javascript阳历转阴历方法

最新推荐文章于 2024-10-10 07:42:47 发布
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本文介绍了一个用于将公历日期转换为农历日期的JavaScript算法。该算法通过一系列数学运算及位操作来确定输入公历日期对应的农历年月日，并提供字符串形式的农历日期输出。适用于需要进行日期转换的应用场景。
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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();  

                        }  

                }  

        };

window.onload = function(){

   //调用方法LunarDate.GetLunarDay(年, 月, 日)

            document.write('2014-04-01 农历'+LunarDate.GetLunarDay(2014, 4, 1));

        };