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...");
    }

}