save and saveOrUpdate

The main difference between save and saveOrUpdate method is that save() generates a new identifier and INSERT record into the database while saveOrUpdate can either INSERT or UPDATE based upon the existence of a record. Clearly, saveOrUpdate is more flexible in terms of use but it involves extra processing to find out whether a record already exists in the table or not.

Read more: https://javarevisited.blogspot.com/2012/09/difference-hibernate-save-vs-persist-and-saveOrUpdate.html#ixzz7LzbUYn2O

save and persist

• Difference – Return type

	save	persist
return type	Serializable	void

• Same – both needs flush to be effective in database

	save	persist	saveOrUpdate
flush	Serializable s = session.save(person); session.flush(); or transaction.commit();	session.persist(person); session.flush(); or transaction.commit();	session.saveOrUpdate(person); session.flush(); or transaction.commit();