jlinks

Due to XStream's flexible architecture, handling of JSON mappings is as easy as handling of XML documents. All you have to do is to initialize XStream object with an appropriate driver and you are ready to serialize your objects to (and from) JSON... http://xstream.codehaus.org/json-tutorial.html

Spring JPA is part of the umbrella Spring Data project that makes it easy to easily implement JPA based repositories. Now available on O'Reilly's Open Feedback Publishing System is the book Spring Data: Modern Data Access for Enterprise Java which covers Spring Data JPA. Feedback is very much appreciated! http://www.springsource.org/spring-data/jpa