java+动态代理

package com.test;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.List;
import java.util.Vector;

public class VectorProxy implements InvocationHandler {
	private Object targetObj;
	
	public Object getTargetObj(){
		return targetObj;
	}
     public VectorProxy(Object targetObj){
    	 this.targetObj = targetObj;
     }
     public static Object factory(Object obj){
    	 Class clazz = obj.getClass();
    	 Object proxy = Proxy.newProxyInstance(clazz.getClassLoader(), clazz.getInterfaces(), new VectorProxy(obj));
    	 return proxy;
     }
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		// TODO Auto-generated method stub
		System.out.println("before invoke"+method.getName());
		if(null!=args){
			for(Object obj:args){
					System.out.println(obj+":ad");
			}
		}
		Object tarObj =((VectorProxy)((Proxy.getInvocationHandler(proxy)))).getTargetObj();
		System.out.println(tarObj==targetObj);
		 Object resultObj = method.invoke(targetObj, args);
		 System.out.println("after invoke");
		return resultObj;
	}
	
	@SuppressWarnings({ "unchecked",})
	public static void main(String[] args) {
		List v =null;
		v= (List)factory(new Vector(10));
		v.add("new");
		v.add("new5");
		System.out.println("aa");
	}

}