设计模式之中介者模式

package com.zcr.Mediator;
//抽象同事类
public abstract class Colleague
{
 protected Mediator mediator;
 
 //构造方法，得到中介者对象
 public Colleague(Mediator mediator)
 {
  this.mediator = mediator;
 }
}

package com.zcr.Mediator;
public class ConcreteColleague1 extends Colleague
{
 public ConcreteColleague1(Mediator mediator)
 {
  super(mediator);
 
 }
 public void Send(String message)
 {
  mediator.Send(message, this);
 }
 
 public void Notify(String message)
 {
  System.out.println("同事1得到消息："+message);
 }
}

package com.zcr.Mediator;
public class ConcreteColleague2 extends Colleague
{
 public ConcreteColleague2(Mediator mediator)
 {
  super(mediator);
  // TODO Auto-generated constructor stub
 }
 
 public void Send(String message)
 {
  mediator.Send(message, this);
 }
 
 public void Notify(String message)
 {
  System.out.println("同事2得到消息："+message);
 }
}

package com.zcr.Mediator;
public class ConcreteMediator extends Mediator
{
 private ConcreteColleague1 colleague1;
 private ConcreteColleague2 colleague2;
 
 
 
 public ConcreteColleague1 getColleague1()
 {
  return colleague1;
 }
 public void setColleague1(ConcreteColleague1 colleague1)
 {
  this.colleague1 = colleague1;
 }
 public ConcreteColleague2 getColleague2()
 {
  return colleague2;
 }
 public void setColleague2(ConcreteColleague2 colleague2)
 {
  this.colleague2 = colleague2;
 }
 @Override
 public void Send(String message, Colleague colleague)
 {
  if(colleague == colleague1)
  {
   colleague2.Notify(message);
  }
  else
  {
   colleague1.Notify(message);
  }
 
 }
}

package com.zcr.Mediator;
//抽象中介者类
public abstract class Mediator
{
 //定义一个抽象的发送消息的方法，得到同时对象和发送消息
 public abstract void Send(String message,Colleague colleague);
 
}

package com.zcr.Mediator;
public class MediatorTest
{
 public static void main(String[] args)
 {
  ConcreteMediator m = new ConcreteMediator();
 
  //让两个具体同时类认识中介者对象
  ConcreteColleague1 c1 = new ConcreteColleague1(m);
  ConcreteColleague2 c2 = new ConcreteColleague2(m);
 
  //让中介者认识各个具体同时类对象
  m.setColleague1(c1);
  m.setColleague2(c2);
 
  //具体同时类对象的发送信息都是通过中介者发送的
  c1.Send("吃过饭了吗？");
  c2.Send("没有呢，打算请客？");
 
 }
}