How to connect to multiple databases in Hibernate

Question

I am new bee to Hibernate and trying out things. One thing that seems to amuse all is how to connect to different databases? I have two questions here:

1. If in t

Answer 1

It cannot be done using one hibernate configuration file. You need to have two configurations files for it.

To configure mysql database

hibernate-mysql.cfg.xml

To configure oracle database

hibernate-oracle.cfg.xml

In Details, mysql configuration file be like this.

    
        false
        com.mysql.jdbc.Driver
        PASSWORD
        jdbc:mysql://localhost:3306/UR_DB_NAME
        USERNAME
        org.hibernate.dialect.MySQLDialect
        true
        
    

In Details, oracle configuration file be like this.

    
        false
        oracle.jdbc.driver.OracleDriver
        PASSWORD
        jdbc:oracle:thin:UR DB NAME
        USERNAME
        org.hibernate.dialect.Oracle10gDialect
        true
        
    

And code should be like this.

mysql configuration

private static SessionFactory sessionAnnotationFactory; 

sessionAnnotationFactory = new Configuration().configure("hibernate-mysql.cfg.xml").buildSessionFactory();

Session session = sessionAnnotationFactory.openSession();

oracle sql configuration

sessionAnnotationFactory = new Configuration().configure("hibernate-oracle.cfg.xml").buildSessionFactory();

Session session = sessionAnnotationFactory.openSession()