465 lines
17 KiB
C#
465 lines
17 KiB
C#
using System;
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using System.Globalization;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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namespace MES.Utility.Core
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{
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/// <summary>
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/// ChineseDateTime
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/// 一日有十二时辰，一时辰有四刻，一刻有三盏茶，一盏茶有两柱香
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/// 一柱香有五分，一分有六弹指，一弹指有十刹那，一刹那为一念
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/// </summary>
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public class ChineseDateTime
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{
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#region ====== 内部常量 ======
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private readonly ChineseLunisolarCalendar _chineseDateTime;
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private readonly DateTime _dateTime;
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private readonly int _serialMonth;
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private static readonly string[] _chineseNumber = { "〇", "一", "二", "三", "四", "五", "六", "七", "八", "九" };
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private static readonly string[] _chineseMonth =
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{
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"正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬", "腊"
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};
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private static readonly string[] _chineseDay =
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{
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"初一", "初二", "初三", "初四", "初五", "初六", "初七", "初八", "初九", "初十",
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"十一", "十二", "十三", "十四", "十五", "十六", "十七", "十八", "十九", "二十",
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"廿一", "廿二", "廿三", "廿四", "廿五", "廿六", "廿七", "廿八", "廿九", "三十"
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};
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private static readonly string[] _chineseWeek =
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{
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"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"
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};
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private static readonly string[] _celestialStem = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
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private static readonly string[] _terrestrialBranch = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
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private static readonly string[] _chineseZodiac = { "鼠", "牛", "虎", "免", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
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private static readonly string[] _solarTerm =
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{
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"小寒", "大寒", "立春", "雨水", "惊蛰", "春分",
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"清明", "谷雨", "立夏", "小满", "芒种", "夏至",
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"小暑", "大暑", "立秋", "处暑", "白露", "秋分",
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"寒露", "霜降", "立冬", "小雪", "大雪", "冬至"
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};
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private static readonly int[] _solarTermInfo = {
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0, 21208, 42467, 63836, 85337, 107014, 128867, 150921, 173149, 195551, 218072, 240693, 263343, 285989,
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308563, 331033, 353350, 375494, 397447, 419210, 440795, 462224, 483532, 504758
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};
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#endregion
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#region ======= 构建日期 ======
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public ChineseDateTime(DateTime dateTime)
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{
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_chineseDateTime = new ChineseLunisolarCalendar();
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if (dateTime < _chineseDateTime.MinSupportedDateTime || dateTime > _chineseDateTime.MaxSupportedDateTime)
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{
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throw new ArgumentOutOfRangeException(
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$"参数日期不在有效的范围内：只支持{_chineseDateTime.MinSupportedDateTime.ToShortTimeString()}到{_chineseDateTime.MaxSupportedDateTime}");
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}
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Year = _chineseDateTime.GetYear(dateTime);
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Month = _chineseDateTime.GetMonth(dateTime);
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Day = _chineseDateTime.GetDayOfMonth(dateTime);
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IsLeep = _chineseDateTime.IsLeapMonth(Year, Month);
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_dateTime = dateTime;
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_serialMonth = Month;
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var leepMonth = _chineseDateTime.GetLeapMonth(Year);
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if (leepMonth > 0 && leepMonth <= Month) Month--;
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}
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/// <summary>
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/// 参数为农历的年月日及是否润月
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/// </summary>
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/// <param name="year"></param>
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/// <param name="month"></param>
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/// <param name="day"></param>
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/// <param name="isLeap"></param>
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public ChineseDateTime(int year, int month, int day, bool isLeap = false)
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: this(year, month, day, 0, 0, 0, isLeap)
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{
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}
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public ChineseDateTime(int year, int month, int day, int hour, int minute, int second, bool isLeap = false)
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: this(year, month, day, hour, minute, second, 0, isLeap)
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{
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}
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public ChineseDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, bool isLeap = false)
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{
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_chineseDateTime = new ChineseLunisolarCalendar();
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if (year < _chineseDateTime.MinSupportedDateTime.Year || year >= _chineseDateTime.MaxSupportedDateTime.Year)
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{
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throw new ArgumentOutOfRangeException(
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$"参数年份不在有效的范围内，只支持{_chineseDateTime.MinSupportedDateTime.Year}到{_chineseDateTime.MaxSupportedDateTime.Year - 1}");
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}
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if (month < 1 || month > 12) throw new ArgumentOutOfRangeException($"月份只支持1-12");
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IsLeep = isLeap;
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var leepMonth = _chineseDateTime.GetLeapMonth(year);
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if (leepMonth - 1 != month)
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IsLeep = false;
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_serialMonth = month;
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if (leepMonth > 0 && (month == leepMonth - 1 && isLeap || month > leepMonth - 1))
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_serialMonth = month + 1;
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if (_chineseDateTime.GetDaysInMonth(year, _serialMonth) < day || day < 1)
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throw new ArgumentOutOfRangeException($"指定的月份天数，不在有效的范围内");
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Year = year;
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Month = month;
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Day = day;
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_dateTime = _chineseDateTime.ToDateTime(Year, _serialMonth, Day, hour, minute, second, millisecond);
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}
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public static ChineseDateTime Now => new ChineseDateTime(DateTime.Now);
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#endregion
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#region ====== 年月日润属性 ======
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public int Year { get; }
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public int Month { get; }
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public int Day { get; }
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/// <summary>
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/// 是否为润月
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/// </summary>
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public bool IsLeep { get; }
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#endregion
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#region ====== 输出常规日期 ======
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/// <summary>
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/// 转换为公历
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/// </summary>
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/// <returns></returns>
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public DateTime ToDateTime()
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{
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return _chineseDateTime.ToDateTime(Year, _serialMonth, Day, _dateTime.Hour,
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_dateTime.Minute,
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_dateTime.Second, _dateTime.Millisecond);
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}
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/// <summary>
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/// 短日期（农历）
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/// </summary>
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/// <returns></returns>
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public string ToShortDateString()
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{
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return $"{Year}-{GetLeap(false)}{Month}-{Day}";
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}
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/// <summary>
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/// 长日期（农历）
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/// </summary>
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/// <returns></returns>
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public string ToLongDateString()
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{
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return $"{Year}年{GetLeap()}{Month}月-{Day}日";
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}
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public new string ToString()
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{
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return $"{Year}-{GetLeap(false)}{Month}-{Day} {_dateTime.Hour}:{_dateTime.Minute}:{_dateTime.Second}";
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}
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#endregion
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#region ====== 输出中文日期及星期 ======
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public string ToChineseString()
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{
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return ToChineseString("yMd");
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}
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public string GetChineseDate()
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{
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var date = new StringBuilder();
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date.Append(GetMonth() + "月");
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date.Append(GetDay() + "");
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date.AppendLine();
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date.Append(GetEraYear() + ChineseZodiac + "年");
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date.AppendLine();
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return date.ToString();
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}
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public string ToChineseString(string format)
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{
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var year = GetYear();
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var month = GetMonth();
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var day = GetDay();
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var date = new StringBuilder();
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foreach (var item in format.ToCharArray())
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{
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switch (item)
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{
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case 'y':
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date.Append($"{year}年");
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break;
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case 'M':
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date.Append($"{month}月");
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break;
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case 'd':
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date.Append($"{day}");
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break;
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default:
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date.Append(item);
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break;
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}
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}
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var def = $"{year}年{month}月{day}";
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var result = date.ToString();
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return string.IsNullOrEmpty(result) ? def : result;
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}
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public string ChineseWeek => _chineseWeek[(int)_dateTime.DayOfWeek];
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#endregion
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#region ====== 输出天干地支生肖 ======
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public string ToChineseEraString()
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{
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return ToChineseEraString("yMdHm");
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}
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public string ToChineseEraString(string format)
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{
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var year = GetEraYear();
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var month = GetEraMonth();
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var day = GetEraDay();
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var hour = GetEraHour();
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var minute = GetEraMinute();
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var date = new StringBuilder();
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foreach (var item in format.ToCharArray())
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{
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switch (item)
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{
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case 'y':
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date.Append($"{year}年");
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break;
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case 'M':
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date.Append($"{month}月");
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break;
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case 'd':
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date.Append($"{day}日");
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break;
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case 'H':
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date.Append($"{hour}时");
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break;
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case 'm':
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date.Append($"{minute}刻");
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break;
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default:
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date.Append(item);
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break;
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}
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}
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var def = $"{year}年{month}月{day}日{hour}时";
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var result = date.ToString();
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return result.IsNullOrEmpty() ? def : result;
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}
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public string ChineseZodiac => _chineseZodiac[(Year - 4) % 12];
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#endregion
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#region ====== 辅助方法(Chinese) ======
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private string GetYear()
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{
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var yearArray = Array.ConvertAll(Year.ToString().ToCharArray(), x => int.Parse(x.ToString()));
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var year = new StringBuilder();
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foreach (var item in yearArray)
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year.Append(_chineseNumber[item]);
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return year.ToString();
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}
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private string GetMonth()
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{
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return $"{GetLeap()}{_chineseMonth[Month - 1]}";
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}
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private string GetDay()
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{
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return _chineseDay[Day - 1];
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}
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private string GetLeap(bool isChinese = true)
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{
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return IsLeep ? isChinese ? "润" : "L" : "";
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}
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#endregion
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#region ====== 输助方法（天干地支）======
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//年采用的头尾法，月采用的是节令法，主流日历基本上都这种结合，如百度的日历
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private string GetEraYear()
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{
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var sexagenaryYear = _chineseDateTime.GetSexagenaryYear(_dateTime);
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var stemIndex = _chineseDateTime.GetCelestialStem(sexagenaryYear) - 1;
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var branchIndex = _chineseDateTime.GetTerrestrialBranch(sexagenaryYear) - 1;
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return $"{_celestialStem[stemIndex]}{_terrestrialBranch[branchIndex]}";
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}
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private string GetEraMonth()
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{
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#region ====== 节令法 ======
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var solarIndex = SolarTermFunc((x, y) => x <= y, out var dt);
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solarIndex = solarIndex == -1 ? 23 : solarIndex;
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var currentIndex = (int)Math.Floor(solarIndex / (decimal)2);
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//天干
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var solarMonth = currentIndex == 0 ? 11 : currentIndex - 1; //计算天干序(月份)
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var sexagenaryYear = _chineseDateTime.GetSexagenaryYear(_dateTime);
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var stemYear = _chineseDateTime.GetCelestialStem(sexagenaryYear) - 1;
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if (solarMonth == 0) //立春时，春节前后的不同处理
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{
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var year = _chineseDateTime.GetYear(dt);
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var month = _chineseDateTime.GetMonth(dt);
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stemYear = year == Year && month != 1 ? stemYear + 1 : stemYear;
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}
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if (solarMonth == 11) //立春在春节后，对前一节气春节前后不同处理
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{
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var year = _chineseDateTime.GetYear(dt);
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stemYear = year != Year ? stemYear - 1 : stemYear;
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}
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int stemIndex;
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switch (stemYear)
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{
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case 0:
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case 5:
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stemIndex = 3;
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break;
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case 1:
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case 6:
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stemIndex = 5;
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break;
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case 2:
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case 7:
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stemIndex = 7;
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break;
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case 3:
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case 8:
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stemIndex = 9;
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break;
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default:
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stemIndex = 1;
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break;
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}
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//天干序
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stemIndex = (stemIndex - 1 + solarMonth) % 10;
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//地支序
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var branchIndex = currentIndex >= 11 ? currentIndex - 11 : currentIndex + 1;
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return $"{_celestialStem[stemIndex]}{_terrestrialBranch[branchIndex]}";
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#endregion
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#region ====== 头尾法 ======
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//这里算法要容易些，原理和节令法一样，只需取农历整年整月即可。未贴上来
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#endregion
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}
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private string GetEraDay()
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{
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var ts = _dateTime - new DateTime(1901, 2, 15);
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var offset = ts.Days;
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var sexagenaryDay = offset % 60;
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return $"{_celestialStem[sexagenaryDay % 10]}{_terrestrialBranch[sexagenaryDay % 12]}";
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}
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private string GetEraHour()
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{
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var hourIndex = (int)Math.Floor((_dateTime.Hour + 1) / (decimal)2);
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hourIndex = hourIndex == 12 ? 0 : hourIndex;
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return _terrestrialBranch[hourIndex];
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}
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private string GetEraMinute()
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{
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var realMinute = (_dateTime.Hour % 2 == 0 ? 60 : 0) + _dateTime.Minute;
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return $"{_chineseNumber[(int)Math.Floor(realMinute / (decimal)30) + 1]}";
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}
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#endregion
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#region ====== 24节气 ======
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/// <summary>
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/// 当前节气，没有则返回空
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/// </summary>
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public string SolarTerm
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{
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get
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{
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var i = SolarTermFunc((x, y) => x == y, out var dt);
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return i == -1 ? "" : _solarTerm[i];
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}
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}
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/// <summary>
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/// 上一个节气
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/// </summary>
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public string SolarTermPrev
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{
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get
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{
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var i = SolarTermFunc((x, y) => x < y, out var dt);
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return i == -1 ? "" : _solarTerm[i];
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}
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}
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/// <summary>
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/// 下一个节气
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/// </summary>
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public string SolarTermNext
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{
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get
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{
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var i = SolarTermFunc((x, y) => x > y, out var dt);
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return i == -1 ? "" : $"{_solarTerm[i]}";
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}
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}
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/// <summary>
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/// 节气计算（当前年），返回指定条件的节气序及日期（公历）
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/// </summary>
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/// <param name="func"></param>
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/// <param name="dateTime"></param>
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/// <returns>-1时即没找到</returns>
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private int SolarTermFunc(Expression<Func<int, int, bool>> func, out DateTime dateTime)
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{
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var baseDateAndTime = new DateTime(1900, 1, 6, 2, 5, 0); //#1/6/1900 2:05:00 AM#
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var year = _dateTime.Year;
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int[] solar = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 };
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var expressionType = func.Body.NodeType;
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if (expressionType != ExpressionType.LessThan && expressionType != ExpressionType.LessThanOrEqual &&
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expressionType != ExpressionType.GreaterThan && expressionType != ExpressionType.GreaterThanOrEqual &&
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expressionType != ExpressionType.Equal)
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{
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throw new NotSupportedException("不受支持的操作符");
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}
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if (expressionType == ExpressionType.LessThan || expressionType == ExpressionType.LessThanOrEqual)
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{
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solar = solar.OrderByDescending(x => x).ToArray();
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}
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foreach (var item in solar)
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{
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var num = 525948.76 * (year - 1900) + _solarTermInfo[item - 1];
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var newDate = baseDateAndTime.AddMinutes(num); //按分钟计算
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if (func.Compile()(newDate.DayOfYear, _dateTime.DayOfYear))
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{
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dateTime = newDate;
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return item - 1;
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}
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}
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dateTime = _chineseDateTime.MinSupportedDateTime;
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return -1;
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}
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#endregion
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}
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}
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