Hibernate configuration file

Hibernate configuration file

This tutorial helps you in understanding the configuration file of Hibernate

Hibernate configuration file:

Hibernate configuration file ( hibernate.cfg.xml) is used for configuring your database and specify required hibernate properties.
It creates connection pool and set-up required environment. Mapping of your table is also mentioned in hibernate configuration file.

Here is your configuration file example ?

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/hibernate_examples</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">none</property>
<mapping class="net.roseindia.table.Employee" />
</session-factory>

</hibernate-configuration>

Description of hibernate.cfg.xml :

<hibernate-configuration> It is hibernate file-based configuration document. An instance of it contain
the property settings and references to mapping files
for a number of sessionFactory instances to be listed in JNDI.

Hibernate Properties :

hibernate.connection.driver ? It is JDBC driver class.

hibernate.connection.url ?the JDBC URL to the database instance.

hibernate.dialect- this is hibernate property. it generate the appropriate SQL
for the chosen database.

hibernate.connection.username- This hibernate property define the database
username.

hibernate.connection.password ? This hibernate property define the database
password.

hibernate.connection.pool_size ?It defines the number of connections waiting in
the Hibernate database connection pool.

hibernate.connection.autocommit ? This property allows autocommit mode to be used
for the JDBC connection.

hibernate.connection.datasource ? The JNDI name defined in the application server
Context you are using for the application.