plz if anyone can help me locating

advantages and disadvantages of using hibernate with struts

If you are stating a new webapp project with Struts you maybe want to reconsider using Spring instead (or even in combination with Struts-Hibernate).

*As far as I know* Struts have no specific Hibernate support. They support in using datasources but nothing specific for Hibernate.

However Spring is offering specific Hibernate support.
You can use this in combination with Struts-Hibernate or even use Spring MVC instead of Struts. But this dependent on what you want and on the experience of the development team.

Hopes this helps a bit.

I'm having no problems using Struts w/ Hibernate. A DAO layer is nice, in which case the two don't necessarily interact with other directly. A typical request might go like so:
1. Create and validate your Struts ActionForm instance
2. Your Struts Action populates one of your persistance classes from the ActionForm by using BeanUtils.copyProperties (from commons-beanutils.jar).
3. The Struts Action hands off the persistance class to a DAO, which uses HQL, Criteria API, etc., to interact with Hibernate.
This is just an example, your architecture could be simpler or more complex.

Also, take a look at the Thread Local Session pattern http://www.hibernate.org/42.html, and the HibernateFilter http://www.hibernate.org/43.html to manage creating a Session for each request. Also, there is an example of a Struts plugin to handle creating a SessionFactory for the application on startup: http://www.hibernate.org/105.html