RESTful error handling with Tomcat and SpringMVC 3.x

Handling errors in a REST way is seemingly simple enough: upon requesting a resource, when an error occurs, a proper status code and a body that contains a parseable message and using the content-type of the request should be returned.
The default error pages in Tomcat are ugly. Not only they expose too much of the server internals, they are only HTML formatted and making them a poor choice if a RESTful web service is deployed in that Tomcat container. Substituting them to simple static pages is still no enough since I want a dynamic response containing error information.

Here’s how to do it in 3 simple steps:

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