Although we shouldn't care too much about IDE specific issues, I think this one deserves some attention.
While editing applicationContext.xml in IntelliJ IDEA Ultimate the following warning appears on line 10 and line 13.
Cannot resolve class 'Item'
Inspection info:Spring XML model validation
That only appears in Ultimate edition, but building and running the project should work just fine. Community does not complain, probably because it's missing the Spring plugin.
Providing the full class name seems to resolve the issue.