log4j.properties 配置(实例讲解)

!-- log4j --><dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version></dependency><dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.4</version></dependency><dependency>  <groupId>org.slf4j</groupId>  <artifactId>slf4j-log4j12</artifactId>  <version>1.7.4</version>  <scope>runtime</scope> </dependency> 

### set log levels ###log4j.rootLogger = DEBUG , C , D , E ### console ###log4j.appender.C = org.apache.log4j.ConsoleAppenderlog4j.appender.C.Target = System.outlog4j.appender.C.layout = org.apache.log4j.PatternLayoutlog4j.appender.C.layout.ConversionPattern = [mybatis_study][%p] [%-d{yyyy-MM-dd HH/:mm/:ss}] %C.%M(%L) | %m%n### log file ###log4j.appender.D = org.apache.log4j.DailyRollingFileAppenderlog4j.appender.D.File = ../logs/mybatis_study.loglog4j.appender.D.Append = truelog4j.appender.D.Threshold = INFO log4j.appender.D.layout = org.apache.log4j.PatternLayoutlog4j.appender.D.layout.ConversionPattern = [mybatis_study][%p] [%-d{yyyy-MM-dd HH/:mm/:ss}] %C.%M(%L) | %m%n### exception ###log4j.appender.E = org.apache.log4j.DailyRollingFileAppenderlog4j.appender.E.File = ../logs/mybatis_study_error.log log4j.appender.E.Append = truelog4j.appender.E.Threshold = ERROR log4j.appender.E.layout = org.apache.log4j.PatternLayoutlog4j.appender.E.layout.ConversionPattern = [mybatis_study][%p] [%-d{yyyy-MM-dd HH/:mm/:ss}] %C.%M(%L) | %m%n###mybatis show sql###log4j.logger.com.ibatis=debuglog4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debuglog4j.logger.com.ibatis.common.jdbc.ScriptRunner=debuglog4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debuglog4j.logger.java.sql.Connection=debuglog4j.logger.java.sql.Statement=debuglog4j.logger.java.sql.PreparedStatement=debug

<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">  <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">   <!-- [控制台STDOUT] -->   <appender name="console" class="org.apache.log4j.ConsoleAppender">    <param name="encoding" value="GBK" />    <param name="target" value="System.out" />    <layout class="org.apache.log4j.PatternLayout">    <param name="ConversionPattern" value="%-5p %c{2} - %m%n" />    </layout>   </appender>   <!-- [公共Appender] -->   <appender name="DEFAULT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">    <param name="File" value="${webapp.root}/logs/rms-default.log" />    <param name="Append" value="true" />    <param name="encoding" value="GBK" />    <param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />    <layout class="org.apache.log4j.PatternLayout">   <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" />    </layout>   </appender>   <!-- [错误日志APPENDER] -->   <appender name="ERROR-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">    <param name="File" value="${webapp.root}/logs/rms-error.log" />    <param name="Append" value="true" />    <param name="encoding" value="GBK" />    <param name="threshold" value="error" />    <param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />    <layout class="org.apache.log4j.PatternLayout">    <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" />    </layout>   </appender>   <!-- Root Logger -->   <root>    <level value="${rootLevel}"></level>    <appender-ref ref="DEFAULT-APPENDER" />    <appender-ref ref="ERROR-APPENDER" />    <appender-ref ref="console" />   </root>  </log4j:configuration>