js获取农历

上一篇我们对upupoo网页壁纸改造时用到了农历，upupoo(网页壁纸)自主修改一：农历，这里记一下笔记：

获取当前农历的js

主js:

//农历
            var CalendarData=new Array(100);
            var madd=new Array(12);
            var tgString="甲乙丙丁戊己庚辛壬癸";
            var dzString="子丑寅卯辰巳午未申酉戌亥";
            var numString="一二三四五六七八九十";
            var monString="正二三四五六七八九十冬腊";
            var weekString="日一二三四五六";
            var sx="鼠牛虎兔龙蛇马羊猴鸡狗猪";
            var cYear,cMonth,cDay,TheDate;
            CalendarData = new Array(0xA4B,0x5164B,0x6A5,0x6D4,0x415B5,0x2B6,0x957,0x2092F,0x497,0x60C96,0xD4A,0xEA5,0x50DA9,0x5AD,0x2B6,0x3126E, 0x92E,0x7192D,0xC95,0xD4A,0x61B4A,0xB55,0x56A,0x4155B, 0x25D,0x92D,0x2192B,0xA95,0x71695,0x6CA,0xB55,0x50AB5,0x4DA,0xA5B,0x30A57,0x52B,0x8152A,0xE95,0x6AA,0x615AA,0xAB5,0x4B6,0x414AE,0xA57,0x526,0x31D26,0xD95,0x70B55,0x56A,0x96D,0x5095D,0x4AD,0xA4D,0x41A4D,0xD25,0x81AA5,0xB54,0xB6A,0x612DA,0x95B,0x49B,0x41497,0xA4B,0xA164B, 0x6A5,0x6D4,0x615B4,0xAB6,0x957,0x5092F,0x497,0x64B, 0x30D4A,0xEA5,0x80D65,0x5AC,0xAB6,0x5126D,0x92E,0xC96,0x41A95,0xD4A,0xDA5,0x20B55,0x56A,0x7155B,0x25D,0x92D,0x5192B,0xA95,0xB4A,0x416AA,0xAD5,0x90AB5,0x4BA,0xA5B, 0x60A57,0x52B,0xA93,0x40E95);
            madd[0]=0;
            madd[1]=31;
            madd[2]=59;
            madd[3]=90;
            madd[4]=120;
            madd[5]=151;
            madd[6]=181;
            madd[7]=212;
            madd[8]=243;
            madd[9]=273;
            madd[10]=304;
            madd[11]=334;
             
            function GetBit(m,n){
                return (m>>n)&1;
            }
            function e2c(){
                TheDate= (arguments.length!=3) ? new Date() : new Date(arguments[0],arguments[1],arguments[2]);
                var total,m,n,k;
                var isEnd=false;
                var tmp=TheDate.getYear();
                if(tmp<1900){
                    tmp+=1900;
                }
                total=(tmp-1921)*365+Math.floor((tmp-1921)/4)+madd[TheDate.getMonth()]+TheDate.getDate()-38;
                 
                if(TheDate.getYear()%4==0&&TheDate.getMonth()>1) {
                    total++;
                }
                for(m=0;;m++){
                    k=(CalendarData[m]<0xfff)?11:12;
                    for(n=k;n>=0;n--){
                        if(total<=29+GetBit(CalendarData[m],n)){
                            isEnd=true; break;
                        }
                        total=total-29-GetBit(CalendarData[m],n);
                    }
                    if(isEnd) break;
                }
                cYear=1921 + m;
                cMonth=k-n+1;
                cDay=total;
                if(k==12){
                    if(cMonth==Math.floor(CalendarData[m]/0x10000)+1){
                        cMonth=1-cMonth;
                    }
                    if(cMonth>Math.floor(CalendarData[m]/0x10000)+1){
                        cMonth--;
                    }
                }
            }
             
            function GetcDateString(){
                var tmp="";
                tmp+=tgString.charAt((cYear-4)%10);
                tmp+=dzString.charAt((cYear-4)%12);
                tmp+="(";
                tmp+=sx.charAt((cYear-4)%12);
                tmp+=")年 ";
                if(cMonth<1){
                    tmp+="(闰)";
                    tmp+=monString.charAt(-cMonth-1);
                }else{
                    tmp+=monString.charAt(cMonth-1);
                }
                tmp+="月";
                tmp+=(cDay<11)?"初":((cDay<20)?"十":((cDay<30)?"廿":"三十"));
                if (cDay%10!=0||cDay==10){
                    tmp+=numString.charAt((cDay-1)%10);
                }
                return tmp;
            }
             
            function GetLunarDay(solarYear,solarMonth,solarDay){
                //solarYear = solarYear<1900?(1900+solarYear):solarYear;
                if(solarYear<1921 || solarYear>2020){
                    return "";
                }else{
                    solarMonth = (parseInt(solarMonth)>0) ? (solarMonth-1) : 11;
                    e2c(solarYear,solarMonth,solarDay);
                    return GetcDateString();
                }
            }

使用：

//农历
            var yy=date.getFullYear();
            var mm=date.getMonth()+1;
            var dd=date.getDate();
            if (yy<100) yy="19"+yy;
            
        document.getElementById('nong').innerHTML = GetLunarDay(yy,mm,dd);