Hi,

The main benefits of Object Relational Mapping tools of hibernate is that O/RM maps an object to the relational database table. Hibernate is also an O/RM and is available as open source project. To use Hibernate with Java you will be required to create a file with .hbm.xml extension into which the mapping information will be provided.

1. The SQL Code/ state,emt in application can be obviated without writing complex JDBC / Entity Bean code.
2. Distributed transaction can simply be performed by using ORM tools.
3. Hibernate is an open source ORM tool and a robust framework to perform Object Relational Mapping.
4. Without much of SQL knowledge, one can master Hibernate easily.

For more details visit this link: http://www.roseindia.net/hibernate/hibernate4/hibernateORMapping.shtml

Thanks,