日期处理工具类DateUtils

一、

    /**
     * 获取当月所有日期
     * @return
     */
    public static List<String> getCurMonthDays() {
        List<String> datas = new ArrayList<>();
        String dateMonthVal = DateUtil.format(DateUtil.date(), "yyyy-MM");
        dateMonthVal = org.apache.commons.lang3.StringUtils.join(dateMonthVal, "-");
        int lengthOfMonthval = LocalDate.now().lengthOfMonth();
        for (int i = 1; i <= lengthOfMonthval; i++) {
            if (i < 10) {
                datas.add(org.apache.commons.lang3.StringUtils.join(dateMonthVal, "0", i));
            } else {
                datas.add(org.apache.commons.lang3.StringUtils.join(dateMonthVal, i));
            }
        }
        return datas;
    }
   /**
     * 获取时间段所有日期
     * @return
     */
    public static List<String> getAll(){
        LocalDate beginLocalDate = LocalDate.now().minusDays(30);
        LocalDate endLocalDate = LocalDate.now();
        List<String> localDateList = new ArrayList<>();
        long length = endLocalDate.toEpochDay() - beginLocalDate.toEpochDay();
        for (long i = length; i >= 0; i--) {
            LocalDate localDate = endLocalDate.minusDays(i);
            String localDateStr = localDate.format(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN));
            localDateList.add(localDateStr);
        }
        return localDateList;

    }

    public static void main(String[] args) {
        Long  l1 = 1732698940L;
        Long  l2 = 1732698980L;
        System.out.println("==="+(l2-l1));

        Long  ss = 1732642077000L;//毫秒
        Date dt = new Date(ss);

        //Long 值转datetime
        System.out.println(DateUtil.date(ss));
        //
        DateTime beginOfDay =DateUtil.beginOfDay(DateUtil.date());
        DateTime endOfDay =DateUtil.endOfDay(DateUtil.date());
        System.out.println("beginOfDay: "+beginOfDay);
        System.out.println("endOfDay: "+endOfDay);
        DateTime beginOfMonth =DateUtil.beginOfMonth(DateUtil.date());
        DateTime endOfMonth =DateUtil.endOfMonth(DateUtil.date());
        System.out.println("beginOfMonth: "+beginOfMonth);
        System.out.println("endOfMonth: "+endOfMonth);
===40
2024-11-27 01:27:57
beginOfDay: 2024-11-29 00:00:00
endOfDay: 2024-11-29 23:59:59
beginOfMonth: 2024-11-01 00:00:00
endOfMonth: 2024-11-30 23:59:59
    }