静态代理与动态代理

package com.example.demo02.proxy;

import com.sun.org.apache.bcel.internal.generic.NEW;

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

interface House {
    void buyHouse();
}

class Joee implements House {

    @Override
    public void buyHouse() {
        System.out.println("我是joee，我买房子啦！");
    }
}

//  静态代理，代理不同的对象要不同的代理类
class StaticProxy implements House {

    private Joee joee;

    public StaticProxy(Joee joee) {
        this.joee = joee;
    }

    @Override
    public void buyHouse() {
        System.out.println("开始代理joee买房子！");
        joee.buyHouse();
        System.out.println("结束代理joee买房子！");
    }
}

//  动态代理  不需要生成代理类
class JDKDynamicProxy implements InvocationHandler {

    //  被代理对象
    private Object target;

    public JDKDynamicProxy(Object target) {
        this.target = target;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        System.out.println("我是房产中介.....开始监听你买房啦!");
        Object object = method.invoke(target, args);
        System.out.println("我是房产中介.....结束监听你买房啦!");
        return object;
    }
}


public class MyProxy {
    public static void main(String[] args) {
        Joee joee = new Joee();
        
        // 静态代理
        new StaticProxy(joee).buyHouse();
        System.out.println("---------------------");

        // 动态代理
        House proxyInstance = (House) Proxy.newProxyInstance(joee.getClass().getClassLoader(), joee.getClass().getInterfaces(), new JDKDynamicProxy(joee));
        proxyInstance.buyHouse();

    }
}