java学习笔记-设计模式23(中介者模式)

意图

　　用一个中介对象来封装一系列的对象交互。中介者使各对象不需要显式地相互引用，从而使其耦合松散，而且可以独立地改变它们之间的交互。

 

public interface Mediator {  
    public void createMediator();  
    public void workAll();  
}

　　

public class MyMediator implements Mediator {  
  
    private User user1;  
    private User user2;  
      
    public User getUser1() {  
        return user1;  
    }  
  
    public User getUser2() {  
        return user2;  
    }  
  
    @Override  
    public void createMediator() {  
        user1 = new User1(this);  
        user2 = new User2(this);  
    }  
  
    @Override  
    public void workAll() {  
        user1.work();  
        user2.work();  
    }  
} 

　　

public abstract class User {  
      
    private Mediator mediator;  
      
    public Mediator getMediator(){  
        return mediator;  
    }  
      
    public User(Mediator mediator) {  
        this.mediator = mediator;  
    }  
  
    public abstract void work();  
}  

　　

public class User1 extends User {  
  
    public User1(Mediator mediator){  
        super(mediator);  
    }  
      
    @Override  
    public void work() {  
        System.out.println("user1 exe!");  
    }  
} 

　　

public class User2 extends User {  
  
    public User2(Mediator mediator){  
        super(mediator);  
    }  
      
    @Override  
    public void work() {  
        System.out.println("user2 exe!");  
    }  
}  

　　

public class Test {  
  
    public static void main(String[] args) {  
        Mediator mediator = new MyMediator();  
        mediator.createMediator();  
        mediator.workAll();  
    }  
}  

　　

　　转自：http://blog.csdn.net/zhangerqing/article/details/8245537