用Java实现的农历公历互转
这个代码有些问题，又发了一个新的，看到的同学请移步这里。
最近在自己写一个Android应用，需要用到公历和农历互转，这个实现起来似乎有点麻烦，google了一下，发现有很多现成的（其实都是一个程序，到处转载），不过都写得相当臃肿，20+K的东西放在手机应用里确实太大。仔细看了一下代码，如果只要公历和公历互转的话只需要其中很少的一部分就OK了，贴出来，方便需要的同学们，在这里一并感谢代码的原作者！
PS：正在做的应用完全做好之后会在博客发布，也希望对大家有用，最近工作有点忙，争取在五一做完吧！
/** * 日期工具类 * @author iStar * */ public class CalendarUtil { /** * The solar calendar is turned into the lunar calendar * @param iYear * @param iMonth * @param iDay * @return */ public static String solarToLundar(int iYear, int iMonth, int iDay) { int iLDay, iLMonth, iLYear; int iOffsetDays = iGetSNewYearOffsetDays(iYear, iMonth, iDay); int iLeapMonth = iGetLLeapMonth(iYear); if (iOffsetDays < iSolarLunarOffsetTable[iYear - 1901]) { iLYear = iYear - 1; iOffsetDays = iSolarLunarOffsetTable[iYear - 1901] - iOffsetDays; iLDay = iOffsetDays; for (iLMonth = 12; iOffsetDays > iGetLMonthDays(iLYear, iLMonth); iLMonth--) { iLDay = iOffsetDays; iOffsetDays -= iGetLMonthDays(iLYear, iLMonth); } if (0 == iLDay) iLDay = 1; else iLDay = iGetLMonthDays(iLYear, iLMonth) - iOffsetDays + 1; } else { iLYear = iYear; iOffsetDays -= iSolarLunarOffsetTable[iYear - 1901]; iLDay = iOffsetDays + 1; for (iLMonth = 1; iOffsetDays >= 0; iLMonth++) { iLDay = iOffsetDays + 1; iOffsetDays -= iGetLMonthDays(iLYear, iLMonth); if ((iLeapMonth == iLMonth) && (iOffsetDays > 0)) { iLDay = iOffsetDays; iOffsetDays -= iGetLMonthDays(iLYear, iLMonth + 12); if (iOffsetDays <= 0) { iLMonth += 12 + 1; break; } } } iLMonth--; } return iLYear + "-" + (iLMonth > 9 ? "" + iLMonth : "0" + iLMonth) + "-" + (iLDay > 9 ? "" + iLDay : "0" + iLDay); } /** * The lunar calendar is turned into the Solar calendar * @param iYear * @param iMonth * @param iDay * @return */ public static String lundarToSolar(int iYear, int iMonth, int iDay) { int iSYear, iSMonth, iSDay; int iOffsetDays = iGetLNewYearOffsetDays(iYear, iMonth, iDay) + iSolarLunarOffsetTable[iYear - 1901]; int iYearDays = bIsSolarLeapYear(iYear) ? 366 : 365; if (iOffsetDays >= iYearDays) { iSYear = iYear + 1; iOffsetDays -= iYearDays; } else { iSYear = iYear; } iSDay = iOffsetDays + 1; for (iSMonth = 1; iOffsetDays >= 0; iSMonth++) { iSDay = iOffsetDays + 1; iOffsetDays -= iGetSYearMonthDays(iSYear, iSMonth); } iSMonth--; return iSYear + "-" + (iSMonth > 9 ? iSMonth + "" : "0" + iSMonth) + "-" + (iSDay > 9 ? iSDay + "" : "0" + iSDay); } // Array lIntLunarDay is stored in the monthly day information in every year from 1901 to 2100 of the lunar calendar, // The lunar calendar can only be 29 or 30 days every month, express with 12(or 13) pieces of binary bit in one year, // it is 30 days for 1 form in the corresponding location , otherwise it is 29 days private static final int[] iLunarMonthDaysTable = { 0x4ae0, 0xa570, 0x5268, 0xd260, 0xd950, 0x6aa8, 0x56a0, 0x9ad0, 0x4ae8, 0x4ae0, // 1910 0xa4d8, 0xa4d0, 0xd250, 0xd548, 0xb550, 0x56a0, 0x96d0, 0x95b0, 0x49b8, 0x49b0, // 1920 0xa4b0, 0xb258, 0x6a50, 0x6d40, 0xada8, 0x2b60, 0x9570, 0x4978, 0x4970, 0x64b0, // 1930 0xd4a0, 0xea50, 0x6d48, 0x5ad0, 0x2b60, 0x9370, 0x92e0, 0xc968, 0xc950, 0xd4a0, // 1940 0xda50, 0xb550, 0x56a0, 0xaad8, 0x25d0, 0x92d0, 0xc958, 0xa950, 0xb4a8, 0x6ca0, // 1950 0xb550, 0x55a8, 0x4da0, 0xa5b0, 0x52b8, 0x52b0, 0xa950, 0xe950, 0x6aa0, 0xad50, // 1960 0xab50, 0x4b60, 0xa570, 0xa570, 0x5260, 0xe930, 0xd950, 0x5aa8, 0x56a0, 0x96d0, // 1970 0x4ae8, 0x4ad0, 0xa4d0, 0xd268, 0xd250, 0xd528, 0xb540, 0xb6a0, 0x96d0, 0x95b0, // 1980 0x49b0, 0xa4b8, 0xa4b0, 0xb258, 0x6a50, 0x6d40, 0xada0, 0xab60, 0x9370, 0x4978, // 1990 0x4970, 0x64b0, 0x6a50, 0xea50, 0x6b28, 0x5ac0, 0xab60, 0x9368, 0x92e0, 0xc960, // 2000 0xd4a8, 0xd4a0, 0xda50, 0x5aa8, 0x56a0, 0xaad8, 0x25d0, 0x92d0, 0xc958, 0xa950, // 2010 0xb4a0, 0xb550, 0xb550, 0x55a8, 0x4ba0, 0xa5b0, 0x52b8, 0x52b0, 0xa930, 0x74a8, // 2020 0x6aa0, 0xad50, 0x4da8, 0x4b60, 0x9570, 0xa4e0, 0xd260, 0xe930, 0xd530, 0x5aa0, // 2030 0x6b50, 0x96d0, 0x4ae8, 0x4ad0, 0xa4d0, 0xd258, 0xd250, 0xd520, 0xdaa0, 0xb5a0, // 2040 0x56d0, 0x4ad8, 0x49b0, 0xa4b8, 0xa4b0, 0xaa50, 0xb528, 0x6d20, 0xada0, 0x55b0 // 2050 }; // Array iLunarLeapMonthTable preserves the lunar calendar leap month from 1901 to 2050, // if it is 0 express not to have , every byte was stored for two years private static final char[] iLunarLeapMonthTable = { 0x00, 0x50, 0x04, 0x00, 0x20, // 1910 0x60, 0x05, 0x00, 0x20, 0x70, // 1920 0x05, 0x00, 0x40, 0x02, 0x06, // 1930 0x00, 0x50, 0x03, 0x07, 0x00, // 1940 0x60, 0x04, 0x00, 0x20, 0x70, // 1950 0x05, 0x00, 0x30, 0x80, 0x06, // 1960 0x00, 0x40, 0x03, 0x07, 0x00, // 1970 0x50, 0x04, 0x08, 0x00, 0x60, // 1980 0x04, 0x0a, 0x00, 0x60, 0x05, // 1990 0x00, 0x30, 0x80, 0x05, 0x00, // 2000 0x40, 0x02, 0x07, 0x00, 0x50, // 2010 0x04, 0x09, 0x00, 0x60, 0x04, // 2020 0x00, 0x20, 0x60, 0x05, 0x00, // 2030 0x30, 0xb0, 0x06, 0x00, 0x50, // 2040 0x02, 0x07, 0x00, 0x50, 0x03 // 2050 }; // Array iSolarLunarTable stored the offset days // in New Year of solar calendar and lunar calendar from 1901 to 2050; private static final char[] iSolarLunarOffsetTable = { 49, 38, 28, 46, 34, 24, 43, 32, 21, 40, // 1910 29, 48, 36, 25, 44, 34, 22, 41, 31, 50, // 1920 38, 27, 46, 35, 23, 43, 32, 22, 40, 29, // 1930 47, 36, 25, 44, 34, 23, 41, 30, 49, 38, // 1940 26, 45, 35, 24, 43, 32, 21, 40, 28, 47, // 1950 36, 26, 44, 33, 23, 42, 30, 48, 38, 27, // 1960 45, 35, 24, 43, 32, 20, 39, 29, 47, 36, // 1970 26, 45, 33, 22, 41, 30, 48, 37, 27, 46, // 1980 35, 24, 43, 32, 50, 39, 28, 47, 36, 26, // 1990 45, 34, 22, 40, 30, 49, 37, 27, 46, 35, // 2000 23, 42, 31, 21, 39, 28, 48, 37, 25, 44, // 2010 33, 23, 41, 31, 50, 39, 28, 47, 35, 24, // 2020 42, 30, 21, 40, 28, 47, 36, 25, 43, 33, // 2030 22, 41, 30, 49, 37, 26, 44, 33, 23, 42, // 2040 31, 21, 40, 29, 47, 36, 25, 44, 32, 22, // 2050 }; static boolean bIsSolarLeapYear(int iYear) { return ((iYear % 4 == 0) && (iYear % 100 != 0) || iYear % 400 == 0); } // The days in the month of solar calendar static int iGetSYearMonthDays(int iYear, int iMonth) { if ((iMonth == 1) || (iMonth == 3) || (iMonth == 5) || (iMonth == 7) || (iMonth ==|| (iMonth == 10) || (iMonth == 12)) return 31; else if ((iMonth == 4) || (iMonth == 6) || (iMonth == 9) || (iMonth == 11)) return 30; else if (iMonth == 2) { if (bIsSolarLeapYear(iYear)) return 29; else return 28; } else return 0; } // The offset days from New Year and the day when point out in solar calendar static int iGetSNewYearOffsetDays(int iYear, int iMonth, int iDay) { int iOffsetDays = 0; for (int i = 1; i < iMonth; i++) { iOffsetDays += iGetSYearMonthDays(iYear, i); } iOffsetDays += iDay - 1; return iOffsetDays; } static int iGetLLeapMonth(int iYear) { char iMonth = iLunarLeapMonthTable[(iYear - 1901) / 2]; if (iYear % 2 == 0) return (iMonth & 0x0f); else return (iMonth & 0xf0) >> 4; } static int iGetLMonthDays(int iYear, int iMonth) { int iLeapMonth = iGetLLeapMonth(iYear); if ((iMonth > 12) && (iMonth - 12 != iLeapMonth) || (iMonth < 0)) { System.out.println("Wrong month, ^_^ , i think you are want a -1, go to death!"); return -1; } if (iMonth - 12 == iLeapMonth) { if ((iLunarMonthDaysTable[iYear - 1901] & (0x8000 >> iLeapMonth)) == 0) return 29; else return 30; } if ((iLeapMonth > 0) && (iMonth > iLeapMonth)) iMonth++; if ((iLunarMonthDaysTable[iYear - 1901] & (0x8000 >> (iMonth - 1))) == 0) return 29; else return 30; } // Days in this year of lunar calendar static int iGetLYearDays(int iYear) { int iYearDays = 0; int iLeapMonth = iGetLLeapMonth(iYear); for (int i = 1; i < 13; i++) iYearDays += iGetLMonthDays(iYear, i); if (iLeapMonth > 0) iYearDays += iGetLMonthDays(iYear, iLeapMonth + 12); return iYearDays; } static int iGetLNewYearOffsetDays(int iYear, int iMonth, int iDay) { int iOffsetDays = 0; int iLeapMonth = iGetLLeapMonth(iYear); if ((iLeapMonth > 0) && (iLeapMonth == iMonth - 12)) { iMonth = iLeapMonth; iOffsetDays += iGetLMonthDays(iYear, iMonth); } for (int i = 1; i < iMonth; i++) { iOffsetDays += iGetLMonthDays(iYear, i); if (i == iLeapMonth) iOffsetDays += iGetLMonthDays(iYear, iLeapMonth + 12); } iOffsetDays += iDay - 1; return iOffsetDays; } }
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这个转换算法好像有一点问题。
比如查询农历2012/01/01的结果是公历2012/01/24
而实际应该是2012/01/23
希望检查一下
[回复]
Hiei
回复:
二月 7th, 2012 at 上午 11:27
是在计算农历2011年12月份的时候多了一天（实际上2011年12月只有29天）
导致从大年三十开始，后面的农机都多了一天
[回复]
iStar
回复:
二月 24th, 2012 at 下午 11:02
又发了一个正确的，可以去看看：http://www.maxhis.info/?p=685 。
[回复]
不知道是哪个地方写错了
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