有谁会用java写农历转公历

会的人帮帮我啊

[code="java"]

import java.util.Calendar;
import java.util.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

//import com.veriweb.util.OurLog;
public final class Lauar {
private static Log log = LogFactory.getLog(Lauar.class);

private static int monCyl, dayCyl, yearCyl;

private static int year, month, day;

private static boolean isLeap;

private static int[] lunarInfo = { 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, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0,
        0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263,
        0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0,
        0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 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 };

private static int[] solarMonth = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31,
        30, 31 };

private static String[] Gan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛",
        "壬", "癸" };

private static String[] Zhi = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未",
        "申", "酉", "戌", "亥" };

private static String[] Animals = { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊",
        "猴", "鸡", "狗", "猪" };

private static int[] sTermInfo = { 0, 21208, 42467, 63836, 85337, 107014,
        128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989,
        308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224,
        483532, 504758 };

private static String[] nStr1 = { "日", "一", "二", "三", "四", "五", "六", "七",
        "八", "九", "十" };

private static String[] nStr2 = { "初", "十", "廿", "卅", "　" };

private static String[] monthNong = { "正", "正", "二", "三", "四", "五", "六",
        "七", "八", "九", "十", "十一", "十二" };

private static String[] yearName = { "零", "壹", "贰", "叁", "肆", "伍", "陆",
        "柒", "捌", "玖" };

public Lauar() {
}

//====================================== 传回农历 y年的总天数
private static int lYearDays(int y) {
    int i;
    int sum = 348; //29*12
    for (i = 0x8000; i > 0x8; i >>= 1) {
        //OurLog.debug("i="+i);
        sum += (lunarInfo[y - 1900] & i) == 0 ? 0 : 1; //大月+1天
    }
    return (sum + leapDays(y)); //+闰月的天数
}

//====================================== 传回农历 y年闰月的天数
private static int leapDays(int y) {
    if (leapMonth(y) != 0)
        return ((lunarInfo[y - 1900] & 0x10000) == 0 ? 29 : 30);
    else
        return (0);
}

//====================================== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
private static int leapMonth(int y) {
    return (lunarInfo[y - 1900] & 0xf);
}

//====================================== 传回农历 y年m月的总天数
private static int monthDays(int y, int m) {
    return ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0 ? 29 : 30);
}

//====================================== 算出农历, 传入日期物件, 传回农历日期物件
//                                      该物件属性有 .year .month .day .isLeap .yearCyl .dayCyl .monCyl
private static void Lunar1(Date objDate) {
    int i, leap = 0, temp = 0;
    //int monCyl,dayCyl,yearCyl;
    //int year,month,day;
    //boolean isLeap;
    Calendar cl = Calendar.getInstance();
    cl.set(1900, 0, 31); //1900-01-31是农历1900年正月初一
    Date baseDate = cl.getTime();
    //1900-01-31是农历1900年正月初一
    int offset = (int) ((objDate.getTime() - baseDate.getTime()) / 86400000); //天数(86400000=24*60*60*1000)
    //System.out.println(offset);
    dayCyl = offset + 40; //1899-12-21是农历1899年腊月甲子日
    monCyl = 14; //1898-10-01是农历甲子月
    //得到年数
    for (i = 1900; i < 2050 && offset > 0; i++) {
        temp = lYearDays(i); //农历每年天数
        offset -= temp;
        monCyl += 12;
    }
    if (offset < 0) {
        offset += temp;
        i--;
        monCyl -= 12;
    }
    year = i; //农历年份
    yearCyl = i - 1864; //1864年是甲子年
    leap = leapMonth(i); //闰哪个月
    isLeap = false;
    for (i = 1; i < 13 && offset > 0; i++) {
        //闰月
        if (leap > 0 && i == (leap + 1) && isLeap == false) {
            --i;
            isLeap = true;
            temp = leapDays(year);
        } else {
            temp = monthDays(year, i);
        }
        //解除闰月
        if (isLeap == true && i == (leap + 1))
            isLeap = false;
        offset -= temp;
        if (isLeap == false)
            monCyl++;
    }
    if (offset == 0 && leap > 0 && i == leap + 1)
        if (isLeap) {
            isLeap = false;
        } else {
            isLeap = true;
            --i;
            --monCyl;
        }
    if (offset < 0) {
        offset += temp;
        --i;
        --monCyl;
    }
    month = i; //农历月份
    day = offset + 1; //农历天份
    //System.out.println(day);
}

private static int getYear() {
    return (year);
}

private static int getMonth() {
    return (month);
}

private static int getDay() {
    return (day);
}

private static int getMonCyl() {
    return (monCyl);
}

private static int getYearCyl() {
    return (yearCyl);
}

private static int getDayCyl() {
    return (dayCyl);
}

private static boolean getIsLeap() {
    return (isLeap);
}

//============================== 传入 offset 传回干支, 0=甲子
private static String cyclical(int num) {
    return (Gan[num % 10] + Zhi[num % 12]);
}

//====================== 中文日期
private static String cDay(int d) {
    String s;
    switch (d) {
    case 10:
        s = "初十";
        break;
    case 20:
        s = "二十";
        break;
    case 30:
        s = "三十";
        break;
    default:
        s = nStr2[(int) (d / 10)];//取商
        s += nStr1[d % 10];//取余
    }
    return (s);
}

private static String cYear(int y) {
    String s = " ";
    int d;
    while (y > 0) {
        d = y % 10;
        y = (y - d) / 10;
        s = yearName[d] + s;
    }
    return (s);
}

public static String getLunar(String year, String month, String day) {

    Date sDObj;
    String s;
    int SY, SM, SD;

    int sy;
    SY = Integer.parseInt(year);
    SM = Integer.parseInt(month);
    SD = Integer.parseInt(day);
    sy = (SY - 4) % 12;
    log.debug("SY=" + SY + "SM=" + SM + "SD=" + SD + "sy=" + sy);
    Calendar cl = Calendar.getInstance();
    cl.set(SY, SM - 1, SD);
    sDObj = cl.getTime();
    //com.veriweb.util.OurLog.debug("sDObj="+sDObj);

    //日期
    Lunar1(sDObj); //农历
    s = "农历 " + "【" + Animals[sy] + "】" + cYear(getYear()) + "年" + " ";

    s += (getIsLeap() ? "闰" : "") + monthNong[getMonth()] + "月"
            + (monthDays(getYear(), getMonth()) == 29 ? "小" : "大");
    s += cDay(getDay()) + " ";
    s += cyclical(getYearCyl()) + "年" + cyclical(getMonCyl()) + "月"
            + cyclical(getDayCyl()) + "日";
    // System.out.println(s);
    return s;

}

public static void main(String[] args) {
    System.out.println(getLunar("2005", "8", "2"));
    System.out.println(getLunar("2006", "8", "3"));
    System.out.println(getLunar("2008", "6", "8"));
    System.out.println(getLunar("2010", "8", "3"));
    System.out.println(getLunar("2010", "7", "18"));
    //        农历 【鸡】贰零零伍 年 六月大廿八 乙酉年癸未月戊午日
    //        农历 【狗】贰零零陆 年 七月大初十 丙戌年丙申月甲子日
    //        农历 【虎】贰零壹零 年 六月小廿三 庚寅年癸未月乙酉日
    //=============修改之前VS修改之后============
    //        农历 【鸡】贰零零伍 年 六月大廿八 乙酉年癸未月戊午日
    //        农历 【狗】贰零零陆 年 七月大初十 丙戌年丙申月甲子日
    //        农历 【虎】贰零壹零 年 六月小廿三 庚寅年癸未月乙酉日
}

}

[/code]

http://www.yuanma.org/data/2006/0914/article_1538.htm 看看这个

这个问题自己在网上搜下就有了.建议你先搜索.