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在Spring boot中切换日志

程序员文章站 2022-03-10 10:21:19
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Spring boot的默认日志是slf4j+logback。Spring boot日志的底层依赖:
在Spring boot中切换日志

一、slf4j+logback——>slf4j+log4j(不推荐的切换)

  如果我们想要在spring boot中使用slf4j+log4j,需要去除log4j-to-slf4j和logback-classic,然后导入slf4j-log4j12

  <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>logback-classic</artifactId>
                    <groupId>ch.qos.logback</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j-to-slf4j</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </dependency>
</dependencies>

log4j配置文件(log4j.properties):

#USE THIS SETTING FOR OUTPUT MYBATIS`s SQL ON THE CONSOLE
log4j.rootLogger=DEBUG, Console

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d ===> [%t] ===> %-5p [%c] - ===>%m%n

log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

二、slf4j+logback——>slf4j+log4j2

  Spring boot默认使用spring-boot-starter-logging,若要切换到log4j2日志框架,需要先排除spring-boot-starter-logging,再导入spring‐boot‐starter‐log4j2的依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions> 
                 <exclusion> 
                       <artifactId>spring‐boot‐starter‐logging</artifactId>
                       <groupId>org.springframework.boot</groupId>
                 </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring‐boot‐starter‐log4j2</artifactId>
        </dependency>

log4j2的配置文件详情:

引用自:https://www.cnblogs.com/new-life/p/9246143.html

<?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 -->
 <!--Configuration后面的status,这个用于设置log4j2自身内部的信息输出,可以不设置,当设置成trace时,你会看到log4j2内部各种详细输出-->
 <!--monitorInterval:Log4j能够自动检测修改配置 文件和重新配置本身,设置间隔秒数-->
 <configuration status="WARN" monitorInterval="30">
     <!--先定义所有的appender-->
     <appenders>
     <!--这个输出控制台的配置-->
         <console name="Console" target="SYSTEM_OUT">
         <!--输出日志的格式-->
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
         </console>
     <!--文件会打印出所有信息,这个log每次运行程序会自动清空,由append属性决定,这个也挺有用的,适合临时测试用-->
     <File name="log" fileName="log/test.log" append="false">
        <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
     </File>
     <!-- 这个会打印出所有的info及以下级别的信息,每次大小超过size,则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档-->
         <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
             <!--控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch)-->        
             <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         </RollingFile>
         <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/warn.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
             <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         <!-- DefaultRolloverStrategy属性如不设置,则默认为最多同一文件夹下7个文件,这里设置了20 -->
             <DefaultRolloverStrategy max="20"/>
         </RollingFile>
         <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/error.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
             <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         </RollingFile>
     </appenders>
     <!--然后定义logger,只有定义了logger并引入的appender,appender才会生效-->
     <loggers>
         <!--过滤掉spring和mybatis的一些无用的DEBUG信息-->
         <logger name="org.springframework" level="INFO"></logger>
         <logger name="org.mybatis" level="INFO"></logger>
         <root level="all">
             <appender-ref ref="Console"/>
             <appender-ref ref="RollingFileInfo"/>
             <appender-ref ref="RollingFileWarn"/>
             <appender-ref ref="RollingFileError"/>
         </root>
     </loggers>
 </configuration>
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