千萬一定注意

1. yyyy-MM-dd HH:mm:ss裡面，
   MM代表月份,mm代表分鐘，大小寫一定不能亂寫
2. yyyy-MM-dd HH:mm:ss裡面,
   HH代表24小時制,hh代表12小時制.

DateUtil:

 public static Date transferDateTime(String dateStr) throws ParseDateException{
        String format = "yyyy-MM-dd HH:mm:ss";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        Date
 
 date;
        try {
            date = sdf.parse(dateStr);
        } catch (ParseException e) {
            throw new ParseDateException();
        }
        return date;
    }

    public static String transferDateToString(Date date){
        String format = "yyyy-MM-dd HH:mm:ss";
        SimpleDateFormat sdf =
 
 new SimpleDateFormat(format);
        String dateStr = sdf.format(date);
        return dateStr;
    }

對時間的加減

        String sendTime = "2016-12-29 00:00:00":
        Date date = DateUtils.transferDateTime(sendTime);
        //減五分鐘
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date
 
);
        calendar.add(Calendar.MINUTE, -5);
        String startTime = DateUtils.transferDateToString(calendar.getTime());
        //加五分鐘
        Calendar calendar2 = Calendar.getInstance();
        calendar2.setTime(date);
        calendar2.add(Calendar.MINUTE, 5);
        String endTime = DateUtils.transferDateToString(calendar2.getTime());

        Map<String, String> map = new HashMap<>(2);
        map.put("startTime", startTime);
        map.put("endTime", endTime);