<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration SYSTEM "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/hibernatedb</property>
    <property name="connection.username">postgres</property>
    <property name="connection.password">password</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>

    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</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">create</property>
    <mapping class="org.javabrains.koushik.dto.UserDetails" />
    <!--    <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml"/> -->
  </session-factory>
</hibernate-configuration>

package org.javabrains.koushik.dto;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class UserDetails {

@Id
private int userID;
private String userName;

public int getUserID() {
    return userID;
}
public void setUserID(int userID) {
    this.userID = userID;
}
public String getUserName() {
    return userName;
}
public void setUserName(String userName) {
    this.userName = userName;
}





}

package org.koushik.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

import org.javabrains.koushik.dto.UserDetails;

public class HibernateTest {

    public static void main(String[] args) {


        UserDetails user = new UserDetails();
        user.setUserID(1);
        user.setUserName("First user");

        SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
        Session session =sessionFactory.openSession();
        session.beginTransaction();
        session.save(user);
        session.getTransaction().commit();

    }


}