springboot中如何整合log4g2

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1.导入jar

springboot默认是用logback的日志框架的，所以需要排除logback，不然会出现jar依赖冲突的报错。

 <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>            <exclusions><!-- 去掉springboot默认配置 -->                <exclusion>                    <groupId>org.springframework.boot</groupId>                    <artifactId>spring-boot-starter-logging</artifactId>                </exclusion>            </exclusions>        </dependency>        <dependency> <!-- 引入log4j2依赖 -->            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-log4j2</artifactId>        </dependency>

2.配置文件

如果自定义了文件名，需要在application.yml中配置

默认名log4j2-spring.xml，就省下了在application.yml中配置
在applicaiton.yaml中添加配置

logging:  #日志文件  config: classpath:log4g2.xml  level:    com.alibaba.nacos.client.config.impl: WARN    cn.jay.repository: trace  file:    #${file.name} 后期可以改成${spring.application.name}    path: /log/${file.name}file:  name: dome

在config中配置log4g2.xml文件

<?xml version="1.0" encoding="UTF-8"?><!-- status="OFF"，可以去掉，它的含义为是否记录log4j2本身的event信息，默认是OFF --><configuration status="off" monitorInterval="60">    <!--<properties>-->    <!--<property name="projectName">-->    <!--riiot-->    <!--</property>-->    <!--</properties>-->    <appenders>        <!-- 开发环境用 -->        <Console name="debug_console" target="SYSTEM_OUT">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n"/>            <Filters>                <ThresholdFilter level="DEBUG"/>                <ThresholdFilter level="INFO" onMatch="DENY" onMismatch="NEUTRAL"/>            </Filters>        </Console>        <Console name="console" target="SYSTEM_OUT">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n"/>            <Filters>                <ThresholdFilter level="info"/>            </Filters>        </Console>        <!-- 输出日志到文件 每天一个文件（ERROR-FATAL级别） -->        <RollingRandomAccessFile name="AppErrorDailyRollingFile" fileName="${sys:LOG_PATH}/AppError.log" append="true" bufferedIO="false" bufferSize="256"                                 filePattern="${sys:LOG_PATH}/AppError.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="ERROR"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 输出日志到文件 每天一个文件（WARN级别） -->        <RollingRandomAccessFile name="AppWarnDailyRollingFile" fileName="${sys:LOG_PATH}/AppWarn.log" append="true" bufferedIO="true" bufferSize="10240" immediateFlush="false"                                 filePattern="${sys:LOG_PATH}/AppWarn.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="WARN"/>                <ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 输出日志到文件 每天一个文件（INFO级别） -->        <RollingRandomAccessFile name="AppInfoDailyRollingFile" fileName="${sys:LOG_PATH}/AppAccess.log" append="true" bufferedIO="true" bufferSize="409600" immediateFlush="false"                                 filePattern="${sys:LOG_PATH}/AppAccess.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="INFO"/>                <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 输出日志到文件 每天一个文件（INFO级别） -->        <RollingRandomAccessFile name="DBAccessDailyRollingFile" fileName="${sys:LOG_PATH}/DBAccess.log" append="true" bufferedIO="true" bufferSize="409600" immediateFlush="false"                                 filePattern="${sys:LOG_PATH}/DBAccess.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="INFO"/>                <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 输出日志到文件 每天一个文件（ERROR级别） -->        <RollingRandomAccessFile name="DBErrorDailyRollingFile" fileName="${sys:LOG_PATH}/DBError.log" append="true" bufferedIO="false" bufferSize="256"                                 filePattern="${sys:LOG_PATH}/DBError.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="WARN"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 输出日志到文件 每天一个文件（ERROR级别） -->        <RollingRandomAccessFile name="SysErrorDailyRollingFile" fileName="${sys:LOG_PATH}/SysError.log" append="true" bufferedIO="false"                                 filePattern="${sys:LOG_PATH}/SysError.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="WARN"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>        <!-- 启动日志 -->        <RollingRandomAccessFile name="BootLog" fileName="${sys:LOG_PATH}/Boot.log" append="false" bufferedIO="false"                                 filePattern="${sys:LOG_PATH}/Boot.log.%d{yyyy-MM-dd}.log">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [%t] {%c}-%m%n" />            <Filters>                <ThresholdFilter level="INFO"/>            </Filters>            <Policies>                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>            </Policies>        </RollingRandomAccessFile>     <!--   <Kafka name="SyncKafka" topic="logs" syncSend="false">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [riiot] [${jar.name}] [%X{ip}] [dev] [%t] {%c}-%m"/>            <Property name="bootstrap.servers">192.168.1.49:9092</Property>            <Property name="acks">0</Property>            <Property name="compression.type">gzip</Property>            <Property name="max.block.ms">10000</Property>            <Filters>                <ThresholdFilter level="INFO"/>            </Filters>        </Kafka>        &lt;!&ndash; 异步发送kafka &ndash;&gt;        <Async name="Kafka" bufferSize="512" blocking="false">            <AppenderRef ref="SyncKafka"/>        </Async>        <Kafka name="KafkaErrLog" topic="errLogTopic" syncSend="false">            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p] [%traceId] [riiot] [${jar.name}] [%X{ip}] [dev] [%t] {%c}-%m"/>            <Property name="bootstrap.servers">192.168.1.49:9092</Property>            <Property name="acks">0</Property>            <Property name="compression.type">gzip</Property>            <Filters>                <ThresholdFilter level="ERROR"/>            </Filters>        </Kafka>        &lt;!&ndash; 异步发送kafka &ndash;&gt;        <Async name="AsyncKafkaErrLog" bufferSize="512" blocking="false">            <AppenderRef ref="KafkaErrLog"/>        </Async>-->    </appenders>    <loggers>        <!-- 只把包名是com.cmsr的日志输出到文件 -->        <logger name="com.cmsr" additivity="false" level="debug">            <appender-ref ref="AppErrorDailyRollingFile" />            <appender-ref ref="AppWarnDailyRollingFile" />            <appender-ref ref="AppInfoDailyRollingFile" />            <appender-ref ref="console" />            <appender-ref ref="debug_console" />        </logger>        <!-- 只把包名是com.cmsr.sicp.common.mybatis(DB正常执行，异常分别写到不同的log文件)的日志输出到文件 -->        <logger name="com.cmsr.sicp.common.mybatis" additivity="false" level="debug">            <appender-ref ref="DBAccessDailyRollingFile" />            <appender-ref ref="DBErrorDailyRollingFile" />            <appender-ref ref="console" />        </logger>        <!-- 过滤springframework输出，提高启动速度 (生产环境中需要整体删除)-->        <logger name="org.springframework" additivity="false" level="warn">            <appender-ref ref="console" />        </logger>        <!-- 启动日志单独输出 -->        <logger name="com.cmsr.Launcher" additivity="false" level="info">            <appender-ref ref="BootLog" />            <appender-ref ref="console" />        </logger>        <!-- 定义全局。其他包的日志只输出到控制台，不输出到日志文件 -->        <root level="error">            <appender-ref ref="SysErrorDailyRollingFile" />            <appender-ref ref="console" />        </root>    </loggers></configuration>

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