import 'package:flutter_custom_calendar/constants/constants.dart'; import 'package:flutter_custom_calendar/model/date_model.dart'; import 'package:flutter_custom_calendar/utils/date_util.dart'; import 'package:flutter_custom_calendar/utils/solar_term_util.dart'; /** * 农历的工具类 */ class LunarUtil { static List LUNAR_MONTH_DAYS = [ 1887, 0x1694, 0x16aa, 0x4ad5, 0xab6, 0xc4b7, 0x4ae, 0xa56, 0xb52a, 0x1d2a, 0xd54, 0x75aa, 0x156a, 0x1096d, 0x95c, 0x14ae, 0xaa4d, 0x1a4c, 0x1b2a, 0x8d55, 0xad4, 0x135a, 0x495d, 0x95c, 0xd49b, 0x149a, 0x1a4a, 0xbaa5, 0x16a8, 0x1ad4, 0x52da, 0x12b6, 0xe937, 0x92e, 0x1496, 0xb64b, 0xd4a, 0xda8, 0x95b5, 0x56c, 0x12ae, 0x492f, 0x92e, 0xcc96, 0x1a94, 0x1d4a, 0xada9, 0xb5a, 0x56c, 0x726e, 0x125c, 0xf92d, 0x192a, 0x1a94, 0xdb4a, 0x16aa, 0xad4, 0x955b, 0x4ba, 0x125a, 0x592b, 0x152a, 0xf695, 0xd94, 0x16aa, 0xaab5, 0x9b4, 0x14b6, 0x6a57, 0xa56, 0x1152a, 0x1d2a, 0xd54, 0xd5aa, 0x156a, 0x96c, 0x94ae, 0x14ae, 0xa4c, 0x7d26, 0x1b2a, 0xeb55, 0xad4, 0x12da, 0xa95d, 0x95a, 0x149a, 0x9a4d, 0x1a4a, 0x11aa5, 0x16a8, 0x16d4, 0xd2da, 0x12b6, 0x936, 0x9497, 0x1496, 0x1564b, 0xd4a, 0xda8, 0xd5b4, 0x156c, 0x12ae, 0xa92f, 0x92e, 0xc96, 0x6d4a, 0x1d4a, 0x10d65, 0xb58, 0x156c, 0xb26d, 0x125c, 0x192c, 0x9a95, 0x1a94, 0x1b4a, 0x4b55, 0xad4, 0xf55b, 0x4ba, 0x125a, 0xb92b, 0x152a, 0x1694, 0x96aa, 0x15aa, 0x12ab5, 0x974, 0x14b6, 0xca57, 0xa56, 0x1526, 0x8e95, 0xd54, 0x15aa, 0x49b5, 0x96c, 0xd4ae, 0x149c, 0x1a4c, 0xbd26, 0x1aa6, 0xb54, 0x6d6a, 0x12da, 0x1695d, 0x95a, 0x149a, 0xda4b, 0x1a4a, 0x1aa4, 0xbb54, 0x16b4, 0xada, 0x495b, 0x936, 0xf497, 0x1496, 0x154a, 0xb6a5, 0xda4, 0x15b4, 0x6ab6, 0x126e, 0x1092f, 0x92e, 0xc96, 0xcd4a, 0x1d4a, 0xd64, 0x956c, 0x155c, 0x125c, 0x792e, 0x192c, 0xfa95, 0x1a94, 0x1b4a, 0xab55, 0xad4, 0x14da, 0x8a5d, 0xa5a, 0x1152b, 0x152a, 0x1694, 0xd6aa, 0x15aa, 0xab4, 0x94ba, 0x14b6, 0xa56, 0x7527, 0xd26, 0xee53, 0xd54, 0x15aa, 0xa9b5, 0x96c, 0x14ae, 0x8a4e, 0x1a4c, 0x11d26, 0x1aa4, 0x1b54, 0xcd6a, 0xada, 0x95c, 0x949d, 0x149a, 0x1a2a, 0x5b25, 0x1aa4, 0xfb52, 0x16b4, 0xaba, 0xa95b, 0x936, 0x1496, 0x9a4b, 0x154a, 0x136a5, 0xda4, 0x15ac ]; static List SOLAR = [ 1887, 0xec04c, 0xec23f, 0xec435, 0xec649, 0xec83e, 0xeca51, 0xecc46, 0xece3a, 0xed04d, 0xed242, 0xed436, 0xed64a, 0xed83f, 0xeda53, 0xedc48, 0xede3d, 0xee050, 0xee244, 0xee439, 0xee64d, 0xee842, 0xeea36, 0xeec4a, 0xeee3e, 0xef052, 0xef246, 0xef43a, 0xef64e, 0xef843, 0xefa37, 0xefc4b, 0xefe41, 0xf0054, 0xf0248, 0xf043c, 0xf0650, 0xf0845, 0xf0a38, 0xf0c4d, 0xf0e42, 0xf1037, 0xf124a, 0xf143e, 0xf1651, 0xf1846, 0xf1a3a, 0xf1c4e, 0xf1e44, 0xf2038, 0xf224b, 0xf243f, 0xf2653, 0xf2848, 0xf2a3b, 0xf2c4f, 0xf2e45, 0xf3039, 0xf324d, 0xf3442, 0xf3636, 0xf384a, 0xf3a3d, 0xf3c51, 0xf3e46, 0xf403b, 0xf424e, 0xf4443, 0xf4638, 0xf484c, 0xf4a3f, 0xf4c52, 0xf4e48, 0xf503c, 0xf524f, 0xf5445, 0xf5639, 0xf584d, 0xf5a42, 0xf5c35, 0xf5e49, 0xf603e, 0xf6251, 0xf6446, 0xf663b, 0xf684f, 0xf6a43, 0xf6c37, 0xf6e4b, 0xf703f, 0xf7252, 0xf7447, 0xf763c, 0xf7850, 0xf7a45, 0xf7c39, 0xf7e4d, 0xf8042, 0xf8254, 0xf8449, 0xf863d, 0xf8851, 0xf8a46, 0xf8c3b, 0xf8e4f, 0xf9044, 0xf9237, 0xf944a, 0xf963f, 0xf9853, 0xf9a47, 0xf9c3c, 0xf9e50, 0xfa045, 0xfa238, 0xfa44c, 0xfa641, 0xfa836, 0xfaa49, 0xfac3d, 0xfae52, 0xfb047, 0xfb23a, 0xfb44e, 0xfb643, 0xfb837, 0xfba4a, 0xfbc3f, 0xfbe53, 0xfc048, 0xfc23c, 0xfc450, 0xfc645, 0xfc839, 0xfca4c, 0xfcc41, 0xfce36, 0xfd04a, 0xfd23d, 0xfd451, 0xfd646, 0xfd83a, 0xfda4d, 0xfdc43, 0xfde37, 0xfe04b, 0xfe23f, 0xfe453, 0xfe648, 0xfe83c, 0xfea4f, 0xfec44, 0xfee38, 0xff04c, 0xff241, 0xff436, 0xff64a, 0xff83e, 0xffa51, 0xffc46, 0xffe3a, 0x10004e, 0x100242, 0x100437, 0x10064b, 0x100841, 0x100a53, 0x100c48, 0x100e3c, 0x10104f, 0x101244, 0x101438, 0x10164c, 0x101842, 0x101a35, 0x101c49, 0x101e3d, 0x102051, 0x102245, 0x10243a, 0x10264e, 0x102843, 0x102a37, 0x102c4b, 0x102e3f, 0x103053, 0x103247, 0x10343b, 0x10364f, 0x103845, 0x103a38, 0x103c4c, 0x103e42, 0x104036, 0x104249, 0x10443d, 0x104651, 0x104846, 0x104a3a, 0x104c4e, 0x104e43, 0x105038, 0x10524a, 0x10543e, 0x105652, 0x105847, 0x105a3b, 0x105c4f, 0x105e45, 0x106039, 0x10624c, 0x106441, 0x106635, 0x106849, 0x106a3d, 0x106c51, 0x106e47, 0x10703c, 0x10724f, 0x107444, 0x107638, 0x10784c, 0x107a3f, 0x107c53, 0x107e48 ]; /** * 保存每年24节气 */ static final Map> SOLAR_TERMS = new Map(); /** * 公历节日 */ static List SOLAR_CALENDAR = [ "0101元旦", "0214情人节", "0308妇女节", "0312植树节", "0315消权日", "0401愚人节", "0422地球日", "0501劳动节", "0504青年节", "0601儿童节", "0701建党节", "0801建军节", "0910教师节", "1001国庆节", "1031万圣节", "1111光棍节", "1224平安夜", "1225圣诞节", ]; /** * 传统农历节日 */ static List TRADITION_FESTIVAL_STR = [ "除夕", "0101春节", "0115元宵", "0505端午", "0707七夕", "0815中秋", "0909重阳", ]; /** * 特殊节日、母亲节和父亲节,感恩节等 */ static final Map> SPECIAL_FESTIVAL = new Map(); /** * 特殊节日的数组 */ static List SPECIAL_FESTIVAL_STR = [ "母亲节", "父亲节", "感恩节", ]; /** * 用来表示1900年到2099年间农历年份的相关信息，共24位bit的16进制表示，其中： * 1. 前4位表示该年闰哪个月； * 2. 5-17位表示农历年份13个月的大小月分布，0表示小，1表示大； * 3. 最后7位表示农历年首（正月初一）对应的公历日期。 *

* 以2014年的数据0x955ABF为例说明： * 1001 0101 0101 1010 1011 1111 * 闰九月 农历正月初一对应公历1月31号 */ static final List LUNAR_INFO = [ 0x84B6BF, /*1900*/ 0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A, /*1901-1910*/ 0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754, /*1911-1920*/ 0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E, /*1921-1930*/ 0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48, /*1931-1940*/ 0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51, /*1941-1950*/ 0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x6AD53C, /*1951-1960*/ 0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46, /*1961-1970*/ 0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50, /*1971-1980*/ 0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x095746, 0x5497BB, /*1981-1990*/ 0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645, /*1991-2000*/ 0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E, /*2001-2010*/ 0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9, /*2011-2020*/ 0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x6a573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43, /*2021-2030*/ 0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C, /*2031-2040*/ 0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37, /*2041-2050*/ 0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06AA44, 0x4AB638, 0x0AAE4C, 0x092E42, /*2051-2060*/ 0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B, /*2061-2070*/ 0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6, /*2071-2080*/ 0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E, /*2081-2090*/ 0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5 /*2091-2099*/ ]; /** * 初始化各种农历、节日 * * @param calendar calendar */ static void setupLunarCalendar(DateModel dateModel) { int year = dateModel.year; int month = dateModel.month; int day = dateModel.day; // dateModel.isWeekend = DateUtil.isWeekend(new DateTime(year, month, day)); // dateModel.isLeapYear = DateUtil.isLeapYear(year); // dateModel.isCurrentDay = DateUtil.isCurrentDay(year, month, day); List lunar = LunarUtil.solarToLunar(2020, 2, day); // dateModel.lunarYear = (lunar[0]); // dateModel.lunarMonth = (lunar[1]); // dateModel.lunarDay = (lunar[2]); // if (lunar[3] == 1) { // //如果是闰月 // dateModel.leapMonth = lunar[1]; // } //24节气 // String solarTerm = getSolarTerm(year, month, day); // dateModel.solarTerm=solarTerm; // //公历节日 // String gregorian = gregorianFestival(month, day); // dateModel.gregorianFestival=gregorian; // //传统农历节日 // String festival = getTraditionFestival(lunar[0], lunar[1], lunar[2]); // dateModel.traditionFestival=festival; //农历格式的日期 String lunarText = numToChinese(lunar[1], lunar[2], lunar[3]); // if (gregorian.isEmpty) { // gregorian = getSpecialFestival(year, month, day); // } // if (solarTerm.isNotEmpty) { // dateModel.lunarString = solarTerm; // } else if (gregorian.isNotEmpty) { // dateModel.lunarString = gregorian; // } else if (festival.isNotEmpty) { // dateModel.lunarString = festival; // } else { // dateModel.lunarString = lunarText; // } } /** * 公历转农历 Solar To Lunar * * @param year 公历年 * @param month 公历月 * @param day 公历日 * @return [0]农历年 [1]农历月 [2]农历日 [3]是否闰月 0 false : 1 true */ static List solarToLunar(int year, int month, int day) { List lunarInt = new List(4); int index = year - SOLAR[0]; int data = (year << 9) | (month << 5) | (day); int solar11; if (SOLAR[index] > data) { index--; } solar11 = SOLAR[index]; int y = getBitInt(solar11, 12, 9); int m = getBitInt(solar11, 4, 5); int d = getBitInt(solar11, 5, 0); int offset = solarToInt(year, month, day) - solarToInt(y, m, d); int days = LUNAR_MONTH_DAYS[index]; int leap = getBitInt(days, 4, 13); int lunarY = index + SOLAR[0]; int lunarM = 1; int lunarD; offset += 1; for (int i = 0; i < 13; i++) { int dm = getBitInt(days, 1, 12 - i) == 1 ? 30 : 29; if (offset > dm) { lunarM++; offset -= dm; } else { break; } } lunarD = offset; lunarInt[0] = lunarY; lunarInt[1] = lunarM; lunarInt[3] = 0; if (leap != 0 && lunarM > leap) { lunarInt[1] = lunarM - 1; if (lunarM == leap + 1) { lunarInt[3] = 1; } } lunarInt[2] = lunarD; return lunarInt; } static int getBitInt(int data, int length, int shift) { return (data & (((1 << length) - 1) << shift)) >> shift; } static int solarToInt(int y, int m, int d) { m = (m + 9) % 12; y = y - (m / 10).toInt(); return (365 * y + (y / 4).toInt() - (y / 100).toInt() + (y / 400).toInt() + ((m * 306 + 5) / 10).toInt() + (d - 1)); } /** * 返回24节气 * * @param year 年 * @param month 月 * @param day 日 * @return 返回24节气 */ static String getSolarTerm(int year, int month, int day) { if (!SOLAR_TERMS.containsKey(year)) { SOLAR_TERMS.addAll({year: SolarTermUtil.getSolarTerms(year)}); } List solarTerm = SOLAR_TERMS[year]; String text = "${year}" + getString(month, day); String solar = ""; for (String solarTermName in solarTerm) { if (solarTermName.contains(text)) { solar = solarTermName.replaceAll(text, ""); break; } } return solar; } /** * 数字转换为农历节日或者日期 * * @param month 月 * @param day 日 * @param leap 1==闰月 * @return 数字转换为汉字日 */ static String numToChinese(int month, int day, int leap) { if (day == 1) { return numToChineseMonth(month, leap); } return CalendarConstants.LUNAR_DAY_TEXT[day - 1]; } /** * 数字转换为汉字月份 * * @param month 月 * @param leap 1==闰月 * @return 数字转换为汉字月份 */ static String numToChineseMonth(int month, int leap) { if (leap == 1) { return "闰" + CalendarConstants.LUNAR_MONTH_TEXT[month - 1]; } return CalendarConstants.LUNAR_MONTH_TEXT[month - 1]; } static String getString(int month, int day) { return (month >= 10 ? month.toString() : "0$month") + (day >= 10 ? day.toString() : "0$day"); } /** * 获取公历节日 * * @param month 公历月份 * @param day 公历日期 * @return 公历节日 */ static String gregorianFestival(int month, int day) { String text = getString(month, day); String solar = ""; for (String aMSolarCalendar in SOLAR_CALENDAR) { if (aMSolarCalendar.contains(text)) { solar = aMSolarCalendar.replaceAll(text, ""); break; } } return solar; } /** * 返回传统农历节日 * * @param year 农历年 * @param month 农历月 * @param day 农历日 * @return 返回传统农历节日 */ static String getTraditionFestival(int year, int month, int day) { if (month == 12) { int count = daysInLunarMonth(year, month); if (day == count) { return TRADITION_FESTIVAL_STR[0]; //除夕 } } String text = getString(month, day); String festivalStr = ""; for (String festival in TRADITION_FESTIVAL_STR) { if (festival.contains(text)) { festivalStr = festival.replaceAll(text, ""); break; } } return festivalStr; } /** * 传回农历 year年month月的总天数，总共有13个月包括闰月 * * @param year 将要计算的年份 * @param month 将要计算的月份 * @return 传回农历 year年month月的总天数 */ static int daysInLunarMonth(int year, int month) { if ((LUNAR_INFO[year - 1900] & (0x100000 >> month)) == 0) return 29; else return 30; } /** * 获取特殊计算方式的节日 * 如：每年五月的第二个星期日为母亲节，六月的第三个星期日为父亲节 * 每年11月第四个星期四定为"感恩节" * * @param year year * @param month month * @param day day * @return 获取西方节日 */ static String getSpecialFestival(int year, int month, int day) { if (!SPECIAL_FESTIVAL.containsKey(year)) { SPECIAL_FESTIVAL.addAll({year: getSpecialFestivals(year)}); } List specialFestivals = SPECIAL_FESTIVAL[year]; String text = "$year" + getString(month, day); String solar = ""; for (String special in specialFestivals) { if (special.contains(text)) { solar = special.replaceAll(text, ""); break; } } return solar; } /** * 获取每年的母亲节和父亲节和感恩节 * 特殊计算方式的节日 * * @param year 年 * @return 获取每年的母亲节和父亲节、感恩节 */ static List getSpecialFestivals(int year) { List festivals = new List(3); DateTime dateTime = new DateTime(year, 5, 1); //母亲节 int week = (dateTime.weekday + 1) % 8; int startDiff = 7 - week + 1; if (startDiff == 7) { festivals[0] = dateToString(year, 5, startDiff + 1) + SPECIAL_FESTIVAL_STR[0]; } else { festivals[0] = dateToString(year, 5, startDiff + 7 + 1) + SPECIAL_FESTIVAL_STR[0]; } //父亲节 dateTime = new DateTime(year, 6, 1); week = (dateTime.weekday + 1) % 8; startDiff = 7 - week + 1; if (startDiff == 7) { festivals[1] = dateToString(year, 6, startDiff + 7 + 1) + SPECIAL_FESTIVAL_STR[1]; } else { festivals[1] = dateToString(year, 6, startDiff + 7 + 7 + 1) + SPECIAL_FESTIVAL_STR[1]; } //感恩节 dateTime = new DateTime(year, 11, 1); week = (dateTime.weekday + 1) % 8; startDiff = 7 - week + 1; if (startDiff <= 2) { festivals[2] = dateToString(year, 11, startDiff + 21 + 5) + SPECIAL_FESTIVAL_STR[2]; } else { festivals[2] = dateToString(year, 11, startDiff + 14 + 5) + SPECIAL_FESTIVAL_STR[2]; } return festivals; } static String dateToString(int year, int month, int day) { return "$year" + getString(month, day); } }