计算时间差

小时差

public static long getHours(Date startDate,Date startTime,Date endDate,Date endTime) throws ParseException{        String start = Util.getDateTimeByDateAndTime(startDate,startTime);        String end = Util.getDateTimeByDateAndTime(endDate,endTime);        SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        long hours =  (sdf1.parse(end).getTime() - sdf1.parse(start).getTime())                / (60 * 60 * 1000);        return hours;    }