Hibernate configuration file

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As we discussed that hibernate works as an intermediate layer between java application and relational database. So hibernate needs some configuration setting related to the database and other parameters like mapping files. A hibernate configuration file contains all such information.

A hibernate configuration file mainly contains three types of information:

  1. Connection Properties related to the database.
  2. Hibernate Properties related to hibernate behaviour.
  3. Mapping files entries related to the mapping of a POJO class and a database table.

How to create a hibernate configuration file?

We can create a hibernate configuration file either by using java properties file known as hibernate.properties or by using an xml file known as hibernate.cfg.xml. The hibernate.cfg.xml file is used mostly.
Note: No. of hibernate configuration files in an application is dependence upon the no. of database uses. No. of hibernate configuration files are equals to the no. of database uses.

Syntax:

<hibernate-configuration>
 <session-factory>
 
  // Connection Properties
  <property name="connection.driver_class">driverClassName</property>
  <property name="connection.url">jdbcConnectionURL</property>
  <property name="connection.user">databaseUsername</property>
  <property name="connection.password">databasePassword</property>
 
  // Hibernate Properties
  <property name="show_sql">true/false</property>
  <property name="dialet">databaseDialetClass</property>
  <property name="hbm2ddl.auto">like create/update</property>
 
  // Mapping files entries
  <mapping resource="mappingFile1.xml" />
  <mapping resource="mappingFile2.xml" />
 
 </session-factory>
</hibernate-configuration>

 
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