解决Springboot中SLF4J和Log4j冲突问题

你的名字 2023-03-13 06:56 3阅读 0赞

错误信息：  
SLF4J: Class path contains multiple SLF4J bindings.  
SLF4J: Found binding in \[jar:file:/F:/Development%20Kit/apache/apache-maven-3.6.0/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
SLF4J: Found binding in \[jar:file:/F:/Development%20Kit/apache/apache-maven-3.6.0/repository/org/slf4j/slf4j-log4j12/1.7.30/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
SLF4J: See http://www.slf4j.org/codes.html\#multiple\_bindings for an explanation.  
SLF4J: Actual binding is of type \[ch.qos.logback.classic.util.ContextSelectorStaticBinder\]

问题描述：  
springboot2 默认集成了logback是slf4j的一种实现，和包含log4j的组件容易发生冲突，比如zookeeper。

解决方法：  
排除冲突的jar包，

第一种解决方法：在spring-boot-starter-web包中排除log4j

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

<dependency>  
    <groupId>org.springframework.cloud</groupId>  
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>  
      
    <exclusions>  
        <exclusion>  
            <groupId>org.apache.zookeeper</groupId>  
            <artifactId>zookeeper</artifactId>  
        </exclusion>  
  </exclusions>  
</dependency>

<dependency>  
    <groupId>org.apache.zookeeper</groupId>  
   <artifactId>zookeeper</artifactId>  
   <version>3.6.0</version>  
   <exclusions>  
        <exclusion>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-log4j12</artifactId>  
     </exclusion>  
    </exclusions>  
</dependency>

第二种解决方法：在spring-boot-starter-web包中排除logback

<dependency>  
    <groupId>org.springframework.boot</groupId>  
    <artifactId>spring-boot-starter-web</artifactId>  
    <exclusions>  
        <exclusion>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-classic</artifactId>  
        </exclusion>  
        <exclusion>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-core</artifactId>  
        </exclusion>  
    </exclusions>  
</dependency>