Log4j2 + SLF4J开箱即用的配置

太过爱你忘了你带给我的痛 2022-05-18 03:38 216阅读 0赞

网上有很多关于Log4j2和SLF4J的文章，我就不再赘述了，直接上我在项目中的使用的`log4j2.xml`配置文件，也算是一个总结记录吧，以后随时补充进来。

##### Maven dependency #####

<dependencies>
       
    	<dependency>
    	    <groupId>org.apache.logging.log4j</groupId>
    	    <artifactId>log4j-core</artifactId>
          	<version>2.11.0</version>
    	</dependency>
    	<dependency>
    	    <groupId>org.apache.logging.log4j</groupId>
    	    <artifactId>log4j-api</artifactId>
       	    <version>2.11.0</version>
    	</dependency>
        
    	<dependency>
    	    <groupId>org.apache.logging.log4j</groupId>
    	    <artifactId>log4j-slf4j-impl</artifactId>
    	    <version>2.11.0</version>
    	</dependency>
    	
    	
    	<dependency>
    	    <groupId>org.slf4j</groupId>
    	    <artifactId>jcl-over-slf4j</artifactId>
    	    <version>1.7.25</version>
       </dependency>
    
    </dependencies>

#### log4j2.xml ####

<?xml version="1.0" encoding="UTF-8"?>
    <Configuration status="WARN">
        <Properties>
            <Property name="LOG_PATH">/data/log/project-name</Property>
            <Property name="FILE_NAME">app</Property>
            <Property name="ERROR_FILE_NAME">error</Property>
        </Properties>
    
        <Appenders>
            <Console name="Console" target="SYSTEM_OUT">
                <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - [%X{requestId}] %msg%n"/>
            </Console>
    
            
            <RollingRandomAccessFile name="RollingFile" fileName="${LOG_PATH}/${FILE_NAME}.log" filePattern="${LOG_PATH}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd}-%i.log">
                
                <ThresholdFilter level="TRACE" onMatch="ACCEPT" onMismatch="DENY"/>
                 
                <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss:SSS} [%t] %-5level %logger{36} - [%X{requestId}] %msg%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    
                    <SizeBasedTriggeringPolicy size="500 MB" />
                </Policies>
                
                <DefaultRolloverStrategy max="5">
                        <Delete basePath="${LOG_PATH}" maxDepth="2">
                            <IfFileName glob="*.log">
                                
                                <IfLastModified age="7d">
                                    <IfAny>
                                        <IfAccumulatedFileCount exceeds="5" />
                                    </IfAny>
                                </IfLastModified>
                            </IfFileName>
                        </Delete>
                  </DefaultRolloverStrategy>
            </RollingRandomAccessFile>
    
            
            <RollingRandomAccessFile name="ErrorFile" fileName="${LOG_PATH}/${ERROR_FILE_NAME}.log" filePattern="${LOG_PATH}/$${date:yyyy-MM}/${ERROR_FILE_NAME}-%d{yyyy-MM-dd}-%i.log">
                <Filters>
                    <ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY"/>
                </Filters>
                <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss:SSS} [%t] %-5level %logger{36} - [%X{requestId}] %msg%n"/>
                <Policies>
                    <TimeBasedTriggeringPolicy/>
                    <SizeBasedTriggeringPolicy size="500 MB" />
                </Policies>
                
                <DefaultRolloverStrategy max="30"/>
            </RollingRandomAccessFile>
            <Async name="Async">
                <AppenderRef ref="Console"/>
                <AppenderRef ref="RollingFile"/>
                <AppenderRef ref="ErrorFile" />
            </Async>
        </Appenders>
    
        <Loggers>
             
            <Logger name="com.jiaobuchong" level="DEBUG" additivity="false">
                <AppenderRef ref="Async" />
            </Logger>
    
            
            <Root level="INFO">
                <AppenderRef ref="Async"/>
            </Root>
        </Loggers>
    </Configuration>

参考：  
这篇总结得很好，涵盖log4j2常用的配置项讲解：[log4j2 入门教程][log4j2]  
日志文件 Rolling 机制看这篇就好了：[Log4j2中RollingFile的文件滚动更新机制][Log4j2_RollingFile]  
官方文档：[http://logging.apache.org/log4j/2.x/manual/appenders.html\#DeleteIfFileName][http_logging.apache.org_log4j_2.x_manual_appenders.html_DeleteIfFileName]  
[详解log4j2(上) - 从基础到实战][log4j2_ -]  
[使用Slf4j集成Log4j2构建项目日志系统的完美解决方案][Slf4j_Log4j2]

[log4j2]: https://blog.csdn.net/timchen525/article/details/77844534
[Log4j2_RollingFile]: https://www.cnblogs.com/yeyang/p/7944899.html
[http_logging.apache.org_log4j_2.x_manual_appenders.html_DeleteIfFileName]: http://logging.apache.org/log4j/2.x/manual/appenders.html#DeleteIfFileName
[log4j2_ -]: https://blog.csdn.net/autfish/article/details/51203709
[Slf4j_Log4j2]: https://www.cnblogs.com/hafiz/p/6160298.html