获取起始时间

最新推荐文章于 2024-04-10 11:04:08 发布

原创最新推荐文章于 2024-04-10 11:04:08 发布 · 1.4k 阅读

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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)))));//2018-03-21 00:00:00
        System.out.println(ToStringPattern(getEndOfDay(ToDatePattern(formatter(today)))));//2018-03-21 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))))));//2018-03-19 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))))));//2018-03-25 23:59:59

        // 取本月第1天：
        LocalDate firstDayOfThisMonth = today.with(TemporalAdjusters.firstDayOfMonth()); // 2014-12-01
        System.out.println(firstDayOfThisMonth);
        System.out.println(ToStringPattern(getBeginOfDay(ToDatePattern(formatter(firstDayOfThisMonth)))));//2018-03-01 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()); // 2014-12-31
        System.out.println(ToStringPattern(getEndOfDay(ToDatePattern(formatter(lastDayOfThisMonth)))));//2018-03-31 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();
    }