<?xml version="1.0"?>
<!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">org.postgresql.Driver</property>
        <property name="connection.url">jdbc:postgresql://localhost:5432/mybase</property>
        <property name="connection.username">postgres</property>
        <property name="connection.password">123Qazws</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.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">update</property>

        <!-- Names the annotated entity class -->
        <mapping class="org.media.Actor"/>
        <mapping class="org.media.Video"/>
        <mapping class="org.media.Cast"/>

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

package org.media;

import javax.persistence.*;

@Entity
@Table(name= "video")
public class Video {

	@Id
	@Column(name= "id")
	@GeneratedValue(strategy = GenerationType.AUTO)
	private Long id;
	
	@Column(name= "description", length=64)
	private String description;
	
	public void setId(Long id){this.id = id;}
	public Long getId(){return id;}
	public void setDescription(String description) {
		this.description = description;
	}
	public String getDescription() {
		return description;
	}
}

package org.media;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.*;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class HibernateUtil {

    private static final SessionFactory sessionFactory;

    static {
        try {
        	
       	
        	ServiceRegistry serviceRegistry;
        	
            Configuration configuration = new Configuration();
            configuration.configure();
            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();        
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        	
            //sessionFactory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

package org.media;

import org.hibernate.Session;

public class MyMain {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
	/*	AnnotationConfiguration aconf = new AnnotationConfiguration()
	      .addAnnotatedClass(Video.class)
	      .addAnnotatedClass(Actor.class)
	      .addAnnotatedClass(Cast.class);
      Configuration conf = aconf.configure();*/
      
	  		
      Video video = new Video();
      video.setId(new Long(1));
      video.setDescription("First");
      
      Actor actor = new Actor();
      actor.setId(new Long(1));
      
      actor.setName("Firth");
      Cast cast = new Cast();
      cast.setVideo(video); 
      cast.setActor(actor);

      Session session = HibernateUtil.getSessionFactory().openSession();

      //Session session = conf.configure().buildSessionFactory(); //.getSessionFactory(); 
    		  //factory.openSession();
      session.beginTransaction();
      //session.saveOrUpdate(actor);
      session.saveOrUpdate(video);
      //session.saveOrUpdate(cast);
      session.getTransaction().commit();
      session.close();
      
	}

}