《软件设计模式》课程实验报告-实验12-观察者模式-学号姓名-副本

1、幼而福州理工学浣FUZHOU INSTITUTE OF TECHNOLOGY课程名称专业班级姓名学号指导老师日期福州理工学院工学院二。一七年三月实验12 观察者模式的应用、实验目的1 .理解观察者模式的定义2 .掌握观察者模式的结构类图和典型代码、实验准备与环境1.实验准备观察者模式类图Sufcjecl+ update i;abs updtef):+ attach (Observer ote)+ detacti (Observer cbs) 4. notify 0fcr(ob5-Ot»sarrersiObserverConcrete Subject-subjectStete :+ g

2、diState (+ setstate。-$ub)eeiGgrreteOtxrver cbsen/er State :return 莒ubjmHS怕怕obs e n erState=$ubjec t.getsiatej;2.实验环境StarUML (或 Visio)+Eclipse三、实验要求某在线游戏支持多人联机对战，每个玩家都可以加入某一战队组成联盟，当战队中某一成员受到敌人攻击时将给所有盟友发送通知，盟友收到通知后将作出响应。使用观察者模式设计并实现该过程。绘制类图并编程实现。四、实验步骤package com.test.observer;观察者接口，由观察者来实现public inte

3、rface Observer public String getName();public void setName(String name);public void help();声明支援方法public void beAttacked(Subject sub); 声明遭受攻击方式package com.test.observer;public interface Subject public void join(Observer o);public void quit(Observer o);public void notifyObservers(String name);package

4、com.test.observer;import java.util.ArrayList;public class ConcreteSubject implements Subject private String teamName ;战队名称 private ArrayList<Observer> observers，观察者集合/创建战队public ConcreteSubject(String teamName) System.out.println(teamName+ "战队组建成功！")； System.out.println( "="

5、;);observers =new ArrayList<Observer>();this .teamName =teamName;public String getTeamName() return teamName ;public void setTeamName(String teamName) this .teamName = teamName;添加队友Overridepublic void join(Observer o) System.out.println(o.getName()+ "加入"+this .teamName +"战队!&quo

6、t;); observers .add(o);注销观察者Overridepublic void quit(Observer o) System.out.println(o.getName()+ "退出"+this .teamName +"战队!"); observers .remove(o);Overridepublic void notifyObservers(String name) );System.err.println( this .teamName +"战队消息：队友"+name+"正在求救!for (Objec

7、t obs:observers) if(!(Observer)obs).getName().equalsIgnoreCase(name) (Observer)obs).help();package com.kuang.observer.improve;import com.kuang.observer.CurrentConditions;import java.util.ArrayList;public class WeatherData implements Subject温度气压湿度privatefloattemperature;privatefloatpressure;privatefl

8、oathumidity ;观察者集合private ArrayList<Observer> observers;public WeatherData() observers =new ArrayList<Observer>();public float getTemperature() return temperature ;public float getPressure() return pressure ;public float getHumidity() return humidity ;public void dataChange() notifyObser

9、vers();当数据有更新时，就调用setDatapublic void setDatafloat temperature, float pressure, float humidity) this .temperature = temperature;this .pressure = pressure;this .humidity = humidity; dataChange();注册一个观察者Overridepublic void registerObserver(Observer o) observers .add(o);移除一个观察者Overridepublic void remove

10、Observer(Observer o) if (observers .contains(o) observers .remove(o);public class Client 遍历所有的观察者，并Overridepublic void notifyObservers() for (int i = 0; i < observers .size(); i+) observers .get(i).update(this.temperature ,this .pressure ,this .humidity );package com.test.observer;public class Pl

11、ayer implements Observer private String name;public Player(String name) this .name=name;Overridepublic String getName() return this .name;Overridepublic void setName(String name) this .name=name;Overridepublic void help() System.out.println( this .name + "正在路上，猥琐发育 ")； Overridepublic void

12、beAttacked(Subject sub) System.out.println( this .name + "救救我！");sub.notifyObservers( name);package com.test.observer;public static void main(String口 args) / TODO Auto-generated method stub定义观察目标对象Subject s1;s1=new ConcreteSubject("GPL");定义5英雄Observer player1,player2,player3,play

13、er4,player5;player1 = new Player("亚瑟");s1.join(player1);player2= new Player("盘古");s1.join(player2);player3= new Player("后羿");s1.join(player3);player4= new Player("王昭君");s1.join(player4);player5= new Player("百里玄策");s1.join(player5);player1.beAttacked(s1);五、讨论与分析观察者模式的主要的作用就是