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java 常用工具类,作为 apache-commons的补充
package com.centit.support.algorithm;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
@SuppressWarnings("unused")
public class Lunar {
private int year;
private int month;
private int day;
private boolean leap;
private static final String chineseNumber[] = { "一", "二", "三", "四", "五", "六", "七",
"八", "九", "十", "十一", "十二" };
/*private 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) {
int yno = num - 4;
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[yno % 10] + Zhi[yno % 12]);
}
// ====== 传入 offset 传回干支, 0=甲子
final public String cyclical() {
int num = year - 1900 + 36;
return (cyclicalm(num));
}
public Lunar() {
year = 2009;
month = 6;
day = 18;
}
public Lunar(Calendar cal) {
setCalendar(cal);
}
public Lunar(Date dt) {
setDate(dt);
}
public void setDate(Date dt) {
Calendar cal = new GregorianCalendar();
cal.setTime(dt);
setCalendar(cal);
}
/*
* 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 ?
*/
public void setCalendar(Calendar cal) {
int leapMonth = 0;
Date baseDate = DatetimeOpt.createUtilDate(1900,1,31);
/* try {
baseDate = chineseDateFormat.parse("1900年1月31日");
} catch (ParseException e) {
logger.error(e.getMessage(),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);
// int dayCyl = offset + 40;
// int 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;
// int 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 int getYear() {
return year;
}
public int getMonth() {
return month;
}
public int getDay() {
return day;
}
public boolean isLeap() {
return leap;
}
public String toString() {
return cyclicalm(year) + "年" + (leap ? "闰" : "")
+ chineseNumber[month - 1] + "月" + getChinaDayString(day);
}
public String getLunarDay() {
return getChinaDayString(day);
}
public String getLunarMonth() {
return (leap ? "闰" : "")+chineseNumber[month - 1] + "月" ;
}
public String getLunarYear() {
return cyclicalm(year)+ "年";
}
}