设计模式之中介者模式

mediator

结构图

实现代码

//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
}
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 outAction() {
        System.out.println("汇报工作！没钱了，需要资金支持！");
    }

    @Override
    public void selfAction() {
        System.out.println("专心科研，开发项目！");
    }

}
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 outAction() {
        System.out.println("汇报工作！没钱了，钱太多了！怎么花?");
    }

    @Override
    public void selfAction() {
        System.out.println("数钱！");
    }

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

        m.command("finacial");

    }

    @Override
    public void selfAction() {
        System.out.println("跑去接项目！");
    }

}
//中介者
public interface Mediator {

    void register(String dname,Department d);

    void command(String dname);

}
//实现中介者接口的经理类
public class President implements Mediator {

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

    @Override
    public void command(String dname) {
        map.get(dname).selfAction();
    }

    @Override
    public void register(String dname, Department d) {
        map.put(dname, d);
    }

}

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();

    }
}