//定义被装饰者 
 public interface Human { 
  public void wearClothes(); 
  public void walkToWhere(); 
 } 
 //定义装饰者 
 public abstract class Decorator implements Human { 
  private Human human; 
  public Decorator(Human human) { 
   this.human = human; 
  } 
  public void wearClothes() { 
   human.wearClothes(); 
  } 
  public void walkToWhere() { 
   human.walkToWhere(); 
  } 
 } 
 //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 
 public class Decorator_zero extends Decorator { 
  public Decorator_zero(Human human) { 
   super(human); 
  } 
  public void goHome() { 
   System.out.println("进房子。。"); 
  } 
  public void findMap() { 
   System.out.println("书房找找Map。。"); 
  } 
  @Override 
  public void wearClothes() { 
   // TODO Auto-generated method stub 
   super.wearClothes(); 
   goHome(); 
  } 
   @Override 
  public void walkToWhere() { 
   // TODO Auto-generated method stub 
   super.walkToWhere(); 
   findMap(); 
  } 
 } 
 public class Decorator_first extends Decorator { 
  public Decorator_first(Human human) { 
   super(human); 
  } 
  public void goClothespress() { 
   System.out.println("去衣柜找找看。。"); 
  } 
  public void findPlaceOnMap() { 
   System.out.println("在Map上找找。。"); 
  } 
  @Override 
  public void wearClothes() { 
   // TODO Auto-generated method stub 
   super.wearClothes(); 
   goClothespress(); 
     } 
  @Override 
  public void walkToWhere() { 
   // TODO Auto-generated method stub 
   super.walkToWhere(); 
   findPlaceOnMap(); 
  } 
 } 
 public class Decorator_two extends Decorator { 
  public Decorator_two(Human human) { 
   super(human); 
  } 
  public void findClothes() { 
   System.out.println("找到一件D&G。。"); 
  } 
  public void findTheTarget() { 
   System.out.println("在Map上找到神秘花园和城堡。。"); 
  } 
  @Override 
  public void wearClothes() { 
   // TODO Auto-generated method stub 
   super.wearClothes(); 
   findClothes(); 
  } 
  @Override 
  public void walkToWhere() { 
   // TODO Auto-generated method stub 
   super.walkToWhere(); 
   findTheTarget(); 
  } 
 } 
 //定义被装饰者，被装饰者初始状态有些自己的装饰 
 public class Person implements Human {  
  @Override 
  public void wearClothes() { 
   // TODO Auto-generated method stub 
   System.out.println("穿什么呢。。"); 
  } 
  @Override 
  public void walkToWhere() { 
   // TODO Auto-generated method stub 
   System.out.println("去哪里呢。。"); 
  } 
 } 
 //测试类，看一下你就会发现，跟java的I/O操作有多么相似 
 public class Test { 
  public static void main(String[] args) { 
   Human person = new Person(); 
   Decorator decorator = new Decorator_two(new Decorator_first( 
     new Decorator_zero(person))); 
   decorator.wearClothes(); 
   decorator.walkToWhere(); 
  } 
 }

package decorator;   
 public abstract class Humburger {    
  protected String name ;    
  public String getName(){ 
   return name; 
  }    
  public abstract double getPrice(); 
 } 

 package decorator;   
 public class ChickenBurger extends Humburger {    
  public ChickenBurger(){ 
   name = "鸡腿堡"; 
  }   
  @Override 
  public double getPrice() { 
   return 10; 
  } 
 } 

package decorator; 
 public abstract class Condiment extends Humburger { 
  public abstract String getName(); 
 } 

package decorator;   
 public class Lettuce extends Condiment {    
  Humburger humburger;    
  public Lettuce(Humburger humburger){ 
   this.humburger = humburger; 
  }   
  @Override 
  public String getName() { 
   return humburger.getName()+" 加生菜"; 
  }   
  @Override 
  public double getPrice() { 
   return humburger.getPrice()+1.5; 
  }  
 } 

package decorator; 
 public class Chilli extends Condiment { 
   
  Humburger humburger;    
  public Chilli(Humburger humburger){ 
   this.humburger = humburger;     
  }  
  @Override 
  public String getName() { 
   return humburger.getName()+" 加辣椒"; 
  }   
  @Override 
  public double getPrice() { 
   return humburger.getPrice(); //辣椒是免费的哦 
  } 
 } 

package decorator; 
 public class Test { 
  /** 
  * @param args 
  */ 
  public static void main(String[] args) { 
   Humburger humburger = new ChickenBurger(); 
   System.out.println(humburger.getName()+" 价钱："+humburger.getPrice()); 
   Lettuce lettuce = new Lettuce(humburger); 
   System.out.println(lettuce.getName()+" 价钱："+lettuce.getPrice()); 
   Chilli chilli = new Chilli(humburger); 
   System.out.println(chilli.getName()+" 价钱："+chilli.getPrice()); 
   Chilli chilli2 = new Chilli(lettuce); 
   System.out.println(chilli2.getName()+" 价钱："+chilli2.getPrice()); 
  } 
 }