package com.vci.starter.web.util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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/**
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* 农历转换
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* @author weidy
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* @date
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*/
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public class Lunar {
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/**
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* 年
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*/
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private int year;
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/**
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* 月份
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*/
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private int month;
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/**
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* 天数
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*/
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private int day;
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/**
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*
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*/
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private boolean leap;
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/**
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* 月份
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*/
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final static String chineseNumber[] = { "一", "二", "三", "四", "五", "六", "七",
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"八", "九", "十", "十一", "十二" };
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/**
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* 时间格式
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*/
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static SimpleDateFormat chineseDateFormat = new SimpleDateFormat(
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"yyyy年MM月dd日");
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/**
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* 农历的信息
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*/
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final static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570,
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0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
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0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0,
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0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50,
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0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,
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0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0,
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0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4,
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0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550,
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0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,
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0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,
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0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,
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0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
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0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40,
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0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3,
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0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,
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0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0,
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0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,
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0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0,
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0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65,
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0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0,
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0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2,
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0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 };
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/**
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* ====== 传回农历 y年的总天数
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*/
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final private static int yearDays(int y) {
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int i, sum = 348;
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for (i = 0x8000; i > 0x8; i >>= 1) {
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if ((lunarInfo[y - 1900] & i) != 0) {
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sum += 1;
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}
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}
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return (sum + leapDays(y));
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}
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/**
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* ====== 传回农历 y年闰月的天数
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*/
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final private static int leapDays(int y) {
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if (leapMonth(y) != 0) {
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if ((lunarInfo[y - 1900] & 0x10000) != 0) {
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return 30;
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}
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else {
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return 29;
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}
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} else {
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return 0;
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}
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}
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/**
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* ====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
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*
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*/
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final private static int leapMonth(int y) {
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return (int) (lunarInfo[y - 1900] & 0xf);
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}
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/**
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* ====== 传回农历 y年m月的总天数
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*
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* @param y
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* @param m
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* @return
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*/
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final private static int monthDays(int y, int m) {
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if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0) {
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return 29;
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}
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else {
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return 30;
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}
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}
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// ====== 传回农历 y年的生肖
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final public String animalsYear() {
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final String[] Animals = new String[] { "鼠", "牛", "虎", "兔", "龙", "蛇",
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"马", "羊", "猴", "鸡", "狗", "猪" };
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return Animals[(year - 4) % 12];
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}
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// ====== 传入 月日的offset 传回干支, 0=甲子
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final private static String cyclicalm(int num) {
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final String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊", "己", "庚",
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"辛", "壬", "癸" };
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final String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳", "午",
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"未", "申", "酉", "戌", "亥" };
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return (Gan[num % 10] + Zhi[num % 12]);
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}
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// ====== 传入 offset 传回干支, 0=甲子
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final public String cyclical() {
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int num = year - 1900 + 36;
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return (cyclicalm(num));
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}
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/**
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* 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
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* dayCyl5:与1900年1月31日相差的天数,再加40 ?
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*
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* @param cal
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* @return
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*/
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public Lunar(Calendar cal) {
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@SuppressWarnings("unused")
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int yearCyl, monCyl, dayCyl;
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int leapMonth = 0;
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Date baseDate = null;
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try {
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baseDate = chineseDateFormat.parse("1900年1月31日");
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} catch (ParseException e) {
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e.printStackTrace(); // To change body of catch statement use
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// Options | File Templates.
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}
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// 求出和1900年1月31日相差的天数
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int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
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dayCyl = offset + 40;
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monCyl = 14;
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// 用offset减去每农历年的天数
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// 计算当天是农历第几天
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// i最终结果是农历的年份
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// offset是当年的第几天
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int iYear, daysOfYear = 0;
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for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
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daysOfYear = yearDays(iYear);
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offset -= daysOfYear;
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monCyl += 12;
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}
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if (offset < 0) {
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offset += daysOfYear;
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iYear--;
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monCyl -= 12;
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}
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// 农历年份
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year = iYear;
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yearCyl = iYear - 1864;
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leapMonth = leapMonth(iYear); // 闰哪个月,1-12
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leap = false;
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// 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
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int iMonth, daysOfMonth = 0;
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for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
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// 闰月
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if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
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--iMonth;
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leap = true;
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daysOfMonth = leapDays(year);
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} else {
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daysOfMonth = monthDays(year, iMonth);
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}
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offset -= daysOfMonth;
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// 解除闰月
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if (leap && iMonth == (leapMonth + 1)) {
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leap = false;
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}
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if (!leap) {
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monCyl++;
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}
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}
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// offset为0时，并且刚才计算的月份是闰月，要校正
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if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
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if (leap) {
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leap = false;
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} else {
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leap = true;
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--iMonth;
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--monCyl;
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}
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}
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// offset小于0时，也要校正
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if (offset < 0) {
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offset += daysOfMonth;
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--iMonth;
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--monCyl;
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}
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month = iMonth;
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day = offset + 1;
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}
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public static String getChinaDayString(int day) {
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String chineseTen[] = { "初", "十", "廿", "卅" };
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int n = day % 10 == 0 ? 9 : day % 10 - 1;
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if (day > 30) {
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return "";
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}
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if (day == 10) {
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return "初十";
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}
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else {
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return chineseTen[day / 10] + chineseNumber[n];
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}
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}
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@Override
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public String toString() {
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String m = chineseNumber[month - 1];
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if (m != null && m.trim().equals("一")) {
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m = "正";
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}
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if (m != null && m.trim().equals("十一")) {
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m = "冬";
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}
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if (m != null && m.trim().equals("十二")) {
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m = "腊";
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}
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return year + cyclical() + animalsYear() + "年" + (leap ? "闰" : "") + m
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+ "月" + getChinaDayString(day);
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}
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public String getDate() {
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String m = chineseNumber[month - 1];
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if (m != null && m.trim().equals("一")) {
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m = "正";
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}
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if (m != null && m.trim().equals("十一")) {
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m = "冬";
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}
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if (m != null && m.trim().equals("十二")) {
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m = "腊";
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}
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// cyclical() +
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return animalsYear() + "年" + (leap ? "闰" : "") + m + "月"
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+ getChinaDayString(day);
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}
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public static void main(String[] args) throws ParseException {
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Calendar today = Calendar.getInstance();
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today.setTime(chineseDateFormat.parse("2013年2月1日"));
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Lunar lunar = new Lunar(today);
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System.out.println(lunar.toString());
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System.out.println("北京时间：" + chineseDateFormat.format(today.getTime())
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+ " 农历" + lunar);
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}
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}
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