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286 lines
10 KiB
286 lines
10 KiB
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Apewer
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{
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/// <summary>System.DateTime 实用工具。</summary>
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public class DateTimeUtility
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{
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#region Private Methods
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private static DateTime GetOrigin()
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{
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return new DateTime(1970, 1, 1, 0, 0, 0, 0);
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}
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private static string FormatDate(DateTime datetime, bool lucid)
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{
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var sb = new StringBuilder();
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var y = NumberUtility.RestrictValue(datetime.Year, 0, 9999);
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var m = NumberUtility.RestrictValue(datetime.Month, 1, 12);
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var d = NumberUtility.RestrictValue(datetime.Day, 1, GetDays(y, m));
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if (y < 10) sb.Append("000");
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else if (y < 100) sb.Append("00");
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else if (y < 1000) sb.Append("0");
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sb.Append(y.ToString());
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if (lucid) sb.Append("-");
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if (m < 10) sb.Append("0");
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sb.Append(m.ToString());
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if (lucid) sb.Append("-");
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if (d < 10) sb.Append("0");
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sb.Append(d.ToString());
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var date = sb.ToString();
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return date;
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}
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private static string FormatTime(DateTime datetime, bool lucid, bool seconds, bool milliseconds)
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{
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var sb = new StringBuilder();
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var h = NumberUtility.RestrictValue(datetime.Hour, 0, 23);
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var m = NumberUtility.RestrictValue(datetime.Minute, 0, 59);
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var s = NumberUtility.RestrictValue(datetime.Second, 0, 59);
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var ms = NumberUtility.RestrictValue(datetime.Millisecond, 0, 999);
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if (h < 10) sb.Append("0");
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sb.Append(h.ToString());
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if (lucid) sb.Append(":");
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if (m < 10) sb.Append("0");
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sb.Append(m.ToString());
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if (seconds)
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{
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if (lucid) sb.Append(":");
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if (s < 10) sb.Append("0");
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sb.Append(s.ToString());
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if (milliseconds)
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{
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if (lucid) sb.Append(".");
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if (ms < 10) sb.Append("00");
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else if (ms < 100) sb.Append("0");
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sb.Append(ms.ToString());
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}
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}
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var time = sb.ToString();
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return time;
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}
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#endregion
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#region Public Properties
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/// <summary>获取当前本地时间的易读格式文本。</summary>
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public static string NowLucid { get { return ToLucid(DateTime.Now); } }
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/// <summary>获取当前 UTC 的易读格式文本。</summary>
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public static string NowUtcLucid { get { return ToLucid(DateTime.UtcNow); } }
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/// <summary>获取当前本地时间的毫秒时间戳。</summary>
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public static long NowStamp { get { return GetStamp(DateTime.Now); } }
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/// <summary>获取当前 UTC 的毫秒时间戳。</summary>
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public static long NowUtcStamp { get { return GetStamp(DateTime.UtcNow); } }
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/// <summary>获取 1970-01-01 00:00:00.000 的时间对象。</summary>
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public static DateTime Origin { get { return GetOrigin(); } }
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#endregion
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#region Public Methods
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/// <summary>获取安全的 DateTime 对象。</summary>
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public static DateTime GetDateTime(DateTime datetime)
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{
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var origin = GetOrigin();
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var span = datetime - origin;
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var stemp = span.TotalMilliseconds;
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var safely = origin.AddMilliseconds(stemp);
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return safely;
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}
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/// <summary>获取安全的 DateTime 对象。</summary>
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public static DateTime ToDateTime(DateTime datetime)
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{
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return GetDateTime(datetime);
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}
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/// <summary>从毫秒时间戳获取 DateTime 对象。发生异常且不允许异常时将返回 1970-01-01 00:00:00.000。</summary>
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/// <exception cref="System.ArgumentOutOfRangeException"></exception>
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public static DateTime GetDateTime(long stamp, bool exceptable = true)
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{
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var origin = GetOrigin();
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try
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{
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var datetime = origin.AddMilliseconds(Convert.ToDouble(stamp));
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return datetime;
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}
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catch
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{
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if (exceptable) throw new ArgumentOutOfRangeException();
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return origin;
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}
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}
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/// <summary>从毫秒时间戳获取 DateTime 对象。发生异常且不允许异常时将返回 1970-01-01 00:00:00.000。</summary>
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/// <exception cref="System.ArgumentOutOfRangeException"></exception>
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public static DateTime ToDateTime(long stamp, bool exceptable = true)
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{
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var origin = GetOrigin();
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try
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{
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var datetime = origin.AddMilliseconds(Convert.ToDouble(stamp));
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return datetime;
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}
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catch
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{
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if (exceptable) throw new ArgumentOutOfRangeException();
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return origin;
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}
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}
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/// <summary>获取毫秒时间戳。</summary>
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public static long GetStamp(DateTime datetime)
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{
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var origin = GetOrigin();
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var span = datetime - origin;
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var milliseconds = span.TotalMilliseconds;
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var result = Convert.ToInt64(milliseconds);
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return result;
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}
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/// <summary>获取毫秒时间戳。</summary>
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public static long ToStamp(DateTime datetime)
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{
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return GetStamp(datetime);
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}
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/// <summary>判断是否为闰年。</summary>
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public static bool IsLeapYear(int year)
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{
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if (year % 400 == 0) return true;
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if (year % 100 == 0) return false;
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if (year % 4 == 0) return true;
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return false;
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}
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/// <summary>获取指定月份中的天数。</summary>
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public static int GetDays(int year, int month)
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{
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switch (month)
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{
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case 1: case 3: case 5: case 7: case 8: case 10: case 12: return 31;
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case 4: case 6: case 9: case 11: return 30;
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case 2: return IsLeapYear(year) ? 29 : 28;
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default: return 0;
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}
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}
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/// <summary>转换 DateTime 对象到易于阅读的文本。</summary>
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public static string ToLucid(DateTime datetime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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var safely = GetDateTime(datetime);
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var sb = new StringBuilder();
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if (date) sb.Append(FormatDate(safely, true));
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if (time)
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{
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if (date) sb.Append(" ");
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sb.Append(FormatTime(safely, true, seconds, milliseconds));
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}
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var lucid = sb.ToString();
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return lucid;
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}
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/// <summary>转换 DateTime 对象到易于阅读的文本。</summary>
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public static string GetLucid(DateTime datetime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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return GetLucid(datetime, date, time, seconds, milliseconds);
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}
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/// <summary>转换 DateTime 对象到紧凑的文本。</summary>
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public static string ToCompact(DateTime datetime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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var safely = GetDateTime(datetime);
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var sb = new StringBuilder();
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if (date) sb.Append(FormatDate(safely, false));
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if (time)
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{
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// if (date) sb.Append(" ");
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sb.Append(FormatTime(safely, false, seconds, milliseconds));
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}
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var lucid = sb.ToString();
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return lucid;
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}
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/// <summary>转换 DateTime 对象到紧凑的文本。</summary>
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public static string GetCompact(DateTime datetime, bool date = true, bool time = true, bool seconds = true, bool milliseconds = true)
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{
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return ToCompact(datetime, date, time, seconds, milliseconds);
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}
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/// <summary>解析 Lucid 文本。</summary>
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public static Nullable<DateTime> ParseLucid(string lucid)
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{
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var failed = new Nullable<DateTime>();
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if (lucid.IsEmpty()) return failed;
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int year = 0, month = 0, day = 0, hour = 0, minute = 0, second = 0, milli = 0;
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if (lucid.Length < 10) return failed;
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if (lucid[4] != '-' || lucid[7] != '-') return failed;
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year = TextUtility.GetInt32(lucid.Substring(0, 4));
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month = TextUtility.GetInt32(lucid.Substring(5, 2));
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day = TextUtility.GetInt32(lucid.Substring(8, 2));
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if (year < 1) return failed;
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if (month < 1 || month > 12) return failed;
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if (day < 1 || day > DateTime.DaysInMonth(year, month)) return failed;
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if (lucid.Length >= 16)
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{
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if (lucid[10] != ' ' || lucid[13] != ':') return failed;
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hour = TextUtility.GetInt32(lucid.Substring(11, 2));
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minute = TextUtility.GetInt32(lucid.Substring(14, 2));
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if (hour < 0 || hour > 23) return failed;
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if (minute < 0 || minute > 59) return failed;
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if (lucid.Length >= 19)
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{
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if (lucid[16] != ':') return failed;
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second = TextUtility.GetInt32(lucid.Substring(17, 2));
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if (second < 0 || second > 59) return failed;
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if (lucid.Length >= 23)
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{
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if (lucid[19] != '.') return failed;
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milli = TextUtility.GetInt32(lucid.Substring(20, 3));
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if (milli < 0 || milli > 999) return failed;
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}
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}
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}
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var entity = new DateTime(year, month, day, hour, minute, second, milli);
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return new Nullable<DateTime>(entity);
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}
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/// <summary>创建新的零值 DateTime 对象。</summary>
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public static DateTime Zero() => new DateTime(0L, DateTimeKind.Utc);
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#endregion
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}
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}
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