package com.othershe.calendarview.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
public class LunarUtil {
//1900-2049
private static final int[] LUNAR_INFO = {
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
};
private static final int[] solarTermInfo = {
0, 21208, 42467, 63836, 85337, 107014, 128867, 150921,
173149, 195551, 218072, 240693, 263343, 285989, 308563, 331033,
353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758
};
private static final String[] solarTerm = {
"小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至",
"小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至"};
private static final String[] monthInfo = new String[]{"", "正月", "二月", "三月", "四月", "五月",
"六月", "七月", "八月", "九月", "十月", "冬月", "腊月"};
private static final String[] dayInfo = new String[]{"", "一", "二", "三", "四", "五", "六", "七", "八", "九"};
// 允许输入的最小年份
private final static int MIN_YEAR = 1900;
// 允许输入的最大年份
private final static int MAX_YEAR = 2049;
// 阳历日期计算起点
private final static String START_DATE = "19000130";
/**
* 阳历转阴历
*
* @param year
* @param month
* @param day
* @return
*/
public static String[] solarToLunar(int year, int month, int day) {
int i;
int temp = 0;
int lunarYear;
int lunarMonth; //农历月份
int lunarDay; //农历当月第几天
boolean leapMonthFlag = false;
String solarDate = "" + year;
if (month < 10) {
solarDate = solarDate + "0" + month;
} else {
solarDate = solarDate + month;
}
if (day < 10) {
solarDate = solarDate + "0" + day;
} else {
solarDate = solarDate + day;
}
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
Date myDate = null;
Date startDate = null;
try {
myDate = formatter.parse(solarDate);
startDate = formatter.parse(START_DATE);
} catch (ParseException e) {
e.printStackTrace();
}
int offset = daysBetween(startDate, myDate);
for (i = MIN_YEAR; i <= MAX_YEAR; i++) {
temp = getYearDays(i); //求当年农历年天数
if (offset - temp < 1) {
break;
} else {
offset -= temp;
}
}
lunarYear = i;
int leapMonth = getLeapMonth(lunarYear);//计算该年闰哪个月
//设定当年是否有闰月
boolean isLeapYear;
if (leapMonth > 0) {
isLeapYear = true;
} else {
isLeapYear = false;
}
for (i = 1; i <= 12; i++) {
if (i == leapMonth + 1 && isLeapYear) {
temp = getLeapMonthDays(lunarYear);
isLeapYear = false;
leapMonthFlag = true;
i--;
} else {
try {
temp = getMonthDays(lunarYear, i);
} catch (Exception e) {
e.printStackTrace();
}
}
offset -= temp;
if (offset <= 0) {
break;
}
}
offset += temp;
lunarMonth = i;
lunarDay = offset;
return new String[]{(leapMonthFlag & (lunarMonth == leapMonth) ? "闰" : "") + getLunarMonth(lunarMonth),
getLunarDay(lunarDay), getLunarHoliday(lunarYear, lunarMonth, lunarDay)};
}
/**
* 计算阴历年 月的天数
*
* @param lunarYear 阴历年
* @param month 阴历月
* @return 该月天数
*/
private static int getMonthDays(int lunarYear, int month) throws Exception {
if ((month > 31) || (month < 0)) {
throw (new Exception("月份有错！"));
}
int bit = 1 << (16 - month);
if (((LUNAR_INFO[lunarYear - 1900] & 0x0FFFF) & bit) == 0) {
return 29;
} else {
return 30;
}
}
/**
* 计算两个阳历日期相差的天数。
*
* @param startDate 开始时间
* @param endDate 截至时间
* @return 天数
*/
private static int daysBetween(Date startDate, Date endDate) {
int days = 0;
//将转换的两个时间对象转换成Calendar对象
Calendar can1 = Calendar.getInstance();
can1.setTime(startDate);
Calendar can2 = Calendar.getInstance();
can2.setTime(endDate);
//拿出两个年份
int year1 = can1.get(Calendar.YEAR);
int year2 = can2.get(Calendar.YEAR);
//天数
Calendar can = null;
//如果can1 < can2
//减去小的时间在这一年已经过了的天数
//加上大的时间已过的天数
if (can1.before(can2)) {
days -= can1.get(Calendar.DAY_OF_YEAR);
days += can2.get(Calendar.DAY_OF_YEAR);
can = can1;
} else {
days -= can2.get(Calendar.DAY_OF_YEAR);
days += can1.get(Calendar.DAY_OF_YEAR);
can = can2;
}
for (int i = 0; i < Math.abs(year2 - year1); i++) {
//获取小的时间当前年的总天数
days += can.getActualMaximum(Calendar.DAY_OF_YEAR);
//再计算下一年。
can.add(Calendar.YEAR, 1);
}
return days;
}
/**
* 计算阴历年的总天数
*
* @param year 阴历年
* @return 总天数
*/
private static int getYearDays(int year) {
int sum = 29 * 12;
for (int i = 0x8000; i >= 0x8; i >>= 1) {
if ((LUNAR_INFO[year - 1900] & 0xfff0 & i) != 0) {
sum++;
}
}
return sum + getLeapMonthDays(year);
}
/**
* 计算阴历年闰月多少天
*
* @param year 阴历年
* @return 天数
*/
private static int getLeapMonthDays(int year) {
if (getLeapMonth(year) != 0) {
if ((LUNAR_INFO[year - MIN_YEAR] & 0xf0000) == 0) {
return 29;
} else {
return 30;
}
} else {
return 0;
}
}
/**
* 计算阴历年闰哪个月 1-12 , 没闰传回 0
*
* @param year 阴历年
* @return 月份
*/
private static int getLeapMonth(int year) {
return LUNAR_INFO[year - 1900] & 0xf;
}
private static String getLunarMonth(int month) {
return monthInfo[month];
}
private static String getLunarDay(int day) {
if (day == 10) {
return "初十";
} else if (day == 20) {
return "二十";
} else if (day == 30) {
return "三十";
}
String str1 = "";
int d1 = day / 10;
if (d1 == 0) {
str1 = "初";
} else if (d1 == 1) {
str1 = "十";
} else if (d1 == 2) {
str1 = "廿";
} else if (d1 == 3) {
str1 = "卅";
}
return str1 + dayInfo[day % 10];
}
/**
* 计算农历节日
*
* @param year
* @param month
* @param day
* @return
*/
private static String getLunarHoliday(int year, int month, int day) {
String holiday = "";
if (month == 1 && day == 1) {
holiday = "春节";
} else if (month == 1 && day == 15) {
holiday = "元宵节";
} else if (month == 2 && day == 2) {
holiday = "龙抬头";
} else if (month == 5 && day == 5) {
holiday = "端午节";
} else if (month == 7 && day == 7) {
holiday = "七夕";
} else if (month == 8 && day == 15) {
holiday = "中秋节";
} else if (month == 9 && day == 9) {
holiday = "重阳节";
} else if (month == 12 && day == 8) {
holiday = "腊八";
} else if (month == 12 && day == 23) {
holiday = "小年";
} else {
if (month == 12) {
if ((((daysInLunarMonth(year, month) == 29) && day == 29))
|| ((((daysInLunarMonth(year, month) == 30) && day == 30)))) {
holiday = "除夕";
}
}
}
return holiday;
}
public static int daysInLunarMonth(int year, int month) {
if ((LUNAR_INFO[year - MIN_YEAR] & (0x10000 >> month)) == 0)
return 29;
else
return 30;
}
private static GregorianCalendar utcCal = null;
/**
* 根据阳历日期计算24节气
*/
public static String getTermString(int solarYear, int solarMonth, int solarDay) {
String termString = "";
if (getSolarTermDay(solarYear, solarMonth * 2) == solarDay) {
termString = solarTerm[solarMonth * 2];
} else if (getSolarTermDay(solarYear, solarMonth * 2 + 1) == solarDay) {
termString = solarTerm[solarMonth * 2 + 1];
}
return termString;
}
private static int getSolarTermDay(int solarYear, int index) {
return getUTCDay(getSolarTermCalendar(solarYear, index));
}
private static Date getSolarTermCalendar(int solarYear, int index) {
long l = (long) 31556925974.7 * (solarYear - 1900)
+ solarTermInfo[index] * 60000L;
l = l + UTC(1900, 0, 6, 2, 5, 0);
return new Date(l);
}
private static synchronized int getUTCDay(Date date) {
makeUTCCalendar();
synchronized (utcCal) {
utcCal.clear();
utcCal.setTimeInMillis(date.getTime());
return utcCal.get(java.util.Calendar.DAY_OF_MONTH);
}
}
private static void makeUTCCalendar() {
if (utcCal == null) {
utcCal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
}
}
private static synchronized long UTC(int y, int m, int d, int h, int min, int sec) {
makeUTCCalendar();
synchronized (utcCal) {
utcCal.clear();
utcCal.set(y, m, d, h, min, sec);
return utcCal.getTimeInMillis();
}
}
/**计算24节气结束*/
}
