maven 隐式依赖引起的包冲突解决办法

时间:2021-11-17 02:27:06

包冲突

1.使用maven管理项目时可能会遇到包冲突的情况比如:log4j-over-slf4j.jar 和 slf4j-log4j12.jar这两个包同时一起运行时就会有问题。

2.这种冲突可能是显式依赖导致,也可能是隐式依赖导致。

显式依赖,直接可以从pom.xml文件的<dependency>中看到两个冲突包的引用。

隐式依赖,在pom.xml的<dependency>无法看到冲突的包,而是由<dependency>引入的包间接引入的。

解决

先确认哪些依赖间接引入了包。使用mvn dependency:tree查看整个项目的依赖树,这里能看到所有的依赖,包括间接依赖。
结果类似如下:

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[INFO] +- junit:junit:jar:4.12:test
[INFO] | \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] +- org.apache.storm:storm-core:jar:1.0.2:provided
[INFO] | +- com.esotericsoftware:kryo:jar:3.0.3:compile
[INFO] | | \- com.esotericsoftware:minlog:jar:1.3.0:compile
[INFO] | +- org.clojure:clojure:jar:1.7.0:provided
[INFO] | +- com.lmax:disruptor:jar:3.3.2:provided
[INFO] | +- org.apache.logging.log4j:log4j-api:jar:2.1:provided
[INFO] | +- org.apache.logging.log4j:log4j-core:jar:2.1:provided
[INFO] | +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.1:provided
[INFO] | +- org.slf4j:log4j-over-slf4j:jar:1.6.6:provided
[INFO] | +- javax.servlet:servlet-api:jar:2.5:provided
[INFO] | \- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] +- com.aaa.khala:aaa-khala-insight-sdk-transfer-api:jar:1.0.0-SNAPSHOT:compile
[INFO] | \- com.aaa.khala:aaa-khala-common:jar:1.0.0-SNAPSHOT:compile
[INFO] |   +- javax.mail:javax.mail-api:jar:1.5.5:compile
[INFO] |   +- cglib:cglib:jar:2.2.2:compile
[INFO] |   +- org.aspectj:aspectjrt:jar:1.7.4:compile
[INFO] |   +- org.aspectj:aspectjweaver:jar:1.7.4:runtime
[INFO] |   +- org.javassist:javassist:jar:3.20.0-GA:compile
[INFO] |   +- log4j:log4j:jar:1.2.17:compile
[INFO] |   +- org.slf4j:slf4j-log4j12:jar:1.7.7:compile
[INFO] |   +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |   +- jaxen:jaxen:jar:1.1.6:compile
[INFO] |   +- commons-collections:commons-collections:jar:3.2.1:compile
[INFO] |   +- commons-codec:commons-codec:jar:1.9:compile
[INFO] |   +- commons-beanutils:commons-beanutils:jar:1.9.2:compile
[INFO] |   +- org.apache.commons:commons-compress:jar:1.6:compile
[INFO] |   | \- org.tukaani:xz:jar:1.4:compile

查到冲突包对应的依赖,在pom.xml的<dependency>中配置排除,就不会引入该包了,例如:

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<dependency>
  <groupId>com.aaa.khala</groupId>
  <artifactId>aaa-khala-insight-sdk-transfer-api</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <exclusions>
    <exclusion>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
    </exclusion>
  </exclusions>
</dependency

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原文链接:http://blog.csdn.net/wangyangzhizhou/article/details/52403359