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import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* 注意！此类所得到的农历日期是正确的，但年份是错误的。故，只使用其计算所得的农历日期。 例如： Calendar cal =
* Calendar.getInstance(); cal.set(1973,4,5); Lunar lunar = new Lunar(cal);
* System.out.println(lunar.toString());//计算输出阴历日期
*
* */
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","十二" };
static SimpleDateFormat chineseDateFormat = new SimpleDateFormat(
"yyyy年MM月dd日");
final static long[] lunarInfo = new long[] { 0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x186e3,0x092e0,0x1c8d7,0x0c950,0x1d8a6,0x0b550,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,0x06ca0,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,0x0aea6,0x0ab50,0x04b60,0x0aae4,0x05260,0x0f263,0x05b57,0x096d0,0x04dd5,0x04ad0,0x0d4d4,0x0d558,0x0b5a0,0x195a6,0x049b0,0x0a974,0x0b27a,0x0af46,0x0ab60,0x04af5,0x064b0,0x074a3,0x06b58,0x055c0,0x096d5,0x0c960,0x0d954,0x0da50,0x07552,0x0abb7,0x0cab5,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,0x07954,0x05b52,0x0a6e6,0x0a4e0,0x0ea65,0x0d530,0x05aa0,0x076a3,0x04bd7,0x1d0b6,0x0d520,0x0dd45,0x056d0,0x055b2,0x0a577,0x0aa50,0x1b255,0x06d20,0x0ada0 };
// ====== 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","廿","卅" };
int n = day % 10 == 0 ? 9 : day % 10 - 1;
if (day > 30)
return "";
if (day == 10)
return "初十";
if (day == 20)
return "二十";
if (day == 30)
return "三十";
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 }
*/
}
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