c#农历日历类
c#实现农历算法。来自java的写的一个农历算法，忘了出处。
农历
using System;using System.Collections.Generic;using System.Text;namespace ConsoleApp
{
/**//**
* ChineseCalendarGB.java * Copyright (c) 1997-2002 by Dr. Herong Yang * 中国农历算法- 实用于公历1901 年至2100 年之间的200 年
*/ public class CnCalendar { static fileds#region static fileds private static int[] DAYS_COUNT_IN_GREGORIAN_MONTH = new int[] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; private static string[] TIANGAN_NAMES = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" }; private static string[] DIZHI_NAMES = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" }; private static string[] SHENGXIAO_NAMES = { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" }; private static string[] MONTH_NAMES = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" }; private static string[] CHINESE_MONTH_NAMES = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬", "腊" }; private static string[] PRINCIPLE_TERM_NAMES = { "大寒", "雨水", "春分", "谷雨", "夏满", "夏至", "大暑", "处暑", "秋分", "霜降", "小雪", "冬至" }; private static string[] SECTIONDARY_TERM_NAME = { "小寒", "立春", "惊蛰", "清明", "立夏", "芒种", "小暑", "立秋", "白露", "寒露", "立冬", "大雪" }; // 农历月份大小压缩表，两个字节表示一年。两个字节共十六个二进制位数， // 前四个位数表示闰月月份，后十二个位数表示十二个农历月份的大小。 private static int[] chineseMonths = { 0x00,0x04,0xad,0x08,0x5a,0x01,0xd5,0x54,0xb4,0x09,0x64,0x05,0x59,0x45, 0x95,0x0a,0xa6,0x04,0x55,0x24,0xad,0x08,0x5a,0x62,0xda,0x04,0xb4,0x05, 0xb4,0x55,0x52,0x0d,0x94,0x0a,0x4a,0x2a,0x56,0x02,0x6d,0x71,0x6d,0x01, 0xda,0x02,0xd2,0x52,0xa9,0x05,0x49,0x0d,0x2a,0x45,0x2b,0x09,0x56,0x01, 0xb5,0x20,0x6d,0x01,0x59,0x69,0xd4,0x0a,0xa8,0x05,0xa9,0x56,0xa5,0x04, 0x2b,0x09,0x9e,0x38,0xb6,0x08,0xec,0x74,0x6c,0x05,0xd4,0x0a,0xe4,0x6a, 0x52,0x05,0x95,0x0a,0x5a,0x42,0x5b,0x04,0xb6,0x04,0xb4,0x22,0x6a,0x05, 0x52,0x75,0xc9,0x0a,0x52,0x05,0x35,0x55,0x4d,0x0a,0x5a,0x02,0x5d,0x31, 0xb5,0x02,0x6a,0x8a,0x68,0x05,0xa9,0x0a,0x8a,0x6a,0x2a,0x05,0x2d,0x09, 0xaa,0x48,0x5a,0x01,0xb5,0x09,0xb0,0x39,0x64,0x05,0x25,0x75,0x95,0x0a, 0x96,0x04,0x4d,0x54,0xad,0x04,0xda,0x04,0xd4,0x44,0xb4,0x05,0x54,0x85, 0x52,0x0d,0x92,0x0a,0x56,0x6a,0x56,0x02,0x6d,0x02,0x6a,0x41,0xda,0x02, 0xb2,0xa1,0xa9,0x05,0x49,0x0d,0x0a,0x6d,0x2a,0x09,0x56,0x01,0xad,0x50, 0x6d,0x01,0xd9,0x02,0xd1,0x3a,0xa8,0x05,0x29,0x85,0xa5,0x0c,0x2a,0x09, 0x96,0x54,0xb6,0x08,0x6c,0x09,0x64,0x45,0xd4,0x0a,0xa4,0x05,0x51,0x25, 0x95,0x0a,0x2a,0x72,0x5b,0x04,0xb6,0x04,0xac,0x52,0x6a,0x05,0xd2,0x0a, 0xa2,0x4a,0x4a,0x05,0x55,0x94,0x2d,0x0a,0x5a,0x02,0x75,0x61,0xb5,0x02, 0x6a,0x03,0x61,0x45,0xa9,0x0a,0x4a,0x05,0x25,0x25,0x2d,0x09,0x9a,0x68, 0xda,0x08,0xb4,0x09,0xa8,0x59,0x54,0x03,0xa5,0x0a,0x91,0x3a,0x96,0x04, 0xad,0xb0,0xad,0x04,0xda,0x04,0xf4,0x62,0xb4,0x05,0x54,0x0b,0x44,0x5d, 0x52,0x0a,0x95,0x04,0x55,0x22,0x6d,0x02,0x5a,0x71,0xda,0x02,0xaa,0x05, 0xb2,0x55,0x49,0x0b,0x4a,0x0a,0x2d,0x39,0x36,0x01,0x6d,0x80,0x6d,0x01, 0xd9,0x02,0xe9,0x6a,0xa8,0x05,0x29,0x0b,0x9a,0x4c,0xaa,0x08,0xb6,0x08, 0xb4,0x38,0x6c,0x09,0x54,0x75,0xd4,0x0a,0xa4,0x05,0x45,0x55,0x95,0x0a, 0x9a,0x04,0x55,0x44,0xb5,0x04,0x6a,0x82,0x6a,0x05,0xd2,0x0a,0x92,0x6a, 0x4a,0x05,0x55,0x0a,0x2a,0x4a,0x5a,0x02,0xb5,0x02,0xb2,0x31,0x69,0x03, 0x31,0x73,0xa9,0x0a,0x4a,0x05,0x2d,0x55,0x2d,0x09,0x5a,0x01,0xd5,0x48, 0xb4,0x09,0x68,0x89,0x54,0x0b,0xa4,0x0a,0xa5,0x6a,0x95,0x04,0xad,0x08, 0x6a,0x44,0xda,0x04,0x74,0x05,0xb0,0x25,0x54,0x03 }; // 初始日，公历农历对应日期： // 公历1901 年1 月1 日，对应农历4598 年11 月11 日 private static int baseYear = 1901; private static int baseMonth = 1; private static int baseDate = 1; private static int baseIndex = 0; private static int baseChineseYear = 4598 - 1; private static int baseChineseMonth = 11; private static int baseChineseDate = 11; private static int[][] sectionalTermMap = new int[][]{ new int[]{7,6,6,6,6,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,5,5,5,5,5,4,5,5}, new int[]{5,4,5,5,5,4,4,5,5,4,4,4,4,4,4,4,4,3,4,4,4,3,3,4,4,3,3,3}, new int[]{6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5}, new int[]{5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,4,4,5,5,4,4,4,5,4,4,4,4,5}, new int[]{6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5}, new int[]{6,6,7,7,6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5}, new int[]{7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,6,6,6,7,7}, new int[]{8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,7}, new int[]{8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,7}, new int[]{9,9,9,9,8,9,9,9,8,8,9,9,8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,8}, new int[]{8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,7}, new int[]{7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,6,6,6,7,7} }; private static int[][] sectionalTermYear = new int[][]{ new int[]{13,49,85,117,149,185,201,250,250}, new int[]{13,45,81,117,149,185,201,250,250}, new int[]{13,48,84,112,148,184,200,201,250}, new int[]{13,45,76,108,140,172,200,201,250}, new int[]{13,44,72,104,132,168,200,201,250}, new int[]{5 ,33,68,96 ,124,152,188,200,201}, new int[]{29,57,85,120,148,176,200,201,250}, new int[]{13,48,76,104,132,168,196,200,201}, new int[]{25,60,88,120,148,184,200,201,250}, new int[]{16,44,76,108,144,172,200,201,250}, new int[]{28,60,92,124,160,192,200,201,250}, new int[]{17,53,85,124,156,188,200,201,250} }; private static int[][] principleTermMap = new int[][]{ new int[]{21,21,21,21,21,20,21,21,21,20,20,21,21,20,20,20,20,20,20,20,20,19,20,20,20,19,19,20}, new int[]{20,19,19,20,20,19,19,19,19,19,19,19,19,18,19,19,19,18,18,19,19,18,18,18,18,18,18,18}, new int[]{21,21,21,22,21,21,21,21,20,21,21,21,20,20,21,21,20,20,20,21,20,20,20,20,19,20,20,20,20}, new int[]{20,21,21,21,20,20,21,21,20,20,20,21,20,20,20,20,19,20,20,20,19,19,20,20,19,19,19,20,20}, new int[]{21,22,22,22,21,21,22,22,21,21,21,22,21,21,21,21,20,21,21,21,20,20,21,21,20,20,20,21,21}, new int[]{22,22,22,22,21,22,22,22,21,21,22,22,21,21,21,22,21,21,21,21,20,21,21,21,20,20,21,21,21}, new int[]{23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,23,23,22,22,22,23,22,22,22,22,23}, new int[]{23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,23,23,22,22,22,23,23}, new int[]{23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,23,23,22,22,22,23,23}, new int[]{24,24,24,24,23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,23,23,23}, new int[] {23,23,23,23,22,23,23,23,22,22,23,23,22,22,22,23,22,22,22,22,21,22,22,22,21,21,22,22,22}, new int[] {22,22,23,23,22,22,22,23,22,22,22,22,21,22,22,22,21,21,22,22,21,21,21,22,21,21,21,21,22} }; private static int[][] principleTermYear = new int[][]{ new int[]{13,45,81,113,149,185,201}, new int[]{21,57,93,125,161,193,201}, new int[]{21,56,88,120,152,188,200,201}, new int[]{21,49,81,116,144,176,200,201}, new int[]{17,49,77,112,140,168,200,201}, new int[]{28,60,88,116,148,180,200,201}, new int[]{25,53,84,112,144,172,200,201}, new int[]{29,57,89,120,148,180,200,201}, new int[]{17,45,73,108,140,168,200,201}, new int[]{28,60,92,124,160,192,200,201}, new int[]{16,44,80,112,148,180,200,201}, new int[]{17,53,88,120,156,188,200,201} }; // 大闰月的闰年年份 private static int[] bigLeapMonthYears = { 6, 14, 19, 25, 33, 36, 38, 41, 44, 52, 55, 79, 117, 136, 147, 150, 155, 158, 185, 193 }; #endregion static methods#region static methods public static bool IsGregorianLeapYear(int year) { bool isLeap = false; if (year % 4 == 0) isLeap = true; if (year % 100 == 0) isLeap = false; if (year % 400 == 0) isLeap = true; return isLeap; } public static int DaysInGregorianMonth(int y, int m) { int d = DAYS_COUNT_IN_GREGORIAN_MONTH[m - 1]; if (m == 2 && IsGregorianLeapYear(y)) d++; // 公历闰年二月多一天 return d; } public static int DayOfYear(int y, int m, int d) { int c = 0; for (int i = 1; i < m; i++) { c = c + DaysInGregorianMonth(y, i); } c = c + d; return c; } public static int DayOfWeek(int y, int m, int d) { int w = 1; // 公历一年一月一日是星期一，所以起始值为星期日 y = (y - 1) % 400 + 1; // 公历星期值分部400 年循环一次 int ly = (y - 1) / 4; // 闰年次数 ly = ly - (y - 1) / 100; ly = ly + (y - 1) / 400; int ry = y - 1 - ly; // 常年次数 w = w + ry; // 常年星期值增一 w = w + 2 * ly; // 闰年星期值增二 w = w + DayOfYear(y, m, d); w = (w - 1) % 7 + 1; return w; } public static int DaysInChineseMonth(int y, int m) { // 注意：闰月m < 0 int index = y - baseChineseYear + baseIndex; int v = 0; int l = 0; int d = 30; if (1 <= m && m <= 8) { v = chineseMonths[2 * index]; l = m - 1; if (((v >> l) & 0x01) == 1) d = 29; } else if (9 <= m && m <= 12) { v = chineseMonths[2 * index + 1]; l = m - 9; if (((v >> l) & 0x01) == 1) d = 29; } else { v = chineseMonths[2 * index + 1]; v = (v >> 4) & 0x0F; if (v != Math.Abs(m)) { d = 0; } else { d = 29; for (int i = 0; i < bigLeapMonthYears.Length; i++) { if (bigLeapMonthYears[i] == index) { d = 30; break; } } } } return d; } public static int NextChineseMonth(int y, int m) { int n = Math.Abs(m) + 1; if (m > 0) { int index = y - baseChineseYear + baseIndex; int v = chineseMonths[2 * index + 1]; v = (v >> 4) & 0x0F; if (v == m) n = -m; } if (n == 13) n = 1; return n; } public static int SectionalTerm(int y, int m) { if (y < 1901 || y > 2100) return 0; int index = 0; int ry = y - baseYear + 1; while (ry >= sectionalTermYear[m - 1][index]) index++; int term = sectionalTermMap[m - 1][4 * index + ry % 4]; if ((ry == 121) && (m == 4)) term = 5; if ((ry == 132) && (m == 4)) term = 5; if ((ry == 194) && (m == 6)) term = 6; return term; } public static int PrincipleTerm(int y, int m) { if (y < 1901 || y > 2100) return 0; int index = 0; int ry = y - baseYear + 1; while (ry >= principleTermYear[m - 1][index]) index++; int term = principleTermMap[m - 1][4 * index + ry % 4]; if ((ry == 171) && (m == 3)) term = 21; if ((ry == 181) && (m == 5)) term = 21; return term; } public static string GetTextLine(int s, string t) { string str = " " + " " + " "; if (t != null && s < str.Length && s + t.Length < str.Length) str = str.Substring(0, s) + t + str.Substring(s + t.Length); return str; } #endregion private int gregorianYear = 1901; private int gregorianMonth = 1; private int gregorianDate = 1; private bool isGregorianLeap; private int dayOfYear; /**//// <summary> /// 周日------- 一星期的第一天 /// </summary> private int dayOfWeek; private int chineseYear; /**//// <summary> /// 负数表示闰月 /// </summary> private int chineseMonth; private int chineseDate; //24节气 private int sectionalTerm; private int principleTerm; public CnCalendar() { SetGregorian(1901, 1, 1); } public void SetGregorian(int y, int m, int d) { gregorianYear = y; gregorianMonth = m; gregorianDate = d; isGregorianLeap = IsGregorianLeapYear(y); dayOfYear = DayOfYear(y, m, d); dayOfWeek = DayOfWeek(y, m, d); chineseYear = 0; chineseMonth = 0; chineseDate = 0; sectionalTerm = 0; principleTerm = 0; } /**//// <summary> /// 根据设定的公历（阳历）年月人计算农历年月日天干地支 /// </summary> /// <returns>是否得到结果，得到结果为0，否则为1</returns> public int ComputeChineseFields() { if (gregorianYear < 1901 || gregorianYear > 2100) return 1; int startYear = baseYear; int startMonth = baseMonth; int startDate = baseDate; chineseYear = baseChineseYear; chineseMonth = baseChineseMonth; chineseDate = baseChineseDate; // 第二个对应日，用以提高计算效率 // 公历2000 年1 月1 日，对应农历4697 年11 月25 日 if (gregorianYear >= 2000) { startYear = baseYear + 99; startMonth = 1; startDate = 1; chineseYear = baseChineseYear + 99; chineseMonth = 11; chineseDate = 25; } int daysDiff = 0; for (int i = startYear; i < gregorianYear; i++) { daysDiff += 365; if (IsGregorianLeapYear(i)) daysDiff += 1; // leap year } for (int i = startMonth; i < gregorianMonth; i++) { daysDiff += DaysInGregorianMonth(gregorianYear, i); } daysDiff += gregorianDate - startDate; chineseDate += daysDiff; int lastDate = DaysInChineseMonth(chineseYear, chineseMonth); int nextMonth = NextChineseMonth(chineseYear, chineseMonth); while (chineseDate > lastDate) { if (Math.Abs(nextMonth) < Math.Abs(chineseMonth)) chineseYear++; chineseMonth = nextMonth; chineseDate -= lastDate; lastDate = DaysInChineseMonth(chineseYear, chineseMonth); nextMonth = NextChineseMonth(chineseYear, chineseMonth); } return 0; } /**//// <summary> /// 计算24节气 /// </summary> /// <returns></returns> public int ComputeSolarTerms() { if (gregorianYear < 1901 || gregorianYear > 2100) return 1; sectionalTerm = SectionalTerm(gregorianYear, gregorianMonth); principleTerm = PrincipleTerm(gregorianYear, gregorianMonth); return 0; } public override string ToString() { StringBuilder buf = new StringBuilder(); buf.Append("Gregorian Year: " + gregorianYear + "\n"); buf.Append("Gregorian Month: " + gregorianMonth + "\n"); buf.Append("Gregorian Date: " + gregorianDate + "\n"); buf.Append("Is Leap Year: " + isGregorianLeap + "\n"); buf.Append("Day of Year: " + dayOfYear + "\n"); buf.Append("Day of Week: " + dayOfWeek + "\n"); buf.Append("Chinese Year: " + chineseYear + "\n"); buf.Append("Heavenly Stem: " + TIANGAN_NAMES[((chineseYear - 1) % 10)] + "\n"); buf.Append("Earthly Branch: " + DIZHI_NAMES[((chineseYear - 1) % 12)] + "\n"); buf.Append("Chinese Month: " + chineseMonth + "\n"); buf.Append("Chinese Date: " + chineseDate + "\n"); buf.Append("Sectional Term: " + sectionalTerm + "\n"); buf.Append("Principle Term: " + principleTerm + "\n"); return buf.ToString(); } /**//// <summary> /// 计算指定日期的明天的农历 /// </summary> public void RollUpOneDay() { dayOfWeek = dayOfWeek % 7 + 1; dayOfYear++; gregorianDate++; int days = DaysInGregorianMonth(gregorianYear, gregorianMonth); if (gregorianDate > days) { gregorianDate = 1; gregorianMonth++; if (gregorianMonth > 12) { gregorianMonth = 1; gregorianYear++; dayOfYear = 1; isGregorianLeap = IsGregorianLeapYear(gregorianYear); } sectionalTerm = SectionalTerm(gregorianYear, gregorianMonth); principleTerm = PrincipleTerm(gregorianYear, gregorianMonth); } chineseDate++; days = DaysInChineseMonth(chineseYear, chineseMonth); if (chineseDate > days) { chineseDate = 1; chineseMonth = NextChineseMonth(chineseYear, chineseMonth); if (chineseMonth == 1) chineseYear++; } } }
}初始化类之后，使用方法ComputeChineseFields()即可获得农历相关字段。
