What is hybernate and spring?

Hibernate offers persistence and OR(Objet-Relational) mapping for Java/J2EE applications helping them improve performance and scalability.Spring is a light-weight Java framework which paves the way to write faster applications without App Server (or EJB etc.)There are a plenty of good books on these subjects. Following the most notable amongst them:Hibernate in Action by Christian Bauer, Gavin King (Hanning)Better, Faster, Lighter Java by Justin Gehtland, Bruce A. Tate ( O'Reilly)