时间处理(今天,昨天,本周,本月)

public static List<Date> today() throws ParseException {
        List<Date> listDate = new ArrayList<>();
        //今天
        Date date = new Date();
        //明天
        Date date2 = new Date(date.getTime() + 24 * 3600 * 1000);
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String formatDate = dateFormat.format(date);
        String formatDate2 = dateFormat.format(date2);

        Date today = dateFormat.parse(formatDate);
        Date tomorrow = dateFormat.parse(formatDate2);

        listDate.add(today);
        listDate.add(tomorrow);
        return listDate;
    }

    /**
     * 昨天
     *
     * @return
     * @throws ParseException
     */
    public static List<Date> yestoday() throws ParseException {
        List<Date> listDate = new ArrayList<>();
        //今天
        Date date = new Date();
        //昨天
        Date date2 = new Date(date.getTime() - 24 * 3600 * 1000);
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String formatDate = dateFormat.format(date);
        String formatDate2 = dateFormat.format(date2);

        Date today = dateFormat.parse(formatDate);
        Date yestoday = dateFormat.parse(formatDate2);

        listDate.add(today);
        listDate.add(yestoday);
        return listDate;
    }

    /**
     * 本周
     *
     * @return
     * @throws ParseException
     */
    public static List<Date> week() throws ParseException {
        List<Date> listDate = new ArrayList<>();
        //获取周一的值
        LocalDate today = LocalDate.now();
        LocalDate toweekMonday = today.with(DayOfWeek.MONDAY);
        LocalDate sunDay = today.with(DayOfWeek.SUNDAY);

        ZoneId zoneId = ZoneId.systemDefault();
        ZonedDateTime zonedDateTime = toweekMonday.atStartOfDay(zoneId);
        Date monday = Date.from(zonedDateTime.toInstant());
        ZonedDateTime zonedDateTime2 = sunDay.atStartOfDay(zoneId);
        Date sunday = Date.from(zonedDateTime2.toInstant());            //转化date类型
        listDate.add(monday);
        listDate.add(sunday);
        return listDate;
    }

    /**
     * 本月
     * @return
     * @throws ParseException
     */
    public static List<Date> month() throws ParseException {
        List<Date> listDate = new ArrayList<>();
        /**
         * 本月第一天
         */
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        GregorianCalendar gc2 = (GregorianCalendar) Calendar.getInstance();
        Calendar calendar2 = Calendar.getInstance();
        gc2.setTime(new Date());
        gc2.set(Calendar.DAY_OF_MONTH, 1);          //设置该月的第一天
        String b_day_first = df.format(gc2.getTime());
        StringBuffer str_b = new StringBuffer().append(b_day_first).append(" 00:00:00");//拼接 时分秒
        b_day_first = str_b.toString();

        /**
         * 本月最后一天
         */
        calendar2.add(Calendar.MONTH, 1);         //加一个月
        calendar2.set(Calendar.DATE, 1);         //设置为该月第一天
        calendar2.add(Calendar.DATE, -1);       //再减一天即为上个月最后一天
        String b_day_last = df.format(calendar2.getTime());
        StringBuffer endStrb = new StringBuffer().append(b_day_last).append("23:59:59");   //拼接 时,分,秒
        b_day_last = endStrb.toString();

        Date monthFirst = df.parse(b_day_first);
        Date monthLast = df.parse(b_day_last);

        listDate.add(monthFirst);
        listDate.add(monthLast);
        return listDate;
    }