java農曆/舊曆的計算代碼

import java.util.Calendar;

import java.util.Date;

public class Nongli {

 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", "醜", "寅", "卯", "辰", "巳", "午", "未",

   "申", "酉", "戌", "亥" };

 private static String[] Animals = { "鼠", "牛", "虎", "兔", "龍", "蛇", "馬", "羊",

   "猴", "雞", "狗", "豬" };

 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", "貳", "叁", "肆", "伍", "陸",

   "柒", "捌", "玖" };

 private Object LogFactory;

 // ====================================== 傳回農曆 y年的總天數

 private static int lYearDays(int y) {

  int i;

  int sum = 348; // 29*12

  for (i = 0x8000; i > 0x8; i >>= 1) {

   sum += (lunarInfo[y - 1900] & i) == 0 ? 0 : 1; // 大月+1天

  }

  return (sum + leapDays(y)); // +閏月的天數

 }

 // ======================================傳回農曆y年閏月的天數

 private static int leapDays(int y) {

  if (leapMonth(y) != 0) {

   return ((lunarInfo[y - 1900] & 0x10000) == 0 ? 29 : 30);

  } else {

   return (0);

  }

 }

 // ====================================== 傳回農曆 y 年閏哪個月 1-12 , 沒 閏傳回 0

 private static int leapMonth(int y) {

  return (lunarInfo[y - 1900] & 0xf);

 }

 // ====================================== 傳回農曆 y 年 m 月的總天數

 private static int monthDays(int y, int m) {

  return ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0 ? 29 : 30);

 }

 // ====================================== 算出農曆,傳入日期物件,傳回農曆日期物件

 // 該物件屬性有 .year .month .day .isLeap .yearCyl .dayCyl .monCyl

 private static void Lunar1(Date objDate) {

  int i, leap = 0, temp = 0;

  Calendar cl = Calendar.getInstance();

  cl.set(1900, 0, 31); // 1900-01-31是農曆1900年正月初一

  Date baseDate = cl.getTime();

  // 1900-01-31是農曆1900年正月初一

  int offset = (int) ((objDate.getTime() - baseDate.getTime()) / 86400000);

  // 天 數 (86400000=24*60*60*1000)

  dayCyl = offset + 40; // 1899-12-21 是農曆 1899 年臘月甲子日

  monCyl = 14; // 1898-10-01 是農曆甲子月

  // 得到年數

  for (i = 1900; i < 2050 && offset > 0; i++) {

   temp = lYearDays(i); // 農曆每年天數

   offset -= temp;

   monCyl += 12;

  }

  if (offset < 0) {

   offset += temp;

   i--;

   monCyl -= 12;

  }

  year = i; // 農曆年份

  yearCyl = i - 1864; // 1864 年是甲子年

  leap = leapMonth(i); // 閏哪個月

  isLeap = false;

  for (i = 1; i < 13 && offset > 0; i++) {

   // 閏月

   if (leap > 0 && i == (leap + 1) && isLeap == false) {

    --i;

    isLeap = true;

    temp = leapDays(year);

   } else {

    temp = monthDays(year, i);

   }

   // 解除閏月

   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; // 農曆月份

  day = offset + 1; // 農曆天份

 }

 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);

 }

 // ============================== 傳入 offset 傳回幹支 , 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];// 取餘

  }

  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;

  Calendar cl = Calendar.getInstance();

  cl.set(SY, SM - 1, SD);

  sDObj = cl.getTime();

  // 日期

  Lunar1(sDObj); // 農曆

  s = "農曆" + "【" + Animals[sy] + "】" + cYear(getYear()) + "年" + " ";

  s += (getIsLeap() ? "閏" : "") + monthNong[getMonth()] + "月"

    + (monthDays(getYear(), getMonth()) == 29 ? "小" : "大");

  s += cDay(getDay()) + " ";

  s += cyclical(getYearCyl()) + "年" + cyclical(getMonCyl()) + "月"

    + cyclical(getDayCyl()) + "日";

  return s;

 }

 public static void main(String[] args) {

  System.out.println(getLunar("1990", "8", "26"));

  System.out.println(getLunar("2008", "6", "8"));

  System.out.println(getLunar("2009", "4", "3"));

  System.out.println(getLunar("2011", "11", "22"));

 }