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JavaScript农历转换类

杰拉斯 杰拉斯 | 时间：2013-01-24, Thu | 8,506 views
前端开发　

今天在做项目的时候需要用到JavaScript农历转换算法，从网上搜索并整理了一下，重新写出一个JavaScript农历转换类，不敢独占，特此与大家分享。

/*!
 * LunarDate v1.0.0
 * http://www.clanfei.com/
 *
 * Author: Lanfei
 * Date: 2013-1-24
 */
var LunarDate = {
    madd: new Array(0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334),
    HsString: '甲乙丙丁戊己庚辛壬癸',
    EbString: '子丑寅卯辰巳午未申酉戌亥',
    NumString: "一二三四五六七八九十",
    MonString: "正二三四五六七八九十冬腊",
    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),
    Year: null,
    Month: null,
    Day: null,
    TheDate: null,
    GetBit: function(m, n){
        return (m >> n) & 1;
    },
    e2c: function(){
        this.TheDate = (arguments.length != 3) ? new Date(): new Date(arguments[0], arguments[1], arguments[2]);
        var total, m, n, k;
        var isEnd = false;
        var tmp = this.TheDate.getFullYear();
        total = (tmp - 1921) * 365 + Math.floor((tmp - 1921) / 4) + this.madd[this.TheDate.getMonth()] + this.TheDate.getDate() - 38;
        if (this.TheDate.getYear() % 4 == 0 && this.TheDate.getMonth() > 1) {
            total++;
        }
        for (m = 0; ; m++) {
            k = (this.CalendarData[m] < 0xfff) ? 11: 12;
            for (n = k; n >= 0; n--) {
                if (total <= 29 + this.GetBit(this.CalendarData[m], n)) {
                    isEnd = true;
                    break;
                }
                total = total - 29 - this.GetBit(this.CalendarData[m], n);
            }
            if (isEnd)
                break;
        }
        this.Year = 1921 + m;
        this.Month = k - n + 1;
        this.Day = total;
        if (k == 12) {
            if (this.Month == Math.floor(this.CalendarData[m] / 0x10000) + 1) {
                this.Month = 1 - this.Month;
            }
            if (this.Month > Math.floor(this.CalendarData[m] / 0x10000) + 1) {
                this.Month--;
            }
        }
    },
    GetcDateString: function(){
        var tmp = "";
        tmp += this.HsString.charAt((this.Year - 4) % 10);
        tmp += this.EbString.charAt((this.Year - 4) % 12);
        tmp += "年 ";
        if (this.Month < 1) {
            tmp += "(闰)";
            tmp += this.MonString.charAt(-this.Month - 1);
        } else {
            tmp += this.MonString.charAt(this.Month - 1);
        }
        tmp += "月";
        tmp += (this.Day < 11) ? "初": ((this.Day < 20) ? "十": ((this.Day < 30) ? "廿": "三十"));
        if (this.Day % 10 != 0 || this.Day == 10) {
            tmp += this.NumString.charAt((this.Day - 1) % 10);
        }
        return tmp;
    },
    GetLunarDay: function(solarYear, solarMonth, solarDay) {
        if (solarYear < 1921 || solarYear > 2020) {
            return "";
        } else {
            solarMonth = (parseInt(solarMonth) > 0) ? (solarMonth - 1): 11;
            this.e2c(solarYear, solarMonth, solarDay);
            return this.GetcDateString();
        }
    }
};

调用方法：

    LunarDate.GetLunarDay(2013, 1, 24);

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