocationhandler(); myInvocationhandler.setObject(myObject); Object myProxy = MyProxy.getProxyInstance(myObject, myInvocationhandler); MyInterface myInterface = (MyInterface)myProxy; myInterface.action(); NikeClothFactory nikeClothFactory = new NikeClothFactory(); myInvocationhandler.setObject(nikeClothFactory); Object myProxyNike = MyProxy.getProxyInstance(nikeClothFactory, myInvocationhandler); ClothFactory clothFactory = (ClothFactory)myProxyNike; clothFactory.productCloth(); } }