SpringBoot LoggerFactory is not a Logback LoggerContext but Logback is on the classpath。。。

水深无声 2022-05-11 08:16 161阅读 0赞

SpringBoot 在启动项目的时候一起错误：

> SLF4J: Class path contains multiple SLF4J bindings.  
> SLF4J: Found binding in \[jar:file:/Users/tongqinyuan/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
> SLF4J: Found binding in \[jar:file:/Users/tongqinyuan/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
> SLF4J: See http://www.slf4j.org/codes.html\#multiple\_bindings for an explanation.  
> SLF4J: Actual binding is of type \[org.slf4j.impl.Log4jLoggerFactory\]  
> Exception in thread "main" java.lang.IllegalArgumentException: LoggerFactory is not a Logback LoggerContext but Logback is on the classpath. Either remove Logback or the competing implementation (class org.slf4j.impl.Log4jLoggerFactory loaded from file:/Users/tongqinyuan/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-1.7.25.jar). If you are using WebLogic you will need to add 'org.slf4j' to prefer-application-packages in WEB-INF/weblogic.xml: org.slf4j.impl.Log4jLoggerFactory

其实这是slf4j 日志包冲出导致 ,怎么查看包冲突呢？

zookeeper包和junit包中都引入了日志包：

>     <dependency>
>         <groupId>org.apache.zookeeper</groupId>
>         <artifactId>zookeeper</artifactId>
>         <exclusions>
>             <exclusion>
>                 <artifactId>slf4j-log4j12</artifactId>
>                 <groupId>org.slf4j</groupId>
>             </exclusion>
>         </exclusions>
>     </dependency>

安装maven help 插件，在pom.xml文件下点击dependency Analyzer分析查看冲突的包

![70][]

![70 1][]

找到冲突后通过exclude排除掉就好了；

[70]: /images/20220511/a0f93e3be1fd40febef319c1d7dbe647.png
[70 1]: /images/20220511/5bf85d39775247e4bae22a2eff64aa51.png