农历与公历日期转换（1900年 至 2049年）

1.农历对照数据集

/**  * 1900年1月31日对应农历正月初一  * 数据17位长度(二进制)，最高位表示闰月的大小和大小 30， 小 29，例：((LunarDates[0]) >> 16 & 0x01) > 0 ? 30 : 29  * 第16 至 5 位 表示 1-12 月天数，((LunarDates[0]) >> [15~4] & 0x01) > 0 ? 30 : 29  * 第4 至 1 位 表示 闰那个月， 0表示不闰月  LunarDates[0] & 0x0f  * **/ private static final int[] LunarDates = new int[]{         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,         0x04AF5,0x04970,0x064B0,0x074A3,0x0EA50,0x06B58,0x055C0,0x0AB60,0x096D5,0x092E0,         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,         0x14B63};

二、公历转农历日期：

public static int[] getLunarDateFromDate(Date date){     int[] lunarDate = new int[3];     Calendar calendar = Calendar.getInstance();     calendar.setTime(date);     int year = calendar.get(Calendar.YEAR);     if (year < 1900 || year > 2050)return lunarDate;     else if (year == 1900){         int month = calendar.get(Calendar.MONTH);         if (month == 0)return lunarDate;     }     long sumDay = sumDay(date);     return computeLunarDate(sumDay); }

/**  * 计算距离1900-01-31的总天数  *  * @param date 参与计算的日期  * **/ private static long sumDay(Date date){     Calendar calendar = Calendar.getInstance();     calendar.setTime(date);     int year = calendar.get(Calendar.YEAR);     int startYear = 1901;     long day = 365 -30;     if (startYear == year){         day  = calendar.get(Calendar.DAY_OF_YEAR);     }else {         while (year > startYear){            if ((startYear % 4 == 0 && startYear % 100 != 0) || startYear % 400 == 0){                day  = 366;            }else {                day  = 365;            }            startYear   ;         }         day  = calendar.get(Calendar.DAY_OF_YEAR);     }     return day; }

/**  * 根据天数差计算农历日期  * @param sumDay 总天数为1900-01-31  *  * @return 返回农历年月日数组， 当月负数表示闰月  * **/ private static int[] computeLunarDate(long sumDay){     int[] lunarDates = new int[3];     long tDay = 0;     int lunarDate = 0;     for (int i=0;i < LunarDates.length; i  ){         lunarDate = LunarDates[i];         int ltd = lunarYearDays(lunarDate);         tDay  = ltd;         if (tDay > sumDay){             tDay = tDay - ltd;             lunarDates[0] = 1900   i;             break;         }     }     long dt = sumDay - tDay;     int yunDays = ((lunarDate >> 16) & 0x01) == 1 ? 30 : 29;     int runYue = lunarDate & 0x0f;     for (int i = 1;i<13;i  ){         int index = 16 - i;         int day = ((lunarDate>>index) & 0x01) == 1 ? 30 : 29;         if (dt <= day){             lunarDates[1] = i;             lunarDates[2] = (int)dt;             break;         }         dt = dt - day;         if (runYue == i){             if (dt <= yunDays){                 lunarDates[1] = -i;                 lunarDates[2] = (int)dt;                 break;             }             dt = dt - yunDays;         }     }     return lunarDates; }

/**  * 农历一年的总天数  * @param lunarDate 农历一年数据  *   * **/ private static int lunarYearDays(int lunarDate){     int yunDays = (lunarDate >> 16) & 0x01;     int days = 0;     for (int b = 15; b > 3; b --){         int day = ((lunarDate >> b) & 0x01) == 1 ? 30 : 29;         days  = day;     }     int runYue = lunarDate & 0x0f;     if (runYue > 0){         days  = yunDays == 1 ? 30 : 29;     }     return days; }

3.农历日期转公历日期

/**  * 农历日期只能转换为公历日期 1900年1月31日 至 2049年12月31日  * 闰月月份为负数，如 润4月 为 -4  *  * @param lunarYear 农历年  * @param lunarMonth 农历月  * @param lunarDay 农历日  * **/ public static Date getDateFromLunarDate(@IntRange(from = 1900, to = 2049) int lunarYear, int lunarMonth, int lunarDay){     int year = lunarYear - 100;
    int days = 0;
    for (int i=0; i< year; i++){
        days += lunarYearDays(LunarDates[i]);
    }
    int lunarDate = LunarDates[year];
    int yunDays = ((lunarDate >> 16) & 0x01) == 1 ? 30 : 29;
    int runYue = lunarDate & 0x0f;
    if (runYue < Math.abs(lunarMonth) && runYue != 0)days += yunDays;
    for (int i = 1;i<13;i++){
        int index = 16 - i;
        int day = ((lunarDate>>index) & 0x01) == 1 ? 30 : 29;
        if (lunarMonth > 0){
            if (lunarMonth == i){
                days += lunarDay;
                break;
            }else {
                days += day;
            }
        }else {
            if (i < -lunarMonth){
                days += day;
            }else if (i == -lunarDate){
                days += day;
                days += lunarDay;
                break;
            }
        }
    }
    int yearDays = 0;//公历初始天数
    int[] ymd = new int[3];
    for (int i=1900;i<=lunarYear+1;i++){
        int day = 365;
        if (i%100 == 0){
            if (i%400 == 0) day = 366;
        }else if (i%4 == 0){
            day = 366;
        }
        if (yearDays + day > days){
            ymd[0] = i;
            break;
        }
        yearDays += day;
    }
    Calendar calendar = Calendar.getInstance();
    calendar.clear();
    calendar.set(Calendar.YEAR, ymd[0]);
    int cd = days - (yearDays - 30);
    calendar.set(Calendar.DAY_OF_YEAR, cd);
    return calendar.getTime();
}