<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate_xml</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">create</property>
        <property name="format_sql">true</property>

        <!-- mapping configurations -->

        <mapping resource="resources/Employee.hbm.xml" />
        <mapping resource="resources/Department.hbm.xml" />

    </session-factory>
</hibernate-configuration>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.domain.Employee" table="employee">
        <id name="id" type="long" column="id">
            <generator class="increment" />
        </id>
        <property name="firstName" name="firstName" />
        <property name="salary" name="salary" />

        <many-to-one name="department" class="com.domain.Department">
            <column name="department" />
        </many-to-one>
    </class>
</hibernate-mapping>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.domain.Department" table="department">
        <id name="id" type="long" column="id">
            <generator class="auto" />
        </id>
        <property name="deptName" column="deptName" />
    </class>
</hibernate-mapping>

public static SessionFactory getSessionFactory() {
        SessionFactory sessionFactory = null;
        try {
            sessionFactory = new Configuration().configure("resources/configuration.cfg.xml")
                    .addResource("resources/Employee.hbm.xml").addResource("resources/Department.hbm.xml")
                    .buildSessionFactory();
        } catch (Throwable ex) {
            throw new ExceptionInInitializerError(ex);
        }
        return sessionFactory;
    }