Spring and ORM

Spring integrates several ORM at this time:

Hibernate
See the following link for more informations:
Spring reference documentation
Hibernate site

JDO
See the following link for informations about Spring and JPox ( a free JDO implementation ):
JPox 1.1 documentation
See the following link for informations about Spring and KODO ( another JDO implementation ):
Confluence

OJB
Javadocs:
Spring javadocs
Examples: see the PetClinic sample application in the Spring distribution!
Threads on the subject:
Spring adds support for ojb
Thread
Announce of support added

TopLink
See the following link for informations about Spring and TopLink:
Spring / TopLink on Oracle site

Spring offers now a perfect integration of tools for J2EE architecture to access datas of relationnal databases.