hibernate session.save() does not reflect in database

Question

According to my understanding in hibernate (please confirm)

1- You have to session.close() if you get it by getSessionFactory().openSession()

Answer 1

Whenever Your are doing save(), Always commit the transaction once done.

Account ac =new account()
ac.insert(123);
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session.save(ac);

// Add this bottom line  
session.getTransaction().commit();