📄 lunarcal.java
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import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
public class LunarCal {
HashMap hashmap = new HashMap();//用来记录的键值对
String lunarDate="";
private static 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"};
int monthlyDate[] = new int[] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
public boolean isLeapYear(int year) {
boolean flag = false;
if ( ( (year % 4 == 0) && (year % 100 != 0) ) || (year % 400 == 0)) {
flag = true;
}
return flag;
}
static SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy-MM-dd");
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 cyclicaly() {
int num = year - 1900 + 36;
return (cyclicalm(num));
}
final public String cyclicalm(){
int num= (year-1900) * 12 + month + 13;
return(cyclicalm(num));
}
final public String cyclicald(long m,int n){
int num=(int)(m/86400000+25567+10);
return (cyclicalm(num+n));
}
public void hashGen(int y) throws ParseException
{
if (isLeapYear(y)==true) {
monthlyDate[1] = 29;
}
for (int i = 1; i <= 12; i++) {
for (int j = 1; j <= monthlyDate[i - 1]; j++) {
Calendar today = Calendar.getInstance();
String ymd=String.valueOf(y)+"-"+String.valueOf(i)+"-"+String.valueOf(j);
today.setTime(chineseDateFormat.parse(ymd));
sun2Lunar(today);
String nularYmd=String.valueOf(year)+"-"+String.valueOf(month)+"-"+String.valueOf(day);
put(nularYmd,ymd);
}
}
//阴历的日期每年都比阳历晚一些，所以要把查询时的阳历下一年的前3个月加上
y=y+1;
if (isLeapYear(y)==true) {
monthlyDate[1] = 29;
}
for (int i = 1; i <= 3; i++) {
for (int j = 1; j <= monthlyDate[i - 1]; j++) {
Calendar today = Calendar.getInstance();
String ymd=String.valueOf(y)+"-"+String.valueOf(i)+"-"+String.valueOf(j);
today.setTime(chineseDateFormat.parse(ymd));
sun2Lunar(today);
String nularYmd=String.valueOf(year)+"-"+String.valueOf(month)+"-"+String.valueOf(day);
put(nularYmd,ymd);
}
}
}
/**
* 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 void sun2Lunar(Calendar cal){
int yearCyl, monCyl, dayCyl;
int leapMonth = 0;
Date baseDate = null;
try {
baseDate = chineseDateFormat.parse("1900-1-31");
} 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 LunarCal(Calendar cal) {
sun2Lunar(cal);
}
public LunarCal(int y, int m, int d) throws ParseException {
hashGen(y);
lunarDate=String.valueOf(y)+"-"+String.valueOf(m)+"-"+String.valueOf(d);
}
public void put(String key, String value) {
if (!hashmap.containsKey(key) && !hashmap.containsValue(value)) {
hashmap.put(key, value);
}
}
public String getSun() {
if (lunarDate == null || lunarDate.trim().equals(""))
return "";
return (String) hashmap.get(lunarDate);
}
public String getLunar() {
return year +"-" + month + "-" + day;
}
}
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