Java给定公历日期计算相应农历/阴历日期

骑猪看日落 2023-10-16 21:07 40阅读 0赞

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", "二", "三", "四", "五", "六", "七",
    			"八", "九", "十", "十一", "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,
    			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 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", "十", "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 }
    	 */
    
    }