一个阳历转农历的java程序

import java.text.ParseException;  import java.text.SimpleDateFormat;  import java.util.Calendar;  import java.util.Date;  import java.util.*;    public class Lunar {      private int year;      private int month;      private int day;      private boolean leap;      final static String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};      static SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy年MM月dd日");      final static long[] lunarInfo = new long[]      {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};    //====== 传回农历 y年的总天数      final private static int yearDays(int y) {          int i, sum = 348;          for (i = 0x8000; i > 0x8; i >>= 1) {              if ((lunarInfo[y - 1900] & i) != 0) sum += 1;          }          return (sum + leapDays(y));      }    //====== 传回农历 y年闰月的天数      final private static int leapDays(int y) {          if (leapMonth(y) != 0) {              if ((lunarInfo[y - 1900] & 0x10000) != 0)                  return 30;              else                  return 29;          } else              return 0;      }    //====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0      final private static int leapMonth(int y) {          return (int) (lunarInfo[y - 1900] & 0xf);      }    //====== 传回农历 y年m月的总天数      final private static int monthDays(int y, int m) {          if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)              return 29;          else              return 30;      }    //====== 传回农历 y年的生肖      final public String animalsYear() {          final String[] Animals = new String[]{"鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪"};          return Animals[(year - 4) % 12];      }    //====== 传入 月日的offset 传回干支, 0=甲子      final private static String cyclicalm(int num) {          final String[] Gan = new String[]{"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};          final String[] Zhi = new String[]{"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};          return (Gan[num % 10] + Zhi[num % 12]);      }    //====== 传入 offset 传回干支, 0=甲子      final public String cyclical() {          int num = year - 1900 + 36;          return (cyclicalm(num));      }        /**       * 传出y年m月d日对应的农历.       * yearCyl3:农历年与1864的相差数 ?       * monCyl4:从1900年1月31日以来,闰月数       * dayCyl5:与1900年1月31日相差的天数,再加40 ?       *       * @param cal       * @return       */      public Lunar(Calendar cal) {          int yearCyl, monCyl, dayCyl;          int leapMonth = 0;          Date baseDate = null;          try {              baseDate = chineseDateFormat.parse("1900年1月31日");          } catch (ParseException e) {              e.printStackTrace(); //To change body of catch statement use Options | File Templates.          }    //求出和1900年1月31日相差的天数          int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);          dayCyl = offset + 40;          monCyl = 14;    //用offset减去每农历年的天数  // 计算当天是农历第几天  //i最终结果是农历的年份  //offset是当年的第几天          int iYear, daysOfYear = 0;          for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {              daysOfYear = yearDays(iYear);              offset -= daysOfYear;              monCyl += 12;          }          if (offset < 0) {              offset += daysOfYear;              iYear--;              monCyl -= 12;          }  //农历年份          year = iYear;            yearCyl = iYear - 1864;          leapMonth = leapMonth(iYear); //闰哪个月,1-12          leap = false;    //用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天          int iMonth, daysOfMonth = 0;          for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {  //闰月              if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {                  --iMonth;                  leap = true;                  daysOfMonth = leapDays(year);              } else                  daysOfMonth = monthDays(year, iMonth);                offset -= daysOfMonth;  //解除闰月              if (leap && iMonth == (leapMonth + 1)) leap = false;              if (!leap) monCyl++;          }  //offset为0时，并且刚才计算的月份是闰月，要校正          if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {              if (leap) {                  leap = false;              } else {                  leap = true;                  --iMonth;                  --monCyl;              }          }  //offset小于0时，也要校正          if (offset < 0) {              offset += daysOfMonth;              --iMonth;              --monCyl;          }          month = iMonth;          day = offset + 1;      }        public static String getChinaDayString(int day) {          String chineseTen[] = {"初", "十", "廿", "卅"};          int n = day % 10 == 0 ? 9 : day % 10 - 1;          if (day > 30)              return "";          if (day == 10)              return "初十";          else              return chineseTen[day / 10] + chineseNumber[n];      }        public String toString() {          return year + "年" + (leap ? "闰" : "") + chineseNumber[month - 1] + "月" + getChinaDayString(day);      }             public static void main(String[] args) {       Calendar cal=Calendar.getInstance();       SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日");       cal.setTimeZone(TimeZone.getDefault());       System.out.println("公历日期:"+sdf.format(cal.getTime()));       Lunar lunar=new Lunar(cal);       System.out.print("农历日期:");       System.out.print(lunar.year+"年 ");       System.out.print(lunar.month+"月 ");       System.out.print(getChinaDayString(lunar.day));       System.out.println("*************");       System.out.println(lunar);      }        /*   public static void main(String[] args) throws ParseException {    Calendar today = Calendar.getInstance();    today.setTime(chineseDateFormat.parse("2007年11月6日"));    Lunar lunar = new Lunar(today);    System.out.println("北京时间：" + chineseDateFormat.format(today.getTime()) + "　农历" + lunar);     }      */  }