import java.util.Arrays;import java.util.Date;import java.util.GregorianCalendar;/*** 工具类，实现阴阳历互转** @author luohao*/public class LunarCalendar {/*** 支持转换的最小农历年份*/public static final int MIN_YEAR = 1900;/*** 支持转换的最大农历年份*/public static final int MAX_YEAR = 2099;/*** 公历每月前的天数*/private static final int[] DAYS_BEFORE_MONTH = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};/*** 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*/private static final int[] LUNAR_INFO = {/*1900*/0x84B6BF,/*1901-1910*/0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A,/*1911-1920*/0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754,/*1921-1930*/0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E,/*1931-1940*/0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48,/*1941-1950*/0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51,/*1951-1960*/0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x6AD53C,/*1961-1970*/0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46,/*1971-1980*/0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50,/*1981-1990*/0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x095746, 0x5497BB,/*1991-2000*/0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645,/*2001-*/0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E,/*-*/0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9,/*-2030*/0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x6a573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43,/*2031-2040*/0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C,/*2041-2050*/0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37,/*2051-2060*/0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06AA44, 0x4AB638, 0x0AAE4C, 0x092E42,/*2061-2070*/0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B,/*2071-2080*/0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6,/*2081-2090*/0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E,/*2091-2099*/0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5};/*** 将农历日期转换为公历日期** @param year 农历年份* @param month农历月* @param monthDay 农历日* @param isLeapMonth 该月是否是闰月* @return 返回农历日期对应的公历日期，year0, month1, day2.*/public static final int[] lunarToSolar(int year, int month, int monthDay, boolean isLeapMonth) {int dayOffset;int leapMonth;int i;if (year < MIN_YEAR || year > MAX_YEAR || month < 1 || month > 12|| monthDay < 1 || monthDay > 30) {throw new IllegalArgumentException("Illegal lunar date, must be like that:\n\t" +"year : 1900~2099\n\t" +"month : 1~12\n\t" +"day : 1~30");}dayOffset = (LUNAR_INFO[year - MIN_YEAR] & 0x001F) - 1;if (((LUNAR_INFO[year - MIN_YEAR] & 0x0060) >> 5) == 2) {dayOffset += 31;}for (i = 1; i < month; i++) {if ((LUNAR_INFO[year - MIN_YEAR] & (0x80000 >> (i - 1))) == 0) {dayOffset += 29;} else {dayOffset += 30;}}dayOffset += monthDay;leapMonth = (LUNAR_INFO[year - MIN_YEAR] & 0xf00000) >> 20;// 这一年有闰月if (leapMonth != 0) {if (month > leapMonth || (month == leapMonth && isLeapMonth)) {if ((LUNAR_INFO[year - MIN_YEAR] & (0x80000 >> (month - 1))) == 0) {dayOffset += 29;} else {dayOffset += 30;}}}if (dayOffset > 366 || (year % 4 != 0 && dayOffset > 365)) {year += 1;if (year % 4 == 1) {dayOffset -= 366;} else {dayOffset -= 365;}}int[] solarInfo = new int[3];for (i = 1; i < 13; i++) {int iPos = DAYS_BEFORE_MONTH[i];if (year % 4 == 0 && i > 2) {iPos += 1;}if (year % 4 == 0 && i == 2 && iPos + 1 == dayOffset) {solarInfo[1] = i;solarInfo[2] = dayOffset - 31;break;}if (iPos >= dayOffset) {solarInfo[1] = i;iPos = DAYS_BEFORE_MONTH[i - 1];if (year % 4 == 0 && i > 2) {iPos += 1;}if (dayOffset > iPos) {solarInfo[2] = dayOffset - iPos;} else if (dayOffset == iPos) {if (year % 4 == 0 && i == 2) {solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1] + 1;} else {solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1];}} else {solarInfo[2] = dayOffset;}break;}}solarInfo[0] = year;return solarInfo;}/*** 将公历日期转换为农历日期，且标识是否是闰月** @param year* @param month* @param monthDay* @return 返回公历日期对应的农历日期，year0，month1，day2，leap3*/public static final int[] solarToLunar(int year, int month, int monthDay) {int[] lunarDate = new int[4];Date baseDate = new GregorianCalendar(1900, 0, 31).getTime();Date objDate = new GregorianCalendar(year, month - 1, monthDay).getTime();int offset = (int) ((objDate.getTime() - baseDate.getTime()) / 86400000L);// 用offset减去每农历年的天数计算当天是农历第几天// iYear最终结果是农历的年份, offset是当年的第几天int iYear, daysOfYear = 0;for (iYear = MIN_YEAR; iYear <= MAX_YEAR && offset > 0; iYear++) {daysOfYear = daysInLunarYear(iYear);offset -= daysOfYear;}if (offset < 0) {offset += daysOfYear;iYear--;}// 农历年份lunarDate[0] = iYear;int leapMonth = leapMonth(iYear);// 闰哪个月,1-12boolean isLeap = false;// 用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天int iMonth, daysOfMonth = 0;for (iMonth = 1; iMonth <= 13 && offset > 0; iMonth++) {daysOfMonth = daysInLunarMonth(iYear, iMonth);offset -= daysOfMonth;}// 当前月超过闰月，要校正if (leapMonth != 0 && iMonth > leapMonth) {--iMonth;if (iMonth == leapMonth) {isLeap = true;}}// offset小于0时，也要校正if (offset < 0) {offset += daysOfMonth;--iMonth;}lunarDate[1] = iMonth;lunarDate[2] = offset + 1;lunarDate[3] = isLeap ? 1 : 0;return lunarDate;}/*** 传回农历year年month月的总天数** @param year 要计算的年份* @param month 要计算的月* @return 传回天数*/final public static int daysInMonth(int year, int month) {return daysInMonth(year, month, false);}/*** 传回农历year年month月的总天数** @param year 要计算的年份* @param month 要计算的月* @param leap 当月是否是闰月* @return 传回天数，如果闰月是错误的，返回0.*/public static final int daysInMonth(int year, int month, boolean leap) {int leapMonth = leapMonth(year);int offset = 0;// 如果本年有闰月且month大于闰月时，需要校正if (leapMonth != 0 && month > leapMonth) {offset = 1;}// 不考虑闰月if (!leap) {return daysInLunarMonth(year, month + offset);} else {// 传入的闰月是正确的月份if (leapMonth != 0 && leapMonth == month) {return daysInLunarMonth(year, month + 1);}}return 0;}/*** 传回农历 year年的总天数** @param year 将要计算的年份* @return 返回传入年份的总天数*/private static int daysInLunarYear(int year) {int i, sum = 348;if (leapMonth(year) != 0) {sum = 377;}int monthInfo = LUNAR_INFO[year - MIN_YEAR] & 0x0FFF80;for (i = 0x80000; i > 0x7; i >>= 1) {if ((monthInfo & i) != 0) {sum += 1;}}return sum;}/*** 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*/private static int daysInLunarMonth(int year, int month) {if ((LUNAR_INFO[year - MIN_YEAR] & (0x100000 >> month)) == 0) {return 29;} else {return 30;}}/*** 传回农历 year年闰哪个月 1-12 , 没闰传回 0** @param year 将要计算的年份* @return 传回农历 year年闰哪个月1-12, 没闰传回 0*/private static int leapMonth(int year) {return ((LUNAR_INFO[year - MIN_YEAR] & 0xF00000)) >> 20;}public static void main(String[] args) {System.out.println(Arrays.toString(solarToLunar(, 4, 4)));System.out.println(Arrays.toString(lunarToSolar(, 4, 4,false)));}}
