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1
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+/**
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2
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+ * 农历的工具类
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3
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+ */
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4
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+class LunarCalendarUtil {
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5
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+ /**
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6
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+ * 支持转换的最小农历年份
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7
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+ */
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8
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+ static final int MIN_YEAR = 1900;
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9
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+
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10
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+ /**
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11
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+ * 支持转换的最大农历年份
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12
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+ */
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13
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+ static final int MAX_YEAR = 2099;
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14
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+ /**
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15
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+ * 公历每月前的天数
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16
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+ */
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17
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+ static final List<int> DAYS_BEFORE_MONTH = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365];
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18
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+
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19
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+ /**
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20
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+ * 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：
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21
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+ * 1. 前4位表示该年闰哪个月；
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22
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+ * 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；
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23
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+ * 3. 最后7位表示农历年首（正月初一）对应的公历日期。
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24
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+ * 以2014年的数据0x955ABF为例说明：
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25
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+ * 1001 0101 0101 1010 1011 1111
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26
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+ * 闰九月 农历正月初一对应公历1月31号
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27
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+ */
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28
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+ static final List<int> LUNAR_INFO = [
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29
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+ /*1900*/
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30
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+ 0x84B6BF,
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31
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+ /*1901-1910*/
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32
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+ 0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A,
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33
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+ /*1911-1920*/
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34
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+ 0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754,
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35
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+ /*1921-1930*/
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36
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+ 0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E,
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37
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+ /*1931-1940*/
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38
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+ 0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48,
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39
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+ /*1941-1950*/
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40
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+ 0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51,
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41
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+ /*1951-1960*/
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42
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+ 0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x6AD53C,
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43
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+ /*1961-1970*/
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44
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+ 0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46,
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45
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+ /*1971-1980*/
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46
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+ 0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50,
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47
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+ /*1981-1990*/
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48
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+ 0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x095746, 0x5497BB,
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49
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+ /*1991-2000*/
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50
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+ 0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645,
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51
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+ /*2001-2010*/
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52
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+ 0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E,
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53
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+ /*2011-2020*/
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54
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+ 0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9,
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55
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+ /*2021-2030*/
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56
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+ 0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x6a573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43,
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57
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+ /*2031-2040*/
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58
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+ 0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C,
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59
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+ /*2041-2050*/
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60
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+ 0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37,
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61
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+ /*2051-2060*/
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62
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+ 0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06AA44, 0x4AB638, 0x0AAE4C, 0x092E42,
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63
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+ /*2061-2070*/
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64
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+ 0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B,
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65
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+ /*2071-2080*/
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66
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+ 0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6,
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67
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+ /*2081-2090*/
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68
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+ 0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E,
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69
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+ /*2091-2099*/
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70
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+ 0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5
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71
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+ ];
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72
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+
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73
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+ /**
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74
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+ * 将农历日期转换为公历日期
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75
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+ * @param year 农历年份
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76
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+ * @param month 农历月
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77
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+ * @param monthDay 农历日
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78
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+ * @param isLeapMonth 该月是否是闰月(该参数可以根据本类中leapMonth()方法，先判断一下要查询的年份是否有闰月，并且闰的几月)
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79
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+ * @return 返回农历日期对应的公历日期，year0, month1, day2.
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80
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+ */
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81
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+ static List<int> lunarToSolar(int year, int month, int monthDay, bool isLeapMonth) {
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82
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+ int dayOffset;
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83
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+ int leapMonth;
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84
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+ int i;
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85
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+ if (year < MIN_YEAR || year > MAX_YEAR || month < 1 || month > 12
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86
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+ || monthDay < 1 || monthDay > 30) {
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87
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+ throw new Exception(
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88
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+ "Illegal lunar date, must be like that:\n\t" +
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89
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+ "year : 1900~2099\n\t" +
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90
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+ "month : 1~12\n\t" +
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91
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+ "day : 1~30");
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92
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+ }
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93
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+ dayOffset = (LUNAR_INFO[year - MIN_YEAR] & 0x001F) - 1;
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94
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+ if (((LUNAR_INFO[year - MIN_YEAR] & 0x0060) >> 5) == 2) {
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95
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+ dayOffset += 31;
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96
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+ }
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97
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+ for (i = 1; i < month; i++) {
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98
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+ if ((LUNAR_INFO[year - MIN_YEAR] & (0x80000 >> (i - 1))) == 0) {
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99
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+ dayOffset += 29;
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100
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+ } else {
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101
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+ dayOffset += 30;
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102
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+ }
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103
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+ }
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104
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+ dayOffset += monthDay;
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105
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+ leapMonth = (LUNAR_INFO[year - MIN_YEAR] & 0xf00000) >> 20;
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106
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+ // 这一年有闰月
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107
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+ if (leapMonth != 0) {
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108
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+ if (month > leapMonth || (month == leapMonth && isLeapMonth)) {
|
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|
109
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+ if ((LUNAR_INFO[year - MIN_YEAR] & (0x80000 >> (month - 1))) == 0) {
|
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|
110
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+ dayOffset += 29;
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111
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+ } else {
|
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112
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+ dayOffset += 30;
|
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113
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+ }
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|
114
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+ }
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|
115
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+ }
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|
116
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+ if (dayOffset > 366 || (year % 4 != 0 && dayOffset > 365)) {
|
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|
117
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+ year += 1;
|
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118
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+ if (year % 4 == 1) {
|
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|
119
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+ dayOffset -= 366;
|
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|
120
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+ } else {
|
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121
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+ dayOffset -= 365;
|
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|
122
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+ }
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|
|
123
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+ }
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124
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+ List<int> solarInfo = new List(3);
|
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|
125
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+ for (i = 1; i < 13; i++) {
|
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126
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+ int iPos = DAYS_BEFORE_MONTH[i];
|
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|
127
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+ if (year % 4 == 0 && i > 2) {
|
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|
|
128
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+ iPos += 1;
|
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|
129
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+ }
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|
130
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+ if (year % 4 == 0 && i == 2 && iPos + 1 == dayOffset) {
|
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131
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+ solarInfo[1] = i;
|
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132
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+ solarInfo[2] = dayOffset - 31;
|
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|
133
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+ break;
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|
134
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+ }
|
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|
|
135
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+ if (iPos >= dayOffset) {
|
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|
136
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+ solarInfo[1] = i;
|
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|
|
137
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+ iPos = DAYS_BEFORE_MONTH[i - 1];
|
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|
|
138
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+ if (year % 4 == 0 && i > 2) {
|
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|
139
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+ iPos += 1;
|
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|
|
140
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+ }
|
|
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|
141
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+ if (dayOffset > iPos) {
|
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|
142
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+ solarInfo[2] = dayOffset - iPos;
|
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|
|
143
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+ } else if (dayOffset == iPos) {
|
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|
|
144
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+ if (year % 4 == 0 && i == 2) {
|
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|
145
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+ solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1] + 1;
|
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|
|
146
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+ } else {
|
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|
|
147
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+ solarInfo[2] = DAYS_BEFORE_MONTH[i] - DAYS_BEFORE_MONTH[i - 1];
|
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|
148
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+ }
|
|
|
|
149
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+ } else {
|
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|
|
150
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+ solarInfo[2] = dayOffset;
|
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|
|
151
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+ }
|
|
|
|
152
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+ break;
|
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|
153
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+ }
|
|
|
|
154
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+ }
|
|
|
|
155
|
+ solarInfo[0] = year;
|
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|
156
|
+ return solarInfo;
|
|
|
|
157
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+ }
|
|
|
|
158
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+
|
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|
159
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+ /**
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|
|
|
160
|
+ * 传回农历year年month月的总天数
|
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|
161
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+ *
|
|
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|
162
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+ * @param year 要计算的年份
|
|
|
|
163
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+ * @param month 要计算的月
|
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|
164
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+ * @return 传回天数
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165
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+ */
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166
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+ static int daysInMonth(int year, int month) {
|
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|
167
|
+ return daysInMontaThree(year, month, false);
|
|
|
|
168
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+ }
|
|
|
|
169
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+
|
|
|
|
170
|
+ /**
|
|
|
|
171
|
+ * 传回农历year年month月的总天数
|
|
|
|
172
|
+ *
|
|
|
|
173
|
+ * @param year 要计算的年份
|
|
|
|
174
|
+ * @param month 要计算的月
|
|
|
|
175
|
+ * @param leap 当月是否是闰月
|
|
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|
176
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+ * @return 传回天数，如果闰月是错误的，返回0.
|
|
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|
177
|
+ */
|
|
|
|
178
|
+ static int daysInMontaThree(int year, int month, bool leap) {
|
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|
|
179
|
+ int mLeapMonth = leapMonth(year);
|
|
|
|
180
|
+ int offset = 0;
|
|
|
|
181
|
+ // 如果本年有闰月且month大于闰月时，需要校正
|
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|
|
182
|
+ if (leapMonth != 0 && month > mLeapMonth) {
|
|
|
|
183
|
+ offset = 1;
|
|
|
|
184
|
+ }
|
|
|
|
185
|
+ // 不考虑闰月
|
|
|
|
186
|
+ if (!leap) {
|
|
|
|
187
|
+ return daysInLunarMonth(year, month + offset);
|
|
|
|
188
|
+ } else {
|
|
|
|
189
|
+ // 传入的闰月是正确的月份
|
|
|
|
190
|
+ if (leapMonth != 0 && leapMonth == month) {
|
|
|
|
191
|
+ return daysInLunarMonth(year, month + 1);
|
|
|
|
192
|
+ }
|
|
|
|
193
|
+ }
|
|
|
|
194
|
+ return 0;
|
|
|
|
195
|
+ }
|
|
|
|
196
|
+
|
|
|
|
197
|
+ /**
|
|
|
|
198
|
+ * 传回农历 year年的总天数
|
|
|
|
199
|
+ *
|
|
|
|
200
|
+ * @param year 将要计算的年份
|
|
|
|
201
|
+ * @return 返回传入年份的总天数
|
|
|
|
202
|
+ */
|
|
|
|
203
|
+ static int daysInLunarYear(int year) {
|
|
|
|
204
|
+ int i, sum = 348;
|
|
|
|
205
|
+ if (leapMonth(year) != 0) {
|
|
|
|
206
|
+ sum = 377;
|
|
|
|
207
|
+ }
|
|
|
|
208
|
+ int monthInfo = LUNAR_INFO[year - MIN_YEAR] & 0x0FFF80;
|
|
|
|
209
|
+ for (i = 0x80000; i > 0x7; i >>= 1) {
|
|
|
|
210
|
+ if ((monthInfo & i) != 0) {
|
|
|
|
211
|
+ sum += 1;
|
|
|
|
212
|
+ }
|
|
|
|
213
|
+ }
|
|
|
|
214
|
+ return sum;
|
|
|
|
215
|
+ }
|
|
|
|
216
|
+
|
|
|
|
217
|
+ /**
|
|
|
|
218
|
+ * 传回农历 year年month月的总天数，总共有13个月包括闰月
|
|
|
|
219
|
+ *
|
|
|
|
220
|
+ * @param year 将要计算的年份
|
|
|
|
221
|
+ * @param month 将要计算的月份
|
|
|
|
222
|
+ * @return 传回农历 year年month月的总天数
|
|
|
|
223
|
+ */
|
|
|
|
224
|
+ static int daysInLunarMonth(int year, int month) {
|
|
|
|
225
|
+ if ((LUNAR_INFO[year - MIN_YEAR] & (0x100000 >> month)) == 0) {
|
|
|
|
226
|
+ return 29;
|
|
|
|
227
|
+ } else {
|
|
|
|
228
|
+ return 30;
|
|
|
|
229
|
+ }
|
|
|
|
230
|
+ }
|
|
|
|
231
|
+
|
|
|
|
232
|
+ /**
|
|
|
|
233
|
+ * 传回农历 year年闰哪个月 1-12 , 没闰传回 0
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|
|
|
234
|
+ * @param year 将要计算的年份
|
|
|
|
235
|
+ * @return 传回农历 year年闰哪个月1-12, 没闰传回 0
|
|
|
|
236
|
+ */
|
|
|
|
237
|
+ static int leapMonth(int year) {
|
|
|
|
238
|
+ return ((LUNAR_INFO[year - MIN_YEAR] & 0xF00000)) >> 20;
|
|
|
|
239
|
+ }
|
|
|
|
240
|
+} |
