设计模式之代理设计

interface Network{//定义一个上网接口
    public void browse();
}
class Real implements Network{4
    public void browse(){
        System.out.println("用户浏览页面");
    }
}
class DaiLi implements Network{
    private Network network;
    public DaiLi(Network network){
        this.network = network;
    }
    public void yanZheng(){
        System.out.println("验证用户是否符合上网条件");
    }
    public void browse(){
        this.yanZheng();
        this.network.browse();
    }
}
public class User1{
    public static void main(String[] args){
        Network net = null;
        net = new DaiLi(new Real());
        net.browse();
    }
}