<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
  <class name="hibernate.Employee" table="employee">
   <id name="id" column="id" >
  </id>

  <map name="address" >
     <key column ="id" />
     <index column = "property_name" type= "string" />
   <element column = "property_value" type= "string" />
  </map>
 
  <property name = "name" type = "string" />
</class>
</hibernate-mapping>

package hibernate;

import java.util.HashMap;
import java.util.Map;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class EmployeeAddress {
   public static void main(String[] args) {
       Session session = null;
       Transaction tx = null;
       try{
          SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
          session =sessionFactory.openSession();
          tx = session.beginTransaction();
          Employee employee = new Employee();
          
          employee.setName("bob");
          employee.setId(1);
          Map address = new HashMap();
          address.put("street" , "M.G Road");
          address.put("city" , "bangalore");
          address.put("pin" , "560018");
          employee.setAddress(address);
          
          session.save(employee);
          
       }
       catch(NumberFormatException e){
          e.printStackTrace();
       }catch(HibernateException e){
          e.printStackTrace();
       }
       catch(Exception e){
          e.printStackTrace();
       }finally{
          session.flush();
          session.close();
          System.exit(0);
       }
   }
}

<?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>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:bob</property>
        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.username">scott</property>
        <property name="hibernate.connection.password">tiger</property>
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
      <property name="show_sql">true</property>
      <property name="hibernate.hbm2ddl.auto">update</property>

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

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

package hibernate;

import java.util.Map;
// Demonstration of Collection Mapping using Maps

public class Employee {

   private int id;
   private String name;
   private Map address;
   
   public Map getAddress() {
      return address;
   }
   public void setAddress(Map address) {
      this.address = address;
   }
   public int getId() {
      return id;
   }
   public void setId(int id) {
      this.id = id;
   }
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }

}