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计算农历日期函数

 

    最近在网上看到了一个用PLSQL直接从公历来计算农历的过程,发觉很好。一方面可以了解一下怎么计算农历日期的逻辑,另一方面也学习一下这类程序应该怎么写的。不过看作者自己把那么多的字符串接起来也真是不容易啊,佩服一个~

   

 

CREATE TABLE SolarData

(

  YearID  INTEGER NOT NULL ,   -- 农历年

  DATA     CHAR ( 7 ) NOT NULL ,   -- 农历年对应的 16 进制数

  DataInt INTEGER NOT NULL     -- 农历年对应的 10 进制数

);

 

INSERT INTO SolarData VALUES ( 1900 , '0x04bd8' , 19416 );

INSERT INTO SolarData VALUES ( 1901 , '0x04ae0' , 19168 );

INSERT INTO SolarData VALUES ( 1902 , '0x0a570' , 42352 );

INSERT INTO SolarData VALUES ( 1903 , '0x054d5' , 21717 );

INSERT INTO SolarData VALUES ( 1904 , '0x0d260' , 53856 );

INSERT INTO SolarData VALUES ( 1905 , '0x0d950' , 55632 );

INSERT INTO SolarData VALUES ( 1906 , '0x16554' , 91476 );

INSERT INTO SolarData VALUES ( 1907 , '0x056a0' , 22176 );

INSERT INTO SolarData VALUES ( 1908 , '0x09ad0' , 39632 );

INSERT INTO SolarData VALUES ( 1909 , '0x055d2' , 21970 );

INSERT INTO SolarData VALUES ( 1910 , '0x04ae0' , 19168 );

INSERT INTO SolarData VALUES ( 1911 , '0x0a5b6' , 42422 );

INSERT INTO SolarData VALUES ( 1912 , '0x0a4d0' , 42192 );

INSERT INTO SolarData VALUES ( 1913 , '0x0d250' , 53840 );

INSERT INTO SolarData VALUES ( 1914 , '0x1d255' , 119381 );

INSERT INTO SolarData VALUES ( 1915 , '0x0b540' , 46400 );

INSERT INTO SolarData VALUES ( 1916 , '0x0d6a0' , 54944 );

INSERT INTO SolarData VALUES ( 1917 , '0x0ada2' , 44450 );

INSERT INTO SolarData VALUES ( 1918 , '0x095b0' , 38320 );

INSERT INTO SolarData VALUES ( 1919 , '0x14977' , 84343 );

INSERT INTO SolarData VALUES ( 1920 , '0x04970' , 18800 );

INSERT INTO SolarData VALUES ( 1921 , '0x0a4b0' , 42160 );

INSERT INTO SolarData VALUES ( 1922 , '0x0b4b5' , 46261 );

INSERT INTO SolarData VALUES ( 1923 , '0x06a50' , 27216 );

INSERT INTO SolarData VALUES ( 1924 , '0x06d40' , 27968 );

INSERT INTO SolarData VALUES ( 1925 , '0x1ab54' , 109396 );

INSERT INTO SolarData VALUES ( 1926 , '0x02b60' , 11104 );

INSERT INTO SolarData VALUES ( 1927 , '0x09570' , 38256 );

INSERT INTO SolarData VALUES ( 1928 , '0x052f2' , 21234 );

INSERT INTO SolarData VALUES ( 1929 , '0x04970' , 18800 );

INSERT INTO SolarData VALUES ( 1930 , '0x06566' , 25958 );

INSERT INTO SolarData VALUES ( 1931 , '0x0d4a0' , 54432 );

INSERT INTO SolarData VALUES ( 1932 , '0x0ea50' , 59984 );

INSERT INTO SolarData VALUES ( 1933 , '0x06e95' , 28309 );

INSERT INTO SolarData VALUES ( 1934 , '0x05ad0' , 23248 );

INSERT INTO SolarData VALUES ( 1935 , '0x02b60' , 11104 );

INSERT INTO SolarData VALUES ( 1936 , '0x186e3' , 100067 );

INSERT INTO SolarData VALUES ( 1937 , '0x092e0' , 37600 );

INSERT INTO SolarData VALUES ( 1938 , '0x1c8d7' , 116951 );

INSERT INTO SolarData VALUES ( 1939 , '0x0c950' , 51536 );

INSERT INTO SolarData VALUES ( 1940 , '0x0d4a0' , 54432 );

INSERT INTO SolarData VALUES ( 1941 , '0x1d8a6' , 120998 );

INSERT INTO SolarData VALUES ( 1942 , '0x0b550' , 46416 );

INSERT INTO SolarData VALUES ( 1943 , '0x056a0' , 22176 );

INSERT INTO SolarData VALUES ( 1944 , '0x1a5b4' , 107956 );

INSERT INTO SolarData VALUES ( 1945 , '0x025d0' , 9680 );

INSERT INTO SolarData VALUES ( 1946 , '0x092d0' , 37584 );

INSERT INTO SolarData VALUES ( 1947 , '0x0d2b2' , 53938 );

INSERT INTO SolarData VALUES ( 1948 , '0x0a950' , 43344 );

INSERT INTO SolarData VALUES ( 1949 , '0x0b557' , 46423 );

INSERT INTO SolarData VALUES ( 1950 , '0x06ca0' , 27808 );

INSERT INTO SolarData VALUES ( 1951 , '0x0b550' , 46416 );

INSERT INTO SolarData VALUES ( 1952 , '0x15355' , 86869 );

INSERT INTO SolarData VALUES ( 1953 , '0x04da0' , 19872 );

INSERT INTO SolarData VALUES ( 1954 , '0x0a5d0' , 42448 );

INSERT INTO SolarData VALUES ( 1955 , '0x14573' , 83315 );

INSERT INTO SolarData VALUES ( 1956 , '0x052d0' , 21200 );

INSERT INTO SolarData VALUES ( 1957 , '0x0a9a8' , 43432 );

INSERT INTO SolarData VALUES ( 1958 , '0x0e950' , 59728 );

INSERT INTO SolarData VALUES ( 1959 , '0x06aa0' , 27296 );

INSERT INTO SolarData VALUES ( 1960 , '0x0aea6' , 44710 );

INSERT INTO SolarData VALUES ( 1961 , '0x0ab50' , 43856 );

INSERT INTO SolarData VALUES ( 1962 , '0x04b60' , 19296 );

INSERT INTO SolarData VALUES ( 1963 , '0x0aae4' , 43748 );

INSERT INTO SolarData VALUES ( 1964 , '0x0a570' , 42352 );

INSERT INTO SolarData VALUES ( 1965 , '0x05260' , 21088 );

INSERT INTO SolarData VALUES ( 1966 , '0x0f263' , 62051 );

INSERT INTO SolarData VALUES ( 1967 , '0x0d950' , 55632 );

INSERT INTO SolarData VALUES ( 1968 , '0x05b57' , 23383 );

INSERT INTO SolarData VALUES ( 1969 , '0x056a0' , 22176 );

INSERT INTO SolarData VALUES ( 1970 , '0x096d0' , 38608 );

INSERT INTO SolarData VALUES ( 1971 , '0x04dd5' , 19925 );

INSERT INTO SolarData VALUES ( 1972 , '0x04ad0' , 19152 );

INSERT INTO SolarData VALUES ( 1973 , '0x0a4d0' , 42192 );

INSERT INTO SolarData VALUES ( 1974 , '0x0d4d4' , 54484 );

INSERT INTO SolarData VALUES ( 1975 , '0x0d250' , 53840 );

INSERT INTO SolarData VALUES ( 1976 , '0x0d558' , 54616 );

INSERT INTO SolarData VALUES ( 1977 , '0x0b540' , 46400 );

INSERT INTO SolarData VALUES ( 1978 , '0x0b5a0' , 46496 );

INSERT INTO SolarData VALUES ( 1979 , '0x195a6' , 103846 );

INSERT INTO SolarData VALUES ( 1980 , '0x095b0' , 38320 );

INSERT INTO SolarData VALUES ( 1981 , '0x049b0' , 18864 );

INSERT INTO SolarData VALUES ( 1982 , '0x0a974' , 43380 );

INSERT INTO SolarData VALUES ( 1983 , '0x0a4b0' , 42160 );

INSERT INTO SolarData VALUES ( 1984 , '0x0b27a' , 45690 );

INSERT INTO SolarData VALUES ( 1985 , '0x06a50' , 27216 );

INSERT INTO SolarData VALUES ( 1986 , '0x06d40' , 27968 );

INSERT INTO SolarData VALUES ( 1987 , '0x0af46' , 44870 );

INSERT INTO SolarData VALUES ( 1988 , '0x0ab60' , 43872 );

INSERT INTO SolarData VALUES ( 1989 , '0x09570' , 38256 );

INSERT INTO SolarData VALUES ( 1990 , '0x04af5' , 19189 );

INSERT INTO SolarData VALUES ( 1991 , '0x04970' , 18800 );

INSERT INTO SolarData VALUES ( 1992 , '0x064b0' , 25776 );

INSERT INTO SolarData VALUES ( 1993 , '0x074a3' , 29859 );

INSERT INTO SolarData VALUES ( 1994 , '0x0ea50' , 59984 );

INSERT INTO SolarData VALUES ( 1995 , '0x06b58' , 27480 );

INSERT INTO SolarData VALUES ( 1996 , '0x055c0' , 21952 );

INSERT INTO SolarData VALUES ( 1997 , '0x0ab60' , 43872 );

INSERT INTO SolarData VALUES ( 1998 , '0x096d5' , 38613 );

INSERT INTO SolarData VALUES ( 1999 , '0x092e0' , 37600 );

INSERT INTO SolarData VALUES ( 2000 , '0x0c960' , 51552 );

INSERT INTO SolarData VALUES ( 2001 , '0x0d954' , 55636 );

INSERT INTO SolarData VALUES ( 2002 , '0x0d4a0' , 54432 );

INSERT INTO SolarData VALUES ( 2003 , '0x0da50' , 55888 );

INSERT INTO SolarData VALUES ( 2004 , '0x07552' , 30034 );

INSERT INTO SolarData VALUES ( 2005 , '0x056a0' , 22176 );

INSERT INTO SolarData VALUES ( 2006 , '0x0abb7' , 43959 );

INSERT INTO SolarData VALUES ( 2007 , '0x025d0' , 9680 );

INSERT INTO SolarData VALUES ( 2008 , '0x092d0' , 37584 );

INSERT INTO SolarData VALUES ( 2009 , '0x0cab5' , 51893 );

INSERT INTO SolarData VALUES ( 2010 , '0x0a950' , 43344 );

INSERT INTO SolarData VALUES ( 2011 , '0x0b4a0' , 46240 );

INSERT INTO SolarData VALUES ( 2012 , '0x0baa4' , 47780 );

INSERT INTO SolarData VALUES ( 2013 , '0x0ad50' , 44368 );

INSERT INTO SolarData VALUES ( 2014 , '0x055d9' , 21977 );

INSERT INTO SolarData VALUES ( 2015 , '0x04ba0' , 19360 );

INSERT INTO SolarData VALUES ( 2016 , '0x0a5b0' , 42416 );

INSERT INTO SolarData VALUES ( 2017 , '0x15176' , 86390 );

INSERT INTO SolarData VALUES ( 2018 , '0x052b0' , 21168 );

INSERT INTO SolarData VALUES ( 2019 , '0x0a930' , 43312 );

INSERT INTO SolarData VALUES ( 2020 , '0x07954' , 31060 );

INSERT INTO SolarData VALUES ( 2021 , '0x06aa0' , 27296 );

INSERT INTO SolarData VALUES ( 2022 , '0x0ad50' , 44368 );

INSERT INTO SolarData VALUES ( 2023 , '0x05b52' , 23378 );

INSERT INTO SolarData VALUES ( 2024 , '0x04b60' , 19296 );

INSERT INTO SolarData VALUES ( 2025 , '0x0a6e6' , 42726 );

INSERT INTO SolarData VALUES ( 2026 , '0x0a4e0' , 42208 );

INSERT INTO SolarData VALUES ( 2027 , '0x0d260' , 53856 );

INSERT INTO SolarData VALUES ( 2028 , '0x0ea65' , 60005 );

INSERT INTO SolarData VALUES ( 2029 , '0x0d530' , 54576 );

INSERT INTO SolarData VALUES ( 2030 , '0x05aa0' , 23200 );

INSERT INTO SolarData VALUES ( 2031 , '0x076a3' , 30371 );

INSERT INTO SolarData VALUES ( 2032 , '0x096d0' , 38608 );

INSERT INTO SolarData VALUES ( 2033 , '0x04bd7' , 19415 );

INSERT INTO SolarData VALUES ( 2034 , '0x04ad0' , 19152 );

INSERT INTO SolarData VALUES ( 2035 , '0x0a4d0' , 42192 );

INSERT INTO SolarData VALUES ( 2036 , '0x1d0b6' , 118966 );

INSERT INTO SolarData VALUES ( 2037 , '0x0d250' , 53840 );

INSERT INTO SolarData VALUES ( 2038 , '0x0d520' , 54560 );

INSERT INTO SolarData VALUES ( 2039 , '0x0dd45' , 56645 );

INSERT INTO SolarData VALUES ( 2040 , '0x0b5a0' , 46496 );

INSERT INTO SolarData VALUES ( 2041 , '0x056d0' , 22224 );

INSERT INTO SolarData VALUES ( 2042 , '0x055b2' , 21938 );

INSERT INTO SolarData VALUES ( 2043 , '0x049b0' , 18864 );

INSERT INTO SolarData VALUES ( 2044 , '0x0a577' , 42359 );

INSERT INTO SolarData VALUES ( 2045 , '0x0a4b0' , 42160 );

INSERT INTO SolarData VALUES ( 2046 , '0x0aa50' , 43600 );

INSERT INTO SolarData VALUES ( 2047 , '0x1b255' , 111189 );

INSERT INTO SolarData VALUES ( 2048 , '0x06d20' , 27936 );

INSERT INTO SolarData VALUES ( 2049 , '0x0ada0' , 44448 );

COMMIT ;

 

CREATE OR REPLACE FUNCTION f_GetLunar(i_SolarDay DATE )

RETURN VARCHAR2

  -- 功能:计算阳历 1900/01/31 - 2050/01/22 间某一天对应的阴历是多少

  -- 算法:在一张表中用 10 进制格式保存某个农历年每月大小 , 有无闰月 , 闰月大小信息

  --           1. 12 2 进制位来表示某个农历年每月的大小,大月记为 1 ,否则为 0

  --           2. 用低 4 位来表示闰月的月份,没有闰月记为 0

  --           3. 用一个高位表示闰月的大小,闰月大记为 0 ,闰月小或无闰月记为 0

  --           4. 再将该 2 进制数转化为 10 进制,存入表中

  --       农历 2000 : 0 110010010110 0000 -> 0x0c960 -> 51552

  --       农历 2001 : 0 110110010101 0100 -> 0x0d954 -> 55636

  --       采用查表的方式计算出农历日期

  -- 作者: Angel_XJW 

  -- 修改: 1.

  --     2.

AS

  v_OffSet         INT ;

  v_Lunar          INT ;          -- 农历年是否含闰月 , 几月是闰月 , 闰月天数 , 其它月天数

  v_YearDays       INT ;          -- 农历年所含天数

  v_MonthDays      INT ;          -- 农历月所含天数

  v_LeapMonthDays  INT ;          -- 农历闰月所含天数

  v_LeapMonth      INT ;          -- 农历年闰哪个月 1-12 , 没闰传回 0

  v_LeapFlag       INT ;          -- 某农历月是否为闰月   1:   0: 不是

  v_MonthNo        INT ;          -- 某农历月所对应的 2 进制数 如农历 3 : 001000000000

  i                INT ;

  j                INT ;

  k                INT ;

 

  v_Year           INT ;          -- i_SolarDay 对应的农历年

  v_Month          INT ;          -- i_SolarDay 对应的农历月

  v_Day            INT ;          -- i_SolarDay 对应的农历日

 

  o_OutputDate     VARCHAR2 ( 25 ); -- 返回值   格式:农历 **** **( ) **

 

  e_ErrMsg         VARCHAR2 ( 200 );

  e_ErrDate        EXCEPTION ;

BEGIN

 

   -- 输入参数判断

   IF i_SolarDay<TO_DATE( '1900-01-31' , 'YYYY-MM-DD' ) OR i_SolarDay>=TO_DATE( '2050-01-23' , 'YYYY-MM-DD' ) THEN

     RAISE e_ErrDate;

   END IF ;

 

  -- i_SolarDay 1900-01-30( 即农历 1900-01-01 的前一天 ) 的天数

  v_OffSet := TRUNC(i_SolarDay, 'DD' ) - TO_DATE( '1900-01-30' , 'YYYY-MM-DD' );

 

  -- 确定农历年开始

  i := 1900 ;

  WHILE i < 2050 AND v_OffSet > 0 LOOP

    v_YearDays := 348 ;    --  29*12 以每年 12 个农历月 , 每个农历月含 29 个农历日为基数

    v_LeapMonthDays := 0 ;

   

    -- 取出农历年是否含闰月 , 几月是闰月 , 闰月天数 , 其它月天数

    -- 如农历 2001 : 0x0d954(16 进制 ) -> 55636(10 进制 ) -> 0 110110010101 0100(2 进制 )

    -- 1,2,4,5,8,10,12 月大 , 3,6,7,9,11 月小 , 4 月为闰月,闰月小

    SELECT DataInt INTO v_Lunar FROM SolarData WHERE YearId = i;

 

    -- 传回农历年的总天数

    j := 32768 ;            --   100000000000 0000 -> 32768

                           -- 0 110110010101 0100 -> 55636( 农历 2001 )

    -- 依次判断 v_Lunar 年个月是否为大月,是则加一天

    WHILE j > 8 LOOP        -- 闰月另行判断 8 -> 0 000000000000 1000   

      IF BITAND(v_Lunar, j) + 0 > 0 then

        v_YearDays := v_YearDays + 1 ;

      END IF ;

      j := j/ 2 ;            -- 判断下一个月是否为大

    END LOOP ;

 

    -- 传回农历年闰哪个月 1-12 , 没闰传回 0   15 -> 1 0000

    v_LeapMonth := BITAND(v_Lunar, 15 ) + 0 ;

 

    -- 传回农历年闰月的天数 , 加在年的总天数上

    IF v_LeapMonth > 0 THEN

      -- 判断闰月大小 65536 -> 1 000000000000 0000

      IF BITAND(v_Lunar, 65536 )+ 0 > 0 THEN

        v_LeapMonthDays := 30 ;

      ELSE

        v_LeapMonthDays := 29 ;

      END IF ;

      v_YearDays := v_YearDays + v_LeapMonthDays;

    END IF ;

 

    v_OffSet := v_OffSet - v_YearDays;

    i := i + 1 ;

  END LOOP ;

 

  IF v_OffSet <= 0 THEN

    -- i_SolarDay 在所属农历年 ( i ) 中的第 v_OffSet

    v_OffSet := v_OffSet + v_YearDays; 

    i := i - 1 ;

  END IF ;

  -- 确定农历年结束

  v_Year := i;

 

  -- 确定农历月开始

  i := 1 ;

  SELECT DataInt INTO v_Lunar FROM SolarData WHERE YearId = v_Year;

 

  -- 判断那个月是润月

  -- 如农历 2001 (55636,15 -> 0 1101100101010100, 1111 -> 4) 即润 4 , 且闰月小

  v_LeapMonth := BITAND(v_Lunar, 15 ) + 0 ;

  v_LeapFlag := 0 ;

 

  WHILE i < 13 AND v_OffSet > 0 LOOP

    -- 判断是否为闰月

    v_MonthDays := 0 ;

    IF (v_LeapMonth > 0 AND i = (v_LeapMonth + 1 ) AND v_LeapFlag = 0 ) THEN

      -- 是闰月

      i := i - 1 ;

      k := i;                -- 保存是闰月的时 i 的值

      v_LeapFlag := 1 ;

      -- 传回农历年闰月的天数

      IF BITAND(v_Lunar, 65536 )+ 0 > 0 THEN

        v_MonthDays := 30 ;

      ELSE

        v_MonthDays := 29 ;

      END IF ;

     

    ELSE

      -- 不是闰月

      j := 1 ;

      v_MonthNo := 65536 ;

      -- 计算 i 月对应的 2 进制数 如农历 3 : 001000000000

      WHILE j<= i LOOP

        v_MonthNo := v_MonthNo/ 2 ;

        j := j + 1 ;

      END LOOP ;

      -- 计算农历 v_Year i 月的天数

      IF BITAND(v_Lunar, v_MonthNo)+ 0 > 0 THEN

        v_MonthDays := 30 ;

      ELSE

        v_MonthDays := 29 ;

      END IF ;

    END IF ;

 

    -- 解除闰月

    IF v_LeapFlag = 1 AND i = v_LeapMonth + 1 THEN

      v_LeapFlag := 0 ;

    END IF ;

    v_OffSet := v_OffSet - v_MonthDays;

    i := i + 1 ;

  END LOOP ;

 

  IF v_OffSet <= 0 THEN

    -- i_SolarDay 在所属农历月 ( i ) 中的第 v_OffSet

    v_OffSet := v_OffSet + v_MonthDays;

    i := i - 1 ;

  END IF ;

 

  -- 确定农历月结束

  v_Month := i;

 

  -- 确定农历日结束

  v_Day := v_OffSet;

 

  -- 格式化返回值

  o_OutputDate := ' 农历 ' ||TO_CHAR(v_Year)|| ' ' ;

  IF k = i THEN

     o_OutputDate := o_OutputDate || LPAD(TO_CHAR(v_Month), 2 , '0' )|| '( ) ' ;

  ELSE

     o_OutputDate := o_OutputDate || LPAD(TO_CHAR(v_Month), 2 , '0' )|| ' ' ;

  END IF ;

  o_OutputDate := o_OutputDate || LPAD(TO_CHAR(v_Day), 2 , '0' )|| ' ' ;

 

  RETURN o_OutputDate;

 

EXCEPTION

  WHEN e_Errdate THEN

    RETURN ' 日期错误 ! 有效范围 ( 阳历 ): 1900/01/31 - 2050/01/22' ;

  WHEN OTHERS THEN

    e_ErrMsg :=SUBSTR( SQLERRM , 1 , 200 );

    RETURN e_ErrMsg;

END ;

/

 

posted on 2008-10-31 20:58 decode360 阅读(846) 评论(0)  编辑  收藏 所属分类: 06.PLSQL

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