适配器模式

 1 package com.learning.designpattern.adapter;
 2 
 3 public class Target {
 4     
 5     public void operation(){
 6         System.out.println("target operation");
 7     }
 8     
 9 
10 }

1 package com.learning.designpattern.adapter;
2 
3 public class Adaptee {
4 
5     public void request(){
6         System.out.println("real request");
7     }
8 }

 1 package com.learning.designpattern.adapter;
 2 
 3 public class Adapter extends Target {
 4     
 5     private Adaptee adaptee;
 6     
 7     @Override
 8     public void operation() {
 9         if(adaptee==null){
10             adaptee = new Adaptee();
11         }
12         adaptee.request();
13 
14     }
15 
16 
17 }

 1 package com.learning.designpattern.adapter;
 2 
 3 public class Client {
 4 
 5     /**
 6      * @param args
 7      */
 8     public static void main(String[] args) {
 9         Target target = new Adapter();
10         target.operation();
11 
12     }
13 
14 }