[Hibernate]Select da DB

[aironeangelo77]

E' una classe che di solito ho sviluppato sempre io e l'ho sempre posizionata dove si trovano i pojo e gli xml di mapping.

La mia ad esempio fa così:

import java.io.File;
import org.hibernate.SessionFactory; 
import org.hibernate.cfg.Configuration; 
import org.hibernate.classic.Session; 

public class HibernateUtil {
    private static SessionFactory sessionFactory;

    public static Configuration getInitializedConfiguration() {
        return new Configuration().configure();
    }

    static {
        try{
            sessionFactory = new Configuration().configure().buildSessionFactory();
        }
        catch (Throwable ex){
            Logger.getLogger(HibernateUtil.class).warn("Initial SessionFactory creation failed.",new ExceptionInInitializerError(ex));
        }
    }
    
    public static SessionFactory getSessionFactory(){
        return sessionFactory;
    }

    public static Session getSession(){
        if (sessionFactory == null){
            Configuration config = HibernateUtil.getInitializedConfiguration();
            sessionFactory = config.buildSessionFactory();
        }
        Session hibernateSession = sessionFactory.getCurrentSession();
        return hibernateSession;
    }

    public static void closeSession(){
        HibernateUtil.getSession().close();
    }

    public static void flushSession(){
        HibernateUtil.getSession().flush();
    }

    public static Session beginTransaction(){
        Session hibernateSession;
        hibernateSession = HibernateUtil.getSession();
        hibernateSession.beginTransaction();
        return hibernateSession;
    }

    public static void commitTransaction() {
        HibernateUtil.getSession().getTransaction().commit();
    }

    public static void rollbackTransaction() {
        HibernateUtil.getSession().getTransaction().rollback();
    }
}