前言：
今天姐妹们对“log4net不使用配置”大概比较着重，兄弟们都想要学习一些“log4net不使用配置”的相关内容。那么小编也在网络上收集了一些有关“log4net不使用配置””的相关知识，希望各位老铁们能喜欢，兄弟们快快来学习一下吧！在Web.Core.API下新建 Log4Net 文件夹内，新建 ILoggerHelper.cs
/// <summary> /// 日志接口 /// </summary> public interface ILoggerHelper { /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Debug(object source, string message); /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="ps">ps</param> void Debug(object source, string message, params object[] ps); /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Debug(Type source, string message); /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Info(object source, object message); /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Info(Type source, object message); /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Warn(object source, object message); /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Warn(Type source, object message); /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Error(object source, object message); /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Error(Type source, object message); /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Fatal(object source, object message); /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> void Fatal(Type source, object message); /* Log a message object and exception */ /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Debug(object source, object message, Exception exception); /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Debug(Type source, object message, Exception exception); /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Info(object source, object message, Exception exception); /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Info(Type source, object message, Exception exception); /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Warn(object source, object message, Exception exception); /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Warn(Type source, object message, Exception exception); /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Error(object source, object message, Exception exception); /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Error(Type source, object message, Exception exception); /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Fatal(object source, object message, Exception exception); /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> void Fatal(Type source, object message, Exception exception); }nuget引入log4net在 Log4Net 文件夹下新建 LogHelper.cs/// <summary> /// 日志帮助实现类 /// </summary> public class LogHelper : ILoggerHelper { private readonly ConcurrentDictionary<Type, ILog> Loggers = new ConcurrentDictionary<Type, ILog>(); private static ILog logger; public LogHelper() { if (logger == null) { var repository = LogManager.CreateRepository("NETCoreRepository"); //log4net從log4net.config文件中讀取配置信息 XmlConfigurator.Configure(repository, new FileInfo("log4net.config")); logger = LogManager.GetLogger(repository.Name, "Logger"); } } /// <summary> /// 获取记录器 /// </summary> /// <param name="source">soruce</param> /// <returns></returns> private ILog GetLogger(Type source) { if (Loggers.ContainsKey(source)) { return Loggers[source]; } else { Loggers.TryAdd(source, logger); return logger; } } /* Log a message object */ /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Debug(object source, string message) { Debug(source.GetType(), message); } /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="ps">ps</param> public void Debug(object source, string message, params object[] ps) { Debug(source.GetType(), string.Format(message, ps)); } /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Debug(Type source, string message) { logger = GetLogger(source); if (logger.IsDebugEnabled) { logger.Debug(message); } } /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Info(object source, object message) { Info(source.GetType(), message); } /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Info(Type source, object message) { logger = GetLogger(source); if (logger.IsInfoEnabled) { logger.Info(message); } } /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Warn(object source, object message) { Warn(source.GetType(), message); } /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Warn(Type source, object message) { logger = GetLogger(source); if (logger.IsWarnEnabled) { logger.Warn(message); } } /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Error(object source, object message) { Error(source.GetType(), message); } /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Error(Type source, object message) { logger = GetLogger(source); if (logger.IsErrorEnabled) { logger.Error(message); } } /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Fatal(object source, object message) { Fatal(source.GetType(), message); } /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> public void Fatal(Type source, object message) { logger = GetLogger(source); if (logger.IsFatalEnabled) { logger.Fatal(message); } } /* Log a message object and exception */ /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Debug(object source, object message, Exception exception) { Debug(source.GetType(), message, exception); } /// <summary> /// 调试信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Debug(Type source, object message, Exception exception) { GetLogger(source).Debug(message, exception); } /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Info(object source, object message, Exception exception) { Info(source.GetType(), message, exception); } /// <summary> /// 关键信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Info(Type source, object message, Exception exception) { GetLogger(source).Info(message, exception); } /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Warn(object source, object message, Exception exception) { Warn(source.GetType(), message, exception); } /// <summary> /// 警告信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Warn(Type source, object message, Exception exception) { GetLogger(source).Warn(message, exception); } /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Error(object source, object message, Exception exception) { Error(source.GetType(), message, exception); } /// <summary> /// 错误信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Error(Type source, object message, Exception exception) { GetLogger(source).Error(message, exception); } /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Fatal(object source, object message, Exception exception) { Fatal(source.GetType(), message, exception); } /// <summary> /// 失败信息 /// </summary> /// <param name="source">source</param> /// <param name="message">message</param> /// <param name="exception">ex</param> public void Fatal(Type source, object message, Exception exception) { GetLogger(source).Fatal(message, exception); } }配置 log4net.config 文件，在 Web.Core.API 根目录下，添加 Log4net.config<?xml version="1.0" encoding="utf-8"?><configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/> </configSections> <system.web> <compilation debug="true" targetFramework="4.5.2" /> <httpRuntime targetFramework="4.5.2" /> </system.web> <log4net> <!--错误日志：：：记录错误日志--> <!--按日期分割日志文件 一天一个--> <!-- appender 定义日志输出方式 将日志以回滚文件的形式写到文件中。--> <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender"> <!--保存路径：下面路径项目启动的时候自动在C盘中创建log、logError文件--> <file value="log/error/error_" /> <!-- 如果想在本项目中添加路径，那就直接去掉C:\\ 只设置log\\LogError 项目启动中默认创建文件 --> <appendToFile value="true"/> <!--按照何种方式产生多个日志文件(日期[Date],文件大小[Size],混合[Composite])--> <rollingStyle value="Date"/> <!--这是按日期产生文件夹--> <datePattern value="yyyy-MM-dd'.log'"/> <!--是否只写到一个文件中--> <staticLogFileName value="false"/> <!--保留的log文件数量 超过此数量后 自动删除之前的 好像只有在 按Size分割时有效 设定值value="－1"为不限文件数--> <param name="MaxSizeRollBackups" value="100"/> <!--每个文件的大小。只在混合方式与文件大小方式下使用。超出大小后在所有文件名后自动增加正整数重新命名，数字最大的最早写入。可用的单位:KB|MB|GB。不要使用小数,否则会一直写入当前日志--> <maximumFileSize value="50MB" /> <!-- layout 控制Appender的输出格式，也可以是xml 一个Appender只能是一个layout--> <layout type="log4net.Layout.PatternLayout"> <!--每条日志末尾的文字说明--> <!--输出格式 模板--> <!-- <param name="ConversionPattern" value="记录时间：%date 线程ID:[%thread] 日志级别：%-5level 记录类：%logger 操作者ID：%property{Operator} 操作类型：%property{Action}%n 当前机器名:%property%n当前机器名及登录用户：%username %n 记录位置：%location%n 消息描述：%property{Message}%n 异常：%exception%n 消息：%message%newline%n%n" />--> <!--样例：2008-03-26 13:42:32,111 [10] INFO Log4NetDemo.MainClass [(null)] - info--> <!--<conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别： %-5level %n错误描述：%message%newline %n"/>--> <conversionPattern value="%n＝＝＝＝＝＝＝＝＝＝ %n【日志级别】%-5level %n【记录时间】%date %n【执行时间】[%r]毫秒 %n【错误位置】%logger 属性[%property{NDC}] %n【错误描述】%message %n【错误详情】%newline"/> </layout> <filter type="log4net.Filter.LevelRangeFilter,log4net"> <levelMin value="ERROR" /> <levelMax value="FATAL" /> </filter> </appender> <!--DEBUG：：：记录DEBUG日志--> <!--按日期分割日志文件 一天一个--> <!-- appender 定义日志输出方式 将日志以回滚文件的形式写到文件中。--> <appender name="DebugAppender" type="log4net.Appender.RollingFileAppender"> <!--保存路径：下面路径项目启动的时候自动在C盘中创建log、logError文件--> <file value="log/debug/debug_" /> <!-- 如果想在本项目中添加路径，那就直接去掉C:\\ 只设置log\\LogError 项目启动中默认创建文件 --> <appendToFile value="true"/> <!--按照何种方式产生多个日志文件(日期[Date],文件大小[Size],混合[Composite])--> <rollingStyle value="Date"/> <!--这是按日期产生文件夹--> <datePattern value="yyyy-MM-dd'.log'"/> <!--是否只写到一个文件中--> <staticLogFileName value="false"/> <!--保留的log文件数量 超过此数量后 自动删除之前的 好像只有在 按Size分割时有效 设定值value="－1"为不限文件数--> <param name="MaxSizeRollBackups" value="100"/> <!--每个文件的大小。只在混合方式与文件大小方式下使用。超出大小后在所有文件名后自动增加正整数重新命名，数字最大的最早写入。可用的单位:KB|MB|GB。不要使用小数,否则会一直写入当前日志--> <maximumFileSize value="50MB" /> <!-- layout 控制Appender的输出格式，也可以是xml 一个Appender只能是一个layout--> <layout type="log4net.Layout.PatternLayout"> <!--每条日志末尾的文字说明--> <!--输出格式 模板--> <!-- <param name="ConversionPattern" value="记录时间：%date 线程ID:[%thread] 日志级别：%-5level 记录类：%logger 操作者ID：%property{Operator} 操作类型：%property{Action}%n 当前机器名:%property%n当前机器名及登录用户：%username %n 记录位置：%location%n 消息描述：%property{Message}%n 异常：%exception%n 消息：%message%newline%n%n" />--> <!--样例：2008-03-26 13:42:32,111 [10] INFO Log4NetDemo.MainClass [(null)] - info--> <!--<conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别： %-5level %n错误描述：%message%newline %n"/>--> <conversionPattern value="%n＝＝＝＝＝＝＝＝＝＝ %n【日志级别】%-2level %n【记录时间】%date %n【执行时间】[%r]毫秒 %n【debug位置】%logger 属性[%property{NDC}] %n【debug描述】%message"/> </layout> <filter type="log4net.Filter.LevelRangeFilter,log4net"> <levelMin value="DEBUG" /> <levelMax value="WARN" /> </filter> </appender> <!--Set root logger level to DEBUG and its only appender to A1--> <root> <!--控制级别，由低到高: ALL|DEBUG|INFO|WARN|ERROR|FATAL|OFF--> <level value="ALL" /> <appender-ref ref="DebugAppender" /> <appender-ref ref="ErrorAppender" /> </root> </log4net></configuration>接下来是定义全局异常过滤器：在program.cs中注入日志服务
//log日志注入builder.Services.AddSingleton<ILoggerHelper, LogHelper>();Web.Core.API 新建Filter 文件夹，添加 GlobalExceptionFilter.cs
/// <summary> /// 全局异常错误日志 /// </summary> public class GlobalExceptionsFilter : IExceptionFilter { private readonly IWebHostEnvironment _env; private readonly ILoggerHelper _loggerHelper; public GlobalExceptionsFilter(IWebHostEnvironment env, ILoggerHelper loggerHelper) { _env = env; _loggerHelper = loggerHelper; } public void OnException(ExceptionContext context) { var json = new JsonErrorResponse(); json.Message = context.Exception.Message;//错误信息 if (_env.IsDevelopment()) { json.DevelopmentMessage = context.Exception.StackTrace;//堆栈信息 } context.Result = new InternalServerErrorObjectResult(json); //采用log4net 进行错误日志记录 _loggerHelper.Error(json.Message, WriteLog(json.Message, context.Exception)); } /// <summary> /// 自定义返回格式 /// </summary> /// <param name="throwMsg"></param> /// <param name="ex"></param> /// <returns></returns> public string WriteLog(string throwMsg, Exception ex) { return string.Format("【自定义错误】：{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 }); } } public class InternalServerErrorObjectResult : ObjectResult { public InternalServerErrorObjectResult(object value) : base(value) { StatusCode = StatusCodes.Status500InternalServerError; } } //返回错误信息 public class JsonErrorResponse { /// <summary> /// 生产环境的消息 /// </summary> public string Message { get; set; } /// <summary> /// 开发环境的消息 /// </summary> public string DevelopmentMessage { get; set; } }在program.cs中注入全局异常捕获：
builder.Services.AddControllers(options =>{ options.SuppressAsyncSuffixInActionNames = false; options.Filters.Add(typeof(GlobalExceptionsFilter));})将appsettings.json中数据库字符串故意写错，测试异常记录
错误日志会记录到异常文件夹下
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