To those who are interested, I would like to share the following guide:

http://krams915.blogspot.com/2012/01/spring-mvc-31-jqgrid-and-spring-data_1887.html

This guide uses the following dependencies:

• Spring core 3.1.0.RELEASE
• Spring Data JPA 1.1.0.M1
• jQuery 1.6.4
• jQgrid 4.3.1
• It's a Maven project
• Source code is available at Github