公历转换农历的算法(JavaScript)

来源：互联网发布：管理二手车软件编辑：程序博客网时间：2024/05/16 05:32

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<!--
var lunarInfo=new Array(/* 1900 */
0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0,/* 2049 */
//下面的是从 2050 到 2100 年的
0x14b63, /* 2050 */
0x09370, 0x049f8, 0x04970, 0x064b0, 0x168a6, /* 2055 */
0x0ea50, 0x06b20, 0x1a6c4, 0x0aae0, 0x0a2e0, /* 2060 */
0x0d2e3, 0x0c960, 0x0d557, 0x0d4a0, 0x0da50, /* 2065 */
0x05d55, 0x056a0, 0x0a6d0, 0x055d4, 0x052d0, /* 2070 */
0x0a9b8, 0x0a950, 0x0a4a0, 0x0b6a6, 0x0ad50, /* 2075 */
0x055a0, 0x0aba0, 0x0a5b0, 0x052b0, 0x0b273, /* 2080 */
0x06930, 0x07337, 0x06aa0, 0x0ad50, 0x14b55, /* 2085 */
0x04b60, 0x0a570, 0x054e4, 0x0d260, 0x0e968, /* 2090 */
0x0d520, 0x0daa0, 0x16aa6, 0x056d0, 0x04ae0, /* 2095 */
0x0a9d4, 0x0a4d0, 0x0d150, 0x0f252, 0x0d520 /* 2100 */
);
var Animals=new Array("鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪");
var Gan=new Array("甲","乙","丙","丁","戊","己","庚","辛","壬","癸");
var Zhi=new Array("子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥");
var now = new Date();
var SY = now.getYear();
var SM = now.getMonth();
var SD = now.getDate();
//==== 传入 offset 传回干支, 0=甲子
function cyclical(num)
{
return(Gan[num%10]+Zhi[num%12]);
}
//==== 传回农历 y年的总天数
function lYearDays(y)
{
 var i, sum = 348;
 for(i=0x8000; i>0x8; i>>=1) sum += (lunarInfo[y-1900] & i) ? 1 : 0;
 return(sum+leapDays(y));
}
//==== 传回农历 y年闰月的天数
function leapDays(y)
{
 if(leapMonth(y)) return((lunarInfo[y-1900] & 0x10000) ? 30 : 29);
 else return(0);
}
//==== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
function leapMonth(y)
{
return(lunarInfo[y-1900] & 0xf);
}

//====================================== 传回农历 y年m月的总天数
function monthDays(y, m)
{
return (lunarInfo[y-1900] & (0x10000>>m))? 30 : 29;
}

//==== 算出农历, 传入日期物件, 传回农历日期物件
//==== 该物件属性有 .year .month .day .isLeap .yearCyl .dayCyl .monCyl
function Lunar(objDate)
{
   var i, leap=0, temp=0;
   var baseDate = new Date(1900,0,31);
   var offset = (objDate - baseDate)/86400000;

this.dayCyl = offset + 40;
this.monCyl = 14;

for (i = 1900; i<2050 && offset>0; i++)
 {
 temp = lYearDays(i);
 offset -= temp;
 this.monCyl += 12;
 }
 if (offset < 0)
 {
 offset += temp;
 i--;
 this.monCyl -= 12;
 }

this.year = i;
this.yearCyl = i-1864;

leap = leapMonth(i); //闰哪个月
this.isLeap = false;

for (i = 1; i < 13 && offset > 0; i++)
 {
 //闰月
 if (leap > 0 && i == (leap+1) && this.isLeap == false)
 {
 --i;
 this.isLeap = true;
 temp = leapDays(this.year);
 }
 else
 {
 temp = monthDays(this.year, i);
 }

      //解除闰月
      if (this.isLeap == true && i == (leap+1))
      {
         this.isLeap = false;
      }

      offset -= temp;
      if (this.isLeap == false)
      {
         this.monCyl++;
      }
   }

   if (offset == 0 && leap > 0 && i == leap + 1)
   {
      if (this.isLeap)
      {
        this.isLeap = false;
      }
      else
      {
        this.isLeap = true;
        --i;
        --this.monCyl;
      }
   }

if (offset < 0)
 {
 offset += temp;
 --i;
 --this.monCyl;
 }

this.month = i;
this.day = offset + 1;
}

if (solarTerms == '' && solarFestival == '' && lunarFestival == '')
 festival = '';
else
 festival = '<TABLE WIDTH=100% BORDER=0 CELLPADDING=2 CELLSPACING=0 BGCOLOR="#CCFFCC"><TR><TD align=center><marquee direction=left scrolldelay=120 behavior=alternate>'+
 '' + solarTerms + ' ' + solarFestival + ' ' + lunarFestival + ''+
 '</marquee></TD></TR></TABLE>';

return(''+festival+'');
}

//显示当前时间
function CurentTime()
{
 var now = new Date();
 var hh = now.getHours();
 var mm = now.getMinutes();
 var ss = now.getTime() % 60000;
 ss = (ss - (ss % 1000)) / 1000;
 var clock = hh+':';
 if (mm < 10) clock += '0';
 clock += mm+':';
 if (ss < 10) clock += '0';
 clock += ss;
 return(clock);
}

function refreshCalendarClock() //
{
 document.all.ClockTime.innerHTML = CurentTime();
}
//显示当前时间
function setCalendar()
{
 document.write("<table border='1' cellspacing='3' width='180' bordercolor='#009B00' bgcolor='#FFFFFF' height='110' cellpadding='2'");
 document.write("<tr><td align='center'>"+YYMMDD()+" "+SD+" ");
 document.write(weekday()+" "+CurentTime()+" ");
 document.write(solarDay1()+" "+solarDay2()+" "+solarDay3()+"</td></tr></table>");
}
setCalendar();
setInterval('refreshCalendarClock()', 1000);//1秒钟刷新1次当前时间(不刷新日期)
//-->
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