JAVA基础时间类能否支持公历外的历法,该怎么处理

import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;public class Lunar {    private int year;    private int month;    private int day;    private boolean leap;    final static String chineseNumber[] = {"正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "腊"};    final static String chineseNumber1[] = {"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] + chineseNumber1[n];    }    public String toString() {        return (leap ? "闰" : "") + chineseNumber[month - 1] + "月" + getChinaDayString(day);    }    public String getChinaWeekdayString(String weekday){     if(weekday.equals("Mon"))      return "一";     if(weekday.equals("Tue"))      return "二";     if(weekday.equals("Wed"))      return "三";     if(weekday.equals("Thu"))      return "四";     if(weekday.equals("Fri"))      return "五";     if(weekday.equals("Sat"))      return "六";     if(weekday.equals("Sun"))      return "日";     else      return "";         }    public static void main(String[] args) throws ParseException{     Calendar today  = Calendar.getInstance();     today.setTime(new java.util.Date());//加载当前日期     //today.setTime(chineseDateFormat.parse("2006年10月30日"));//加载自定义日期     Lunar lunar = new Lunar(today);     System.out.print(lunar.cyclical()+"年");//计算输出阴历年份     System.out.println(lunar.toString());//计算输出阴历日期     System.out.println(lunar.animalsYear());//计算输出属相     System.out.println(new java.sql.Date(today.getTime().getTime()));//输出阳历日期     System.out.println("星期"+lunar.getChinaWeekdayString(today.getTime().toString().substring(0,3)));//计算输出星期几    }}