1. // 抽象同事类
    2. public class Colleague {
    4.     protected Mediator mediator;
    6.     public Colleague(Mediator mediator){
    7.         this.mediator=mediator;
    8.     }
    9. }
    10. // 具体同事1
    11. public class ConcreteColleague1 extends Colleague {
    13.     public ConcreteColleague1(Mediator mediator) {
    14.         super(mediator);
    15.         // TODO Auto-generated constructor stub
    16.     }
    18.     public void Send(String message){
    19. //    中介者发送消息
    20.         mediator.Send(message, this);
    21.     }
    23. //    给中介调用的，同事2来消息就通知同事1
    24.     public void Notify(String message){
    25.         System.out.println("同事1得到信息："+message);
    26.     }
    27. }
    28. // 具体同事2
    29. public class ConcreteColleague2 extends Colleague {
    31.     public ConcreteColleague2(Mediator mediator) {
    32.         super(mediator);
    33.         // TODO Auto-generated constructor stub
    34.     }
    36.     public void Send(String message){
    37. //    中介者发送消息
    38.         mediator.Send(message, this);
    39.     }
    41. //    给中介调用的，同事1来消息就通知同事2
    42.     public  void Notify(String message){
    43.         System.out.println("同事2得到信息："+message);
    44.     }
    45. }
    46. // 抽象中介者类
    47. public abstract class Mediator {
    49.     public abstract void Send(String message,Colleague colleague);
    50. }
    51. // 具体中介者
    52. public class ConcreteMediator extends Mediator{
    53.     // 同事1
    54.     private ConcreteColleague1 colleague1;
    55.     // 同事2
    56.     private ConcreteColleague2 colleague2;
    58.     public void setColleague1(ConcreteColleague1 colleague1) {
    59.         this.colleague1 = colleague1;
    60.     }
    62.     public void setColleague2(ConcreteColleague2 colleague2) {
    63.         this.colleague2 = colleague2;
    64.     }
    66.     @Override
    67.     public void Send(String message, Colleague colleague) {
    68. //        根据对象做出选择判断，通知对象
    69.         if(colleague == colleague1){
    70.             colleague2.Notify(message);
    71.         }else{
    72.             colleague1.Notify(message);
    74.         }
    75.     }
    76. }
    77. public class Test {
    79.     public static void main(String[] args) {
    80.         // 中介者
    81.         ConcreteMediator mediator =new ConcreteMediator();
    82.         // 同事1 同事2
    83.         ConcreteColleague1 c1 = new ConcreteColleague1(mediator);
    84.         ConcreteColleague2 c2 = new ConcreteColleague2(mediator);
    86.         mediator.setColleague1(c1);
    87.         mediator.setColleague2(c2);
    89.         // 通过中介者发送消息
    90.         c1.Send("吃过饭了吗？");
    91.         c2.Send("没有呢，你打算请客?");    
    93.     }
    94. }