Java 农历算法
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" };
final static String Big_Or_Small[] =
{ "大", "小", "大", "小", "大", "小", "大", "大", "小", "大", "小", "大" };
private String[] LunarHolDayName =
{ "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至",
"小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪",
"冬至" };
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)
{
// cal.add(cal.get(Calendar.DAY_OF_MONTH),1);
@SuppressWarnings(" unused ")
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 /* cyclical() + "年" + */(leap ? "闰" : "")
+ chineseNumber[month - 1] + "月" + getChinaDayString(day);
}
public String numeric_md()
{// 返回阿拉伯数字的阴历日期
String temp_day;
String temp_mon;
temp_mon = month < 10 ? "0" + month : "" + month;
temp_day = day < 10 ? "0" + day : "" + day;
return temp_mon + temp_day;
}
public String get_month()
{// 返回阴历的月份
return chineseNumber[month - 1];
}
public String get_date()
{// 返回阴历的天
return getChinaDayString(day);
}
public String get_Big_Or_Small()
{// 返回的月份的大或小
return Big_Or_Small[month - 1];
}
}
