"Module name is invalid" when exporting an existing eclipse project to a war file

Question

I am trying to export an existing Eclipse project to a war file. But whatever I typed in the "WAR Export" dialog page, the system always returned "Module name is invalid". I do not know how to fix this issue. Thanks for the help.

Solution 1

I had the same issue, and I fixed it. Please follow the steps below, and you can create your war file.

1. Right-click on folder project.
2. Click on properties.
3. Go to project facets.
4. Activate, if necessary.
5. Scroll down to Configuration and mark Dynamic Web Module.

This works for me.

Solution 2

you must be sure your project is a Web Project, if it's not a Web Project check this link: http://eclipse.dzone.com/tips/converting-java-project-dynami

Solution 3

In Eclipse STS

1. Right-click on folder project.
2. Click on properties.
3. Go to project facets.
4. Choose your Java 1.8
5. Scroll down to Configuration and mark Dynamic Web Module.

After that, it works fine.

Solution 4

In my case error went off when the war file name matched the project name of the eclipse. Its easy to choose one from the drop down box.

Solution 5

Right-click on folder project. Click on properties. Go to project facets. Choose your Java 1.8 Scroll down to Configuration and mark Dynamic Web Module.

When I follow this step getting me the error (Dynamic Web Module 3.0 java 1.6 or newer)

I'm currently using Java 11

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