问题描述

依赖中有 log4j-slf4j-impl-2.10.0.jar 和 slf4j-log4j12-1.6.1.jar 时，会报错，如下：

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/D:/devtools/maven/mvnRespo/org/apache/logging/log4j/log4j-slf4j-impl/2.10.0/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/D:/devtools/maven/mvnRespo/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.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.apache.logging.slf4j.Log4jLoggerFactory]

原因是这2个包都有 org.slf4j.impl.StaticLoggerBinder.class 类，导致冲突

解决

在依赖中添加 <exclusions> 解决依赖冲突

<dependency>
    <groupId>org.apache.hive</groupId>
    <artifactId>hive-jdbc</artifactId>
    <version>3.1.2</version>

    <!-- log4j-slf4j-impl-2.10.0.jar 与 slf4j-log4j12-1.6.1.jar 冲突，都有 org.slf4j.impl.StaticLoggerBinder.class 文件 -->
    <exclusions>
        <exclusion>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
        </exclusion>
    </exclusions>
</dependency>

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