Switched from Eclipse to IntelliJ for AppEngine development
- Install the latest Java SDK for AppEngine and set a symbolic link to it so it is easy to swap in newer versions as they are released.
- Don't import the eclipse project. Instead, I had better results creating new empty AppEngine projects and copying in my src directory and the contents of the old war directory to the web directory.
- Create an AppEngine facet, entering the symbolic link to your Java AppEngine SDK directory.
- Create an artifact of type Web App Exploded.