RESTful Webservices are an essential and convenient part in current web applications when Information should be exchanged. Additionally the main exchange formats in current webservices are either JSON or XML.
So when we want to implement the serverside of a web application using Java and especially REST services, we might end up serializing and deserializing objects to and from XML and JSON. Honestly not a very desirable task. But fortunately there is the Jersey project which can help us in this task.