【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！