1. /**
    2.  * 农历工具类
    3.  *     author: imaz
    4.  *     time  : 2020/03/03
    5.  *     desc  : 日历相关工具类
    6.  */
    7. public final class LunarUtils {
    9.     private LunarUtils() {
    10.         throw new UnsupportedOperationException("u can't instantiate me...");
    11.     }
    13.     /*
    14.      * |----4位闰月|-------------13位1为30天，0为29天|
    15.      */
    16.     private static final int[] LUNAR_MONTH_DAYS = {1887, 0x1694, 0x16aa, 0x4ad5, 0xab6, 0xc4b7, 0x4ae, 0xa56, 0xb52a, 0x1d2a,
    17.             0xd54, 0x75aa, 0x156a, 0x1096d, 0x95c, 0x14ae, 0xaa4d, 0x1a4c, 0x1b2a, 0x8d55, 0xad4, 0x135a, 0x495d, 0x95c,
    18.             0xd49b, 0x149a, 0x1a4a, 0xbaa5, 0x16a8, 0x1ad4, 0x52da, 0x12b6, 0xe937, 0x92e, 0x1496, 0xb64b, 0xd4a, 0xda8,
    19.             0x95b5, 0x56c, 0x12ae, 0x492f, 0x92e, 0xcc96, 0x1a94, 0x1d4a, 0xada9, 0xb5a, 0x56c, 0x726e, 0x125c, 0xf92d,
    20.             0x192a, 0x1a94, 0xdb4a, 0x16aa, 0xad4, 0x955b, 0x4ba, 0x125a, 0x592b, 0x152a, 0xf695, 0xd94, 0x16aa, 0xaab5,
    21.             0x9b4, 0x14b6, 0x6a57, 0xa56, 0x1152a, 0x1d2a, 0xd54, 0xd5aa, 0x156a, 0x96c, 0x94ae, 0x14ae, 0xa4c, 0x7d26,
    22.             0x1b2a, 0xeb55, 0xad4, 0x12da, 0xa95d, 0x95a, 0x149a, 0x9a4d, 0x1a4a, 0x11aa5, 0x16a8, 0x16d4, 0xd2da,
    23.             0x12b6, 0x936, 0x9497, 0x1496, 0x1564b, 0xd4a, 0xda8, 0xd5b4, 0x156c, 0x12ae, 0xa92f, 0x92e, 0xc96, 0x6d4a,
    24.             0x1d4a, 0x10d65, 0xb58, 0x156c, 0xb26d, 0x125c, 0x192c, 0x9a95, 0x1a94, 0x1b4a, 0x4b55, 0xad4, 0xf55b,
    25.             0x4ba, 0x125a, 0xb92b, 0x152a, 0x1694, 0x96aa, 0x15aa, 0x12ab5, 0x974, 0x14b6, 0xca57, 0xa56, 0x1526,
    26.             0x8e95, 0xd54, 0x15aa, 0x49b5, 0x96c, 0xd4ae, 0x149c, 0x1a4c, 0xbd26, 0x1aa6, 0xb54, 0x6d6a, 0x12da,
    27.             0x1695d, 0x95a, 0x149a, 0xda4b, 0x1a4a, 0x1aa4, 0xbb54, 0x16b4, 0xada, 0x495b, 0x936, 0xf497, 0x1496,
    28.             0x154a, 0xb6a5, 0xda4, 0x15b4, 0x6ab6, 0x126e, 0x1092f, 0x92e, 0xc96, 0xcd4a, 0x1d4a, 0xd64, 0x956c, 0x155c,
    29.             0x125c, 0x792e, 0x192c, 0xfa95, 0x1a94, 0x1b4a, 0xab55, 0xad4, 0x14da, 0x8a5d, 0xa5a, 0x1152b, 0x152a,
    30.             0x1694, 0xd6aa, 0x15aa, 0xab4, 0x94ba, 0x14b6, 0xa56, 0x7527, 0xd26, 0xee53, 0xd54, 0x15aa, 0xa9b5, 0x96c,
    31.             0x14ae, 0x8a4e, 0x1a4c, 0x11d26, 0x1aa4, 0x1b54, 0xcd6a, 0xada, 0x95c, 0x949d, 0x149a, 0x1a2a, 0x5b25,
    32.             0x1aa4, 0xfb52, 0x16b4, 0xaba, 0xa95b, 0x936, 0x1496, 0x9a4b, 0x154a, 0x136a5, 0xda4, 0x15ac};
    34.     private static final int[] SOLAR_1_1 = {1887, 0xec04c, 0xec23f, 0xec435, 0xec649, 0xec83e, 0xeca51, 0xecc46, 0xece3a,
    35.             0xed04d, 0xed242, 0xed436, 0xed64a, 0xed83f, 0xeda53, 0xedc48, 0xede3d, 0xee050, 0xee244, 0xee439, 0xee64d,
    36.             0xee842, 0xeea36, 0xeec4a, 0xeee3e, 0xef052, 0xef246, 0xef43a, 0xef64e, 0xef843, 0xefa37, 0xefc4b, 0xefe41,
    37.             0xf0054, 0xf0248, 0xf043c, 0xf0650, 0xf0845, 0xf0a38, 0xf0c4d, 0xf0e42, 0xf1037, 0xf124a, 0xf143e, 0xf1651,
    38.             0xf1846, 0xf1a3a, 0xf1c4e, 0xf1e44, 0xf2038, 0xf224b, 0xf243f, 0xf2653, 0xf2848, 0xf2a3b, 0xf2c4f, 0xf2e45,
    39.             0xf3039, 0xf324d, 0xf3442, 0xf3636, 0xf384a, 0xf3a3d, 0xf3c51, 0xf3e46, 0xf403b, 0xf424e, 0xf4443, 0xf4638,
    40.             0xf484c, 0xf4a3f, 0xf4c52, 0xf4e48, 0xf503c, 0xf524f, 0xf5445, 0xf5639, 0xf584d, 0xf5a42, 0xf5c35, 0xf5e49,
    41.             0xf603e, 0xf6251, 0xf6446, 0xf663b, 0xf684f, 0xf6a43, 0xf6c37, 0xf6e4b, 0xf703f, 0xf7252, 0xf7447, 0xf763c,
    42.             0xf7850, 0xf7a45, 0xf7c39, 0xf7e4d, 0xf8042, 0xf8254, 0xf8449, 0xf863d, 0xf8851, 0xf8a46, 0xf8c3b, 0xf8e4f,
    43.             0xf9044, 0xf9237, 0xf944a, 0xf963f, 0xf9853, 0xf9a47, 0xf9c3c, 0xf9e50, 0xfa045, 0xfa238, 0xfa44c, 0xfa641,
    44.             0xfa836, 0xfaa49, 0xfac3d, 0xfae52, 0xfb047, 0xfb23a, 0xfb44e, 0xfb643, 0xfb837, 0xfba4a, 0xfbc3f, 0xfbe53,
    45.             0xfc048, 0xfc23c, 0xfc450, 0xfc645, 0xfc839, 0xfca4c, 0xfcc41, 0xfce36, 0xfd04a, 0xfd23d, 0xfd451, 0xfd646,
    46.             0xfd83a, 0xfda4d, 0xfdc43, 0xfde37, 0xfe04b, 0xfe23f, 0xfe453, 0xfe648, 0xfe83c, 0xfea4f, 0xfec44, 0xfee38,
    47.             0xff04c, 0xff241, 0xff436, 0xff64a, 0xff83e, 0xffa51, 0xffc46, 0xffe3a, 0x10004e, 0x100242, 0x100437,
    48.             0x10064b, 0x100841, 0x100a53, 0x100c48, 0x100e3c, 0x10104f, 0x101244, 0x101438, 0x10164c, 0x101842,
    49.             0x101a35, 0x101c49, 0x101e3d, 0x102051, 0x102245, 0x10243a, 0x10264e, 0x102843, 0x102a37, 0x102c4b,
    50.             0x102e3f, 0x103053, 0x103247, 0x10343b, 0x10364f, 0x103845, 0x103a38, 0x103c4c, 0x103e42, 0x104036,
    51.             0x104249, 0x10443d, 0x104651, 0x104846, 0x104a3a, 0x104c4e, 0x104e43, 0x105038, 0x10524a, 0x10543e,
    52.             0x105652, 0x105847, 0x105a3b, 0x105c4f, 0x105e45, 0x106039, 0x10624c, 0x106441, 0x106635, 0x106849,
    53.             0x106a3d, 0x106c51, 0x106e47, 0x10703c, 0x10724f, 0x107444, 0x107638, 0x10784c, 0x107a3f, 0x107c53,
    54.             0x107e48};
    56.     private static int getBitInt(final int data, final int length, final int shift) {
    57.         return (data & (((1 << length) - 1) << shift)) >> shift;
    58.     }
    61.     /**
    62.      * 农历年转干支年
    63.      *
    64.      * @param lunarYear 农历年份
    65.      * @return 干支年
    66.      */
    67.     public static String lunarYear2GanZhi(final int lunarYear) {
    68.         final String[] tianGan = {"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};
    69.         final String[] diZhi = {"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
    70.         return tianGan[(lunarYear - 4) % 10] + diZhi[(lunarYear - 4) % 12] + "年";
    71.     }
    73.     /**
    74.      * 农历转公历
    75.      *
    76.      * @param lunar 农历
    77.      * @return 公历
    78.      */
    79.     public static Solar lunar2Solar(final Lunar lunar) {
    80.         int days = LUNAR_MONTH_DAYS[lunar.lunarYear - LUNAR_MONTH_DAYS[0]];
    81.         int leap = getBitInt(days, 4, 13);
    82.         int offset = 0;
    83.         int loopend = leap;
    84.         if (!lunar.isLeap) {
    85.             if (lunar.lunarMonth <= leap || leap == 0) {
    86.                 loopend = lunar.lunarMonth - 1;
    87.             } else {
    88.                 loopend = lunar.lunarMonth;
    89.             }
    90.         }
    91.         for (int i = 0; i < loopend; i++) {
    92.             offset += getBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
    93.         }
    94.         offset += lunar.lunarDay;
    96.         int solar11 = SOLAR_1_1[lunar.lunarYear - SOLAR_1_1[0]];
    98.         int y = getBitInt(solar11, 12, 9);
    99.         int m = getBitInt(solar11, 4, 5);
    100.         int d = getBitInt(solar11, 5, 0);
    102.         return solarFromInt(solarToInt(y, m, d) + offset - 1);
    103.     }
    105.     /**
    106.      * 公历转农历
    107.      *
    108.      * @param solar 公历
    109.      * @return 阴历
    110.      */
    111.     public static Lunar solar2Lunar(final Solar solar) {
    112.         Lunar lunar = new Lunar();
    113.         int index = solar.solarYear - SOLAR_1_1[0];
    114.         int data = (solar.solarYear << 9) | (solar.solarMonth << 5) | (solar.solarDay);
    115.         int solar11 = 0;
    116.         if (SOLAR_1_1[index] > data) {
    117.             index--;
    118.         }
    119.         solar11 = SOLAR_1_1[index];
    120.         int y = getBitInt(solar11, 12, 9);
    121.         int m = getBitInt(solar11, 4, 5);
    122.         int d = getBitInt(solar11, 5, 0);
    123.         long offset = solarToInt(solar.solarYear, solar.solarMonth, solar.solarDay) - solarToInt(y, m, d);
    125.         int days = LUNAR_MONTH_DAYS[index];
    126.         int leap = getBitInt(days, 4, 13);
    128.         int lunarY = index + SOLAR_1_1[0];
    129.         int lunarM = 1;
    130.         int lunarD = 1;
    131.         offset += 1;
    133.         for (int i = 0; i < 13; i++) {
    134.             int dm = getBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
    135.             if (offset > dm) {
    136.                 lunarM++;
    137.                 offset -= dm;
    138.             } else {
    139.                 break;
    140.             }
    141.         }
    142.         lunarD = (int) (offset);
    143.         lunar.lunarYear = lunarY;
    144.         lunar.lunarMonth = lunarM;
    145.         lunar.isLeap = false;
    146.         if (leap != 0 && lunarM > leap) {
    147.             lunar.lunarMonth = lunarM - 1;
    148.             if (lunarM == leap + 1) {
    149.                 lunar.isLeap = true;
    150.             }
    151.         }
    152.         lunar.lunarDay = lunarD;
    153.         return lunar;
    154.     }
    156.     private static Solar solarFromInt(final long g) {
    157.         long y = (10000 * g + 14780) / 3652425;
    158.         long ddd = g - (365 * y + y / 4 - y / 100 + y / 400);
    159.         if (ddd < 0) {
    160.             y--;
    161.             ddd = g - (365 * y + y / 4 - y / 100 + y / 400);
    162.         }
    163.         long mi = (100 * ddd + 52) / 3060;
    164.         long mm = (mi + 2) % 12 + 1;
    165.         y = y + (mi + 2) / 12;
    166.         long dd = ddd - (mi * 306 + 5) / 10 + 1;
    167.         Solar solar = new Solar();
    168.         solar.solarYear = (int) y;
    169.         solar.solarMonth = (int) mm;
    170.         solar.solarDay = (int) dd;
    171.         return solar;
    172.     }
    174.     private static long solarToInt(int y, int m, final int d) {
    175.         m = (m + 9) % 12;
    176.         y = y - m / 10;
    177.         return 365 * y + y / 4 - y / 100 + y / 400 + (m * 306 + 5) / 10 + (d - 1);
    178.     }
    180.     public static class Lunar {
    182.         public int     lunarYear;
    183.         public int     lunarMonth;
    184.         public int     lunarDay;
    185.         public boolean isLeap;
    187.         Lunar() {
    188.         }
    190.         public Lunar(int lunarYear, int lunarMonth, int lunarDay, boolean isLeap) {
    191.             this.lunarYear = lunarYear;
    192.             this.lunarMonth = lunarMonth;
    193.             this.lunarDay = lunarDay;
    194.             this.isLeap = isLeap;
    195.         }
    197.         @Override
    198.         public String toString() {
    199.             return "" + lunarYear + ", " + lunarMonth + ", " + lunarDay + ", " + isLeap;
    200.         }
    201.     }
    203.     public static class Solar {
    205.         public int solarYear;
    206.         public int solarMonth;
    207.         public int solarDay;
    209.         Solar() {
    210.         }
    212.         public Solar(int solarYear, int solarMonth, int solarDay) {
    213.             this.solarYear = solarYear;
    214.             this.solarMonth = solarMonth;
    215.             this.solarDay = solarDay;
    216.         }
    218.         @Override
    219.         public String toString() {
    220.             return "" + solarYear + ", " + solarMonth + ", " + solarDay;
    221.         }
    222.     }
    223. }