Hibernate mapping file

Hibernate mapping file is used by hibernate framework to get the information about the mapping of a POJO class and a database table.

It mainly contains the following mapping information:

1. 1. Mapping information of a POJO class name to a database table name.
2. 2. Mapping information of POJO class properties to database table columns.

Elements of the Hibernate mapping file:

1. 1. hibernate-mapping: It is the root element.
2. 2. Class: It defines the mapping of a POJO class to a database table.
3. 3. Id: It defines the unique key attribute or primary key of the table.
4. 4. generator: It is the sub element of the id element. It is used to automatically generate the id.
5. 5. property: It is used to define the mapping of a POJO class property to database table column.

Syntax:

<hibernate-mapping>   <class name="POJO class name" table="table name in database"> <id name="propertyName" column="columnName" type="propertyType" > <generator class="generatorClass"/> </id> <property name="propertyName1" column="colName1" type="propertyType " /> <property name="propertyName2" column="colName2" type="propertyType " /> …. </class>   </hibernate-mapping>