将Maven多模块项目导入Eclipse

Question

How do I properly import Maven multi-module project into Eclipse? When I import new Maven project and select the parent pom, I can see the submodules under the parent pom and they are visible in package explorer and project explorer. However, they are presented as deep directory structure, as if eclipse doesn't know they are Java projects.

When I expand the submodule project, I don't see the Java packages shortcuts as I would have opened a single Maven project. I only see it as a deep directory structure. How do I import multimodule Maven project and open the submodule project to take advantage of Eclipse Java project features?

Answer 1

• Install M2E Plugin from Market if it is not already installed
• From Eclipse IDE choose "File" and "Import" from toolbar. That should lead you to a pop up.
• Type "Existing Maven Project", or navigate to this voice under Maven settings.
• Then select main pom project from the import menu, and be sure to select entire tree of projects under it.

Before to approach this clean the IDE from current wrong imported project deleting its maven root pom project and every sub modules, but leave them in the disk obviously. I don't recommend the "Convert" options as sometimes doesn't lead to clean results, especially with big and messy projects. That should do the trick. Let me know if this solves your problem.

Answer 2

For everyone who still have the same issue, follow these steps:

1. Open Import Existing Maven Project wizard
2. Select the Parent POM.xml only and click Finish
3. Foreach child project, Right Click on the project folder, then click on Import and select his POM.xml file

Hope it helps ! Good Luck !

Answer 3

If you are using git or any version control. Clone the repository first in local.

Steps already explain by @Black Jack. Adding image to support

Answer 4

Step 1

• Navigate to project folder.
• Open command prompt (or shell)
• Run mvn eclipse:eclipse

Step 2

• Open eclipse IDE
• Open project from File > Open Projects From File System...
• Select folder of project containing parent pom.xml file

Step 3

• Run Project > Clean from Menu

Step 4

• Run File> Restrat From Menu

Solved my problem in Eclipse 2019-06(4.12.0) and 2018-12(4.10.0)

Important trick

When you start to search for files in 'open resource' (for example using Ctrl + Shift + R ) eclipse will show file from two address. for example MySampleFile will be available under:

• parent-module/sub-module/src/main/java/.../MySampleFile and
• sub-module/src/main/java/.../MySampleFile

Use second one . Opening file with first one will not activate IDE features on that file.

Answer 5

First, import the parent project. Then, right click on it at the package/project explorer, go to Configure and then click the Configure and Detected Nested Projects... , on the window that will appear click Finish and you're gold.

Also worth mentioning, Package Explorer won't show it nested, use Project Explorer instead.

Have a nice day.

Answer 6

To add a few on top of Black Jack's answer, ensure that the parent pom in the root of the directory that contains sub-projects, contains a modules section:

<modules>
    <module>module1</module>
    <module>module2</module>
    <module>module3</module>
</modules>

So, after the import, unline IntelliJ, Eclipse opens the sub-modules as separate projects, apart from the main root project.

Hope this helps!

Answer 7

Follow the steps

1. Choose file menu
2. Click on import
3. Select project right click then Convert --> Convert to maven project
4. Click on import then type or select Existing Maven Project

Now your moduled project in you workbench. If you have any query we can discuss.