Generic CRUD on Hibernate

Util to help manage CRUD on Hibernate

 package grekz.util; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.Transaction; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class ModelUtil { @SuppressWarnings("unchecked") public static T findById(Class c, int id) { Session session = (Session) HibernateUtil.getSessionfactory() .openSession(); T row = null; Transaction transaction = null; try { transaction = session.beginTransaction(); row = (T) session.get(c, id); transaction.commit(); } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); } finally { session.close(); } return row; } @SuppressWarnings("unchecked") public static T findById(Class c, String id) { Session session = HibernateUtil.getSessionfactory() .openSession(); T row = null; Transaction transaction = null; try { transaction = session.beginTransaction(); row = (T) session.get(c, id); transaction.commit(); } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); } finally { session.close(); } return row; } public static boolean saveMappedObject(T objToSave) { Session session = HibernateUtil.getSessionfactory() .openSession(); Transaction transaction = null; try { transaction = session.beginTransaction(); session.save(objToSave); transaction.commit(); return true; } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); } finally { session.close(); } return false; } public static boolean updateDetachedObject(T objToUpdate){ Session session = HibernateUtil.getSessionfactory() .openSession(); Transaction transaction = null; try { transaction = session.beginTransaction(); session.merge(objToUpdate); transaction.commit(); return true; } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); } finally { session.close(); } return false; } public static boolean deleteDetachedObject(T objToDelete){ Session session = HibernateUtil.getSessionfactory() .openSession(); Transaction transaction = null; try { transaction = session.beginTransaction(); session.delete(objToDelete); transaction.commit(); return true; } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); } finally { session.close(); } return false; } } public class HibernateUtil { private static final SessionFactory sessionFactory; static { try { Configuration config = new Configuration() .configure(); sessionFactory = config.buildSessionFactory(); } catch (Throwable t) { System.err.println("No se pudo crear"); throw new ExceptionInInitializerError(t); } } /** * @return the sessionfactory */ public static SessionFactory getSessionfactory() { return sessionFactory; } } 

Y una forma distinta más limpia aquí

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