How Hibernate came into existence?

=> Entity Beans of EJB technology were addressing almost all the limitations of direct usage of JDBC in data access layer.
=> Entity beans had two major limitations:
(1) Very bad performance
(2) Very complex to develope
=> Gavinn King developed Hibernate in 2001.
=> In 2003 Hibernate 2.x released.
=> In 2004 industry starts using Hibernate extensively.
=> Most of the Hibernate projects are using Hibernate 3.x.
=> Latest edition of Hibernate is 4.1.2.

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What is Hibernate ?

What is Hibernate ?
=> Hibernate is a java persistent framework.
=> Hibernate is a software product to be installed into a computer system in order to use it to build data access layer of Java enterprise application.
=> Hibernate follows ORM approach to build data access layer & performs CRUD operations.
=> Hibernate is one of the ORM implements.
=> Hibernate consist of the followings:
(1) Hibernate API
(2) Hibernate Engine
(3) HQL
(4) DTD (& Schema) for generating mapping files and Annotations to specify mapping.

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