Connect database(Mysql) using Ejb3.0

Question

Hi All,
Can any one give me an step by step procedure for entity beans it refers the mysql database's student table
thanks & regards,
Maheshwaran Devaraj

Answer 1

There's more that code involved. First off you need an implementation of the JPA (Java persistence API). Probably hibernate or toplink. The appropriate libraries have to go into your project (most of them can be runtime only but you need a library defining the JPA interfaces.).
You need a resource file called persistence.xml in the META-INF directory of your class tree or jar. That defines things like the database connection details, a list of entity classes and a set of options.
If you use an up to date IDE it will probably do most of this for you. Once it's set up you get an EntityManagerFactory instance and, from that, you get an EntityManager for each session from which you search for and otherwise manipulate entities. Generally you don't have to write any actual SQL, though you will probably have to write queries in a modified language called JPQL (Java Persistence Query Language).