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设计模式课程 设计模式精讲 19-2 策略模式coding

时间:2019-10-09 09:27:18      阅读:107      评论:0      收藏:0      [点我收藏+]

1    代码演练

1.1  代码演练1(策略模式简单应用)

1.2  代码演练2

1.3  代码演练3

 

 

 

1    代码演练

 

1.1  代码演练1(策略模式简单应用)

需求:

木木网卖课程,为了促进销售,618实行买课程立减10元,双十一实行满50减10元,还有返现的优惠(这个活动还没有开始)。请实现它

 

uml类图:

技术分享图片

 

测试类:

 

package com.geely.design.pattern.behavioral.strategy;

public class TestStrategy {
    public static void main(String [] args){
        PromotionActivity promotionActivityLJ = new PromotionActivity(new LiJianPromotionStrategy());
        PromotionActivity promotionActivityMJ = new PromotionActivity(new ManJianPromotionStrategy());

        promotionActivityLJ.execute();
        promotionActivityMJ.execute();
    }
}

 

 

 

应用层:

package com.geely.design.pattern.behavioral.strategy;

public class PromotionActivity {
    private PromotionStrategy promotionStrategy;
    public PromotionActivity(PromotionStrategy promotionStrategy) {
        this.promotionStrategy = promotionStrategy;
    }

    public void execute(){
        promotionStrategy.doPromotion();
    }
}

 

 

 

实现类1:

package com.geely.design.pattern.behavioral.strategy;

public class LiJianPromotionStrategy implements PromotionStrategy {
    @Override
    public void doPromotion() {
        System.out.println("立减10元");
    }
}

 

 

 

实现类2:

package com.geely.design.pattern.behavioral.strategy;

public class ManJianPromotionStrategy implements PromotionStrategy {
    @Override
    public void doPromotion() {
        System.out.println("满50元减10元");
    }
}

 

 

 

实现类3:

package com.geely.design.pattern.behavioral.strategy;

public class FanXianPromotionStrategy implements PromotionStrategy {
    @Override
    public void doPromotion() {
        System.out.println("返现10元到木木网");
    }
}

 

 

 

接口:

package com.geely.design.pattern.behavioral.strategy;

/**
 * 初始接口
 */
public interface PromotionStrategy {
    void doPromotion();
}

 

打印日志:

立减10元
满50元减10元

Process finished with exit code 0

 

 

1.2  代码演练2

 

1.3  代码演练3

 

设计模式课程 设计模式精讲 19-2 策略模式coding

原文:https://www.cnblogs.com/1446358788-qq/p/11639220.html

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