代理模式

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

public class ProxyTest {       public static void main(String[] args) {         Server server = new Server();         ProxyServer proxyServer = new ProxyServer(server);         proxyServer.browse();     }   }   interface NetWork{     void browse(); }   //被代理类 class Server implements NetWork{       @Override     public void browse() {         System.out.println("我是真实服务器去访问网络。");     } } //代理类 class ProxyServer implements NetWork{       private NetWork netWork;       public ProxyServer(NetWork netWork){         this.netWork = netWork;     }       public void check(){         System.out.println("访问前检查一下网络");     }       @Override     public void browse() {         check();         netWork.browse();     } }