Maven在存储库中保留了较早版本的asm

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问题描述

最初，我在项目的pom.xml文件中具有3.2版asm的maven依赖关系.我使用以下依赖项将其更新到版本4.1

Initially, I had the maven dependency for asm version 3.2 in pom.xml file of my project. I update the same to version 4.1 using the following dependency

    <dependency>
        <groupId>org.ow2.asm</groupId>
        <artifactId>asm</artifactId>
        <version>4.1</version>
        <scope>compile</scope>
    </dependency>

但是现在我的项目在WEB-INF/lib中都有两个jar文件-asm 3.2和asm 4.1.我需要一些asm 4.1功能，但是由于两个jar都可用，因此使用了asm 3.2代码，因此无法使用asm 4.1功能.

but now my project has both jar files in WEB-INF/lib - asm 3.2 and asm 4.1. I need some features of asm 4.1 but due to both jars being available asm 3.2 code is used because of which I cannot use the asm 4.1 feature.

在此问题上的任何帮助都将受到赞赏.

Any help in this matter is appreciated.

推荐答案

asm 3.2的依赖项是:

The dependency for asm 3.2 is:

<dependency>
  <groupId>asm</groupId>
  <artifactId>asm</artifactId>
  <version>3.2</version>
</dependency>

请注意，组ID不匹配.可能发生的情况是您的另一个依赖项正在加载asm 3.2作为传递性依赖项.由于组ID的差异，Maven的依赖项解析过程无法确定4.1版本应该替代3.2版本，并且存在问题.

Note the group IDs do not match. What is likely happening is that another of your dependencies is loading asm 3.2 as a transitive dependency. Maven's dependency resolution process cannot determine that the 4.1 version is supposed to override the 3.2 version due to the group ID difference, and there is a problem.

您需要做的是取消3.2版本.首先通过运行mvn dependency:tree或使用Eclipse POM编辑器的依赖关系层次结构"选项卡，找出导致Maven将其引入的依赖关系.然后在您的POM中找到该依赖项并添加一个排除项:

What you need to do is eliminate the 3.2 version. First figure out which dependency is causing Maven to pull it in, by running mvn dependency:tree or using the Eclipse POM editor's dependency hierarchy tab. Then find that dependency in your POM and add an exclusion:

<dependency>
  <groupId>some.group.id</groupId>
  <artifactId>dependency-pulling-in-asm</artifactId>
  <version>1.0</version>
  <scope>compile</scope>
  <exclusions>
    <exclusion>
      <groupId>asm</groupId>
      <artifactId>asm</artifactId>
    </exclusion>
  </exclusions> 
</dependency>

Maven文档对此进行了解释

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