package com.xhinliang.lunarcalendar;
import com.xhinliang.lunarcalendar.utils.SolarTerm;
import com.xhinliang.lunarcalendar.utils.TextUtils;
import java.util.Calendar;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
/**
* 中国月历
* Calendar of China
*
* @author xhinliang
*/
class DPCNCalendar {
private DPCNCalendar() {
}
static final int NOT_A_DAY = -1;
private static final int[] FIRST_DAY_OF_LUNAR_IN_GREGORIAN = {1897, 0x75aa, 0x156a, 0x1096d, 0x95c, 0x14ae, 0xaa4d, 0x1a4c, 0x1b2a, 0x8d55, 0xad4, 0x135a, 0x495d, 0x95c, 0xd49b, 0x149a, 0x1a4a, 0xbaa5, 0x16a8, 0x1ad4, 0x52da, 0x12b6, 0xe937, 0x92e, 0x1496, 0xb64b, 0xd4a, 0xda8, 0x95b5, 0x56c, 0x12ae, 0x492f, 0x92e, 0xcc96, 0x1a94, 0x1d4a, 0xada9, 0xb5a, 0x56c, 0x726e, 0x125c, 0xf92d, 0x192a, 0x1a94, 0xdb4a, 0x16aa, 0xad4, 0x955b, 0x4ba, 0x125a, 0x592b, 0x152a, 0xf695, 0xd94, 0x16aa, 0xaab5, 0x9b4, 0x14b6, 0x6a57, 0xa56, 0x1152a, 0x1d2a, 0xd54, 0xd5aa, 0x156a, 0x96c, 0x94ae, 0x14ae, 0xa4c, 0x7d26, 0x1b2a, 0xeb55, 0xad4, 0x12da, 0xa95d, 0x95a, 0x149a, 0x9a4d, 0x1a4a, 0x11aa5, 0x16a8, 0x16d4, 0xd2da, 0x12b6, 0x936, 0x9497, 0x1496, 0x1564b, 0xd4a, 0xda8, 0xd5b4, 0x156c, 0x12ae, 0xa92f, 0x92e, 0xc96, 0x6d4a, 0x1d4a, 0x10d65, 0xb58, 0x156c, 0xb26d, 0x125c, 0x192c, 0x9a95, 0x1a94, 0x1b4a, 0x4b55, 0xad4, 0xf55b, 0x4ba, 0x125a, 0xb92b, 0x152a, 0x1694, 0x96aa, 0x15aa, 0x12ab5, 0x974, 0x14b6, 0xca57, 0xa56, 0x1526, 0x8e95, 0xd54, 0x15aa, 0x49b5, 0x96c, 0xd4ae, 0x149c, 0x1a4c, 0xbd26, 0x1aa6, 0xb54, 0x6d6a, 0x12da, 0x1695d, 0x95a, 0x149a, 0xda4b, 0x1a4a, 0x1aa4, 0xbb54, 0x16b4, 0xada, 0x495b, 0x936, 0xf497, 0x1496, 0x154a, 0xb6a5, 0xda4, 0x15b4, 0x6ab6, 0x126e, 0x1092f, 0x92e, 0xc96, 0xcd4a, 0x1d4a, 0xd64, 0x956c, 0x155c, 0x125c, 0x792e, 0x192c, 0xfa95, 0x1a94, 0x1b4a, 0xab55, 0xad4, 0x14da, 0x8a5d, 0xa5a, 0x1152b, 0x152a, 0x1694, 0xd6aa, 0x15aa, 0xab4, 0x94ba, 0x14b6, 0xa56, 0x7527, 0xd26, 0xee53, 0xd54, 0x15aa, 0xa9b5, 0x96c, 0x14ae, 0x8a4e, 0x1a4c, 0x11d26, 0x1aa4, 0x1b54, 0xcd6a, 0xada, 0x95c, 0x949d, 0x149a, 0x1a2a, 0x5b25, 0x1aa4, 0xfb52};
private static final int[] DAYS_AND_LEAP_MONTH_OF_LUNAR = {1897, 0xed436, 0xed64a, 0xed83f, 0xeda53, 0xedc48, 0xede3d, 0xee050, 0xee244, 0xee439, 0xee64d, 0xee842, 0xeea36, 0xeec4a, 0xeee3e, 0xef052, 0xef246, 0xef43a, 0xef64e, 0xef843, 0xefa37, 0xefc4b, 0xefe41, 0xf0054, 0xf0248, 0xf043c, 0xf0650, 0xf0845, 0xf0a38, 0xf0c4d, 0xf0e42, 0xf1037, 0xf124a, 0xf143e, 0xf1651, 0xf1846, 0xf1a3a, 0xf1c4e, 0xf1e44, 0xf2038, 0xf224b, 0xf243f, 0xf2653, 0xf2848, 0xf2a3b, 0xf2c4f, 0xf2e45, 0xf3039, 0xf324d, 0xf3442, 0xf3636, 0xf384a, 0xf3a3d, 0xf3c51, 0xf3e46, 0xf403b, 0xf424e, 0xf4443, 0xf4638, 0xf484c, 0xf4a3f, 0xf4c52, 0xf4e48, 0xf503c, 0xf524f, 0xf5445, 0xf5639, 0xf584d, 0xf5a42, 0xf5c35, 0xf5e49, 0xf603e, 0xf6251, 0xf6446, 0xf663b, 0xf684f, 0xf6a43, 0xf6c37, 0xf6e4b, 0xf703f, 0xf7252, 0xf7447, 0xf763c, 0xf7850, 0xf7a45, 0xf7c39, 0xf7e4d, 0xf8042, 0xf8254, 0xf8449, 0xf863d, 0xf8851, 0xf8a46, 0xf8c3b, 0xf8e4f, 0xf9044, 0xf9237, 0xf944a, 0xf963f, 0xf9853, 0xf9a47, 0xf9c3c, 0xf9e50, 0xfa045, 0xfa238, 0xfa44c, 0xfa641, 0xfa836, 0xfaa49, 0xfac3d, 0xfae52, 0xfb047, 0xfb23a, 0xfb44e, 0xfb643, 0xfb837, 0xfba4a, 0xfbc3f, 0xfbe53, 0xfc048, 0xfc23c, 0xfc450, 0xfc645, 0xfc839, 0xfca4c, 0xfcc41, 0xfce36, 0xfd04a, 0xfd23d, 0xfd451, 0xfd646, 0xfd83a, 0xfda4d, 0xfdc43, 0xfde37, 0xfe04b, 0xfe23f, 0xfe453, 0xfe648, 0xfe83c, 0xfea4f, 0xfec44, 0xfee38, 0xff04c, 0xff241, 0xff436, 0xff64a, 0xff83e, 0xffa51, 0xffc46, 0xffe3a, 0x10004e, 0x100242, 0x100437, 0x10064b, 0x100841, 0x100a53, 0x100c48, 0x100e3c, 0x10104f, 0x101244, 0x101438, 0x10164c, 0x101842, 0x101a35, 0x101c49, 0x101e3d, 0x102051, 0x102245, 0x10243a, 0x10264e, 0x102843, 0x102a37, 0x102c4b, 0x102e3f, 0x103053, 0x103247, 0x10343b, 0x10364f, 0x103845, 0x103a38, 0x103c4c, 0x103e42, 0x104036, 0x104249, 0x10443d, 0x104651, 0x104846, 0x104a3a, 0x104c4e, 0x104e43, 0x105038, 0x10524a, 0x10543e, 0x105652, 0x105847, 0x105a3b, 0x105c4f, 0x105e45, 0x106039, 0x10624c, 0x106441, 0x106635, 0x106849, 0x106a3d};
private static final Calendar calendar = Calendar.getInstance();
private static final String[][] FESTIVAL_GREGORIAN = {
{"元旦"},
{"世界湿地日", "情人节"},
{"全国爱耳日", "青年志愿者服务日", "国际妇女节", "保护母亲河日", "中国植树节", "白色情人节&国际警察日", "世界消费者权益日", "世界森林日&世界睡眠日", "世界水日", "世界气象日", "世界防治结核病日"},
{"愚人节", "清明节", "世界卫生日", "世界地球日", "世界知识产权日"},
{"国际劳动节", "世界哮喘日", "中国青年节", "世界红十字日", "国际护士节", "国际家庭日", "世界电信日", "全国学生营养日", "国际生物多样性日", "国际牛奶日", "世界无烟日"},
{"国际儿童节", "世界环境日", "全国爱眼日", "世界防治荒漠化日", "国际奥林匹克日", "全国土地日", "国际禁毒日"},
{"中国共产党诞生日&国际建筑日", "中国抗战纪念日", "世界人口日"},
{"中国解放军建军节", "国际青年节"},
{"抗战胜利日", "国际扫盲日", "中国教师节", "中国脑健康日&臭氧层保护日", "全国爱牙日", "世界停火日", "世界旅游日"},
{"国庆节&国际老年人日", "世界动物日", "世界教师日", "全国高血压日", "世界邮政日", "世界精神卫生日", "世界标准日", "国际盲人节&世界农村妇女日", "世界粮食日", "国际消除贫困日", "联合国日&世界发展新闻日", "中国男性健康日", "万圣节"},
{"中国记者节", "消防宣传日", "世界糖尿病日", "国际大学生节", "消除对妇女暴力日"},
{"世界爱滋病日", "世界残疾人日", "全国法制宣传日", "世界足球日", "圣诞节"}};
private static final int[][] FESTIVAL_G_DATE = {
{1},
{2, 14},
{3, 5, 8, 9, 12, 14, 15, 21, 22, 23, 24},
{1, 5, 7, 22, 26},
{1, 3, 4, 8, 12, 15, 17, 20, 22, 23, 31},
{1, 5, 6, 17, 23, 25, 26},
{1, 7, 11},
{1, 12},
{3, 8, 10, 16, 20, 21, 27},
{1, 4, 5, 8, 9, 10, 14, 15, 16, 17, 24, 29, 31},
{8, 9, 14, 17, 25},
{1, 3, 4, 9, 25}};
// 在农历的节日的节点的名字，与下一个二维数组一一对应
private static final String[][] FESTIVAL_L = {
{"春节", "元宵"},
{},
{},
{},
{"端午"},
{},
{"乞巧"},
{"中秋"},
{"重阳"},
{},
{},
{"腊八", "扫房", "除夕"}};
// 在农历的节日的节点
private static final int[][] FESTIVAL_LUNAR_DATE = {
{1, 15},
{},
{},
{},
{5},
{},
{7},
{15},
{9},
{},
{},
{8, 24, 30}};
private static final String[][] SOLAR_TERM = {
{"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"}
};
// 计算二十四节气需要运算量太大，将前面的结果保存起来，加速后面的计算
private static final HashMap<Integer, String[][]> CACHE_SOLAR_TERM = new HashMap<>();
private static final SolarTerm mSolarTerm = new SolarTerm();
/**
* 获得农历
*
* @param year 公历年
* @param month 月
* @param day 日
* @return 农历
*/
static Lunar getLunar(int year, int month, int day) {
Gregorian gregorian = new Gregorian(year, month, day);
return gregorianToLunar(gregorian);
}
/**
* 获取某年某月的节日列表
*
* @param year 年
* @param month 月
* @return 节日Set
*/
static Festivals[][] buildMonthFestivals(int year, int month) {
int[][] gregorianMonth = buildMonthGregorian(year, month);
Gregorian gregorian = new Gregorian(2000, 1, 1);
Festivals[][] tmp = new Festivals[6][7];
for (int i = 0; i < tmp.length; i++) {
for (int j = 0; j < tmp[0].length; j++) {
if (gregorianMonth[i][j] == NOT_A_DAY) {
continue;
}
tmp[i][j] = new Festivals();
gregorian.reset(year, month, gregorianMonth[i][j]);
Lunar lunar = gregorianToLunar(gregorian);
// 农历节日
String result = getFestivalLunar(lunar);
if (TextUtils.isNotEmpty(result)) {
tmp[i][j].add(result);
}
// 公立节日
result = getFestivalGregorian(gregorian);
if (TextUtils.isNotEmpty(result)) {
tmp[i][j].add(result);
}
// 二十四节气
result = getSolarTerm(year, month, gregorian.day);
if (TextUtils.isNotEmpty(result)) {
tmp[i][j].add(result);
}
}
}
return tmp;
}
/**
* 获取某年某月的节日列表
*
* @param year 年
* @param month 月
* @return 节日Set
*/
static Festivals buildDayFestivals(int year, int month, int day) {
Gregorian gregorian = new Gregorian(year, month, day);
Festivals festivals = new Festivals();
gregorian.reset(year, month, day);
Lunar lunar = gregorianToLunar(gregorian);
// 农历节日
String result = getFestivalLunar(lunar);
if (TextUtils.isNotEmpty(result)) {
festivals.add(result);
}
// 公立节日
result = getFestivalGregorian(gregorian);
if (TextUtils.isNotEmpty(result)) {
festivals.add(result);
}
// 二十四节气
result = getSolarTerm(year, month, gregorian.day);
if (TextUtils.isNotEmpty(result)) {
festivals.add(result);
}
return festivals;
}
/**
* 获取农历二十四节气
*
* @param year 年
* @param month 月
* @param day 日
* @return 节气名字
*/
static String getSolarTerm(int year, int month, int day) {
String[][] tmp = CACHE_SOLAR_TERM.get(year);
if (null == tmp) {
tmp = mSolarTerm.buildSolarTerm(year);
CACHE_SOLAR_TERM.put(year, tmp);
}
String[] stOfMonth = tmp[month - 1];
if (Integer.valueOf(stOfMonth[0]) == day) {
return SOLAR_TERM[month - 1][0];
}
if (Integer.valueOf(stOfMonth[1]) == day) {
return SOLAR_TERM[month - 1][1];
}
return null;
}
/**
* 获取农历节日
*
* @param lunar 农历
* @return 节日名称
*/
private static String getFestivalLunar(Lunar lunar) {
int[] daysInMonth = FESTIVAL_LUNAR_DATE[lunar.month - 1];
for (int i = 0; i < daysInMonth.length; i++) {
if (lunar.day == daysInMonth[i]) {
return FESTIVAL_L[lunar.month - 1][i];
}
}
return null;
}
/**
* 获取公历节日
*
* @param gregorian 公历
* @return 节日名
*/
private static String getFestivalGregorian(Gregorian gregorian) {
int[] daysInMonth = FESTIVAL_G_DATE[gregorian.month - 1];
for (int i = 0; i < daysInMonth.length; i++) {
if (gregorian.day == daysInMonth[i]) {
return FESTIVAL_GREGORIAN[gregorian.month - 1][i];
}
}
return null;
}
/**
* 将公历转成农历
*
* @param gregorian 公历
* @return 农历
*/
private static Lunar gregorianToLunar(Gregorian gregorian) {
int index = gregorian.year - DAYS_AND_LEAP_MONTH_OF_LUNAR[0];
int data = (gregorian.year << 9) | (gregorian.month << 5) | (gregorian.day);
if (DAYS_AND_LEAP_MONTH_OF_LUNAR[index] > data) {
index--;
}
int lunarFirstDayInGregorian = DAYS_AND_LEAP_MONTH_OF_LUNAR[index];
int y = getBitInt(lunarFirstDayInGregorian, 12, 9);
int m = getBitInt(lunarFirstDayInGregorian, 4, 5);
int d = getBitInt(lunarFirstDayInGregorian, 5, 0);
long offset = gregorianToNum(gregorian.year, gregorian.month, gregorian.day) - gregorianToNum(y, m, d);
int days = FIRST_DAY_OF_LUNAR_IN_GREGORIAN[index];
int leap = getBitInt(days, 4, 13);
int lunarY = index + DAYS_AND_LEAP_MONTH_OF_LUNAR[0];
int lunarM = 1;
int lunarD;
offset += 1;
for (int i = 0; i < 13; i++) {
int dm = getBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
if (offset <= dm) {
break;
}
lunarM++;
offset -= dm;
}
lunarD = (int) offset;
Lunar lunar = new Lunar(lunarY, lunarM, lunarD);
lunar.isLeap = false;
if (leap != 0 && lunarM > leap) {
lunar.month = lunarM - 1;
if (lunarM == leap + 1) {
lunar.isLeap = true;
}
}
return lunar;
}
/**
* 判断某年是否为闰年
*
* @param year ...
* @return true表示闰年
*/
private static boolean isLeapYear(int year) {
return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
}
/**
* 判断给定日期是否为今天
*
* @param day 某天
* @return ...
*/
static boolean isToday(LunarCalendar day) {
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
//January = 0
//noinspection MagicConstant
c1.set(day.getYear(), day.getMonth() - 1, day.getDay());
return (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR)) &&
(c1.get(Calendar.MONTH) == (c2.get(Calendar.MONTH))) &&
(c1.get(Calendar.DAY_OF_MONTH) == c2.get(Calendar.DAY_OF_MONTH));
}
/**
* 生成某年某月的公历天数数组
* 数组为6x7的二维数组因为一个月的周数永远不会超过六周
* 天数填充对应相应的二维数组下标
* 如果某个数组下标中没有对应天数那么则填充一个空字符串
*
* @param year 某年
* @param month 某月
* @return 某年某月的公历天数数组
*/
static int[][] buildMonthGregorian(int year, int month) {
calendar.clear();
int[][] tmp = new int[6][7];
//Calender.January = 0
//noinspection MagicConstant
calendar.set(year, month - 1, 1);
int daysInMonth = getDaysInMonth(year, month);
int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK) - Calendar.SUNDAY;
int day = 1;
for (int i = 0; i < 6; i++) {
for (int j = 0; j < Calendar.DAY_OF_WEEK; j++) {
tmp[i][j] = NOT_A_DAY;
if (i == 0 && j >= dayOfWeek) {
tmp[i][j] = day;
day++;
continue;
}
if (i > 0 && day <= daysInMonth) {
tmp[i][j] = day;
day++;
}
}
}
return tmp;
}
/**
* 返回某年某月的天数
*
* @param year 年
* @param month 月
* @return 天数
*/
private static int getDaysInMonth(int year, int month) {
if (month == 4 || month == 6 || month == 9 || month == 11) {
return 30;
}
if (month == 2) {
if (isLeapYear(year)) {
return 29;
}
return 28;
}
// 其他全是大月
return 31;
}
/**
* 生成公历某年某月的周末日期集合
*
* @param year 某年
* @param month 某月
* @return 某年某月的周末日期集合
*/
static Set<Integer> buildMonthWeekend(int year, int month) {
Set<Integer> set = new HashSet<>();
calendar.clear();
//noinspection MagicConstant
calendar.set(year, month - 1, 1);
do {
int day = calendar.get(Calendar.DAY_OF_WEEK);
if (day == Calendar.SATURDAY || day == Calendar.SUNDAY) {
set.add(calendar.get(Calendar.DAY_OF_MONTH));
}
calendar.add(Calendar.DAY_OF_YEAR, 1);
} while (calendar.get(Calendar.MONTH) == month - 1);
return set;
}
/**
* 将公立日期转成long格式的时间戳
*
* @param year 年
* @param month 月
* @param day 日
* @return 时间
*/
private static long gregorianToNum(int year, int month, int day) {
month = (month + 9) % 12;
year = year - month / 10;
return 365 * year + year / 4 - year / 100 + year / 400 + (month * 306 + 5) / 10 + (day - 1);
}
/**
* 将原来的二进制数截取一部分之后，向最低位位移
*
* @param data 原来的二进制数
* @param length 要截取的二进制数长度
* @param shift 要截取的二进制数从低位向高位的偏移量
* @return 截取到的二进制数
*/
private static int getBitInt(int data, int length, int shift) {
return (data & (((1 << length) - 1) << shift)) >> shift;
}
}
