First Hibernate Application

First let us know, what are the important interfaces ans classes. The following are the most important interfaces and classes. 

Fig: Important interfaces and classes in Hibernate

The following are the steps which will be used to develop Hibernate Application:

• Create Configuration object by using configuration class.
• Call the configure() method using the above configuration object.
• Get SessionFactory object by using configuration object by using "buildSessionFactory()" method.
• Get Session object using SessionFactory object, by calling openSession() method. 
• Get Transaction object by calling the method beginTransaction().
• Create the POJO class object corresponding to the table.
• Store the data in the form of object.
• Ask Hibernate to perform CURD operations.The following are the curd operations. The following are the operations.

1. save()        // create  
2. update()   //  update
3. load()       //  select /Retrieve
4. delete()   //  delete

• End the Transaction by calling commit() and rollback().
• Close the session object.
• Close the SessionFactory object.

Now let us develop the first Hibernate application, let us insert a record into the emp table. The following program inserts the record into emp table.

Fig: Hibernate application to Insert Record into Employee table