java根据截止日期计算倒计时

系统管理员 2023-06-05 08:59 20阅读 0赞

## 需求： ##

**需要根据一个目标时间计算当前时间截止到目标时间的倒计时时间。**

## 常见场景： ##

**电商项目订单模块中，需展示订单支付的倒计时时间、订单确认收货的倒计时时间等等等等…**

## 实现方式： ##

**java后台实现**

/**
     * @Author chenqi
     * @Description Java 实现倒计时（由秒计算天、小时、分钟、秒）
     * @Date 17:39 2019/5/15
     **/
    public class CountDownUtils {
        private static long day = 0;
        private static long hour = 0;
        private static long minute = 0;
        private static long second = 0;
    
        private static boolean dayNotAlready = false;
        private static boolean hourNotAlready = false;
        private static boolean minuteNotAlready = false;
        private static boolean secondNotAlready = false;
    
        /**
         * @Author chenqi
         * @Description 根据目标时间计算倒计时  天:小时:分钟:秒
         * @Date 17:41 2019/5/15
         * @Param [overTime(目标时间),currentDateTime(当前时间或指定时间)]
         * @return void
         **/
        public static String getCountDown(String overTime, String currentDateTime) {
            Long totalSeconds = getTimeDiffSecond(overTime,currentDateTime);	
            resetData();
    
            if (totalSeconds > 0) {
                secondNotAlready = true;
                second = totalSeconds;
                if (second >= 60) {
                    minuteNotAlready = true;
                    minute = second / 60;
                    second = second % 60;
                    if (minute >= 60) {
                        hourNotAlready = true;
                        hour = minute / 60;
                        minute = minute % 60;
                        if (hour > 24) {
                            dayNotAlready = true;
                            day = hour / 24;
                            hour = hour % 24;
                        }
                    }
                }
            }
    
            return  day + ":" + hour + ":" + minute+ ":" + second;
        }
    
        private static void resetData() {
            day = 0;
            hour = 0;
            minute = 0;
            second = 0;
            dayNotAlready = false;
            hourNotAlready = false;
            minuteNotAlready = false;
            secondNotAlready = false;
        }
    
    	/**
        * @Author chenqi
        * @Description 获取两个时间的秒时差 date1 - date2
        * @Date 17:51 2019/5/15
        * @Param [date1, date2]
        * @return long
        **/
        public static long getTimeDiffSecond(String date1, String date2) {
           if (date1 == null || date1.equals(""))
              return 0;
           if (date2 == null || date2.equals(""))
              return 0;
           // 转换为标准时间
           SimpleDateFormat myFormatter = new SimpleDateFormat(DATE_TIME_PATTERN);
           java.util.Date date = null;
           java.util.Date mydate = null;
           try {
              date = myFormatter.parse(date1);
              mydate = myFormatter.parse(date2);
           } catch (Exception e) {
              e.printStackTrace();
           }
           long day = (date.getTime() - mydate.getTime()) / 1000;
           return day;
        }
    
    
    }

如果该文章有帮助到您，就留言点个赞吧！您的支持与肯定是我持续更新最大的动力。