java中23种设计模式之19-中介者模式（mediator pattern）

最新推荐文章于 2025-08-08 21:00:55 发布

转载最新推荐文章于 2025-08-08 21:00:55 发布 · 75 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/wudymand/p/4390529.html

文章标签：

#设计模式 #java

本文通过定义一个中介者对象来封装一系列对象之间的交互，同事类相互之间不再显式地互相引用，而是通过中介者来进行相互之间的间接通信，降低系统的耦合度。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

abstract class AbstractColleague
{
public abstract void workSelf();
public abstract void requestOthersHelp();
}

class ColleagueA extends AbstractColleague
{
Mediator aMediator=new Mediator();
public void workSelf()
{
System.out.println("ColleagueA-->work");
}
public void requestOthersHelp()
{
System.out.println("ColleagueA-->request ColleagueB help");
aMediator.doRequest(this);
}
}

class ColleagueB extends AbstractColleague
{
Mediator aMediator=new Mediator();
public void workSelf()
{
System.out.println("ColleagueB-->work");
}
public void requestOthersHelp()
{
System.out.println("ColleagueB-->request ColleagueA help");
aMediator.doRequest(this);
}
}

class Mediator
{
AbstractColleague aAbstractColleague=null;
public void doRequest(AbstractColleague abstractColleague)
{
if(abstractColleague.getClass().equals(ColleagueA.class))
{
aAbstractColleague=new ColleagueB();
aAbstractColleague.workSelf();
}
else
{
aAbstractColleague=new ColleagueA();
aAbstractColleague.workSelf();
}
}

}

public class MediatorPatternTest
{
public static void main(String[] args)
{
AbstractColleague aColleagueA=new ColleagueA();
AbstractColleague aColleagueB=new ColleagueB();
//Mediator aMediator-new Mediator();

aColleagueA.workSelf();
aColleagueA.requestOthersHelp();
System.out.println("work done");

aColleagueB.workSelf();
aColleagueB.requestOthersHelp();
System.out.println("work done");
}

}