Java 领劵或月卡小demo

最新推荐文章于 2023-01-11 11:52:55 发布

转载最新推荐文章于 2023-01-11 11:52:55 发布 · 324 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/saulc/blog/1928723

文章标签：

#java

本文通过Java代码示例，展示了如何使用SimpleDateFormat和Calendar类进行日期格式化、解析及时间戳比较，以判断优惠券是否过期，同时计算剩余有效天数。

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public static void main(String[] args){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar now = Calendar.getInstance();
        Calendar receiveDate = Calendar.getInstance();
        Calendar max = Calendar.getInstance();
        //当前时间
        try {
            //now.setTime(sdf.parse(sdf.format(new Date())));
            now.setTime(sdf.parse("2018-08-16"));
            System.out.println(sdf.format(now.getTime()));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //领劵时间
        try {
            receiveDate.setTime(sdf.parse("2018-08-10"));
            System.out.println(sdf.format(receiveDate.getTime()));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //劵的失效时间
        try {
            max.setTime(sdf.parse("2018-08-10"));
            max.add(Calendar.MONTH, +3);
            System.out.println(sdf.format(max.getTime()));
        } catch (ParseException e) {
            e.printStackTrace();
        }

        System.out.println("now.getTimeInMillis():"+now.getTimeInMillis());
        System.out.println("receiveDate.getTimeInMillis():"+receiveDate.getTimeInMillis());
        System.out.println("max.getTimeInMillis():"+max.getTimeInMillis());
        //如果当前时间大于等于领劵的失效时间
        if(now.getTimeInMillis()>= max.getTimeInMillis()){
            System.out.println(1);  //过期
        }else {//剩余天数还有几天
            System.out.println(2);
            long days = (max.getTimeInMillis() -now.getTimeInMillis())/ (1000 * 60 * 60 * 24);
            System.out.println(days);
        }


    }

转载于:https://my.oschina.net/saulc/blog/1928723