/** * 获得明天凌晨的时间time * * @return */private long getNextDayZeroTime(){   Calendar calendar = Calendar.getInstance();   calendar.add(Calendar.DAY_OF_MONTH, 1);   calendar.set(Calendar.HOUR_OF_DAY, 0);   calendar.set(Calendar.MINUTE, 0);   calendar.set(Calendar.SECOND, 0);   calendar.set(Calendar.MILLISECOND, 0);   return calendar.getTimeInMillis();}/** * 根据给定的time获得昨天凌晨的时间 * 1、time=null,默认系统时间的昨天凌晨时间 * 2、time!=null,获得给定time的所在天的前一天的凌晨时间 * * @return 昨天凌晨的时间 */private static long getYesterdayZeroTimeByTime(Long time) {    Calendar calendar = Calendar.getInstance();    if (time != null) {        calendar.setTimeInMillis(time);    }    calendar.add(Calendar.DAY_OF_MONTH, -1);    calendar.set(Calendar.HOUR_OF_DAY, 0);    calendar.set(Calendar.MINUTE, 0);    calendar.set(Calendar.SECOND, 0);    calendar.set(Calendar.MILLISECOND, 0);    return calendar.getTimeInMillis();}