设计模式--结构型模式--装饰模式

  1 //定义被装饰者  
  2 public interface Human {  
  3     public void wearClothes();  
  4   
  5     public void walkToWhere();  
  6 }  
  7   
  8 //定义装饰者  
  9 public abstract class Decorator implements Human {  
 10     private Human human;  
 11   
 12     public Decorator(Human human) {  
 13         this.human = human;  
 14     }  
 15   
 16     public void wearClothes() {  
 17         human.wearClothes();  
 18     }  
 19   
 20     public void walkToWhere() {  
 21         human.walkToWhere();  
 22     }  
 23 }  
 24   
 25 //下面定义三种装饰，这是第一个，第二个第三个功能依次细化，即装饰者的功能越来越多  
 26 public class Decorator_zero extends Decorator {  
 27   
 28     public Decorator_zero(Human human) {  
 29         super(human);  
 30     }  
 31   
 32     public void goHome() {  
 33         System.out.println("进房子。。");  
 34     }  
 35   
 36     public void findMap() {  
 37         System.out.println("书房找找Map。。");  
 38     }  
 39   
 40     @Override  
 41     public void wearClothes() {  
 42         // TODO Auto-generated method stub  
 43         super.wearClothes();  
 44         goHome();  
 45     }  
 46   
 47     @Override  
 48     public void walkToWhere() {  
 49         // TODO Auto-generated method stub  
 50         super.walkToWhere();  
 51         findMap();  
 52     }  
 53 }  
 54   
 55 public class Decorator_first extends Decorator {  
 56   
 57     public Decorator_first(Human human) {  
 58         super(human);  
 59     }  
 60   
 61     public void goClothespress() {  
 62         System.out.println("去衣柜找找看。。");  
 63     }  
 64   
 65     public void findPlaceOnMap() {  
 66         System.out.println("在Map上找找。。");  
 67     }  
 68   
 69     @Override  
 70     public void wearClothes() {  
 71         // TODO Auto-generated method stub  
 72         super.wearClothes();  
 73         goClothespress();  
 74     }  
 75   
 76     @Override  
 77     public void walkToWhere() {  
 78         // TODO Auto-generated method stub  
 79         super.walkToWhere();  
 80         findPlaceOnMap();  
 81     }  
 82 }  
 83   
 84 public class Decorator_two extends Decorator {  
 85   
 86     public Decorator_two(Human human) {  
 87         super(human);  
 88     }  
 89   
 90     public void findClothes() {  
 91         System.out.println("找到一件D&G。。");  
 92     }  
 93   
 94     public void findTheTarget() {  
 95         System.out.println("在Map上找到神秘花园和城堡。。");  
 96     }  
 97   
 98     @Override  
 99     public void wearClothes() {  
100         // TODO Auto-generated method stub  
101         super.wearClothes();  
102         findClothes();  
103     }  
104   
105     @Override  
106     public void walkToWhere() {  
107         // TODO Auto-generated method stub  
108         super.walkToWhere();  
109         findTheTarget();  
110     }  
111 }  
112   
113 //定义被装饰者，被装饰者初始状态有些自己的装饰  
114 public class Person implements Human {  
115   
116     @Override  
117     public void wearClothes() {  
118         // TODO Auto-generated method stub  
119         System.out.println("穿什么呢。。");  
120     }  
121   
122     @Override  
123     public void walkToWhere() {  
124         // TODO Auto-generated method stub  
125         System.out.println("去哪里呢。。");  
126     }  
127 }  
128 //测试类，看一下你就会发现，跟java的I/O操作有多么相似  
129 public class Test {  
130     public static void main(String[] args) {  
131         Human person = new Person();  
132         Decorator decorator = new Decorator_two(new Decorator_first(  
133                 new Decorator_zero(person)));  
134         decorator.wearClothes();  
135         decorator.walkToWhere();  
136     }  
137 }