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+import dayjs from "dayjs";
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+
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+interface LunarDateDetail {
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+ solarDate: string; // 阳历日期
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+ lunarYear: number; // 农历年份
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+ lunarMon: number; // 农历月份
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+ lunarDay: number; // 农历日期
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+ isLeap: boolean; // 是否闰月
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+ yearCyl: string; // 年柱,天干地支表示的年份
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+ monCyl: string; // 月柱,天干地支表示的月份
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+ dayCyl: string; // 日柱,天干地支表示的日期
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+ zodiac: string; // 生肖
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+ lunarYearCN: string; // 农历年份的中文写法
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+ lunarMonCN: string; // 农历月份的中文写法
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+ lunarDayCN: string; // 农历日期的中文写法
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+}
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+/**
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+ * LUNAR_INFO 数组值的计算原理:
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+ *
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+ * 每个值使用 16 进制表示,包括以下部分:
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+ * 1. 前 4 位:表示闰月的月份,如果没有闰月为 0。
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+ * 2. 中间 12 位:表示 1 到 12 月的大小月,1 为大月(30 天),0 为小月(29 天)。
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+ * 3. 后 4 位:表示闰月的天数,如果没有闰月为 0。
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+ *
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+ * 以 `0x04bd8` 为例:
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+ * - `0x` 表示这是一个 16 进制数。
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+ * - `04bd8` 是具体的 16 进制值。
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+ *
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+ * 转换为二进制后,`04bd8` 为 `0000 0100 1011 1101 1000`:
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+ * 1. 前 4 位 `0000`:表示该年份没有闰月(若有闰月,该值为闰月的月份)。
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+ * 2. 中间 12 位 `0100 1011 1101`:从左到右分别表示 1 到 12 月的天数。`1` 表示大月(30 天),`0` 表示小月(29 天)。
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+ * - `0`(1月):小月(29 天)
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+ * - `1`(2月):大月(30 天)
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+ * - `0`(3月):小月(29 天)
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+ * - `1`(4月):大月(30 天)
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+ * - `0`(5月):小月(29 天)
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+ * - `1`(6月):大月(30 天)
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+ * - `1`(7月):大月(30 天)
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+ * - `1`(8月):大月(30 天)
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+ * - `1`(9月):大月(30 天)
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+ * - `1`(10月):大月(30 天)
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+ * - `0`(11月):小月(29 天)
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+ * - `0`(12月):小月(29 天)
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+ * 3. 后 4 位 `1000`:表示闰月的天数。如果前 4 位为 `0000`(即没有闰月),则这一部分不使用。
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+ */
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+const LUNAR_INFO: number[] = [
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+ 0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2, //1900-1909
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+ 0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977, //1910-1919
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+ 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, //1920-1929
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+ 0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950, //1930-1939
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+ 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, //1940-1949
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+ 0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5b0, 0x14573, 0x052b0, 0x0a9a8, 0x0e950, 0x06aa0, //1950-1959
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+ 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, //1960-1969
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+ 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b6a0, 0x195a6, //1970-1979
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+ 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, //1980-1989
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+ 0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, //1990-1999
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+ 0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5, //2000-2009
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+ 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, //2010-2019
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+ 0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530, //2020-2029
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+ 0x05aa0, 0x076a3, 0x096d0, 0x04afb, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, //2030-2039
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+ 0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0, //2040-2049
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+ 0x14b63, 0x09370, 0x049f8, 0x04970, 0x064b0, 0x168a6, 0x0ea50, 0x06b20, 0x1a6c4, 0x0aae0, //2050-2059
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+ 0x0a2e0, 0x0d2e3, 0x0c960, 0x0d557, 0x0d4a0, 0x0da50, 0x05d55, 0x056a0, 0x0a6d0, 0x055d4, //2060-2069
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+ 0x052d0, 0x0a9b8, 0x0a950, 0x0b4a0, 0x0b6a6, 0x0ad50, 0x055a0, 0x0aba4, 0x0a5b0, 0x052b0, //2070-2079
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+ 0x0b273, 0x06930, 0x07337, 0x06aa0, 0x0ad50, 0x14b55, 0x04b60, 0x0a570, 0x054e4, 0x0d160, //2080-2089
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+ 0x0e968, 0x0d520, 0x0daa0, 0x16aa6, 0x056d0, 0x04ae0, 0x0a9d4, 0x0a2d0, 0x0d150, 0x0f252, //2090-2099
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+ 0x0d520 //2100
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+];
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+
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+const CHINESE_NUMBER = ["零", "一", "二", "三", "四", "五", "六", "七", "八", "九"];
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+const NUMBER_MONTH: string[] = ["正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬", "腊"];
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+const NUMBER_1: string[] = ["甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"];
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+const NUMBER_2: string[] = ["子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"];
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+const ZODIACS: string[] = ["鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪"];
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+
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+/**
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+ * 获取指定农历年的天数
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+ * @param y 年份
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+ * @returns 农历年天数
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+ */
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+const lunarYearDays = (y: number): number => {
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+ let sum = 348;
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+ for (let i = 0x8000; i > 0x8; i >>= 1) {
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+ sum += (LUNAR_INFO[y - 1900] & i) !== 0 ? 1 : 0;
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+ }
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+ return sum + yearLeapDays(y);
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+}
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+
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+/**
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+ * 获取指定年份的闰月月份
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+ * @param y 年份
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+ * @returns 闰月月份,非闰年返回0
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+ */
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+const yearLeapMonth = (y: number): number => LUNAR_INFO[y - 1900] & 0xf;
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+
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+/**
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+ * 获取指定年份的闰月天数
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+ * @param y 年份
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+ * @returns 闰月天数,非闰年返回0
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+ */
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+const yearLeapDays = (y: number): number => yearLeapMonth(y) ? ((LUNAR_INFO[y - 1900] & 0x10000) !== 0 ? 30 : 29) : 0;
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+
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+/**
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+ * 获取天干地支表示的月份或日期
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+ * @param num 月份或日期的数值
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+ * @returns 天干地支表示
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+ */
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+const cyclicalm = (num: number): string => NUMBER_1[num % 10] + NUMBER_2[num % 12];
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+
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+/**
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+ * 获取指定年月的阴历天数
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+ * @param y 农历年份
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+ * @param m 农历月份
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+ * @returns 月份天数
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+ */
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+const monthDays = (y: number, m: number): number => (LUNAR_INFO[y - 1900] & (0x10000 >> m)) === 0 ? 29 : 30;
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+
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+/**
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+ * 获取指定年份的生肖
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+ * @param y 农历年份
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+ * @returns 生肖
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+ */
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+const getYearZodiac = (y: number): string => ZODIACS[(y - 4) % 12];
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+
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+/**
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+ * 获取指定日期的农历表示
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+ * @param day 日期
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+ * @returns 农历表示
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+ */
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+const getDateCN = (day: number): string => {
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+ const prefixes = ["初", "十", "廿", "三十"];
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+
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+ if (day === 10) return "初十";
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+ if (day === 20) return "二十";
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+ if (day === 30) return "三十";
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+
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+ const tensPlace = Math.floor(day / 10);
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+ const unitsPlace = day % 10;
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+
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+ return prefixes[tensPlace] + (unitsPlace ? CHINESE_NUMBER[unitsPlace] : "");
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+}
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+
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+
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+/**
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+ * 获取指定农历年份的天干地支表示
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+ * @param lunarYear 农历年份
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+ * @returns 天干地支表示
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+ */
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+const getLunarYearText = (lunarYear: number): string => {
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+ return `${NUMBER_1[(lunarYear - 4) % 10]}${NUMBER_2[(lunarYear - 4) % 12]}年`;
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+}
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+
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+/**
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+ * 获取指定范围内的所有农历年份 信息
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+ * @param startYear 起始农历年份
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+ * @param endYear 结束农历年份
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+ * @returns 农历年份列表
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+ */
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+const getYears = (startYear: number, endYear: number) => {
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+ const years = [];
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+ for (let i = startYear; i <= endYear; i++) {
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+ years.push({
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+ year: i,
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+ lunarYear: getLunarYearText(i),
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+ lunarYearCN: i.toString().split('').map(i => CHINESE_NUMBER[Number(i)]).join('')
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+ });
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+ }
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+ return years;
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+}
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+
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+/**
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+ * 获取指定年份的所有农历月份
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+ * @param year 年份
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+ * @returns 农历闰月月份
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+ */
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+export const getYearLeapMonth = (year: number) => {
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+ const leap = yearLeapMonth(year)
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+ return {
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+ year,
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+ leapMonth: leap || undefined,
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+ leapMonthCN: leap ? `闰${NUMBER_MONTH[leap - 1]}月` : undefined,
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+ days: leap ? (LUNAR_INFO[year - 1900] & 0x10000) !== 0 ? 30 : 29 : 0
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+ };
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+}
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+
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+/**
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+ * 计算指定日期的农历元素
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+ * @param date 指定日期
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+ * @returns 农历信息
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+ */
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+export const getLunarDate = (date: dayjs.ConfigType): LunarDateDetail => {
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+ const lunarDate: number[] = new Array(7).fill(0);
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+ let temp = 0;
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+ let leap = 0;
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+
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+ const baseDate = dayjs(new Date(1900, 0, 31));
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+ const objDate = dayjs(date);
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+ let offset = objDate.diff(baseDate, "day");
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+
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+ lunarDate[5] = offset + 40; // 日柱,从1900-01-31开始的天数计算
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+ lunarDate[4] = 14; // 月柱,从1900-01-31开始的月数计算
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+
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+ let i = 1900;
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+ for (; i < 2100 && offset > 0; i++) {
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+ temp = lunarYearDays(i);
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+ offset -= temp;
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+ lunarDate[4] += 12; // 每经过一年增加12个月柱
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+ }
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+
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+ if (offset < 0) {
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+ offset += temp;
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+ i--;
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+ lunarDate[4] -= 12;
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+ }
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+
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+ lunarDate[0] = i; // 农历年份
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+ lunarDate[3] = i - 1864; // 年柱,甲子从1864年开始
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+ leap = yearLeapMonth(i); // 闰哪个月
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+ lunarDate[6] = 0; // 闰月标记,初始为0
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+
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+ for (let j = 1; j < 13 && offset > 0; j++) {
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+ if (leap > 0 && j === (leap + 1) && lunarDate[6] === 0) {
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+ --j;
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+ lunarDate[6] = 1;
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+ temp = yearLeapDays(i);
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+ } else {
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+ temp = monthDays(i, j);
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+ }
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+
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+ if (lunarDate[6] === 1 && j === (leap + 1)) {
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+ lunarDate[6] = 0;
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+ }
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+
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+ offset -= temp;
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+ if (lunarDate[6] === 0) {
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+ lunarDate[4]++;
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+ }
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+
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+ lunarDate[1] = j; // 农历月份
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+ }
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+
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+ if (offset === 0 && leap > 0 && lunarDate[6] === 1) {
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+ lunarDate[6] = 0;
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+ } else if (offset < 0) {
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+ offset += temp;
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+ lunarDate[1]--;
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+ lunarDate[4]--;
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+ }
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+
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+ lunarDate[2] = offset + 1; // 农历日期
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+
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+ return {
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+ solarDate: objDate.format('YYYY-MM-DD'), // 公历日期
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+ lunarYear: lunarDate[0], // 农历年份
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+ lunarMon: lunarDate[1] + 1, // 农历月份
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+ lunarDay: lunarDate[2], // 农历日期
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+ isLeap: Boolean(lunarDate[6]), // 是否闰月
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+ zodiac: getYearZodiac(lunarDate[0]), // 生肖
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+ yearCyl: cyclicalm(lunarDate[3]), // 年柱
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+ monCyl: cyclicalm(lunarDate[4]), // 月柱
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+ dayCyl: cyclicalm(lunarDate[5]), // 日柱
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+ lunarYearCN: `${lunarDate[0].toString().split('').map(i => CHINESE_NUMBER[Number(i)]).join('')}`, // 农历年份中文表示
|
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|
|
+ lunarMonCN: `${NUMBER_MONTH[lunarDate[1]]}月`, // 农历月份中文表示
|
|
|
|
+ lunarDayCN: getDateCN(lunarDate[2]) // 农历日期中文表示
|
|
|
|
+ };
|
|
|
|
+}
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|
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+
|
|
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|
+console.log(Date.now())
|
|
|
|
+// 2057-9-28
|
|
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|
+console.log(getLunarDate('2057-09-28'))
|
|
|
|
+// 农历丁丑(牛)年八月三十
|
|
|
|
+
|
|
|
|
+// 2097-8-7
|
|
|
|
+console.log(getLunarDate('2097-08-07'))
|
|
|
|
+// 农历丁巳(蛇)年七月一
|
|
|
|
+
|
|
|
|
+// 非闰月
|
|
|
|
+console.log(getLunarDate('2001-04-27'))
|
|
|
|
+// 闰月
|
|
|
|
+console.log(getLunarDate('2001-05-27'))
|
|
|
|
+
|
|
|
|
+console.log(getYearLeapMonth(2001))
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+console.log(getYears(2000, 2003))
|
|
|
|
+console.log(Date.now())
|