获取本月月初日期,如:2022-01-11 00:00:00和月末

	public static Timestamp getFirstDayOfThisMonth(){
		Date beginDate = DateUtil.beginOfMonth(DateUtil.yesterday());//月初
//		Date endDate = DateUtil.endOfMonth(DateUtil.yesterday());//月末
		return Timestamp.valueOf(String.valueOf(beginDate));
	}