Hi Tricia,
I would add to Johannes' answer those advantages of DAOs
(http://java.sun.com/blueprints/patterns/DAO.html) :
The Data Access Object (or DAO) pattern:
* separates a data resource's client interface from its data access
mechanisms
* adapts a specific data resource's access API to a generic client
interface
The DAO pattern allows data access mechanisms to change independently of
the code that uses the data.
Simply put, you can change your ORM API or change your DB without
changing the methods used by the client. Only the code of the DAOs will
be changed.
-Baptiste
Tricia Williams a écrit :
What is the advantage of using a DAO?
Tricia
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