我看懂的设计模式 Proxy，代理模式

Proxy，代理模式：为其他对象提供一种代理以控制对这个对象的访问





package com.cbf4life.proxy;

/**

*

* 定义一种类型的女人，王婆和潘金莲都属于这个类型的女人

*/

public interface KindWomen {

public void makeEyesWithMan();

}

package com.cbf4life.proxy;

public class PanJinLian implements KindWomen {

public void makeEyesWithMan() {

System.out.println("潘金莲抛媚眼");

}

}

package com.cbf4life.proxy;

public class WangPo implements KindWomen {

private KindWomen kindWomen;

public WangPo(){ //默认的话，是潘金莲的代理

this.kindWomen = new PanJinLian();

}

//她可以是KindWomen的任何一个女人的代理

public WangPo(KindWomen kindWomen){

this.kindWomen = kindWomen;

}

public void makeEyesWithMan() {

this.kindWomen.makeEyesWithMan(); //王婆这么大年龄了，谁看她抛媚眼？！

}

}



package com.cbf4life.proxy;

public class XiMenQing {

public static void main(String[] args) {

//把王婆叫出来

WangPo wangPo = new WangPo();

wangPo.makeEyesWithMan(); //看到没，虽然表面上时王婆在做，实际上是潘金莲

}

}







package com.cbf4life.proxy;

public class JiaShi implements KindWomen {

public void makeEyesWithMan() {

System.out.println("贾氏抛媚眼");

}

}

package com.cbf4life.proxy;

public class XiMenQing {

public static void main(String[] args) {

//改编一下历史，贾氏被西门庆勾走：

JiaShi jiaShi = new JiaShi();

WangPo wangPo = new WangPo(jiaShi); //让王婆作为贾氏的代理人

wangPo.makeEyesWithMan();

}

}