1.pom依赖
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
此外,需要注意排除净第三方jar间接引入的log相关jar,否则可能出现log4j2配置没有生效,log莫名其妙打到其它路径或者看不到。
2.log4j2.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<!-- 日志级别以及优先级排序: OFF > FATAL > ERROR > WARN > INFO > DEBUG > TRACE > ALL -->
<!-- status log4j2内部日志级别 -->
<configuration status="INFO">
<!-- 全局参数 -->
<Properties>
<Property name="pattern">%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p (%c{1}:%L) - %m%n</Property>
<Property name="displayName">../logs/user</Property>
</Properties>
<Appenders>
<Console name="console" target="SYSTEM_OUT" follow="true">
<PatternLayout>
<pattern>${pattern}</pattern>
</PatternLayout>
</Console>
<!-- 滚动文件 -->
<RollingFile name="app_info" fileName="${displayName}_info.log"
filePattern="${displayName}_info_%d{yyyy-MM-dd-HH}.log">
<PatternLayout>
<pattern>${pattern}</pattern>
</PatternLayout>
<Filters>
<!-- 当前appender只打印info日志,warn及以上日志忽略,由后面的appender决定是否需要打印 -->
<ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
<ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>
<!-- 按大小划分 -->
<TimeBasedTriggeringPolicy modulate="true" interval="1"/>
<DefaultRolloverStrategy max="72" /> <!--文件夹下最多的文件个数 -->
</RollingFile>
<!-- 滚动文件 -->
<RollingFile name="app_error" fileName="${displayName}_error.log"
filePattern="${displayName}_error_%d{yyyy-MM-dd-HH}.log">
<PatternLayout>
<pattern>${pattern}</pattern>
</PatternLayout>
<Filters>
<ThresholdFilter level="WARN" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>
<!-- 按大小划分 -->
<TimeBasedTriggeringPolicy modulate="true" interval="1"/>
<DefaultRolloverStrategy max="72" /> <!--文件夹下最多的文件个数 -->
</RollingFile>
<!-- 打印一些中间件诸如DSF的日志 -->
<RollingFile name="system" fileName="${displayName}_system.log"
filePattern="${displayName}_system_%d{yyyy-MM-dd-HH}.log">
<PatternLayout>
<pattern>${pattern}</pattern>
</PatternLayout>
<!-- 按大小划分 -->
<TimeBasedTriggeringPolicy modulate="true" interval="1"/>
<DefaultRolloverStrategy max="72" /> <!--文件夹下最多的文件个数 -->
</RollingFile>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="console"/>
<AppenderRef ref="system"/>
</Root>
<Logger name="com.xxx.yeast" level="info" includeLocation="false" additivity="false">
<AppenderRef ref="app_info"/>
<AppenderRef ref="app_error"/>
</Logger>
</Loggers>
</configuration>
参考链接