Currently we are using Hibernate 2. We have a plan to upgrade to Hibernate 3. What are the new features in Hibernate 3.0 than Hibernate 2.0 ? Is it easy to migrate from Hibernate 2.0 to Hibernate 3.0 ?
Migration is pretty simple, just some package names to change, one or two other things, but the link given above shows them all. But the stuff written in 2.0 will work in 3.0, So you can gradually change to say mapping xml files to Annotations.