club.zhcs.utils.LunarCalendar Maven / Gradle / Ivy
package club.zhcs.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import org.nutz.log.Logs;
/**
* 农历(阴历)工具类
*
* @author Ixion
*
* create at 2014年9月9日
*/
public class LunarCalendar {
// ====== 传入 月日的offset 传回干支, 0=甲子
public static final 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]);
}
private static Calendar date2calendar(Date date) {
Calendar tmpCale = Calendar.getInstance();
tmpCale.setTime(date);
return tmpCale;
}
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] + CHINESE_NUMBER[n];
}
}
// ====== 传回农历 y年闰月的天数
private static final int leapDays(int y) {
if (leapMonth(y) != 0) {
if ((LUNAR_INFO[y - 1900] & 0x10000) != 0) {
return 30;
} else {
return 29;
}
}
return 0;
}
// ====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
private static final int leapMonth(int y) {
return (int) (LUNAR_INFO[y - 1900] & 0xf);
}
// ====== 传回农历 y年m月的总天数
private static final int monthDays(int y, int m) {
if ((LUNAR_INFO[y - 1900] & (0x10000 >> m)) == 0) {
return 29;
} else {
return 30;
}
}
// ====== 传回农历 y年的总天数
private static final int yearDays(int y) {
int sum = 348;
for (int i = 0x8000; i > 0x8; i >>= 1) {
if ((LUNAR_INFO[y - 1900] & i) != 0) {
sum += 1;
}
}
return (sum + leapDays(y));
}
private int year;// 农历年
private int month;// 农历月
private int day;// 农历日
private boolean leap;// 农历闰年
/**
* 中文月名称
*/
static final String[] CHINESE_NUMBER = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };
static final String[] NUMBERS = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
/**
* 中文日期格式
*/
private SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy年MM月dd日");
/**
* 农历数据， 1901 ~ 2100 年之间正确
*/
static final long[] LUNAR_INFO = 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 };
/**
* 构造一个表示当前日期的农历日历
*/
public LunarCalendar() {
this(Calendar.getInstance());
}
/**
* 使用指定日历日期构造一个农历日历
*
* @param cal 日历
*/
public LunarCalendar(Calendar cal) {
int leapMonth = 0;
Date baseDate = null;
try {
baseDate = chineseDateFormat.parse("1900年1月31日");
} catch (ParseException e) {
Logs.get().debug(e);
}
// 求出和1900年1月31日相差的天数
int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
// 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 = 0;
int daysOfYear = 0;
for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
daysOfYear = yearDays(iYear);
offset -= daysOfYear;
}
if (offset < 0) {
offset += daysOfYear;
iYear--;
}
// 农历年份
year = iYear;
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 = 0;
int 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;
}
}
// 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;
}
}
// offset小于0时，也要校正
if (offset < 0) {
offset += daysOfMonth;
--iMonth;
}
month = iMonth;
day = offset + 1;
}
public LunarCalendar(Date date) {
this(date2calendar(date));
}
// ====== 传回农历 y年的生肖
public final 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 offset 传回干支, 0=甲子
public final String cyclical() {
int num = year - 1900 + 36;
return (cyclicalm(num));
}
/**
* 获得表示农历年月日的日期对象
*
* @return 日期
*/
public Date getDate() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month - 1);
calendar.set(Calendar.DAY_OF_MONTH, day);
return calendar.getTime();
}
private String toCharector(int year) {
StringBuilder target = new StringBuilder();
while (year != 0) {
int index = year % 10;
year = year / 10;
target.append(NUMBERS[index]);
}
return target.reverse().toString();
}
@Override
public String toString() {
return "农历 " + toCharector(year) + "(" + cyclical() + "/" + animalsYear() + ")年" + (leap ? "闰" : "")
+ CHINESE_NUMBER[month - 1] + "月" + getChinaDayString(day);
}
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