package com.test.mediator;

 /**

  * 同事类的接口

  */

 public interface Department {

     void selfAction();//做本部门的事情

     void outAction();//向总经理发出申请

 }

 package com.test.mediator;

 public class Development implements Department{

     private Mediator m;//持有中介者(总经理)的引用

     public Development(Mediator m) {

         super();

         this.m = m;

         m.register("development", this);

     }

     @Override

     public void selfAction() {

         System.out.println(getClass().getName()+"专心科研，开发项目！");

     }

     @Override

     public void outAction() {

         System.out.println(getClass().getName()+"汇报工作！没钱了，需要资金支持！");

     }

 }

 package com.test.mediator;

 public class Finacial implements Department{

     private Mediator m;//持有中介者(总经理)的引用

     public Finacial(Mediator m) {

         super();

         this.m = m;

         m.register("finacial", this);

     }

     @Override

     public void selfAction() {

         System.out.println(getClass().getName()+"数钱！");

     }

     @Override

     public void outAction() {

         System.out.println(getClass().getName()+"汇报工作！没钱了，钱太多了！怎么花？");

     }

 }

 package com.test.mediator;

 public class Market implements Department{

     private Mediator m;//持有中介者(总经理)的引用

     public Market(Mediator m) {

         super();

         this.m = m;

         m.register("market", this);

     }

     @Override

     public void selfAction() {

         System.out.println(getClass().getName()+"跑去接项目！");

     }

     @Override

     public void outAction() {

         System.out.println(getClass().getName()+"汇报工作！项目承接的进度，需要资金支持！");

         m.command("finacial");

     }

 }

 package com.test.mediator;

 public interface Mediator {

     void register(String dname,Department d);

     void command(String dname);

 }

 package com.test.mediator;

 import java.util.HashMap;

 import java.util.Map;

 public class President implements Mediator{

     private Map<String, Department> map = new HashMap<String, Department>();

     @Override

     public void register(String dname, Department d) {

         map.put(dname, d);

     }

     @Override

     public void command(String dname) {

         map.get(dname).selfAction();

     }

 }

 package com.test.mediator;

 public class Client {

     public static void main(String[] args) {

         Mediator m = new President();

         Market market = new Market(m);

         Development devp = new Development(m);

         Finacial f = new Finacial(m);

         market.selfAction();

         market.outAction();

     }

 }

控制台输出：

com.test.mediator.Market跑去接项目！

com.test.mediator.Market汇报工作！项目承接的进度，需要资金支持！

com.test.mediator.Finacial数钱！