jdk自带的动态代理

package com.stone.dp.proxy;

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

/**
* jdk自带的动态代理；必须实现了某个接口；<br>
*/
public class JdkProxy implements InvocationHandler {

private Object obj;

public JdkProxy(Object obj) {
this.obj = obj;
}

@Override
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
System.out.println("before...");
Object invoke = method.invoke(obj, args);
System.out.println("after...");
return invoke;
}

/**
* @param args
*/
public static void main(String[] args) {
Car car = new Car();
InvocationHandler h = new JdkProxy(car);
Movable m = (Movable) Proxy.newProxyInstance(car.getClass()
.getClassLoader(), car.getClass().getInterfaces(), h);
m.move();
}
}

/**
* 实现的接口；
*/
interface Movable {
public void move();
}

/**
* 被代理的类；
*/
class Car implements Movable {

@Override
public void move() {
System.out.println("car is moving...");
}

}