Maven jar包冲突的问题解决（亲测有效、实力证明）

男娘i 2022-02-15 02:13 491阅读 0赞

一、今天在Pom中添加了一个依赖，导致Jar包冲突。   
在启动项目的时候，会包jar包冲突的问题。下面以SpringBoot项目为例。   
我在Pom.xml文件中添加了一个依赖：

<dependency>  
            <groupId>org.ethereum</groupId>  
            <artifactId>ethereumj-core</artifactId>  
            <version>1.6.3-RELEASE</version>  
        </dependency>  
  
二、在启动项目的时候就会报一个错误

Connected to the target VM, address: '127.0.0.1:57577', transport: 'socket'  
SLF4J: Class path contains multiple SLF4J bindings.  
SLF4J: Found binding in \[jar:file:/Users/wangdong/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.7/log4j-slf4j-impl-2.7.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
SLF4J: Found binding in \[jar:file:/Users/wangdong/.m2/repository/ch/qos/logback/logback-classic/1.1.11/logback-classic-1.1.11.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
SLF4J: See http://www.slf4j.org/codes.html\#multiple\_bindings for an explanation.  
SLF4J: Actual binding is of type \[org.apache.logging.slf4j.Log4jLoggerFactory\]  
The Class-Path manifest attribute in /Users/wangdong/.m2/repository/com/sun/xml/bind/jaxb-core/2.3.0/jaxb-core-2.3.0.jar referenced one or more files that do not exist: file:/Users/wangdong/.m2/repository/com/sun/xml/bind/jaxb-core/2.3.0/jaxb-api.jar  
The Class-Path manifest attribute in /Users/wangdong/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-impl-2.3.0.jar referenced one or more files that do not exist: file:/Users/wangdong/.m2/repository/com/sun/xml/bind/jaxb-impl/2.3.0/jaxb-core.jar  
Exception in thread "restartedMain" java.lang.reflect.InvocationTargetException  
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)  
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
    at java.lang.reflect.Method.invoke(Method.java:498)  
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)  
Caused by: java.lang.IllegalArgumentException: LoggerFactory is not a Logback LoggerContext but Logback is on the classpath. Either remove Logback or the competing implementation (class org.apache.logging.slf4j.Log4jLoggerFactory loaded from file:/Users/wangdong/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.7/log4j-slf4j-impl-2.7.jar). If you are using WebLogic you will need to add 'org.slf4j' to prefer-application-packages in WEB-INF/weblogic.xml: org.apache.logging.slf4j.Log4jLoggerFactory  
    at org.springframework.util.Assert.instanceCheckFailed(Assert.java:389)  
    at org.springframework.util.Assert.isInstanceOf(Assert.java:327)  
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.getLoggerContext(LogbackLoggingSystem.java:274)  
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.beforeInitialize(LogbackLoggingSystem.java:98)  
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationStartingEvent(LoggingApplicationListener.java:230)  
    at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:209)  
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)  
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)  
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)  
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)  
    at org.springframework.boot.context.event.EventPublishingRunListener.starting(EventPublishingRunListener.java:69)  
    at org.springframework.boot.SpringApplicationRunListeners.starting(SpringApplicationRunListeners.java:48)  
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:292)  
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)  
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)  
    at com.gws.GwsWebApplication.main(GwsWebApplication.java:19)  
    ... 5 more  
Disconnected from the target VM, address: '127.0.0.1:57577', transport: 'socket'

Process finished with exit code 0  
  
三、仔细看一下这里面的报错   
关于日志的两个冲突了，我自己用的是log4j，结果还有一个slf4j

SLF4J: Class path contains multiple SLF4J bindings.  
SLF4J: Found binding in \[jar:file:/Users/wangdong/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.7/log4j-slf4j-impl-2.7.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
SLF4J: Found binding in \[jar:file:/Users/wangdong/.m2/repository/ch/qos/logback/logback-classic/1.1.11/logback-classic-1.1.11.jar!/org/slf4j/impl/StaticLoggerBinder.class\]  
  
四、定位一下冲突的这个slf4j在哪里。   
通过下面这个找：

/Users/wangdong/.m2/repository/ch/qos/logback/logback-classic/1.1.11/logback-classic-1.1.11.jar![è¿éåå¾çæè¿°][70]

五、下面看看红线框部分的jar包是不是刚刚引入的   
把刚刚引入Maven项注释掉，重新编译导下包。

![è¿éåå¾çæè¿°][70 1]  
六、发现第四部的那两个jar包消失了，那么就说明是刚刚添加的依赖产生了jar包冲突的问题了。

七、那么现在就开始来排除依赖

![è¿éåå¾çæè¿°][70 2]  
八、这个一定要放到对应的依赖里面   
groupId和artifactId一定要根据IDEA的提示写正确。

<exclusions>  
        <exclusion>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-classic</artifactId>  
        </exclusion>  
    </exclusions>  
  
九、写完后就会发现，冲突的包不见了，就解决啦

![è¿éåå¾çæè¿°][70 3]  
最后再启动项目，就会成功了。  
\---------------------   
作者：熊本同学   
来源：CSDN   
原文：https://blog.csdn.net/wd2014610/article/details/80268925   
版权声明：本文为博主原创文章，转载请附上博文链接！

[70]: /images/20220215/0ebe1eece8f74ba59a75b087467281d5.png
[70 1]: /images/20220215/71c100f693174eb7a1872b88f1f71be8.png
[70 2]: /images/20220215/1d87080043f44b27a383c765f529f579.png
[70 3]: /images/20220215/f0ff9166a8314cf997bff8ffe94584d0.png