将外部库添加到 IntelliJ IDEA 中的工件 jar

问题描述

如何向 IntelliJ IDEA 中的项目添加外部库，以便在构建工件时它仍然可以访问库中的类?

我从项目结构创建了一个新的 Jar 工件，然后将外部 JAR 添加到库中，然后在模块列表中检查它，最后将其添加到工件的输出中.这些都不起作用.当我构建并尝试运行我的应用程序时，它抛出一个错误:

线程main"中的异常java.lang.NoClassDefFoundError:

我错过了什么，还是我做错了?

解决方案

这里有 2 个选项:

• 将依赖项提取到工件 jar 中，以便应用程序是具有所有依赖项的单个可执行 jar
• 通过 Manifest.MF 链接依赖的 jar 并将它们复制到应用程序主 jar 附近

我准备了一个示例项目来演示这两种方法:

How can I add an external library to a project in IntelliJ IDEA so that when I build an artifact it still has access to the classes in the library?

I have created a new Jar artifact from Project Structure, then added the external JAR to the Libraries, then checked it in the Modules List, and finally added it to the Output for the Artifact. None of these work. When I build and try running my application, it throws an error:

Exception in thread "main" java.lang.NoClassDefFoundError: <path of the class trying to use>

What am I missing, or am I doing this completely wrong?

解决方案

You have 2 options here:

• extract the dependency into the artifact jar so that the app is the single executable jar with all the dependencies
• link the dependent jars via the Manifest.MF and copy them near the application main jar

I've prepared a sample project that demonstrates both approaches: HelloWithDependencies.zip.

The artifacts are produced into outsingle and outlinked directories.

Relevant configurations:

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