用 Log4Net 三步实现 .Net Core 类库 分日志等级（不同文件目录）存日志

 ?1 using log4net; ?2 using log4net.Config; ?3 using System; ?4 using System.IO; ?5 ??6 namespace Chf.Log ?7 { ?8 ????/// <summary> ?9 ????/// Log4Net Helper 2018-12-16 19:15:00 ??10 ????/// 日志等级：OFF > FATAL > ERROR > WARN > INFO > DEBUG > ALL 11 ????/// </summary> 12 ????public sealed class LogHelper 13 ????{ ?14 ????????private static ILog logger; 15 ?16 ????????static LogHelper() 17 ????????{ 18 ????????????if (logger == null) 19 ????????????{ 20 ????????????????var repository = LogManager.CreateRepository("Chf.Web"); 21 ????????????????//指定配置文件 22 ????????????????XmlConfigurator.Configure(repository, new FileInfo("Config//log4netTwo.config")); 23 ????????????????logger = LogManager.GetLogger(repository.Name, "RollingLogFileAppender"); 24 ????????????} 25 ????????} 26 ?27 ????????/// <summary> 28 ????????/// 调试信息 29 ????????/// </summary> 30 ????????/// <param name="message"></param> 31 ????????/// <param name="exception"></param> 32 ????????public static void Debug(string message, Exception exception = null) 33 ????????{ 34 ????????????if (logger.IsDebugEnabled) 35 ????????????{ 36 ????????????????if (exception == null) 37 ????????????????????logger.Debug(message); 38 ????????????????else 39 ????????????????????logger.Debug(FormartLog(message, exception)); 40 ????????????} 41 ????????} 42 ?43 ????????/// <summary> 44 ????????/// 一般信息 45 ????????/// </summary> 46 ????????/// <param name="message"></param> 47 ????????/// <param name="exception"></param> 48 ????????public static void Info(string message, Exception exception = null) 49 ????????{ 50 ????????????if (logger.IsInfoEnabled) 51 ????????????{ ?52 ????????????????if (exception == null) 53 ????????????????????logger.Info(message); 54 ????????????????else 55 ????????????????????logger.Info(FormartLog(message, exception)); 56 ????????????} 57 ????????} 58 ?59 ????????/// <summary> 60 ????????/// 警告 61 ????????/// </summary> 62 ????????/// <param name="message"></param> 63 ????????/// <param name="exception"></param> 64 ????????public static void Warn(string message, Exception exception = null) 65 ????????{ ?66 ????????????if (logger.IsWarnEnabled) 67 ????????????{ 68 ????????????????if (exception == null) 69 ????????????????????logger.Warn(message); 70 ????????????????else 71 ????????????????????logger.Warn(FormartLog(message, exception)); 72 ????????????} 73 ????????} 74 ?75 ????????/// <summary> 76 ????????/// 一般错误 77 ????????/// </summary> 78 ????????/// <param name="message"></param> 79 ????????/// <param name="exception"></param> 80 ????????public static void Error(string message, Exception exception = null) 81 ????????{ 82 ????????????if (logger.IsErrorEnabled) 83 ????????????{ 84 ????????????????if (exception == null) 85 ????????????????????logger.Error(message); 86 ????????????????else 87 ????????????????????logger.Error(FormartLog(message, exception)); 88 ????????????} 89 ????????} 90 ?91 ????????/// <summary> 92 ????????/// 致命错误 93 ????????/// </summary> 94 ????????/// <param name="message"></param> 95 ????????/// <param name="exception"></param> 96 ????????public static void Fatal(string message, Exception exception = null) 97 ????????{ 98 ????????????if (logger.IsFatalEnabled) 99 ????????????{100 ????????????????if (exception == null)101 ????????????????????logger.Fatal(message);102 ????????????????else103 ????????????????????logger.Fatal(FormartLog(message, exception)); 104 ????????????}105 ????????}106 107 108 ????????/// <summary>109 ????????/// 自定义返回格式110 ????????/// </summary>111 ????????/// <param name="throwMsg"></param>112 ????????/// <param name="ex"></param>113 ????????/// <returns></returns>114 ????????private static string FormartLog(string throwMsg, Exception ex)115 ????????{116 ????????????return string.Format("【自定义内容】：{0} \r\n【异常类型】：{1} \r\n【异常信息】：{2} \r\n【堆栈调用】：{3}", new object[] { throwMsg, ex.GetType().Name, ex.Message, ex.StackTrace });117 ????????}118 ????}119 }

 ?1 <?xml version="1.0" encoding="utf-8"?> ?2 <configuration> ?3 ??<configSections> ?4 ????<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/> ?5 ??</configSections> ?6 ??7 ??<log4net> ?8 ????<!-- Debug 将日志以回滚文件的形式写到文件中 --> ?9 ????<appender name="RollingFileDebug" type="log4net.Appender.RollingFileAppender"> 10 ??????<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 --> 11 ??????<file value="Log\\Debug\\" /> 12 ??????<!-- 将日志信息追加到已有的日志文件中--> 13 ??????<appendToFile value="true" /> 14 ??????<param name="MaxFileSize" value="10240"/> 15 ??????<param name="MaxSizeRollBackups" value="100"/> 16 ??????<!-- 最小锁定模式，以允许多个进程可以写入同一个文件 --> 17 ??????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> 18 ??????<!-- 指定按日期切分日志文件 --> 19 ??????<rollingStyle value="Date" /> 20 ??????<!-- 日志文件的命名规则 --> 21 ??????<datePattern value="yyyy-MM-dd_HH_mm_ss&quot;.log&quot;" /> 22 ??????<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false --> 23 ??????<staticLogFileName value="false" /> 24 ??????<layout type="log4net.Layout.PatternLayout"> 25 ????????<conversionPattern value="【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" /> 26 ??????</layout> 27 ??????<filter type="log4net.Filter.LevelRangeFilter"> 28 ????????<param name="LevelMin" value="Debug" /> 29 ????????<param name="LevelMax" value="Debug" /> 30 ??????</filter> 31 ????</appender> 32 ?33 ????<!-- Info 将日志以回滚文件的形式写到文件中 --> 34 ????<appender name="RollingFileInfo" type="log4net.Appender.RollingFileAppender"> 35 ??????<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 --> 36 ??????<file value="Log\\Info\\" /> 37 ??????<!-- 将日志信息追加到已有的日志文件中--> 38 ??????<appendToFile value="true" /> 39 ??????<param name="MaxFileSize" value="10240"/> 40 ??????<param name="MaxSizeRollBackups" value="100"/> 41 ??????<!-- 最小锁定模式，以允许多个进程可以写入同一个文件 --> 42 ??????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> 43 ??????<!-- 指定按日期切分日志文件 --> 44 ??????<rollingStyle value="Date" /> 45 ??????<!-- 日志文件的命名规则 --> 46 ??????<datePattern value="yyyy-MM-dd_HH_mm_ss&quot;.log&quot;" /> 47 ??????<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false --> 48 ??????<staticLogFileName value="false" /> 49 ??????<layout type="log4net.Layout.PatternLayout"> 50 ????????<conversionPattern value="【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" /> 51 ??????</layout> 52 ??????<filter type="log4net.Filter.LevelRangeFilter"> 53 ????????<param name="LevelMin" value="Info" /> 54 ????????<param name="LevelMax" value="Info" /> 55 ??????</filter> 56 ????</appender> 57 ?58 ????<!-- Warn 将日志以回滚文件的形式写到文件中 --> 59 ????<appender name="RollingFileWarn" type="log4net.Appender.RollingFileAppender"> 60 ??????<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 --> 61 ??????<file value="Log\\Warn\\" /> 62 ??????<!-- 将日志信息追加到已有的日志文件中--> 63 ??????<appendToFile value="true" /> 64 ??????<param name="MaxFileSize" value="10240"/> 65 ??????<param name="MaxSizeRollBackups" value="100"/> 66 ??????<!-- 最小锁定模式，以允许多个进程可以写入同一个文件 --> 67 ??????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> 68 ??????<!-- 指定按日期切分日志文件 --> 69 ??????<rollingStyle value="Date" /> 70 ??????<!-- 日志文件的命名规则 --> 71 ??????<datePattern value="yyyy-MM-dd_HH_mm_ss&quot;.log&quot;" /> 72 ??????<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false --> 73 ??????<staticLogFileName value="false" /> 74 ??????<layout type="log4net.Layout.PatternLayout"> 75 ????????<conversionPattern value="【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" /> 76 ??????</layout> 77 ??????<filter type="log4net.Filter.LevelRangeFilter"> 78 ????????<param name="LevelMin" value="Warn" /> 79 ????????<param name="LevelMax" value="Warn" /> 80 ??????</filter> 81 ????</appender> 82 ?83 ????<!-- Error 将日志以回滚文件的形式写到文件中 --> 84 ????<appender name="RollingFileError" type="log4net.Appender.RollingFileAppender"> 85 ??????<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 --> 86 ??????<file value="Log\\Error\\" /> 87 ??????<!-- 将日志信息追加到已有的日志文件中--> 88 ??????<appendToFile value="true" /> 89 ??????<param name="MaxFileSize" value="10240"/> 90 ??????<param name="MaxSizeRollBackups" value="100"/> 91 ??????<!-- 最小锁定模式，以允许多个进程可以写入同一个文件 --> 92 ??????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> 93 ??????<!-- 指定按日期切分日志文件 --> 94 ??????<rollingStyle value="Date" /> 95 ??????<!-- 日志文件的命名规则 --> 96 ??????<datePattern value="yyyy-MM-dd_HH_mm_ss&quot;.log&quot;" /> 97 ??????<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false --> 98 ??????<staticLogFileName value="false" /> 99 ??????<layout type="log4net.Layout.PatternLayout">100 ????????<conversionPattern value="【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />101 ??????</layout>102 ??????<filter type="log4net.Filter.LevelRangeFilter">103 ????????<param name="LevelMin" value="Error" />104 ????????<param name="LevelMax" value="Error" />105 ??????</filter>106 ????</appender>107 108 ????<!-- Fatal 将日志以回滚文件的形式写到文件中 -->109 ????<appender name="RollingFileFatal" type="log4net.Appender.RollingFileAppender">110 ??????<!-- 日志文件存放位置，可以为绝对路径也可以为相对路径 -->111 ??????<file value="Log\\Fatal\\" />112 ??????<!-- 将日志信息追加到已有的日志文件中-->113 ??????<appendToFile value="true" />114 ??????<param name="MaxFileSize" value="10240"/>115 ??????<param name="MaxSizeRollBackups" value="100"/>116 ??????<!-- 最小锁定模式，以允许多个进程可以写入同一个文件 -->117 ??????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />118 ??????<!-- 指定按日期切分日志文件 -->119 ??????<rollingStyle value="Date" />120 ??????<!-- 日志文件的命名规则 -->121 ??????<datePattern value="yyyy-MM-dd_HH_mm_ss&quot;.log&quot;" />122 ??????<!-- 当将日期作为日志文件的名字时，必须将staticLogFileName的值设置为false -->123 ??????<staticLogFileName value="false" />124 ??????<layout type="log4net.Layout.PatternLayout">125 ????????<conversionPattern value="【异常时间】：%date【线程ID】：%thread%newline【异常级别】：%5level%newline%message%newline--------------------------------------------------------------------%newline" />126 ??????</layout>127 ??????<filter type="log4net.Filter.LevelRangeFilter">128 ????????<param name="LevelMin" value="Fatal" />129 ????????<param name="LevelMax" value="Fatal" />130 ??????</filter>131 ????</appender>132 133 ????<logger name="RollingLogFileAppender">134 ??????<level value="ALL" />135 ??????<appender-ref ref="RollingFileDebug" />136 ??????<appender-ref ref="RollingFileInfo" />137 ??????<appender-ref ref="RollingFileWarn" />138 ??????<appender-ref ref="RollingFileError" />139 ??????<appender-ref ref="RollingFileFatal" />140 ????</logger>141 142 ????<!--<root> 143 ????控制级别，由低到高：ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF ??144 ????比如定义级别为INFO，则INFO级别向下的级别，比如DEBUG日志将不会被记录 ?145 ?????如果没有定义LEVEL的值，则缺省为DEBUG ?146 ??????<level value="ALL" /> 147 ???????按日期切分日志文件，并将日期作为日志文件的名字 ?148 ??????<appender-ref ref="RollingFileAppenderNameByDate" />149 ????</root>-->150 ??</log4net>151 </configuration>