2、springboot 集成 log4j2

1、Spring boot默认是使用logback来进行日志记录,而大多数框架依赖log4j，即将logback替换为log4j2

 

2、引入log4j2 的maven依赖

 

 

3、如果引入springboot 其他组件的自动启动包，也要注意是否默认启用了logback ，例如aop启动包也需要去除logback依赖

4、配置log4j2的启动参数

配置文件放在src/main/java/application 下，命名为log4j2.xml ，项目启动时，log4j2会自动到这个目录加载配置文件
也可以在application.properties 中配置路径：logging.config=classpath:log4j2.xml

***配置文件中加了详细的配置说明，具体参数不再重复解释；

      log4j2 配置文件（xml）

xml version="1.0" encoding="UTF-8"?> <configuration status="debug">          <appenders>           <Console name="Console" target="SYSTEM_OUT">                          <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>             <PatternLayout pattern="[%d{HH:mm:ss.SSS}] %-5level %class{36} %L %M - %msg%xEx%n"/>         Console>                             <RollingFile name="RollingFileDebug" fileName="./logs/debug.log"                      filePattern="logs/$${date:yyyy-MM}/debug-%d{yyyy-MM-dd}-%i.log.gz">                          <Filters>                 <ThresholdFilter level="DEBUG"/>                 <ThresholdFilter level="INFO" onMatch="DENY" onMismatch="NEUTRAL"/>             Filters>                          <PatternLayout                     pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>                          <Policies>                                  <TimeBasedTriggeringPolicy interval="1" modulate="true"/>                                  <SizeBasedTriggeringPolicy size="200 MB"/>               Policies>         RollingFile>                    <RollingFile name="RollingFileInfo" fileName="./logs/info.log"                      filePattern="logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log.gz">             <Filters>                                  <ThresholdFilter level="INFO"/>                 <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>             Filters>             <PatternLayout                     pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>             <Policies>                                  <TimeBasedTriggeringPolicy interval="1" modulate="true"/>                                  <SizeBasedTriggeringPolicy size="200 MB"/>             Policies>         RollingFile>                    <RollingFile name="RollingFileWarn" fileName="./logs/warn.log"                      filePattern="logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log.gz">             <Filters>                 <ThresholdFilter level="WARN"/>                 <ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>             Filters>             <PatternLayout                     pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>             <Policies>                                  <TimeBasedTriggeringPolicy interval="1" modulate="true"/>                                  <SizeBasedTriggeringPolicy size="200 MB"/>             Policies>         RollingFile>                    <RollingFile name="RollingFileError" fileName="./logs/error.log"                      filePattern="logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log.gz">             <ThresholdFilter level="ERROR"/>             <PatternLayout                     pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>             <Policies>                                  <TimeBasedTriggeringPolicy interval="1" modulate="true"/>                                  <SizeBasedTriggeringPolicy size="200 MB"/>             Policies>         RollingFile>                       appenders>       <loggers>                           <root level="all">             <appender-ref ref="Console" level="info"/>             <appender-ref ref="RollingFileInfo" level="info"/>             <appender-ref ref="RollingFileWarn" level="warn"/>             <appender-ref ref="RollingFileError" level="error"/>             <appender-ref ref="RollingFileDebug" level="debug"/>         root>                                                <Logger name="org.springframework" level="INFO"/>         <Logger name="org.mybatis" level="debug"/>         <Logger name="org.apache.catalina.startup.DigesterFactory" level="error" />         <Logger name="org.apache.catalina.util.LifecycleBase" level="error" />         <Logger name="org.apache.coyote.http11.Http11NioProtocol" level="warn" />         <logger name="org.apache.sshd.common.util.SecurityUtils" level="warn"/>         <Logger name="org.apache.tomcat.util.net.NioSelectorPool" level="warn" />         <Logger name="org.crsh.plugin" level="warn" />         <logger name="org.crsh.ssh" level="warn"/>         <Logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="error" />         <Logger name="org.hibernate.validator.internal.util.Version" level="warn" />         <logger name="org.springframework.boot.actuate.autoconfigure.CrshAutoConfiguration" level="warn"/>         <logger name="org.springframework.boot.actuate.endpoint.jmx" level="warn"/>         <logger name="org.thymeleaf" level="warn"/>     loggers> configuration>