1、获取本月的第一天和最后一天

// 本月第一天
DateTime firstDay = DateUtil.beginOfMonth(new Date());
// 本月最后一条
Date lastDay = DateUtil.endOfMonth(new Date());

2、获取今天的时间范围

DateTime beginOfDay = DateUtil.beginOfDay(new Date()); // 2023-09-25 00：00：00
DateTime endOfDay = DateUtil.endOfDay(new Date()); // 2023-09-25 23：59：59

3、获取本周的第一天和最后一天

DateTime beginOfWeek = DateUtil.beginOfWeek(new Date());
Date endOfWeek=DateUtil.endOfWeek(new Date());

4、获取上个月的时间范围

LocalDate currentDate = LocalDate.now(); // 当前日期
LocalDate previousMonthDate = currentDate.minusMonths(1); // 上个月日期
Month previousMonth = previousMonthDate.getMonth(); // 上个月的月份
int previousMonthYear = previousMonthDate.getYear(); // 上个月的年份
boolean leapYear = false;
// 判断是否为闰年
if(previousMonthYear%4 == 0  && previousMonthYear%100 !=0  || previousMonthYear%400 == 0){
	leapYear = true;
}
// 上个月的开始时间
LocalDateTime startOfPrevious = LocalDateTime.of(previousMonthYear, previousMonth, 1, 0, 0, 0); 
// 上个月的结束时间
LocalDateTime endOfPrevious = LocalDateTime.of(previousMonthYear, previousMonth, previousMonth.length(leapYear), 23, 59, 59); 
// 将LocalDateTime 转换为Date类型
ZoneId zoneId = ZoneId.systemDefault();
ZonedDateTime startMonth = startOfPrevious.atZone(zoneId);
ZonedDateTime endMonth = endOfPrevious.atZone(zoneId);
Date beginOfPreviousMonth = Date.from(startMonth.toInstant());
Date endOfPreviousMonth = Date.from(endMonth.toInstant());

5、获取本季度的第一天和最后一天

DateTime beginOfQuarter = DateUtil.beginOfQuarter(new Date());
DateTime endOfQuarter = DateUtil.endOfQuarter(new Date());

6、获取今年的第一天和最后一天

DateTime beginOfYear = DateUtil.beginOfYear(new Date());
DateTime endOfYear = DateUtil.endOfYear(new Date());

7、获取上一年的第一天和最后一天

Year currentYear = Year.now(); // 当前年份
Year previousYear = currentYear.minusYears(1); // 上一年
// 上一年的开始时间
LocalDateTime previousYearStart = previousYear.atDay(1).atStartOfDay(); 
// 上一年的结束时间
LocalDateTime previousYearEnd = previousYear.atMonth(12).atEndOfMonth().atTime(23, 59, 59); 
// 将LocalDateTime 转换为Date类型
ZoneId zoneYearId = ZoneId.systemDefault();
ZonedDateTime zdt = previousYearStart.atZone(zoneYearId);
ZonedDateTime end = previousYearEnd.atZone(zoneYearId);
Date beginOfPreviousYear = Date.from(zdt.toInstant());
Date endOfPreviousYear = Date.from(end.toInstant());