【GOF23设计模式】中介者模式

来源：http://www.bjsxt.com/ 
一、【GOF23设计模式】_中介者模式、同事协作类、内部类实现

 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！