在运行时获取 Maven 工件版本 [英] Get Maven artifact version at runtime

问题描述

我注意到在 Maven 工件的 JAR 中，project.version 属性包含在两个文件中:

I have noticed that in a Maven artifact's JAR, the project.version attribute is included in two files:

META-INF/maven/${groupId}/${artifactId}/pom.properties
META-INF/maven/${groupId}/${artifactId}/pom.xml

有没有推荐的在运行时读取这个版本的方法?

Is there a recommended way to read this version at runtime?

推荐答案

您不需要访问特定于 Maven 的文件来获取任何给定库/类的版本信息.

You should not need to access Maven-specific files to get the version information of any given library/class.

您可以简单地使用 getClass().getPackage().getImplementationVersion() 来获取存储在 .jar 文件 MANIFEST.MF 中的版本信息.幸运的是 Maven 足够聪明 不幸的是，Maven 默认情况下也不会将正确的信息写入清单！

You can simply use getClass().getPackage().getImplementationVersion() to get the version information that is stored in a .jar-files MANIFEST.MF. Luckily Maven is smart enough Unfortunately Maven does not write the correct information to the manifest as well by default!

相反，必须修改 maven-jar-plugin 的 配置元素以设置 addDefaultImplementationEntries 和 addDefaultSpecificationEntries 到 true，像这样:

Instead one has to modify the <archive> configuration element of the maven-jar-plugin to set addDefaultImplementationEntries and addDefaultSpecificationEntries to true, like this:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <archive>                   
            <manifest>
                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
            </manifest>
        </archive>
    </configuration>
</plugin>

理想情况下，此配置应放入公司 pom 或其他 base-pom.

Ideally this configuration should be put into the company pom or another base-pom.

元素的详细文档可以在 Maven 存档文档.

Detailed documentation of the <archive> element can be found in the Maven Archive documentation.

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