IntelliJ IDEA 12.1.0 Web Help
Some features described here are available in Ultimate edition only.
After you enable Web development support in a module, IntelliJ IDEA sets up the basic module structure as follows:
Creates a web folder with the index.jsp stub file.
By default, the web folder will be the root of your application after deployment
and the index.jsp file will be its home page.
Creates a WEB-INFO subfolder that contains the web.xml descriptor with an Action servlet configured.
Creates an src folder if you specified so when creating your project.