复制代码 代码如下:
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;

namespace LogisTrac
{
/// <summary>
/// 日志类
/// 队列 可年/月/周/日/大小分割
/// 调用方法：
/// Log.Instance.LogDirectory=@"C:\"; 默认为程序运行目录
/// Log.Instance.FileNamePrefix="cxd";默认为log_
/// Log.Instance.CurrentMsgType = MsgLevel.Debug;默认为Error
/// Log.Instance.logFileSplit = LogFileSplit.Daily; 日志拆分类型LogFileSplit.Sizely 大小
/// Log.Instance.MaxFileSize = 5; 默认大小为2M，只有LogFileSplit.Sizely的时候配置有效
/// Log.Instance.LogWrite("aa");
/// Log.Instance.LogWrite("aa", MsgLevel.Debug);
/// </summary>
public class Log : IDisposable
{
private static Log _instance = null;
private static readonly object _synObject = new object();

/// <summary>
///单例
/// </summary>
public static Log Instance
{
get
{
if (null == _instance)
{
lock (_synObject)
{
if (null == _instance)
{
_instance = new Log();
}
}
}
return _instance;
}
}

/// <summary>
/// 日志对象的缓存队列
/// </summary>
private static Queue<Msg> _msgs;

/// <summary>
/// 日志写入线程的控制标记 ture写中|false没有写
/// </summary>
private bool _state;

private string _logDirectory = AppDomain.CurrentDomain.BaseDirectory;

/// <summary>
/// 日志文件存放目录
/// </summary>
public string LogDirectory
{
get { return _logDirectory; }
set { _logDirectory = value; }
}

private LogFileSplit _logFileSplit = LogFileSplit.Sizely;
/// <summary>
/// 日志拆分类型
/// </summary>
public LogFileSplit logFileSplit
{
get { return _logFileSplit; }
set { _logFileSplit = value; }
}

private MsgLevel _currentLogLevel = MsgLevel.Error;

/// <summary>
/// 当前日志记录等级
/// </summary>
public MsgLevel CurrentMsgType
{
get { return _currentLogLevel; }
set { _currentLogLevel = value; }
}

/// <summary>
/// 当前负责记录日志文件的名称
/// </summary>
private string _currentFileName="1.log";

private string _fileNamePrefix = "log_";

/// <summary>
/// 日志的前缀名称，默认为log_
/// </summary>
public string FileNamePrefix
{
get { return _fileNamePrefix; }
set { _fileNamePrefix = value; }
}

/// <summary>
/// 日志文件生命周期的时间标记
/// </summary>
private DateTime _CurrentFileTimeSign = new DateTime();

private int _maxFileSize = 2;

/// <summary>
/// 单个日志文件默认大小(单位：兆)
/// </summary>
public int MaxFileSize
{
get { return _maxFileSize; }
set { _maxFileSize = value; }
}

/// <summary>
/// 文件后缀号
/// </summary>
private int _fileSymbol = 0;

/// <summary>
/// 当前文件大小(单位：B)
/// </summary>
private long _fileSize = 0;

/// <summary>
/// 日志文件写入流对象
/// </summary>
private StreamWriter _writer;

/// <summary>
/// 创建日志对象的新实例,根据指定的日志文件路径和指定的日志文件创建类型
/// </summary>
private Log()
{
if (_msgs == null)
{
GetCurrentFilename();
_state = true;
_msgs = new Queue<Msg>();
Thread thread = new Thread(work);
thread.Start();
}
}

//日志文件写入线程执行的方法
private void work()
{
while (true)
{
//判断队列中是否存在待写入的日志
if (_msgs.Count > 0)
{
Msg msg = null;
lock (_msgs)
{
msg = _msgs.Dequeue();

if (msg != null)
{
FileWrite(msg);
}
}
}
else
{
//判断是否已经发出终止日志并关闭的消息
if (_state)
{
Thread.Sleep(1);
}
else
{
FileClose();
}
}
}
}

/// <summary>
/// 根据日志类型获取日志文件名,并同时创建文件到期的时间标记
/// 通过判断文件的到期时间标记将决定是否创建新文件。
/// </summary>
/// <returns></returns>
private
void GetCurrentFilename()
{
DateTime now = DateTime.Now;
string format = "";
switch (_logFileSplit)
{
case LogFileSplit.Daily:
_CurrentFileTimeSign = new DateTime(now.Year, now.Month, now.Day);
_CurrentFileTimeSign = _CurrentFileTimeSign.AddDays(1);
format = now.ToString("yyyyMMdd'.log'");
break;
case LogFileSplit.Weekly:
_CurrentFileTimeSign = new DateTime(now.Year, now.Month, now.Day);
_CurrentFileTimeSign = _CurrentFileTimeSign.AddDays(7);
format = now.ToString("yyyyMMdd'.log'");
break;
case LogFileSplit.Monthly:
_CurrentFileTimeSign = new DateTime(now.Year, now.Month, 1);
_CurrentFileTimeSign = _CurrentFileTimeSign.AddMonths(1);
format = now.ToString("yyyyMM'.log'");
break;
case LogFileSplit.Annually:
_CurrentFileTimeSign = new DateTime(now.Year, 1, 1);
_CurrentFileTimeSign = _CurrentFileTimeSign.AddYears(1);
format = now.ToString("yyyy'.log'");
break;
default:
_fileSymbol++;
format = _fileSymbol.ToString() + ".log";
break;
}
if (File.Exists(Path.Combine(LogDirectory, _currentFileName)))
{
_fileSize = new FileInfo(Path.Combine(LogDirectory, _currentFileName)).Length;
}
else
{
_fileSize = 0;
}
_currentFileName=_fileNamePrefix + format.Trim();
}

//写入日志文本到文件的方法
private void FileWrite(Msg msg)
{
try
{
if (_writer == null)
{
FileOpen();

}

if (_writer != null)
{
//判断文件到期标志,如果当前文件到期则关闭当前文件创建新的日志文件
if ((_logFileSplit != LogFileSplit.Sizely && DateTime.Now >= _CurrentFileTimeSign)||
(_logFileSplit == LogFileSplit.Sizely && ((double)_fileSize / 1048576) > _maxFileSize))
{
GetCurrentFilename();
FileClose();
FileOpen();
}
_writer.Write(msg.datetime);
_writer.Write('\t');
_writer.Write(msg.type);
_writer.Write('\t');
_writer.WriteLine(msg.text);
_fileSize+=System.Text.Encoding.UTF8.GetBytes(msg.ToString()).Length;
_writer.Flush();
}
}
catch (Exception e)
{
Console.Out.Write(e);
}
}

//打开文件准备写入
private void FileOpen()
{
_writer = new StreamWriter(LogDirectory + _currentFileName, true, Encoding.UTF8);
}

//关闭打开的日志文件
private void FileClose()
{
if (_writer != null)
{
_writer.Flush();
_writer.Close();
_writer.Dispose();
_writer = null;
}
}

/// <summary>
/// 写入新日志,根据指定的日志对象Msg
/// </summary>
/// <param name="msg">日志内容对象</param>
private void LogWrite(Msg msg)
{
if (msg.type < CurrentMsgType)
return;
if (_msgs != null)
{
lock (_msgs)
{
_msgs.Enqueue(msg);
}
}
}

/// <summary>
/// 写入新日志,根据指定的日志内容和信息类型,采用当前时间为日志时间写入新日志
/// </summary>
/// <param name="text">日志内容</param>
/// <param name="type">信息类型</param>
public void LogWrite(string text, MsgLevel type)
{
LogWrite(new Msg(text, type));
}

/// <summary>
/// 写入新日志,根据指定的日志内容
/// </summary>
/// <param name="text">日志内容</param>
public void LogWrite(string text)
{
LogWrite(text, MsgLevel.Debug);
}

/// <summary>
/// 写入新日志,根据指定的日志时间、日志内容和信息类型写入新日志
/// </summary>
/// <param name="dt">日志时间</param>
/// <param name="text">日志内容</param>
/// <param name="type">信息类型</param>
public void LogWrite(DateTime dt, string text, MsgLevel type)
{
LogWrite(new Msg(dt, text, type));
}

/// <summary>
/// 写入新日志,根据指定的异常类和信息类型写入新日志
/// </summary>
/// <param name="e">异常对象</param>
/// <param name="type">信息类型</param>
public void LogWrite(Exception e)
{
LogWrite(new Msg(e.Message, MsgLevel.Error));
}

/// <summary>
/// 销毁日志对象
/// </summary>
public void Dispose()
{
_state = false;
}
}

/// <summary>
/// 一个日志记录的对象
/// </summary>
public class Msg
{

/// <summary>
/// 创建新的日志记录实例;日志记录的内容为空,消息类型为MsgType.Unknown,日志时间为当前时间
/// </summary>
public Msg()
: this("", MsgLevel.Debug)
{
}

/// <summary>
/// 创建新的日志记录实例;日志事件为当前时间
/// </summary>
/// <param name="t">日志记录的文本内容</param>
/// <param name="p">日志记录的消息类型</param>
public Msg(string t, MsgLevel p)
: this(DateTime.Now, t, p)
{
}

/// <summary>
/// 创建新的日志记录实例;
/// </summary>
/// <param name="dt">日志记录的时间</param>
/// <param name="t">日志记录的文本内容</param>
/// <param name="p">日志记录的消息类型</param>
public Msg(DateTime dt, string t, MsgLevel p)
{
datetime = dt;
type = p;
text = t;
}

/// <summary>
/// 日志记录的时间
/// </summary>
public DateTime datetime { get; set; }

/// <summary>
///日志记录的内容
/// </summary>
public string text { get; set; }

/// <summary>
/// 日志等级
/// </summary>
public MsgLevel type { get; set; }

public new string ToString()
{
return datetime.ToString(CultureInfo.InvariantCulture) + "\t" + text + "\n";
}
}

/// <summary>
/// 日志文件拆分的枚举
/// </summary>
/// <remarks>日志类型枚举指示日志文件创建的方式,如果日志比较多可考虑每天创建一个日志文件
/// 如果日志量比较小可考虑每周、每月或每年创建一个日志文件</remarks>
public enum LogFileSplit
{
/// <summary>
/// 此枚举指示每天创建一个新的日志文件
/// </summary>
Daily,

/// <summary>
/// 此枚举指示每周创建一个新的日志文件
/// </summary>
Weekly,

/// <summary>
/// 此枚举指示每月创建一个新的日志文件
/// </summary>
Monthly,

/// <summary>
/// 此枚举指示每年创建一个新的日志文件
/// </summary>
Annually,

/// <summary>
/// 日志文件大小超过指定的创建一个新的日志文件，MaxFileSize指定大小
/// </summary>
Sizely
}

/// <summary>
/// 日志等级类型 Debug=0 Infor Warn Error
/// </summary>
public enum MsgLevel
{
/// <summary>
/// 调试信息
/// </summary>
Debug = 0,

/// <summary>
/// 指示普通信息类型的日志记录
/// </summary>
Infor,

/// <summary>
/// 指示警告信息类型的日志记录
/// </summary>
Warn,

/// <summary>
/// 指示错误信息类型的日志记录
/// </summary>
Error
}

}