(转载)Java之外观模式（Facade Pattern）

 1 package facade;  
 2 class DrawerOne {  
 3     public void open(){  
 4        System.out.println("第一个抽屉被打开了");  
 5        getKey();  
 6     }  
 7     public void getKey(){  
 8        System.out.println("得到第二个抽屉的钥匙");  
 9     }  
10 }  
11 class DrawerTwo{  
12     public void open(){  
13        System.out.println("第二个抽屉被打开了");  
14        getFile();  
15     }  
16     public void getFile(){  
17        System.out.println("得到这个重要文件");  
18     }  
19 }  
20 class DrawerFacade{  
21     DrawerOne darwerOne=new DrawerOne();  
22     DrawerTwo darwerTwo=new DrawerTwo();  
23     public void open(){  
24        darwerOne.open();  
25        darwerTwo.open();  
26     }  
27 }  
28 public class DrawerClient{  
29     public static void main(String []args){  
30        DrawerFacade drawer=new DrawerFacade();  
31        drawer.open();  
32     }  
33 }