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Delphi XE5实现的一个阳历转换成阴历的代码

作者:admin 来源: 日期:2015/4/16 15:47:18 人气: 标签:

介绍

本文章介绍了Delphi XE5实现的一个阳历转换成阴历的代码,该代码只是将阳历转换成了阴历,并不能将阴历转换成阳历,所以代码比较简单,该代码包含了一个DataCN单元,这个单元中实现了阳历转换成阴历的功能,该单元里包含了3个函数
  function CnMonthOfDate(Date: TDate): String;//指定日期的农历月
  function CnDayOfDate(Date: TDate): String;//指定日期的农历日
  function CnDateOfDateStr(Date: TDate): String;//指定日期的农历日期

showmessage(CnDateOfDateStr(Now));

最后一个函数是将指定的日期转换成阴历字符串。

 

 

//DateCn.pas

unit DateCn;

 

interface

 

uses Windows, SysUtils, Controls;

 

const

  //农历月份数据,每年4字节,从1901年开始,共150年

  //数据来源:UCDOS 6.0 UCT.COM

  //分析整理:Copyright (c) 1996-1998, Randolph

  //数据解析:

  //如果第一字节的bit7为1,则该年1月1日位于农历12月,否则位于11月

  //第一字节去除bit7为该年1月1日的农历日期

  //        第二字节                第三字节

  //bit:    7  6  5  4  3  2  1  0  7  6  5  4  3  2  1  0

  //农历月份:16 15 14 13 12 11 10 9  8  7  6  5  4  3  2  1

  //农历月份指的是从该年1月1日的农历月份算起的顺序号

  //农历月份对应的bit为1则该月为30日,否则为29日

  //第四字节为闰月月份

  CnData: array[0..599] of Byte = (

    $0b,$52,$ba,$00,$16,$a9,$5d,$00,$83,$a9,$37,$05,$0e,$74,$9b,$00,

    $1a,$b6,$55,$00,$87,$b5,$55,$04,$11,$55,$aa,$00,$1c,$a6,$b5,$00,

    $8a,$a5,$75,$02,$14,$52,$ba,$00,$81,$52,$6e,$06,$0d,$e9,$37,$00,

    $18,$74,$97,$00,$86,$ea,$96,$05,$10,$6d,$55,$00,$1a,$35,$aa,$00,

    $88,$4b,$6a,$02,$13,$a5,$6d,$00,$1e,$d2,$6e,$07,$0b,$d2,$5e,$00,

    $17,$e9,$2e,$00,$84,$d9,$2d,$05,$0f,$da,$95,$00,$19,$5b,$52,$00,

    $87,$56,$d4,$04,$11,$4a,$da,$00,$1c,$a5,$5d,$00,$89,$a4,$bd,$02,

    $15,$d2,$5d,$00,$82,$b2,$5b,$06,$0d,$b5,$2b,$00,$18,$ba,$95,$00,

    $86,$b6,$a5,$05,$10,$56,$b4,$00,$1a,$4a,$da,$00,$87,$49,$ba,$03,

    $13,$a4,$bb,$00,$1e,$b2,$5b,$07,$0b,$72,$57,$00,$16,$75,$2b,$00,

    $84,$6d,$2a,$06,$0f,$ad,$55,$00,$19,$55,$aa,$00,$86,$55,$6c,$04,

    $12,$c9,$76,$00,$1c,$64,$b7,$00,$8a,$e4,$ae,$02,$15,$ea,$56,$00,

    $83,$da,$55,$07,$0d,$5b,$2a,$00,$18,$ad,$55,$00,$85,$aa,$d5,$05,

    $10,$53,$6a,$00,$1b,$a9,$6d,$00,$88,$a9,$5d,$03,$13,$d4,$ae,$00,

    $81,$d4,$ab,$08,$0c,$ba,$55,$00,$16,$5a,$aa,$00,$83,$56,$aa,$06,

    $0f,$aa,$d5,$00,$19,$52,$da,$00,$86,$52,$ba,$04,$11,$a9,$5d,$00,

    $1d,$d4,$9b,$00,$8a,$74,$9b,$03,$15,$b6,$55,$00,$82,$ad,$55,$07,

    $0d,$55,$aa,$00,$18,$a5,$b5,$00,$85,$a5,$75,$05,$0f,$52,$b6,$00,

    $1b,$69,$37,$00,$89,$e9,$37,$04,$13,$74,$97,$00,$81,$ea,$96,$08,

    $0c,$6d,$52,$00,$16,$2d,$aa,$00,$83,$4b,$6a,$06,$0e,$a5,$6d,$00,

    $1a,$d2,$6e,$00,$87,$d2,$5e,$04,$12,$e9,$2e,$00,$1d,$ec,$96,$0a,

    $0b,$da,$95,$00,$15,$5b,$52,$00,$82,$56,$d2,$06,$0c,$2a,$da,$00,

    $18,$a4,$dd,$00,$85,$a4,$bd,$05,$10,$d2,$5d,$00,$1b,$d9,$2d,$00,

    $89,$b5,$2b,$03,$14,$ba,$95,$00,$81,$b5,$95,$08,$0b,$56,$b2,$00,

    $16,$2a,$da,$00,$83,$49,$b6,$05,$0e,$64,$bb,$00,$19,$b2,$5b,$00,

    $87,$6a,$57,$04,$12,$75,$2b,$00,$1d,$b6,$95,$00,$8a,$ad,$55,$02,

    $15,$55,$aa,$00,$82,$55,$6c,$07,$0d,$c9,$76,$00,$17,$64,$b7,$00,

    $86,$e4,$ae,$05,$11,$ea,$56,$00,$1b,$6d,$2a,$00,$88,$5a,$aa,$04,

    $14,$ad,$55,$00,$81,$aa,$d5,$09,$0b,$52,$ea,$00,$16,$a9,$6d,$00,

    $84,$a9,$5d,$06,$0f,$d4,$ae,$00,$1a,$ea,$4d,$00,$87,$ba,$55,$04,

    $12,$5a,$aa,$00,$1d,$ab,$55,$00,$8a,$a6,$d5,$02,$14,$52,$da,$00,

    $82,$52,$ba,$06,$0d,$a9,$3b,$00,$18,$b4,$9b,$00,$85,$74,$9b,$05,

    $11,$b5,$4d,$00,$1c,$d6,$a9,$00,$88,$35,$aa,$03,$13,$a5,$b5,$00,

    $81,$a5,$75,$0b,$0b,$52,$b6,$00,$16,$69,$37,$00,$84,$e9,$2f,$06,

    $10,$f4,$97,$00,$1a,$75,$4b,$00,$87,$6d,$52,$05,$11,$2d,$69,$00,

    $1d,$95,$b5,$00,$8a,$a5,$6d,$02,$15,$d2,$6e,$00,$82,$d2,$5e,$07,

    $0e,$e9,$2e,$00,$19,$ea,$96,$00,$86,$da,$95,$05,$10,$5b,$4a,$00,

    $1c,$ab,$69,$00,$88,$2a,$d8,$03);

 

  function CnMonthOfDate(Date: TDate): String;//指定日期的农历月

  function CnDayOfDate(Date: TDate): String;//指定日期的农历日

  function CnDateOfDateStr(Date: TDate): String;//指定日期的农历日期

 

implementation

 

//日期是该年的第几天,1月1日为第一天

function DaysNumberOfDate(Date: TDate): Integer;

var

  DaysNumber: Integer;

  I: Integer;

  yyyy, mm, dd: Word;

begin

  DecodeDate(Date, yyyy, mm, dd);

  DaysNumber := 0;

  for I := 1 to mm - 1 do

    Inc(DaysNumber, MonthDays[IsLeapYear(yyyy), I]);

  Inc(DaysNumber, dd);

  Result := DaysNumber;

end;

 

//日期的农历日期,返回农历格式:月份*100 + 日,负数为闰月

//超出范围则返回0

function CnDateOfDate(Date: TDate): Integer;

var

  CnMonth, CnMonthDays: array[0..15] of Integer;

 

  CnBeginDay, LeapMonth: Integer;

  yyyy, mm, dd: Word;

  Bytes: array[0..3] of Byte;

  I: Integer;

  CnMonthData: Word;

  DaysCount, CnDaysCount, ResultMonth, ResultDay: Integer;

begin

  DecodeDate(Date, yyyy, mm, dd);

  if (yyyy < 1901) or (yyyy > 2050) then

  begin

    Result := 0;

    Exit;

  end;

  Bytes[0] := CnData[(yyyy - 1901) * 4];

  Bytes[1] := CnData[(yyyy - 1901) * 4 + 1];

  Bytes[2] := CnData[(yyyy - 1901) * 4 + 2];

  Bytes[3] := CnData[(yyyy - 1901) * 4 + 3];

  if (Bytes[0] and $80) <> 0 then CnMonth[0] := 12

  else CnMonth[0] := 11;

  CnBeginDay := (Bytes[0] and $7f);

  CnMonthData := Bytes[1];

  CnMonthData := CnMonthData shl 8;

  CnMonthData := CnMonthData or Bytes[2];

  LeapMonth := Bytes[3];

 

  for I := 15 downto 0 do

  begin

    CnMonthDays[15 - I] := 29;

    if ((1 shl I) and CnMonthData) <> 0 then

      Inc(CnMonthDays[15 - I]);

    if CnMonth[15 - I] = LeapMonth then

      CnMonth[15 - I + 1] := - LeapMonth

    else

    begin

      if CnMonth[15 - I] < 0 then //上月为闰月

CnMonth[15 - I + 1] := - CnMonth[15 - I] + 1

else CnMonth[15 - I + 1] := CnMonth[15 - I] + 1;

if CnMonth[15 - I + 1] > 12 then CnMonth[15 - I + 1] := 1;

    end;

  end;

 

  DaysCount := DaysNumberOfDate(Date) - 1;

  if DaysCount <= (CnMonthDays[0] - CnBeginDay) then

begin

if (yyyy > 1901) and

      (CnDateOfDate(EncodeDate(yyyy - 1, 12, 31)) < 0) then

ResultMonth := - CnMonth[0]

else ResultMonth := CnMonth[0];

ResultDay := CnBeginDay + DaysCount;

end

else

begin

CnDaysCount := CnMonthDays[0] - CnBeginDay;

I := 1;

while (CnDaysCount < DaysCount) and

(CnDaysCount + CnMonthDays[I] < DaysCount) do

begin

Inc(CnDaysCount, CnMonthDays[I]);

Inc(I);

end;

ResultMonth := CnMonth[I];

ResultDay := DaysCount - CnDaysCount;

end;

if ResultMonth > 0 then

    Result := ResultMonth * 100 + ResultDay

  else Result := ResultMonth * 100 - ResultDay

end;

 

function CnMonthOfDate(Date: TDate): String;

const

  CnMonthStr: array[1..12] of String = (

    '一', '二', '三', '四', '五', '六', '七', '八', '九', '十',

    '冬', '蜡');

var

  Month: Integer;

begin

  Month := CnDateOfDate(Date) div 100;

  if Month < 0 then Result := '闰' + CnMonthStr[-Month]

else Result := CnMonthStr[Month] + '月';

end;

 

function CnDayOfDate(Date: TDate): String;

const

CnDayStr: array[1..30] of String = (

'初一', '初二', '初三', '初四', '初五',

'初六', '初七', '初八', '初九', '初十',

'十一', '十二', '十三', '十四', '十五',

'十六', '十七', '十八', '十九', '二十',

'廿一', '廿二', '廿三', '廿四', '廿五',

'廿六', '廿七', '廿八', '廿九', '三十');

var

Day: Integer;

begin

Day := Abs(CnDateOfDate(Date)) mod 100;

Result := CnDayStr[Day];

end;

 

function CnDateOfDateStr(Date: TDate): String;

begin

Result := CnMonthOfDate(Date) + CnDayOfDate(Date);

end;

 

end.



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