springboot：SLF4J: Class path contains multiple SLF4J bindings.

电玩女神 2022-03-30 11:47 173阅读 0赞

SLF4J: Class path contains multiple SLF4J bindings.
    SLF4J: Found binding in [jar:file:/C:/Users/tony/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    SLF4J: Found binding in [jar:file:/C:/Users/tony/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
    SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
    SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
    12:02:26.963 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []
    12:02:26.969 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Excluded patterns for restart : [/spring-boot-actuator/target/classes/, /spring-boot-devtools/target/classes/, /spring-boot/target/classes/, /spring-boot-starter-[\w-]+/, /spring-boot-autoconfigure/target/classes/, /spring-boot-starter/target/classes/]
    12:02:26.969 [main] DEBUG org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs for reloading : [file:/F:/work_intel/code/demo1/target/classes/]
    Logging system failed to initialize using configuration from 'src/main/resources/log4j.properties'

在学习springboot过程中使用log4j2来作为项目的日志管理，引入相关文件后报jar包冲突，于是百度解决方法：springboot默认使用logback作为日志管理，解决办法是在springboot-start-web中排除logback，该法如下

<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>

我试了，就是不生效。在百度过程中看到一个方法通过ide工具查看jar包的依赖关系，于是乎通过eclipse工具来查看到底是哪个包依赖了spring-boot-starter-logging

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zNjkzMTMwOA_size_16_color_FFFFFF_t_70][]

最后发现是spring-boot-starter-cache依赖了logging，在pom.xml文件中做修改，解决报错了

<dependency>
    	<groupId>org.springframework.boot</groupId>
    	<artifactId>spring-boot-starter-cache</artifactId>
    		<exclusions>
    		     <exclusion>
    		         <groupId>org.springframework.boot</groupId>
    		         <artifactId>spring-boot-starter-logging</artifactId>
    		     </exclusion>
    		     <exclusion>
                     <groupId>org.slf4j</groupId>
                     <artifactId>slf4j-log4j12</artifactId>
                 </exclusion>
    		</exclusions>
    </dependency>

log4j2.xml文件在application.properties中配置下，log4j2就配置完成了

#log4j2日志
    logging.config=src/main/resources/static/log4j2.xml

src前面不加斜杠表示相对路径。

![20190105231925555.png][]

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[20190105231925555.png]: /images/20220330/470990d68e99416eb557f7bb56fa1a80.png