Maven 依赖项在 WEB-INF/lib 中不可见 [英] Maven dependencies not visible in WEB-INF/lib

问题描述

我在使我的项目基于 Maven 时遇到了这个奇怪的问题.我在 Eclipse 中创建了一个新的 Maven 项目并启用了动态 Web 方面.但是在运行时它现在抛出 ClassNotFoundException 因为 Maven 依赖项没有复制到 WEB-INF/lib 目录.我什至尝试在 POM 中添加 copy-dependencies 部分，但没有帮助.

I'm having this weird problem making my project Maven-based. I created a new Maven project in Eclipse and enabled the Dynamic Web facets. But during runtime now it throws ClassNotFoundException because the Maven dependencies are not copied to WEB-INF/lib directory. I even tried adding the copy-dependencies section in POM, but it didn't help.

有人这里 似乎以正确的方式解决了这个问题，但我猜他忘了提解决方案::(

Someone here seemed to have solved this the right way, but I guess he forgot to mention the solution ::(

推荐答案

这应该与 eclipse 和 m2eclipse 无关，并且可以选择提供更好的支持 - m2e-wtp.此外，您不需要复制依赖项.以下是一些可能的原因:

This should have nothing to do with eclipse and m2eclipse, and optionally for better support - m2e-wtp. Also, you don't need copy-dependencies. Here are a few possible reasons:

• 您应该调用 mvn package(或右键单击 > maven > package)并获取一个 war 文件 - (在 pom 中)必须是战争
• 您的依赖项应具有默认范围(如果它们是 provided 或 test，它们将不会包含在存档中)
• 如果您在 eclipse 中的服务器上将项目作为动态 Web 项目运行，那么您应该打开项目属性(右键单击 > 属性)并选择部署程序集".单击添加"，选择构建路径条目"，然后选择maven 依赖项".这将指示 WTP 将 maven 依赖项发送到服务器目录.

• you should invoke mvn package (or right-click > maven > package) and obtain a war file - the <packaging> (in the pom) must be war
• your dependencies should be with the default scope (if they are provided or test they will not be included in the archive)
• if you are running the project as dynamic web project on a server within eclipse, then you should open the project properties (right click > properties) and select "Deployment Assembly". There click "add", select "build path entries", and choose "maven dependencies". This will instruct WTP to send the maven dependencies to the server dir.

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