实现自定义json日志输出

log4net-json/Appender.cs

@@ -1,43 +1,31 @@
-using log4net.Appender;
+using log4net.Core;
-using log4net.Core;
+using log4net.Layout;
-using System;
+using Newtonsoft.Json;
-using System.Collections.Generic;
+using System.Numerics;
-using System.Collections.ObjectModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace log4net_json
 {
-    public class CollectionAppender : AppenderSkeleton
+    public class CustomLayout : PatternLayout
     {
-        public static ObservableCollection<LogItem> logData = new ObservableCollection<LogItem>();
+        #region Public Methods and Operators
-        protected override void Append(LoggingEvent loggingEvent)
-        {
-            logData.Add(new LogItem(loggingEvent));
-        }
-    }
-
-    public class LogItem
-    {
-        public string Logger { get; private set; }
-        public string Level { get; private set; }
-        public string Message { get; private set; }
-        public DateTime Timestamp { get; private set; }
-        public Exception ExceptionData { get; private set; }
 
-        public bool ShouldSerializeExceptionData() //This keeps things tidy when using Json.net for non exemption entries.
+        public override void Format(TextWriter writer, LoggingEvent loggingEvent)
         {
-            return ExceptionData != null;
+            var message = loggingEvent.MessageObject.GetType().IsPrimitive || loggingEvent.MessageObject is string || loggingEvent.MessageObject is decimal || loggingEvent.MessageObject is BigInteger
-        }
+                ? new { message = loggingEvent.MessageObject }
+                : loggingEvent.MessageObject;
 
-        public LogItem(LoggingEvent data)
+            writer.WriteLine(JsonConvert.SerializeObject(new
-        {
+            {
-            Logger = data.LoggerName;
+                timestamp = loggingEvent.TimeStampUtc,
-            Level = data.Level.DisplayName;
+                threadId = loggingEvent.ThreadName,
-            Message = data.RenderedMessage;
+                details = message,
-            Timestamp = data.TimeStamp;
+                logger = loggingEvent.LoggerName,
-            ExceptionData = data.ExceptionObject;
+                level = loggingEvent.Level.DisplayName,
+                user = loggingEvent.UserName
+            }));
         }
+
+        #endregion
     }
 }

log4net-json/log4net-json.csproj

@@ -11,6 +11,7 @@
   <ItemGroup>
     <PackageReference Include="log4net" Version="2.0.14" />
     <PackageReference Include="log4net.Ext.Json" Version="2.0.10.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>

log4net-json/log4net.config

@@ -38,15 +38,36 @@
         <decorator type='log4net.Layout.Decorators.StandardTypesDecorator, log4net.Ext.Json' />
         <default />
         <remove value='message' />
+        <remove value='ndc' />
+        <member value='version:2.0' />
         <member value='message:messageobject' />
       </layout>
     </appender>
+    <appender name="RollingLogFileAppender2" type="log4net.Appender.RollingFileAppender">
+      <!--日志路径-->
+      <param name= "File" value= "logs/"/>
+      <!--多线程时采用最小锁定-->
+      <lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
+      <!--是否是向文件中追加日志-->
+      <param name= "AppendToFile" value= "true"/>
+      <!--log保留天数-->
+      <!--<param name= "MaxSizeRollBackups" value= "10"/>-->
+      <!--日志文件名是否是固定不变的-->
+      <param name= "StaticLogFileName" value= "false"/>
+      <!--日志文件名格式为:2022-05-22.log-->
+      <param name= "DatePattern" value= "yyyy-MM-dd'.log'"/>
+      <!--日志根据日期滚动-->
+      <param name= "RollingStyle" value= "Date"/>
+      <layout type="log4net_json.CustomLayout">
+        <conversionPattern value="%level %thread %logger - %preparedMessage%newline" />
+      </layout>
+    </appender>
 
     <root>
       <!--(高) OFF > FATAL > ERROR > WARN > INFO > DEBUG > ALL (低) -->
       <level value="all" />
-      <!--<appender-ref ref="ColoredConsoleAppender"/>-->
+      <!--<appender-ref ref="RollingLogFileAppender"/>-->
-      <appender-ref ref="RollingLogFileAppender"/>
+      <appender-ref ref="RollingLogFileAppender2"/>
     </root>
   </log4net>
 </configuration>