前言

log4j2配置文件有不少配置，下面罗列一些，方便快速查看。

简单的配置

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <Configuration status="INFO">
  3.     <Appenders>
  4.         <Console name="Console" target="SYSTEM_OUT">
  5.             <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
  6.         </Console>
  7.         <File name="MyFile" fileName="all.log" immediateFlush="false" append="false">
  8.             <PatternLayout pattern="%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
  9.         </File>
  10.     </Appenders>
  11.     <Loggers>
  12.         <Root level="debug">
  13.             <AppenderRef ref="Console" />
  14.             <AppenderRef ref="MyFile"/>
  15.         </Root>
  16.     </Loggers>
  17. </Configuration>

严格模式的配置

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <Configuration monitorinterval="30" status="info" strict="true">
  3.     <Properties>
  4.         <Property name="filename">log/CelsiusConverter.log</Property>
  5.     </Properties>
  6.     <Appenders>
  7.         <Appender type="Console" name="Console">
  8.             <Layout type="PatternLayout" pattern="%d %p [%t] %m%n" />
  9.         </Appender>
  10.         <Appender type="Console" name="FLOW">
  11.             <Layout type="PatternLayout" pattern="%C{1}.%M %m %ex%n" />
  12.         </Appender>
  13.         <Appender type="File" name="File" fileName="${filename}">
  14.             <Layout type="PatternLayout" pattern="%d %p %C{1.} [%t] %m%n" />
  15.         </Appender>
  16.     </Appenders>
  17.     <Loggers>
  18.         <Root level="debug">
  19.             <AppenderRef ref="File" />
  20.             <AppenderRef ref="Console" />
  21.             <!-- Use FLOW to trace down exact method sending the msg -->
  22.             <!-- <AppenderRef ref="FLOW" /> -->
  23.         </Root>
  24.     </Loggers>
  25. </Configuration>

完整配置

  1. <?xml version="1.0" encoding="UTF-8"?>  
  2.  <!--Configuration后面的status，这个用于设置log4j2自身内部的信息输出，可以不设置-->  
  3.  <!--monitorInterval：Log4j能够自动检测修改配置 文件和重新配置本身，设置间隔秒数-->  
  4.  <configuration status="WARN" monitorInterval="30">  
  5.     <!--先定义所有的appender-->  
  6.      <appenders>  
  7.         <!--输出到控制台-->  
  8.          <console name="Console" target="SYSTEM_OUT">  
  9.          <!--输出日志的格式-->  
  10.              <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>  
  11.          </console>  
  12.         <!--打印到文件中，这个log每次运行程序会自动清空，由append属性决定-->  
  13.         <File name="log" fileName="log/test.log" append="false">  
  14.             <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>  
  15.          </File>  
  16.         <!--文件滚动, 这个会打印出所有的info及以下级别的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档-->  
  17.          <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"  
  18.                       filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">  
  19.              <!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch）-->          
  20.              <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>  
  21.              <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>  
  22.              <Policies>  
  23.                  <DefaultRolloverStrategy max="20"/>   <!--文件夹下最多的文件个数-->  
  24.                  <TimeBasedTriggeringPolicy interval="2 hour"/>           <!--多长时间滚动一次-->  
  25.                  <SizeBasedTriggeringPolicy size="100 MB"/>       <!-- 一个日志文件的最大大小 -->  
  26.              </Policies>  
  27.          </RollingFile>  
  30.      </appenders>  
  31.      <!--然后定义logger，只有定义了logger并引入的appender，appender才会生效-->  
  32.      <loggers>  
  33.          <!--过滤掉spring和mybatis的一些无用的DEBUG信息-->  
  34.         <logger name="org.springframework" level="INFO"></logger>  
  35.          <logger name="org.mybatis" level="INFO"></logger>  
  36.          <root level="all">          
  37.             <appender-ref ref="Console"/>  
  38.              <appender-ref ref="RollingFileInfo"/>  
  39.              <appender-ref ref="RollingFileWarn"/>  
  40.              <appender-ref ref="RollingFileError"/>  
  41.          </root>  
  42.      </loggers>  
  43.  </configuration>

tomcat web 配置

  1. <context-param>  
  2.     <param-name>log4jConfiguration</param-name>  
  3.     <param-value>/WEB-INF/conf/log4j2.xml</param-value>  
  4. </context-param>  
  6. <listener>  
  7.     <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>  
  8. </listener>

项目中的配置

dev环境

  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <Configuration status="warn">
  3.     <Appenders>
  4.         <Console name="STOUT" target="SYSTEM_OUT">
  5.             <PatternLayout
  6.                     pattern="%highlight{%d [%t] %-5level: %msg%n%throwable}{FATAL=white, ERROR=red, WARN=blue, INFO=black, DEBUG=green, TRACE=blue}"/>
  7.         </Console>
  8.     </Appenders>
  10.     <Loggers>
  11.         <Root level="all">
  12.             <AppenderRef ref="STOUT"/>
  13.         </Root>
  14.     </Loggers>
  15. </Configuration>

test环境

  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <Configuration status="warn">
  3.     <properties>
  4.         <property name="logPath">
  5.             /project/backend/code/
  6.         </property>
  7.     </properties>
  8.     <customLevels>
  9.         <customLevel name="BIZ" intLevel="350"/>
  10.     </customLevels>
  11.     <Appenders>
  12.         <RollingRandomAccessFile name="ERROR_LOGGER" fileName="${logPath}/logs2/error/error.log"
  13.                                  filePattern="${logPath}/logs2/error/error.log.%d{yyyy-MM-dd-HH}">
  14.             <PatternLayout>
  15.                 <Pattern>[date:%d{DEFAULT}] [%t] %5level %c{1}: %msg%n</Pattern>
  16.             </PatternLayout>
  17.             <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
  18.             <Policies>
  19.                 <TimeBasedTriggeringPolicy/>
  20.                 <SizeBasedTriggeringPolicy size="400 MB"/>
  21.             </Policies>
  22.             <DefaultRolloverStrategy max="20"/>
  23.         </RollingRandomAccessFile>
  24.         <RollingRandomAccessFile name="BIZ_LOGGER" fileName="${logPath}/logs2/biz/biz.log"
  25.                                  filePattern="${logPath}/logs2/biz/biz.log.%d{yyyy-MM-dd-HH}">
  26.             <PatternLayout>
  27.                 <Pattern>[date:%d{DEFAULT}] [%t] %5level %c{1}: %msg%n</Pattern>
  28.             </PatternLayout>
  29.             <filters>
  30.                 <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
  31.                 <ThresholdFilter level="warn" onMatch="DENY" onMismatch="NEUTRAL"/>
  32.                 <ThresholdFilter level="biz" onMatch="ACCEPT" onMismatch="DENY"/>
  33.             </filters>
  34.             <Policies>
  35.                 <TimeBasedTriggeringPolicy/>
  36.                 <SizeBasedTriggeringPolicy size="400 MB"/>
  37.             </Policies>
  38.             <DefaultRolloverStrategy max="20"/>
  39.         </RollingRandomAccessFile>
  40.         <RollingRandomAccessFile name="INFO_LOGGER" fileName="${logPath}/logs2/info/info.log"
  41.                                  filePattern="${logPath}/logs2/info/info.log.%d{yyyy-MM-dd-HH}">
  42.             <PatternLayout>
  43.                 <Pattern>[date:%d{DEFAULT}] [%t] %5level %c{1}: %msg%n</Pattern>
  44.             </PatternLayout>
  45.             <filters>
  46.                 <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
  47.                 <ThresholdFilter level="warn" onMatch="DENY" onMismatch="NEUTRAL"/>
  48.                 <ThresholdFilter level="biz" onMatch="DENY" onMismatch="NEUTRAL"/>
  49.                 <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
  50.             </filters>
  51.             <Policies>
  52.                 <TimeBasedTriggeringPolicy/>
  53.                 <SizeBasedTriggeringPolicy size="400 MB"/>
  54.             </Policies>
  55.             <DefaultRolloverStrategy max="20"/>
  56.         </RollingRandomAccessFile>
  57.         <!--###################################-->
  58.         <RollingRandomAccessFile name="TRACE_ERROR_LOGGER" fileName="${logPath}/logs2/trace/error.log"
  59.                                  filePattern="${logPath}/logs2/trace/trace.log.%d{yyyy-MM-dd-HH}">
  60.             <PatternLayout>
  61.                 <Pattern>[date:%d{DEFAULT}] [%t] %5level %c{1}: %msg%n</Pattern>
  62.             </PatternLayout>
  63.             <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
  64.             <Policies>
  65.                 <TimeBasedTriggeringPolicy/>
  66.                 <SizeBasedTriggeringPolicy size="400 MB"/>
  67.             </Policies>
  68.             <DefaultRolloverStrategy max="20"/>
  69.         </RollingRandomAccessFile>
  70.         <RollingRandomAccessFile name="TRACE_SQL_LOGGER" fileName="${logPath}/logs2/trace/sql.log"
  71.                                  filePattern="${logPath}/logs2/sql/sql.log.%d{yyyy-MM-dd-HH}">
  72.             <PatternLayout>
  73.                 <Pattern>[date:%d{DEFAULT}] [%t] %5level %c{1}: %msg%n</Pattern>
  74.             </PatternLayout>
  75.             <Policies>
  76.                 <TimeBasedTriggeringPolicy/>
  77.                 <SizeBasedTriggeringPolicy size="400 MB"/>
  78.             </Policies>
  79.             <DefaultRolloverStrategy max="20"/>
  80.         </RollingRandomAccessFile>
  81.     </Appenders>
  83.     <Loggers>
  84.         <Logger name="com.alibaba.druid" additivity="false" level="info">
  85.             <AppenderRef ref="TRACE_SQL_LOGGER"/>
  86.         </Logger>
  87.         <Root level="info">
  88.             <AppenderRef ref="ERROR_LOGGER" level="error"/>
  89.             <AppenderRef ref="BIZ_LOGGER" level="biz"/>
  90.             <AppenderRef ref="INFO_LOGGER" level="info"/>
  91.         </Root>
  92.     </Loggers>
  93. </Configuration>

参考