Maven 是否可以收集项目的所有依赖 JAR 以帮助部署应用程序? [英] Can Maven collect all the dependent JARs for a project to help with application deployment?

问题描述

我刚刚开始使用 Maven，(真的在评估它)，我需要能够为我的应用程序快速生成一个 JAR 文件和一个包含所有依赖项的目录(对于例如，lib) 以便我可以部署这两个以独立方式运行.使用正确的清单生成 JAR 文件很容易，但我不知道如何让 Maven 将当前项目的依赖项复制到我可以部署的 lib 目录中.

I'm just starting to use Maven, (evaluating it, really) and I need to be able to quickly generate a JAR file for my application and a directory with all the dependencies (for example, lib) so that I can deploy those two to be run in a stand-alone manner. Generating the JAR file with the proper manifest is easy, but I do not know how to get Maven to copy the dependencies for the current project into a lib directory that I can deploy.

由于这是一个独立的 Java 应用程序，我对部署到 Maven 存储库不感兴趣，这也相当简单，或者至少很容易在谷歌上搜索.

Since this is for a stand-alone Java applications, I am not interested in deploying to a Maven repository, that is also fairly trivial, or at least easily googleable.

我已经找到了如何做所有事情除了将依赖的 JAR 文件复制到某个指定的目录中.这是我正在寻找的工作流程:

I've found out how to do everything except copy the dependent JAR files into some specified directory. This is the workflow I'm looking for:

$ mvn clean
$ mvn package
$ cp -r target/{lib,myApp.jar} installLocation

然后，从 installLocation 运行 myApp.jar 作为 JAR 文件应该正常工作"，而不管我的 $CLASSPATH.

Then, running myApp.jar from installLocation as a JAR file should "just work" regardless of my $CLASSPATH.

尝试抢占一些答案:

• 我确实有一个 Main-class: 集，它运行良好.
• 我还在 MANIFEST.MF 中设置了类路径，这也很好用.
• 我已经找到了如何使用 和 来完成这项工作——但仅限于我的机器.(通过:${settings.localRepository})

• I do have a Main-class: set, and it works fine.
• I've also set the classpath in the MANIFEST.MF, and that works fine too.
• I've found out how to use <classpathPrefix> and <classpathMavenRepositoryLayout> to make this work -- but only on my machine. (via: <classpathPrefix>${settings.localRepository}</classpathPrefix>)

推荐答案

你要调查的是 Maven 的依赖插件.在 pom.xml 中添加类似于以下内容:

What you want to investigate is Maven's dependency plugin. Add something similar to the following to pom.xml:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <configuration>
        <outputDirectory>
            ${project.build.directory}
        </outputDirectory>
    </configuration>
</plugin>

然后运行 ​​mvn clean dependency:copy-dependencies 来复制执行复制.将此与 assembly plugin 结合起来，您就可以将所有内容打包成一个独立的存档以供分发.

Then run mvn clean dependency:copy-dependencies to copy perform the copy. Combine this with the assembly plugin and you can package everything into a self contained archive for distribution.

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