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中介者模式
中介者模式(Mediator),用一个中介对象来封装一系列的对象交互。中介对象使各对象不需要显式地相互引用,从而使其耦合松散,而且可以独立地改变它们之间的交互。
Mediator类
package mediator; /** * 抽象中介者类 * 原来是同事A、B、C、D之间直接发送消息的 * 现在模式是:同事A、B、C、D不直接交互,而是通过中介者来传递消息 * 所以抽象中介者要在方法中表明是谁发出消息,由谁来接受消息 * @author 煞笔 * */ public abstract class Mediator { //方法中指出那个同事是发出消息的,那位同事来接受消息 public abstract void send(String message, Colleague send_colleague,Colleague accept_colleague); }
ConcreteMediator类
package mediator; /** * 具体中介者类 * 中介者要在方法中表明是谁发出消息,由谁来接受消息 * @author 煞笔 * */ public class ConcreteMediator extends Mediator { @Override public void send(String message, Colleague send_colleague,Colleague accept_colleague) { //接受者收到发送者发出的消息 accept_colleague.accept(message,send_colleague); } }
Colleague类
package mediator; /** * 抽象同事类 * 同事A、B、C、D不直接交互,而是通过中介者来传递消息 * 要达到这种效果,同事们都需要认识中介者 * 每位同事都具有发出消息,接收消息的功能 * @author 煞笔 * */ public abstract class Colleague { protected Mediator mediator;//认识中介者 private String name; public Colleague(Mediator mediator,String name) { this.mediator = mediator; this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } /** * 发送消息给接受同事 * @param message * @param colleague */ public abstract void send(String message,Colleague accept_colleague); /** * 从发出消息的同事那里接收到消息 * @param message * @param from_colleague */ public abstract void accept(String message,Colleague send_colleague); }
ConcreateColleagueA类
package mediator; public class ConcreateColleagueA extends Colleague { public ConcreateColleagueA(Mediator mediator, String name) { super(mediator, name); } @Override public void send(String message,Colleague accept_colleague) { System.out.println(message); mediator.send(message, this,accept_colleague); } @Override public void accept(String message,Colleague send_colleague) { System.out.println("接受者A收到信息了,消息来自"+send_colleague.getName()); } }
ConcreateColleagueB类
package mediator; public class ConcreateColleagueB extends Colleague { public ConcreateColleagueB(Mediator mediator, String name) { super(mediator, name); } @Override public void send(String message,Colleague accept_colleague) { System.out.println(message); mediator.send(message, this,accept_colleague); } @Override public void accept(String message,Colleague send_colleague) { System.out.println("接受者B收到信息了,消息来自"+send_colleague.getName()); } }
ConcreateColleagueC类
package mediator; public class ConcreateColleagueC extends Colleague { public ConcreateColleagueC(Mediator mediator, String name) { super(mediator, name); } @Override public void send(String message,Colleague accept_colleague) { System.out.println(message); mediator.send(message, this,accept_colleague); } @Override public void accept(String message,Colleague send_colleague) { System.out.println("接受者C收到信息了,消息来自"+send_colleague.getName()); } }
ConcreateColleagueD类
package mediator; public class ConcreateColleagueD extends Colleague { public ConcreateColleagueD(Mediator mediator, String name) { super(mediator, name); } @Override public void send(String message,Colleague accept_colleague) { System.out.println(message); mediator.send(message, this,accept_colleague); } @Override public void accept(String message,Colleague send_colleague) { System.out.println("接受者D收到信息了,消息来自"+send_colleague.getName()); } }
Business类
package mediator; public class Business { public static void main(String[] args) { ConcreteMediator mediator = new ConcreteMediator(); Colleague colleagueA = new ConcreateColleagueA(mediator,"A"); Colleague colleagueB = new ConcreateColleagueB(mediator,"B"); Colleague colleagueC = new ConcreateColleagueC(mediator,"C"); Colleague colleagueD = new ConcreateColleagueD(mediator,"D"); colleagueA.send("我是A,讲个美人鱼故事,B接受的到了吗",colleagueB); System.out.println("---------1个发送接受过程结束--------------"); colleagueB.send("我是B,早上路上较堵,注意安全,A接受的到了吗",colleagueA); System.out.println("---------2个发送接受过程结束--------------"); colleagueC.send("我是C,我有话对说,B接受的到了吗",colleagueB); System.out.println("---------3个发送接受过程结束--------------"); colleagueD.send("我是D,周末出去玩吗,A接受的到了吗",colleagueA); System.out.println("---------4个发送接受过程结束--------------"); colleagueA.send("我是A,讲个美人鱼故事,C接受的到了吗",colleagueC); System.out.println("---------5个发送接受过程结束--------------"); colleagueB.send("我是B,早上路上较堵,注意安全,D接受的到了吗",colleagueD); System.out.println("---------6个发送接受过程结束,后面还有很多组合,4个人,随意其中2个人都可以交互--------------"); } }
中介者模式
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