package dao; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.cfg.Configuration; /**  * @author minxuenetcn  */ public class HibernateSessionFactory {      private final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();      private Configuration configuration = new Configuration();       private org.hibernate.SessionFactory sessionFactory;      /**      * hibernate.cfg.xml      * @param configFile      */     public void setConfiguration(String configFile){      this.configuration=new Configuration();      configuration.configure(configFile);     }      /**      * Returns the ThreadLocal Session instance.      *  @return Session      *  @throws HibernateException      */      public Session getSession() throws HibernateException {          Session session = (Session) threadLocal.get();          if (session == null || !session.isOpen()) {              if (sessionFactory == null) {                  rebuildSessionFactory();              }              session = (sessionFactory != null) ? sessionFactory.openSession()                      : null;              threadLocal.set(session);          }          return session;      }      /**      *  Rebuild hibernate session factory      *      */      public void rebuildSessionFactory() {         try {              sessionFactory = this.configuration.buildSessionFactory();          } catch (Exception e) {              System.err                      .println("%%%% Error Creating SessionFactory %%%%");              e.printStackTrace();          }      }      /**      *  Close the single hibernate session instance.      *      *  @throws HibernateException      */      public void closeSession() throws HibernateException {          Session session = (Session) threadLocal.get();          threadLocal.set(null);          if (session != null) {              session.close();          }      }      /**      *  return session factory      *      */      public org.hibernate.SessionFactory getSessionFactory() {          return sessionFactory;      }      /**      *  return hibernate configuration      */      public Configuration getConfiguration() {          return configuration;      }  }