计算当前日期的下n个工作日或上n个工作日_从某日期的下一个工作日开始到一个日期之间有多少工作日-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_45357254/article/details/132305975

文章描述了两个Java方法，subtractDays和plusDays，用于在给定日期的基础上向前或向后计算指定数量的工作日，避开法定节假日和周末。

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 public static void main(String[] args) {
        List<String> isHolidays = Arrays.asList(
                "2023-12-31",
                "2023-04-29",
                "2023-04-05",
                "2023-06-24",
                "2023-06-23",
                "2023-06-22",
                "2023-09-30",
                "2023-10-01",
                "2023-01-27",
                "2023-01-26",
                "2023-01-21",
                "2023-01-25",
                "2023-05-01",
                "2023-09-29",
                "2023-01-02",
                "2023-01-24",
                "2023-01-01",
                "2023-01-23",
                "2023-05-03",
                "2023-01-22",
                "2023-05-02",
                "2023-10-03",
                "2023-10-02",
                "2023-04-30",
                "2023-10-05",
                "2023-10-04",
                "2023-10-06");
        List<String> isNotHolidays = Arrays.asList(
                "2023-04-23",
                "2023-06-25",
                "2023-01-29",
                "2023-01-28",
                "2023-05-06",
                "2023-10-07",
                "2023-10-08");

        System.out.println(subtractDays(LocalDate.parse("2023-06-27"), 3, isHolidays, isNotHolidays));
        System.out.println(plusDays(LocalDate.parse("2023-06-27"), 2, isHolidays, isNotHolidays));
    }


    //当前日期之前的第time个工作日
    public static LocalDate subtractDays(LocalDate date, int time, List<String> isHolidays, List<String> isNotHolidays) {
        LocalDate newDate = date.minusDays(1);
        if (isHolidays.contains(newDate.toString())) { // 节假日
            time++;
        } else if (!isNotHolidays.contains(newDate.toString()) && (newDate.getDayOfWeek() == DayOfWeek.SATURDAY || newDate.getDayOfWeek() == DayOfWeek.SUNDAY)) {
            //当前是周末而且不是补班
            time++;
        }
        if (time == 1) {
            return newDate;
        }
        return subtractDays(newDate, time - 1, isHolidays, isNotHolidays);
    }


    //当前日期之前后的第time个工作日
    public static LocalDate plusDays(LocalDate date, int time, List<String> isHolidays, List<String> isNotHolidays) {
        LocalDate newDate = date.plusDays(1);
        if (isHolidays.contains(newDate.toString())) { // 节假日
            time++;
        } else if (!isNotHolidays.contains(newDate.toString()) && (newDate.getDayOfWeek() == DayOfWeek.SATURDAY || newDate.getDayOfWeek() == DayOfWeek.SUNDAY)) {
            //当前是周末而且不是补班
            time++;
        }
        if (time == 1) {
            return newDate;
        }
        return plusDays(newDate, time - 1, isHolidays, isNotHolidays);
    }