springboot log4j的坑

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我是靠谱客的博主甜美纸飞机，这篇文章主要介绍springboot log4j的坑，现在分享给大家，希望可以做个参考。

参考连接

blog.csdn.net/huangyaa729…

1、坑，pom.xml

哪种启动方式

web启动这种方式，不需要去掉引用，

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<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
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2、坑，版本冲突，版本不支持

1.3.8以后的spring boot版本对log4j不支持

3、log4j.xml不加载

可以在application.properties文件中指定： logging.config=classpath:log4j2.xml ；

log4j.xml

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<configuration>

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d %p (%file:%line)- %m%n</pattern>
<charset>UTF-8</charset>
</encoder>
</appender>
<appender name="baselog"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<File>log/base.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>./log/base.log.%d.%i</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">

<maxFileSize>32 MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>
%d %p (%file:%line)- %m%n
</pattern>
<charset>UTF-8</charset> 
</encoder>
</appender>
<root level="info">
<appender-ref ref="STDOUT"></appender-ref>
</root>
<logger name="com.**" level="DEBUG">

<appender-ref ref="baselog"></appender-ref>
</logger>
</configuration>
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<configuration>
<!-- %m输出的信息,%p日志级别,%t线程名,%d日期,%c类的全名,,,, -->
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d %p (%file:%line)- %m%n</pattern>
<charset>UTF-8</charset>
</encoder>
</appender>
<appender name="baselog"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<File>log/base.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>./log/base.log.%d.%i</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<!-- or whenever the file size reaches 32 MB -->
<maxFileSize>32 MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>
%d %p (%file:%line)- %m%n
</pattern>
<charset>UTF-8</charset> <!-- 此处设置字符集 -->
</encoder>
</appender>
<root level="info">
<appender-ref ref="STDOUT"/>
</root>
<logger name="com.**" level="DEBUG">
<!-- 监控的包名，自己的包结构，在最后我会贴出我的包结构-->
<appender-ref ref="baselog"/>
</logger>
</configuration>
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