获取当天，本周，本月的起始时间
LocalDate today = LocalDate.now();// 取当前日期LocalDate inputDate = LocalDate.parse(formatter(today));//当天的System.out.println(ToStringPattern(getBeginOfDay(ToDatePattern(formatter(today)))));//-03-21 00:00:00System.out.println(ToStringPattern(getEndOfDay(ToDatePattern(formatter(today)))));//-03-21 23:59:59//本周的第一天TemporalAdjuster FIRST_OF_WEEK = TemporalAdjusters.ofDateAdjuster(localDate -> localDate.minusDays(localDate.getDayOfWeek().getValue() - DayOfWeek.MONDAY.getValue()));System.out.println(inputDate.with(FIRST_OF_WEEK));System.out.println(ToStringPattern(getBeginOfDay(ToDatePattern(formatter(inputDate.with(FIRST_OF_WEEK))))));//-03-19 00:00:00//本周的最后一天TemporalAdjuster LAST_OF_WEEK = TemporalAdjusters.ofDateAdjuster(localDate -> localDate.plusDays(DayOfWeek.SUNDAY.getValue() - localDate.getDayOfWeek().getValue()));System.out.println(inputDate.with(LAST_OF_WEEK));System.out.println(ToStringPattern(getEndOfDay(ToDatePattern(formatter(inputDate.with(LAST_OF_WEEK))))));//-03-25 23:59:59// 取本月第1天：LocalDate firstDayOfThisMonth = today.with(TemporalAdjusters.firstDayOfMonth()); // -12-01System.out.println(firstDayOfThisMonth);System.out.println(ToStringPattern(getBeginOfDay(ToDatePattern(formatter(firstDayOfThisMonth)))));//-03-01 00:00:00// 取本月最后一天，再也不用计算是28，29，30还是31：LocalDate lastDayOfThisMonth = today.with(TemporalAdjusters.lastDayOfMonth()); // -12-31System.out.println(ToStringPattern(getEndOfDay(ToDatePattern(formatter(lastDayOfThisMonth)))));//-03-31 23:59:59
String转化为Date
public static Date ToDatePattern(String convertString) {Date result = null;if (!org.springframework.util.StringUtils.isEmpty(convertString)) {try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");sdf.setLenient(false);result = sdf.parse(convertString);} catch (Exception ex) {}} else {}return result;}
Date转化为String
public static String ToStringPattern(Date date){String result=null;try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");result=sdf.format(date);} catch (Exception ex) {}return result;}
localDate转化Date
public static String formatter(LocalDate localDate) {DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");return localDate.format(dateTimeFormatter);}
获取指定日期的起始时间
public static Date getBeginOfDay(Date date) {Calendar cursorCal = Calendar.getInstance();cursorCal.setTime(date);cursorCal.set(Calendar.HOUR_OF_DAY, 0);cursorCal.set(Calendar.MINUTE, 0);cursorCal.set(Calendar.SECOND, 0);return cursorCal.getTime();}
获取指定日期的结束时间
public static Date getEndOfDay(Date date) {Calendar cursorCal = Calendar.getInstance();cursorCal.setTime(date);cursorCal.set(Calendar.HOUR, 23);cursorCal.set(Calendar.MINUTE, 59);cursorCal.set(Calendar.SECOND, 59);return cursorCal.getTime();}
