I'm currently working on a web application that get/store information in a DB2 database.
Every CRUD is done manually through DB views (substitution of select for update, insert, etc.. by triggers through the "INSTEAD OF " sql command) and SQL queries
My question is (and I didn't find anything in the doc ) : is it possible to map POJOs to these views with Hibernate, instead of mapping them directly to tables ?

If you are heavy on using SQL and DB features than iBatis might be a better fit in your situation.
http://ibatis.apache.org/