public static Date beginOfHour(@NotNull final Date date) {
		return DateUtils.truncate(date, Calendar.HOUR_OF_DAY);
	}
public static Date beginOfHour ( @ NotNull final Date date ) { return DateUtils . truncate ( date , Calendar . HOUR_OF_DAY ) ; }
2016-12-10 07:33:23, 则返回2016-12-10 07:00:00