一般我们都会使用数据库和文件作为log的输出介质,下面是我在项目实践中总结到的经验:
1 ．ADONetAppender
（ 1 ）、 MS SQL Server
define the table such as:
CREATE TABLE [dbo].[Log] (
[Id] [int] IDENTITY (1, 1) NOT NULL,
[Date] [datetime] NOT NULL,
[Thread] [varchar] (255) NOT NULL,
[Level] [varchar] (50) NOT NULL,
[Logger] [varchar] (255) NOT NULL,
[Message] [varchar] (4000) NOT NULL,
[Exception] [varchar] (2000) NULL
)
<appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
<bufferSize value="100" />
<connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<connectionString value="data source=[database server];initial catalog=[database name];integrated security=false;persist security info=True;User ID=[user];Password=[password]" />
<commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)" />
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
<parameter>
<parameterName value="@thread" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%thread" />
</layout>
</parameter>
<parameter>
<parameterName value="@log_level" />
<dbType value="String" />
<size value="50" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level" />
</layout>
</parameter>
<parameter>
<parameterName value="@logger" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%logger" />
</layout>
</parameter>
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="4000" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
<parameter>
<parameterName value="@exception" />
<dbType value="String" />
<size value="2000" />
<layout type="log4net.Layout.ExceptionLayout" />
</parameter>
</appender>
（ 2 ）、 MS Access please reference the SDK of Log4net document
（ 3 ）、 Oracle9i log4net/release/config-examples.html
（ 4 ）、 Oracle8i
（ 5 ）、 DB2
2 、 FileAppender
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="log-file.txt" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
4． RemotingAppender
传送日志事件到达一个特定的接受器，sink定义了这个接受器的地址，lossy定义了没有丢弃事件，bufferSize 定义了一个black的由95个事件打包发送的，而onlyFixPartialEventData可以忽律一些特定的事件。
<appender name="RemotingAppender" type="log4net.Appender.RemotingAppender" >
<sink value="tcp://localhost:8085/LoggingSink" />
<lossy value="false" />
<bufferSize value="95" />
<onlyFixPartialEventData value="true" />
</appender>
5． RollingFileAppender
由于定义了staticLogFileName 为true，以我的理解就是定位保存的log文件个数为10个(maxSizeRollBackups),同时设定了每个文件的大小为100KB，所以一直都保持有10个文件。RollingStyle设定rolling的触发器。
Eg1:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="log.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout>
</appender>
eg2:
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logfile" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd-HHmm" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
eg3:
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logfile" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<datePattern value="yyyyMMdd" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1MB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
6． UdpAppender
可以发送到远程地址的特定端口
<appender name="UdpAppender" type="log4net.Appender.UdpAppender">
<localPort value="8080" />
<remoteAddress value="224.0.0.1" />
<remotePort value="8080" />
<layout type="log4net.Layout.PatternLayout, log4net">
<conversionPattern value="%-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
log4net 的学习暂时告一段落了,希望能够进一步对log4j学习,现在我越来越喜欢.net的东西了,再也不会感觉到很别扭!希望自己可以很快地强大起来!!!