Criteria API in Hibernate and Hibernate Example 7

Criteria API in Hibernate

Till now we’ve two ways of saving and retrieving objects in hibernate

    

     1)      get(),save()

     2)      using HQL , query object

Both above approaches require knowledge of SQL , Criteria API in hibernate doesn’t require any prior knowledge of SQL

public class HibernateTestCritereiaAPI {

      public static void main(String[] args) {

           

          SessionFactory sessionFactory = new                                      Configuration().configure().buildSessionFactory();

            Session session = sessionFactory.openSession();

            session.beginTransaction();

           

           // Criteria is alike where condition in HQL/SQL

           Criteria criteria = session.createCriteria(Person.class);

           // Restrictions are where clauses and by default it acts as &

            criteria.add(Restrictions.eq("id",6L));

            List<Person> list = (List<Person>) criteria.list();

            for(Person p: list)

                  System.out.println(p.getName());

           

            session.getTransaction().commit();

            session.close();

      }

}

Output:

Hibernate: select this_.id as id0_0_, this_.name as name0_0_ from PERSON this_ where this_.id=?

Person 6