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