農(nóng)歷轉(zhuǎn)換方法 lunarDay.js

/**
 * 獲取某個日期的農(nóng)歷
 * @parmas {newDate} 日期 年-月-日
 */
 function getLunar(newDate){

    var nyear;
    var nmonth;
    var nday = -1;
    var nwday;
    var nhrs;
    var nmin;
    var nsec;
    var newDate = newDate;

    var lmonth, lday, lleap; //農(nóng)歷參數(shù)
    
    function Draw() {
        NewTick();

        //顯示時間
        var s = nyear + '年' + nmonth + '月' + nday + '日 ' + '星期' + cweekday(nwday) + ' ' + shapetime(nhrs, nmin, nsec);
        s += " 農(nóng)歷" + lmonth + "月" + lday; //農(nóng)歷
        var lunar_month_day=lmonth + "月" + lday;
        return lunar_month_day;
    }
    
    
    function NewTick() {
        var noww = newDate ? new Date(newDate) : new Date();
        if (noww.getDate() != nday) {
            nyear = noww.getFullYear();
            nmonth = noww.getMonth() + 1;
            nwday = noww.getDay();
            nday = noww.getDate();

            getlunar(); //獲取農(nóng)歷
        }
        nhrs = noww.getHours();
        nmin = noww.getMinutes();
        nsec = noww.getSeconds();
    }


    //輔助函數(shù)
    var hzWeek = new Array("日", "一", "二", "三", "四", "五", "六", "日");
    function cweekday(wday) {
        return hzWeek[wday];
    }
    function shapetime(vhrs, vmin, vsec) {
        if (vsec <= 9) vsec = "0" + vsec;
        if (vmin <= 9) vmin = "0" + vmin;
        if (vhrs <= 9) vhrs = "0" + vhrs;
        return vhrs + ":" + vmin + ":" + vsec
    }

    //農(nóng)歷函數(shù)開始
    var lunarInfo = new Array(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, 0x0a5b0, 0x14573, 0x052b0, 0x0a9a8, 0x0e950, 0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b6a0, 0x195a6, 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x05ac0, 0x0ab60, 0x096d5, 0x092e0, //1990
    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, 0x14b63);
    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));
    }
    function leapDays(y) {
        if (leapMonth(y)) return ((lunarInfo[y - 1900] & 0x10000) ? 30 : 29);
        else return (0);
    }
    function leapMonth(y) {
        return (lunarInfo[y - 1900] & 0xf);
    }
    function monthDays(y, m) {
        return ((lunarInfo[y - 1900] & (0x10000 >> m)) ? 30 : 29);
    }
    function Lunar(y, m, d) {
        var i, leap = 0,
        temp = 0;
        var offset = (Date.UTC(y, m, d) - Date.UTC(1900, 0, 31)) / 86400000;
        for (i = 1900; i < 2050 && offset > 0; i++) {
            temp = lYearDays(i);
            offset -= temp;
        }
        if (offset < 0) {
            offset += temp;
            i--;
        }
        this.year = i;
        leap = leapMonth(i);
        this.isLeap = false;
        for (i = 1; i < 13 && offset > 0; i++) {
            if (leap > 0 && i == (leap + 1) && this.isLeap == false) {--i;
                this.isLeap = true;
                temp = leapDays(this.year);
            } else {
                temp = monthDays(this.year, i);
            }
            if (this.isLeap == true && i == (leap + 1)) this.isLeap = false;
            offset -= temp;
        }
        if (offset == 0 && leap > 0 && i == leap + 1) if (this.isLeap) {
            this.isLeap = false;
        } else {
            this.isLeap = true; --i;
        }
        if (offset < 0) {
            offset += temp; --i;
        }
        this.month = i;
        this.day = offset + 1;
    }
    var nStr1 = new Array('', '一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '十一', '十二');
    var nStr2 = new Array('初', '十', '廿', '卅', '□');
    function GetcDay(d) {
        var s;
        switch (d) {
        case 10:
            s = '初十';
            break;
        case 20:
            s = '二十';
            break;
        case 30:
            s = '三十';
            break;
        default:
            s = nStr2[Math.floor(d / 10)];
            s += nStr1[d % 10];
            break;
        }
        return (s);
    }
    function GetcMon(m) {
        if (m == 1) return '正';
        else return nStr1[m];
    }
    function getlunar() {
        var lObj = new Lunar(nyear, nmonth - 1, nday);
        lmonth = GetcMon(lObj.month);
        lday = GetcDay(lObj.day);
        lleap = lObj.isLeap;
        if (lleap == 1) {
            lmonth = "閏" + lmonth;
        }
    }
    //農(nóng)歷函數(shù)結(jié)束
    return Draw();
}
/**獲取農(nóng)歷 end*/

export { getLunar }

使用

import { getLunar } from '@/utils/lunarDay';
getLunar('2023-04-23'); // 三月初四