How to create a GWT Library jar from existing GWT Project?

I have a working GWT project library which I include to other GWT projects that need to use it. So far its been useful enough, however I need to make it a library jar, what is the process of doing it?

I tried to export the jar usin开发者_StackOverflow社区g File->Export->JAR File process with Eclipse however when I included the jar file in the same projects where I used to include the project file, it won't work.

Any ideas?

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Make sure you package *.java along with *.class. Module gwt.xml should also be placed in correct package.

See an example here.

In eclipse export wizard, make sure "Export Java Source files and resources" checkbox is checked.