What is SessionUtil class in Hibernate?

SessionUtil class :-

  • When there are some common method or logic is repeating multiple times, it is better to make this method to a util class.if this method is required then we can use this SessionUtil class.
  • SessionFactory is heavy weight class and it’s not singleton, so we should make one SessionFactory per database.
  • Using Util class we read the configuration file only once and we create one SesisonFactory.
  • we are get the session object from SessionFactory and after complete the work then close the session object.
					import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public final class SessionUtil {

	private final SessionFactory sessionFactory;
	private static SessionUtil instance;

	private SessionUtil() {
		Configuration configuration = new Configuration();

	StandardServiceRegistryBuilder serviceRegistry = new StandardServiceRegistryBuilder()
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
public synchronized static SessionUtil getInstance() {
		if (instance == null) {
			instance = new SessionUtil();
		return instance;
public static Session getSession() {
		return getInstance().sessionFactory.openSession();