C#中(.net1.1)公元歷轉農曆的算法

原創 天边一只鼠 2018-08-28 05:39

參考C語言農曆200年算法(1900－2100)改寫

現行比較常用而精確的農曆算法基本上是根據紫金山天文臺發佈的農曆數據來轉換的，可惜在天文臺網站沒有相關的數據發佈，我所得到得數據是從原文中獲取的。
先看看預先定義的數據：
//舊曆數據1901年-2100年
  internal static uint[] LunarCalendarTable ={
               0x04AE53,0x0A5748,0x5526BD,0x0D2650,0x0D9544,0x46AAB9,0x056A4D,0x09AD42,0x24AEB6,0x04AE4A,/*1901-1910*/
               0x6A4DBE,0x0A4D52,0x0D2546,0x5D52BA,0x0B544E,0x0D6A43,0x296D37,0x095B4B,0x749BC1,0x049754,/*1911-1920*/
               0x0A4B48,0x5B25BC,0x06A550,0x06D445,0x4ADAB8,0x02B64D,0x095742,0x2497B7,0x04974A,0x664B3E,/*1921-1930*/
               0x0D4A51,0x0EA546,0x56D4BA,0x05AD4E,0x02B644,0x393738,0x092E4B,0x7C96BF,0x0C9553,0x0D4A48,/*1931-1940*/
               0x6DA53B,0x0B554F,0x056A45,0x4AADB9,0x025D4D,0x092D42,0x2C95B6,0x0A954A,0x7B4ABD,0x06CA51,/*1941-1950*/
               0x0B5546,0x555ABB,0x04DA4E,0x0A5B43,0x352BB8,0x052B4C,0x8A953F,0x0E9552,0x06AA48,0x7AD53C,/*1951-1960*/
               0x0AB54F,0x04B645,0x4A5739,0x0A574D,0x052642,0x3E9335,0x0D9549,0x75AABE,0x056A51,0x096D46,/*1961-1970*/
               0x54AEBB,0x04AD4F,0x0A4D43,0x4D26B7,0x0D254B,0x8D52BF,0x0B5452,0x0B6A47,0x696D3C,0x095B50,/*1971-1980*/
               0x049B45,0x4A4BB9,0x0A4B4D,0xAB25C2,0x06A554,0x06D449,0x6ADA3D,0x0AB651,0x093746,0x5497BB,/*1981-1990*/
               0x04974F,0x064B44,0x36A537,0x0EA54A,0x86B2BF,0x05AC53,0x0AB647,0x5936BC,0x092E50,0x0C9645,/*1991-2000*/
               0x4D4AB8,0x0D4A4C,0x0DA541,0x25AAB6,0x056A49,0x7AADBD,0x025D52,0x092D47,0x5C95BA,0x0A954E,/*2001-2010*/
               0x0B4A43,0x4B5537,0x0AD54A,0x955ABF,0x04BA53,0x0A5B48,0x652BBC,0x052B50,0x0A9345,0x474AB9,/*2011-2020*/
               0x06AA4C,0x0AD541,0x24DAB6,0x04B64A,0x69573D,0x0A4E51,0x0D2646,0x5E933A,0x0D534D,0x05AA43,/*2021-2030*/
               0x36B537,0x096D4B,0xB4AEBF,0x04AD53,0x0A4D48,0x6D25BC,0x0D254F,0x0D5244,0x5DAA38,0x0B5A4C,/*2031-2040*/
               0x056D41,0x24ADB6,0x049B4A,0x7A4BBE,0x0A4B51,0x0AA546,0x5B52BA,0x06D24E,0x0ADA42,0x355B37,/*2041-2050*/
               0x09374B,0x8497C1,0x049753,0x064B48,0x66A53C,0x0EA54F,0x06B244,0x4AB638,0x0AAE4C,0x092E42,/*2051-2060*/
               0x3C9735,0x0C9649,0x7D4ABD,0x0D4A51,0x0DA545,0x55AABA,0x056A4E,0x0A6D43,0x452EB7,0x052D4B,/*2061-2070*/
               0x8A95BF,0x0A9553,0x0B4A47,0x6B553B,0x0AD54F,0x055A45,0x4A5D38,0x0A5B4C,0x052B42,0x3A93B6,/*2071-2080*/
               0x069349,0x7729BD,0x06AA51,0x0AD546,0x54DABA,0x04B64E,0x0A5743,0x452738,0x0D264A,0x8E933E,/*2081-2090*/
               0x0D5252,0x0DAA47,0x66B53B,0x056D4F,0x04AE45,0x4A4EB9,0x0A4D4C,0x0D1541,0x2D92B5,0x0D5349 /*2091-2100*/
              };

以上定義的是一個無符號整型數組，隨後的數據賦值是根據農曆數據的2進制轉換到16進制的數據；我們來看看農曆數據的數據結構，比數組第一個數據0x04AE53是公元歷1901年對應的農曆數據，換算成2進製得到19位2進制1001010111001010011，整個農曆的數據結構是佔用32位整型的0-23共24位t數據，故1901年的整個數據000001001010111001010011。我們從數據的左邊開始，說明一下整個數據的含義。

 23

22

21

20 

表示當年閏月的月份，值爲0表示當年無閏月。 
說明數據的數據中23-20位爲0000，表示在公元1901年農曆春節後無閏月。
再看看19-7位的數據

 19

 18

 17

 16

 15

 14

 13

 12

 11

 10

9 

8 

 7

 1

 2

 3

 4

 5

 6

 7

 8

 9

 10

 11

 12

 13

農曆1－13月大小 ，1爲大月30天，0爲小月29天
如果有閏月，如閏2月，則閏2月排在17位的3月，農曆3月則排在16位的4月
我們在看看1901年農曆的對應月份

 19

 18

 17

 16

 15

 14

 13

 12

 11

 10

9

 8

 7
 0  1  0  0  1  0  1  0  1  1  1  0  0
 29  30  29  29  30  29  30  29  30  30  30  29  
最後看看第6位－第0位的結構

 6

 5

 4

 3

 2

 1

 0

 1

 0

 1

 0

0 

1 

 1
 春節公曆的月份  春節公曆的日期

 以上經過換算1901年春節公曆月份10爲2月，公曆日期10011爲19號

以下是我在C#下寫的轉換類庫，還不算很完全，基本能過獲取轉換後的舊曆。
OldData.cs:
using System;

namespace CsOldCalendar
{
 /// <summary>
 /// Data 的摘要說明。
 /// </summary>
 internal sealed class OldData
 {
  //舊曆數據1901年-2100年
  internal static uint[] LunarCalendarTable ={
               0x04AE53,0x0A5748,0x5526BD,0x0D2650,0x0D9544,0x46AAB9,0x056A4D,0x09AD42,0x24AEB6,0x04AE4A,/*1901-1910*/
               0x6A4DBE,0x0A4D52,0x0D2546,0x5D52BA,0x0B544E,0x0D6A43,0x296D37,0x095B4B,0x749BC1,0x049754,/*1911-1920*/
               0x0A4B48,0x5B25BC,0x06A550,0x06D445,0x4ADAB8,0x02B64D,0x095742,0x2497B7,0x04974A,0x664B3E,/*1921-1930*/
               0x0D4A51,0x0EA546,0x56D4BA,0x05AD4E,0x02B644,0x393738,0x092E4B,0x7C96BF,0x0C9553,0x0D4A48,/*1931-1940*/
               0x6DA53B,0x0B554F,0x056A45,0x4AADB9,0x025D4D,0x092D42,0x2C95B6,0x0A954A,0x7B4ABD,0x06CA51,/*1941-1950*/
               0x0B5546,0x555ABB,0x04DA4E,0x0A5B43,0x352BB8,0x052B4C,0x8A953F,0x0E9552,0x06AA48,0x7AD53C,/*1951-1960*/
               0x0AB54F,0x04B645,0x4A5739,0x0A574D,0x052642,0x3E9335,0x0D9549,0x75AABE,0x056A51,0x096D46,/*1961-1970*/
               0x54AEBB,0x04AD4F,0x0A4D43,0x4D26B7,0x0D254B,0x8D52BF,0x0B5452,0x0B6A47,0x696D3C,0x095B50,/*1971-1980*/
               0x049B45,0x4A4BB9,0x0A4B4D,0xAB25C2,0x06A554,0x06D449,0x6ADA3D,0x0AB651,0x093746,0x5497BB,/*1981-1990*/
               0x04974F,0x064B44,0x36A537,0x0EA54A,0x86B2BF,0x05AC53,0x0AB647,0x5936BC,0x092E50,0x0C9645,/*1991-2000*/
               0x4D4AB8,0x0D4A4C,0x0DA541,0x25AAB6,0x056A49,0x7AADBD,0x025D52,0x092D47,0x5C95BA,0x0A954E,/*2001-2010*/
               0x0B4A43,0x4B5537,0x0AD54A,0x955ABF,0x04BA53,0x0A5B48,0x652BBC,0x052B50,0x0A9345,0x474AB9,/*2011-2020*/
               0x06AA4C,0x0AD541,0x24DAB6,0x04B64A,0x69573D,0x0A4E51,0x0D2646,0x5E933A,0x0D534D,0x05AA43,/*2021-2030*/
               0x36B537,0x096D4B,0xB4AEBF,0x04AD53,0x0A4D48,0x6D25BC,0x0D254F,0x0D5244,0x5DAA38,0x0B5A4C,/*2031-2040*/
               0x056D41,0x24ADB6,0x049B4A,0x7A4BBE,0x0A4B51,0x0AA546,0x5B52BA,0x06D24E,0x0ADA42,0x355B37,/*2041-2050*/
               0x09374B,0x8497C1,0x049753,0x064B48,0x66A53C,0x0EA54F,0x06B244,0x4AB638,0x0AAE4C,0x092E42,/*2051-2060*/
               0x3C9735,0x0C9649,0x7D4ABD,0x0D4A51,0x0DA545,0x55AABA,0x056A4E,0x0A6D43,0x452EB7,0x052D4B,/*2061-2070*/
               0x8A95BF,0x0A9553,0x0B4A47,0x6B553B,0x0AD54F,0x055A45,0x4A5D38,0x0A5B4C,0x052B42,0x3A93B6,/*2071-2080*/
               0x069349,0x7729BD,0x06AA51,0x0AD546,0x54DABA,0x04B64E,0x0A5743,0x452738,0x0D264A,0x8E933E,/*2081-2090*/
               0x0D5252,0x0DAA47,0x66B53B,0x056D4F,0x04AE45,0x4A4EB9,0x0A4D4C,0x0D1541,0x2D92B5,0x0D5349 /*2091-2100*/
              };
  //internal static short[] MonthAdd ={0,31,59,90,120,151,181,212,243,273,304,334};
  internal static string[] OldDay = {"*","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"};
  internal static string[] OldMonth ={"*","正","二","三","四","五","六","七","八","九","十","十一","臘"};

  private OldData()

  {
   //
   // TODO: 在此處添加構造函數邏輯
   //
  }
 }
}

OldCalendar.CS：
using System;
using NUnit.Framework;

namespace CsOldCalendar
{
 /// <summary>
 /// OldCalendar 的摘要說明。
 /// </summary>
 public class OldCalendar
 {  
  
  const string DateSetError="輸入的日期不正確，年份：/"0-9999/"、月份：/"1-12/"、日期：/"1-31/"。";

  //舊曆閏年標記
  private bool _oldLeapYearFlag = false;
  //舊曆閏月標記
  private bool _oldLeapMonthFlag = false;
  //舊曆年份
  private string _oldYear = null;
  //舊曆月份
  private string _oldMonth = null;
  //舊曆日期
  private string _oldDay = null;
  //公曆年/月日
  private int _year;
  private int _month;
  private int _day;
  private DateTime _date;

  //是否可以轉換 
  private bool _enabled=false;

  //轉換日期範圍
  private DateTime _minDateTime;
  private DateTime _maxDateTime;
  

  /// <summary>
  /// 獲取公曆Date屬性
  /// </summary>
  public DateTime Date
  {
   get{return this._date;}
  }
  /// <summary>
  /// 獲取公曆年份屬性
  /// </summary>
  public int Year
  {
   get{return this._year;}
  }   

  /// <summary>
  /// 獲取公曆月份屬性
  /// </summary>
  public int Month
  {
   get{return this._month;}
  }


  /// <summary>
  /// 獲取公曆日期屬性
  /// </summary>
  public int Day
  {
   get{return this._day;}  
  }


  /// <summary>
  /// 獲取舊曆數字年份屬性
  /// </summary>
  public string OldYear
  {
   get{return this._oldYear;}
  }

  /// <summary>
  /// 獲取舊曆月份屬性
  /// </summary>
  public string OldMonth
  {
   get{return this._oldMonth;}
  }


  /// <summary>
  /// 獲取舊曆天數屬性
  /// </summary>
  public string OldDay
  {
   get{return this._oldDay;}
  }

  /// <summary>
  /// 獲取舊曆月是否閏月屬性
  /// </summary>
  public bool IsLeapOldMonth
  {
   get{return this._oldLeapMonthFlag;}
  }

  /// <summary>
  /// 獲取舊曆年是否閏年屬性
  /// </summary>
  public bool IsLeapOldYear
  {
   get {return this._oldLeapYearFlag;}
  }

  /// <summary>
  /// 獲取最小轉換日期屬性
  /// </summary>
  public DateTime MinDateTime
  {
   get
   {
    return this._minDateTime;
   }
  }

  /// <summary>
  /// 獲取最大轉換日期屬性
  /// </summary>
  public DateTime MaxDateTime
  {
   get{return this._maxDateTime;}
  }


  /// <summary>
  /// 獲取是否允許轉換爲舊曆
  /// </summary>
  public bool IsEnabled
  {
   get{return this._enabled;}
  }

  
  
  

  /// <summary>
  /// 構造函數，無參數取當前系統日期，並設置舊曆屬性。
  /// </summary>
  public OldCalendar()
  { 
   //設置轉換日期範圍
   SetConverBound();

   DateTime dt = DateTime.Now;
   this._year = dt.Year;
   this._month = dt.Month;
   this._day = dt.Day;
   this._date = dt;

   //判斷是否在轉換範圍
   if(dt <this._minDateTime || dt>this.MaxDateTime)
    this._enabled = false;
   else
    this._enabled = true;
   //舊曆轉換
   OldConver();
   
  }


  /// <summary>
  /// 構造函數，分別輸入年/月/日參數，並設置舊曆屬性，如參數超出範圍則引發異常。
  /// </summary>
  /// <param name="year">年：1-9999</param>
  /// <param name="month">月：1-12</param>
  /// <param name="day">日：1-month中的天數</param>
  public OldCalendar(int year,int month,int day)
  {
   DateTime dt;
   try
   {
    dt = new DateTime(year,month,day);  
    
   }
   catch
   {
    this._enabled = false;
    throw new Exception(DateSetError);     
   }

   this._date = dt;
   this._year = year;
   this._month = month;
   this._day = day;

   //設置日期轉換範圍
   SetConverBound();
   //判斷是否在轉換範圍
   if(dt <this._minDateTime || dt>this.MaxDateTime)
    this._enabled = false;
   else
    this._enabled = true;

   //舊曆轉換
   OldConver();


   
  }


  /// <summary>
  /// 構造函數，並設置舊曆屬性
  /// </summary>
  /// <param name="dt">System.DateTime</param>
  public OldCalendar(DateTime dt)
  {
   //設置轉換日期範圍
   SetConverBound();

   this._year = dt.Year;
   this._month = dt.Month;
   this._day = dt.Day;
   this._date = dt;

   //判斷是否在轉換範圍
   if(dt <this._minDateTime || dt>this.MaxDateTime)
    this._enabled = false;
   else
    this._enabled = true;

   //舊曆轉換
   OldConver();
  }


  /// <summary>
  /// 設置轉換範圍
  /// </summary>
  private void SetConverBound()
  {
   int year,month,day;
   year =1901;
   if(((OldData.LunarCalendarTable[year-1901] & 0x0060)>>5)==1)
    month=1;
   else
    month=2;
   day =(int) OldData.LunarCalendarTable[year-1901] & 0x001F;   
   this._minDateTime = new DateTime(year,month,day);

   year = 1900+OldData.LunarCalendarTable.Length;
   month = 12;
   day = DateTime.DaysInMonth(year,month);
   this._maxDateTime = new DateTime(year,month,day);

  }

  private void OldConver()
  {
   if(this._enabled == false)
    return;

   int spring_NY;   //待轉換公曆當年春節離元旦天數
   int sun_NY;    //待轉換公曆當天離元旦的天數
   int oldDayCount;  //轉換時舊曆月的天數
   int index;    //舊曆月索引(無閏1－12有閏1－13)
   int flag;    //閏月的特殊處理標誌
   uint oldData;   //舊曆數據

   int year,month,day;  //用於轉換年月日臨時變量

   year = this._year;
   //month = this._month;
   //day = this._day;  

   oldData = OldData.LunarCalendarTable[year-1901];

   
           
   if(((oldData & 0x0060)>>5)==1)   //春節在1月
    spring_NY = (int)(oldData & 0x001F) -1;
   else         //春節在2月
    spring_NY = (int)(oldData & 0x001F) -1 +31;

   sun_NY = this._date.DayOfYear -1;

            //公曆在春節前後的轉換
   if(sun_NY >= spring_NY)    //在春節或春節之後
   {
    //舊曆是否閏年
    if((oldData & 0xF00000>>20)==0)
     this._oldLeapYearFlag = false;
    else
     this._oldLeapYearFlag = true;

    sun_NY -= spring_NY;
    month = 1;
    index = 1;
    flag = 0;
    

    //獲取舊曆開始月的天數
    if((oldData & (0x80000>>(index-1)))==0)
     oldDayCount = 29;
    else
     oldDayCount = 30;

    while(sun_NY >= oldDayCount)
    {
     sun_NY -= oldDayCount;
     index++;
     if(month == (int)((oldData &0xF00000)>>20))
     {
      flag =~flag;
      if(flag ==0)
       month++;
     }
     else
      month++;

     //下個月舊曆的天數
     if((oldData & (0x80000 >>(index-1)))==0)
      oldDayCount =29;
     else
      oldDayCount = 30;
    }

    day = sun_NY +1;


   } //春節後轉換結束
   else  //春節前
   {   

    spring_NY -= sun_NY;
    year--;    
    month =12;

    oldData = OldData.LunarCalendarTable[year-1901];
    //舊曆是否閏年
    if((oldData & 0xF00000>>20)==0)
     this._oldLeapYearFlag = false;
    else
     this._oldLeapYearFlag = true;

    if(this._oldLeapYearFlag == false)
     index =12;
    else
     index =13;
    flag =0;
    if((oldData & (0x80000 >>(index-1)))==0)
     oldDayCount =29;
    else
     oldDayCount =30;

    while(spring_NY > oldDayCount)
    {
     spring_NY -= oldDayCount;
     index--;
     if(flag==0)
      month--;
     if(month ==(int)((oldData & 0xF00000) >>20))
      flag = ~flag;
     if((oldDayCount &(0x80000 >>(index-1)))==0)
      oldDayCount = 29;
     else
      oldDayCount =30;
    }
    day = oldDayCount - spring_NY +1;
   
   } //春節前後的轉換結束

   //給成員變量舊曆部分賦值
   this._oldDay = OldData.OldDay[day];
   this._oldMonth = OldData.OldMonth[month];
   this._oldYear = year.ToString();
   if((month == (int)((oldData & 0xF00000)>>20)) && (flag!=0))
    this._oldLeapMonthFlag = true;
   else
    this._oldLeapMonthFlag = false;
   
  } 
  
  
 }


 /// <summary>
 ///
 /// </summary>
 [TestFixture]
 public class OldCalendarTest
 {
  private OldCalendar oc;
  private OldCalendar oc1;
  
  public OldCalendarTest()
  {
   oc = new OldCalendar(2006,9,21);
   oc1 = new OldCalendar(2006,8,21);

  } 
  
  [Test]
  public void TestOldConver()
  {   
   Console.WriteLine(oc1.IsEnabled.ToString());
   Console.WriteLine(oc1.IsLeapOldMonth.ToString());
   Console.WriteLine(oc1.OldMonth+"月");
   Console.WriteLine(oc1.OldDay+"日");
   Console.WriteLine();
   Console.WriteLine(oc.IsEnabled.ToString());
   Console.WriteLine(oc.IsLeapOldMonth.ToString());
   Console.WriteLine(oc.OldMonth+"月");
   Console.WriteLine(oc.OldDay+"日");
  }
  
 }
} 

發表評論
所有評論
還沒有人評論，想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章