导入到Eclipse IDE后如何构建和运行Maven项目 [英] How to build and run Maven projects after importing into Eclipse IDE

问题描述

我正在学习使用Maven在Eclipse中构建Java项目。我从文件夹中的

maven-archetype-quickstart模板创建了一个Java项目 HelloWorld D：/ maven_projects 。然后转换Maven项目以支持Eclipse IDE，我导航到项目文件夹并发出命令：

mvn eclipse：eclipse 和 mvn package 。

然后我在Eclipse中导入了项目，并进行了必要的Eclipse配置，例如在Eclipse类路径中设置Maven本地存储库。现在在 D：/ EclipseWorkspace 文件夹中的项目。我在Eclipse打印helloworld中成功运行了该项目。

现在如果我想继续开发项目，为此，希望在 pom.xml中添加新的依赖关系在Eclipse中，那么当我运行项目时，新的jar不会添加到classpath中。

所以我的问题是在将Maven项目导入Eclipse后，如何在pom.xml中添加越来越多的依赖项，然后构建并运行项目？推荐和有效的方法是什么？

解决方案

我建议您不要使用m2eclipse命令行工具即 mvn eclipse：eclipse ），而是使用内置的Maven支持，称为 m2e 。

从Eclipse中删除项目，然后在项目中运行 mvn eclipse：clean m2eclipse项目数据。最后，使用Eclipse的现代版本，只需将Import>Maven>现有项目添加到工作空间...并选择您的pom.xml。

M2e将自动管理您的依赖关系并根据需要下载。它还通过新的Run as Maven build ...界面支持Maven构建。这很漂亮。

I am learning building a Java project in Eclipse using Maven. I created a Java project HelloWorld from
"maven-archetype-quickstart" template in a folder D:/maven_projects. Then to convert the Maven project to support Eclipse IDE, I navigated into the project folder and issued the commands:
mvn eclipse:eclipse and mvn package .

Then I imported the project in Eclipse and did the necessary Eclipse configurations like setting the Maven local repository in Eclipse classpath. Now the project in D:/EclipseWorkspace folder. I ran the project successfully in Eclipse printing "helloworld".

Now if I want to go on develop the project and for that reason want to add new dependencies in pom.xml in Eclipse, then the new jars are not added in classpath when I run the project.

So my question is after importing a Maven project into Eclipse how can I add more and more dependencies in pom.xml, then build and run the project? What is the recommended and efficient way to do this?

解决方案

I would recommend you don't use the m2eclipse command line tools (i.e. mvn eclipse:eclipse) and instead use the built-in Maven support, known as m2e.

Delete your project from Eclipse, then run mvn eclipse:clean on your project to remove the m2eclipse project data. Finally, with a modern version of Eclipse, just do "Import > Maven > Existing project into workspace..." and select your pom.xml.

M2e will automatically manage your dependencies and download them as required. It also supports Maven builds through a new "Run as Maven build..." interface. It's rather nifty.

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