设计模式练习（18）——状态模式

状态模式

一、题目：

某纸牌游戏中，人物角色具有入门级（Primary），熟练级(Secondary)，高手级(Professional)和骨灰级(Final)四种等级，角色的等级与积分相对应，游戏胜利将增加积分，失败则扣除积分，入门级具有最基本的游戏功能play()，熟练级增加了游戏胜利积分加倍功能doubleScore（），高手级在熟练级基础上再增加换牌功能changeCards()，骨灰级在高手级基础上再增加偷看他人的牌的功能peekCards()，使用状态模式来设计系统

(1) 绘制状态模式结构视图

(2) 给出实例类图并实现代码

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)

环境类-玩家实体类

package gjStatePattern;
/**
* 玩家实体类
* @author gong
*
*/
public class Gj19Player {
private Gj19AbstractLevel level;
private String name;
private boolean isSuccess;
public Gj19Player(String name) {
this.level=new Gj19PrimaryLevel(this);
this.name = name;
}
public boolean isSuccess() {
return isSuccess;
}
public void setSuccess(boolean isSuccess) {
this.isSuccess = isSuccess;
}
public Gj19AbstractLevel getLevel() {
return level;
}
public void setLevel(Gj19AbstractLevel level) {
this.level = level;
}
public String getName() {
return name;
}
public void play(int score){
level.play(score);
}
public void doubleScore(int score){
level.doubleScore(score);
}
public void changeCards(int score){
level.changeCards(score);
}
public void peekCards(int score){
level.peekCards(score);
}
}

抽象状态类

package gjStatePattern;
/**
* 抽象状态类
* @author gong
*
*/
public abstract class Gj19AbstractLevel {
protected Gj19Player player;
protected String stateName;
protected int point;
public abstract void checkState(int score);

public int getPoint() {
return point;
}
public void setPoint(int point) {
this.point = point;
}
public String getStateName() {
return stateName;
}
public void setStateName(String stateName) {
this.stateName = stateName;
}
public void play(int score){
System.out.println(player.getName()+"拥有"+this.point+"积分，开始玩纸牌游戏");
if(player.isSuccess()==true){
this.point+=score;
}
else if(point>score&&player.isSuccess()==false){
System.out.println("分数已经最低，不可以再扣分了");
}
else if(player.isSuccess()==false){
this.point-=score;
}
System.out.println(player.isSuccess()==true?"你的牌打得忒好了，赢得一场比赛":"同志任需努力，输了一场比赛");
checkState(score);
System.out.println("积分剩余："+this.point+"，当前级别："+player.getLevel().getStateName());
}
public void doubleScore(int score){
System.out.println(player.getName()+"拥有"+this.point+"积分，游戏胜利可以积分加倍");
if(player.isSuccess()==true){
this.point+=2*score;
}
else if(point>score&&player.isSuccess()==false){
System.out.println("分数已经最低，不可以再扣分了");
}
else if(player.isSuccess()==false){
this.point-=score;
}
System.out.println(player.isSuccess()==true?"你的牌打得忒好了，赢得一场比赛":"同志任需努力，输了一场比赛");
checkState(score);
System.out.println("积分剩余："+this.point+"，当前级别："+player.getLevel().getStateName());
}
public void changeCards(int score){
System.out.println(player.getName()+"拥有"+this.point+"积分，可以和其他玩家换牌");
if(player.isSuccess()==true){
this.point+=score;
}
else if(point>score&&player.isSuccess()==false){
System.out.println("分数已经最低，不可以再扣分了");
}
else if(player.isSuccess()==false){
this.point-=score;
}
System.out.println(player.isSuccess()==true?"你的牌打得忒好了，赢得一场比赛":"同志任需努力，输了一场比赛");
checkState(score);
System.out.println("积分剩余："+this.point+"，当前级别："+player.getLevel().getStateName());
}
public void peekCards(int score){
System.out.println(player.getName()+"拥有"+this.point+"积分，可以偷看他人的牌");
if(player.isSuccess()==true){
this.point+=score;
}
else if(point>score&&player.isSuccess()==false){
System.out.println("分数已经最低，不可以再扣分了");
}
else if(player.isSuccess()==false){
this.point-=score;
}
System.out.println(player.isSuccess()==true?"你的牌打得忒好了，赢得一场比赛":"同志任需努力，输了一场比赛");
checkState(score);
System.out.println("积分剩余："+this.point+"，当前级别："+player.getLevel().getStateName());
}

}

具体状态类

package gjStatePattern;
/**
* 具体状态类
* @author gong
*
*/
public class Gj19PrimaryLevel extends Gj19AbstractLevel {
public Gj19PrimaryLevel(Gj19AbstractLevel level) {
this.player=level.player;
this.point=level.getPoint();
this.stateName="入门级玩家";
}
public Gj19PrimaryLevel(Gj19Player player) {
this.player=player;
this.stateName="入门级玩家";
this.point=0;
}
public void doubleScore(int score){
System.out.println("对不起"+player.getName()+",您没有获胜双倍积分的权利");
}
@Override
public void checkState(int score) {
if(this.point>1000){
player.setLevel(new Gj19FinalLevel(this));
}
else if(this.point>500){
player.setLevel(new Gj19ProfessionalLevel(this));
}
else if(this.point>200){
player.setLevel(new Gj19SecondaryLevel(this));
}

}

}

具体状态类

package gjStatePattern;
/**
* 具体状态类
* @author gong
*
*/

public class Gj19SecondaryLevel extends Gj19AbstractLevel {
public Gj19SecondaryLevel(Gj19AbstractLevel level) {
this.player=level.player;
this.point=level.getPoint();
this.stateName="熟练级玩家";
}
public void changeCards(int score){
System.out.println("对不起"+player.getName()+",您没有换牌的权利");
}
public void peekCards(int score){
System.out.println("对不起"+player.getName()+",您没有偷看别人牌的权利");
}
@Override
public void checkState(int score) {
if(this.point>1000){
player.setLevel(new Gj19FinalLevel(this));
}
else if(this.point>500){
player.setLevel(new Gj19ProfessionalLevel(this));
}
else if(this.point<200){
player.setLevel(new Gj19PrimaryLevel(this));
}

}

}

具体状态类

package gjStatePattern;
/**
* 具体状态类
* @author gong
*
*/

public class Gj19ProfessionalLevel extends Gj19AbstractLevel {
public Gj19ProfessionalLevel(Gj19AbstractLevel level) {
this.player=level.player;
this.point=level.getPoint();
this.stateName="高手级玩家";
}
public void peekCards(int score){
System.out.println("对不起"+player.getName()+",您没有偷看别人牌的权利");
}
@Override
public void checkState(int score) {
if(this.point>1000){
player.setLevel(new Gj19FinalLevel(this));
}
else if(this.point<200){
player.setLevel(new Gj19PrimaryLevel(this));
}
else if(this.point<500){
player.setLevel(new Gj19SecondaryLevel(this));
}

}

}

具体状态类

package gjStatePattern;
/**
* 具体状态类
* @author gong
*
*/
public class Gj19FinalLevel extends Gj19AbstractLevel {
public Gj19FinalLevel(Gj19AbstractLevel level) {
this.player=level.player;
this.point=level.getPoint();
this.stateName="骨灰级玩家";
}
@Override
public void checkState(int score) {
if(this.point<1000){
player.setLevel(new Gj19ProfessionalLevel(this));
}
else if(this.point<500){
player.setLevel(new Gj19SecondaryLevel(this));
}
else if(this.point<200){
player.setLevel(new Gj19PrimaryLevel(this));
}

}

}

状态模式客户端

package gjStatePattern;
/**
* 状态模式客户端
* @author gong
*
*/
public class Gj19Client {

public static void main(String[] args) {
Gj19Player player1=new Gj19Player("周小妹");
player1.setSuccess(true);
player1.play(200);
System.out.println("-----------------------------------------------");
player1.setSuccess(true);
player1.doubleScore(200);
System.out.println("===============================================");
player1.setSuccess(true);
player1.play(200);
System.out.println("===============================================");
player1.setSuccess(true);
player1.doubleScore(200);
System.out.println("-----------------------------------------------");
player1.setSuccess(true);
player1.peekCards(200);
System.out.println("===============================================");
player1.setSuccess(true);
player1.doubleScore(200);
System.out.println("===============================================");
}
}

五、运行结果：