一、题目:
在战斗中,一般根据战争规模的大小和重要性,由不同级别的长官(officer)来下达作战指令,情报人员向上级提交军情(包括敌人人数等信息),作战命令需要上级批准,如果直接上级不具备下达命令的权力,则传递给他的上级,直到有人可以决定为止。现使用职责链模式来模拟该过程,客户类模拟情报人员,首先向级别最低的班长(Bangzhang),提交任务书(Mission),即军情,如果超出班长的权限范围,则传递给排长(Paizhang),排长如果不能处理,则传递给营长(Yingzhang),如果营长不能处理,则需要开会讨论,设置着几级长官的权限范围分别是:
1>. 敌人数量小<10人,班长下达作战指令
2>. 10=<敌人数量<50,排长下达作战指令
3>. 50=<敌人数量<200,营长下达作战指令
4>. 200=<敌人数量,需要开会讨论
(1)绘制职责链模式结构视图;
(2)请绘制该实例类图,并代码实现。
二、所用模式结构视图:
三、实例类图:
四、实例实现代码:
(因为区分,所以在类的前面加了Gj19)
抽象处理者
package gjChainofResponsibilityPattern;
/**
* 抽象处理者
* @author gong
*
*/
public abstract class Gj19Officer {
protected String name;
protected Gj19Officer gj19successor;
public Gj19Officer(String name)
{
this.name=name;
}
public void setgj19Successor(Gj19Officer gj19successor)
{
this.gj19successor=gj19successor;
}
public abstract void handleMission(Gj19Mission mission);
}
军情信息
package gjChainofResponsibilityPattern;
/**
* 军情信息
* @author gong
*
*/
public class Gj19Mission {
private String soldierName; //情报人员名称
private int enemyNumber; //敌人数量
public Gj19Mission() {
super();
}
public Gj19Mission(String soldierName, int enemyNumber) {
super();
this.soldierName = soldierName;
this.enemyNumber = enemyNumber;
}
public String getSoldierName() {
return soldierName;
}
public void setSoldierName(String soldierName) {
this.soldierName = soldierName;
}
public int getEnemyNumber() {
return enemyNumber;
}
public void setEnemyNumber(int enemyNumber) {
this.enemyNumber = enemyNumber;
}
}
具体处理者–班长
package gjChainofResponsibilityPattern;
/**
* 具体处理者--班长
* @author gong
*
*/
public class Gj19Bangzhang extends Gj19Officer{
public Gj19Bangzhang(String name) {
super(name);
}
@Override
public void handleMission(Gj19Mission mission) {
if(mission.getEnemyNumber()>0 && mission.getEnemyNumber()<10){
System.out.println("班长"+name+"接到"+mission.getSoldierName()+"的军情"+",敌人数量为"+mission.getEnemyNumber()+",可以下达作战指令");
}else{
if(this.gj19successor!=null)
{
this.gj19successor.handleMission(mission);
}
}
}
}
具体处理者–排长
package gjChainofResponsibilityPattern;
/**
* 具体处理者--排长
* @author gong
*
*/
public class Gj19Paizhang extends Gj19Officer{
public Gj19Paizhang(String name) {
super(name);
}
@Override
public void handleMission(Gj19Mission mission) {
if(mission.getEnemyNumber()>=10 && mission.getEnemyNumber()<50){
System.out.println("排长"+name+"接到"+mission.getSoldierName()+"的军情"+",敌人数量为"+mission.getEnemyNumber()+",可以下达作战指令");
}else{
if(this.gj19successor!=null)
{
this.gj19successor.handleMission(mission);
}
}
}
}
具体处理者–营长
package gjChainofResponsibilityPattern;
/**
* 具体处理者--营长
* @author gong
*
*/
public class Gj19Yingzhang extends Gj19Officer{
public Gj19Yingzhang(String name) {
super(name);
}
@Override
public void handleMission(Gj19Mission mission) {
if(mission.getEnemyNumber()>=50 && mission.getEnemyNumber()<200){
System.out.println("营长"+name+"接到"+mission.getSoldierName()+"的军情"+",敌人数量为"+mission.getEnemyNumber()+",可以下达作战指令");
}else{
System.out.println("接到"+mission.getSoldierName()+"的军情"+",敌人数量为"+mission.getEnemyNumber()+",敌人太多了,我们开会讨论一下吧!");
}
}
}
职责链模式客户端类
package gjChainofResponsibilityPattern;
/**
* 职责链模式客户端类
* @author gong
*
*/
public class Gj19Client {
public static void main(String[] args) {
Gj19Officer gj19Bangzhang = new Gj19Bangzhang("张小三");
Gj19Officer gj19Paizhang = new Gj19Paizhang("李小四");
Gj19Officer gj19Yingzhang =new Gj19Yingzhang("王小五");
gj19Bangzhang.setgj19Successor(gj19Paizhang);
gj19Paizhang.setgj19Successor(gj19Yingzhang);
Gj19Mission m1 = new Gj19Mission("周小妹", 8);
gj19Bangzhang.handleMission(m1);
Gj19Mission m2 = new Gj19Mission("曾小妹", 36);
gj19Bangzhang.handleMission(m2);
Gj19Mission m3 = new Gj19Mission("李小妹", 188);
gj19Bangzhang.handleMission(m3);
Gj19Mission m4 = new Gj19Mission("孙小妹", 269);
gj19Bangzhang.handleMission(m4);
}
}
五、运行结果: