Cannot change version of project facet Dynamic Web Module to 3.0?

Question

I am using maven to create a dynamic webapp in Eclipse. I added some folders like src/test/java and src/test/resources. Also I changed the library in Java Build Path to obtain the JavaSE-1.7. It's all OK up to here.

When I tried to change the Projects Facet Dynamic Web Module something went wrong. I had change the Java to 1.7 in the same place. And it still told me, cannot change version of project facet Dynamic Web Module to 3.0.

I have changed everything that would effect the changing I think.

Answer 1

Another way is to edit the project facet configuration file itself: org.eclipse.wst.common.project.facet.core.xml

Change the dynamic web module version in this line to 3.0 - <installed facet="jst.web" version="2.5"/>

And then:

1. Right-click on the project (in the Project Explorer panel).
2. Select Maven » Update Project (or press Alt+F5)

You'll find this file in the .settings directory within the Eclipse project.

Answer 2

I updated my web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>Servlet 3.0 Web Application</display-name>
</web-app>

and then just Maven -> Update Project ...

Answer 3

I think I had the same problem as you. My web.xml had version 2.5 while the project had the (right-click on Project-> Properties-> Project Facets->) Dynamic Web Module 2.3.

Although I tried to change the version from 2.3 to 2.5 ECLIPSE did not permit it. Solution: I removed the check mark under the heading Dynamic Web Module, I saved and I had Update Project. Automatically re-awakening is entering the box with the correct version. I use Eclipse Kepler.

p.s.: look at the comments of Jonathan just below, very useful.

Answer 4

1. Click on your project folder.
2. Go to Window > Show View > Navigator
3. Go to Navigator and expand the .settings folder

4. Open org.eclipse.wst.common.project.facet.core.xml file

   <?xml version="1.0" encoding="UTF-8"?>
   <faceted-project>
     <fixed facet="wst.jsdt.web"/>
     <installed facet="jst.web" version="2.3"/>
     <installed facet="wst.jsdt.web" version="1.0"/>
     <installed facet="java" version="1.8"/>
   </faceted-project>
   

5. Change the version like this <installed facet="jst.web" version="3.1"/>

6. Save
7. Just update your project. Right Click on The Project Folder > Maven > Update Project > Select the Project and click 'Ok'

Just this worked to me.

Answer 5

I had the same issue and I even tried to remove the project and add it again. What did the trick was to remove the .settings directory.