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Difference Between Hibernate Save And Persist Methods

Hibernate » On Sep 13, 2011 By Sivateja

Actually the difference between hibernate save() and persist() methods is depends on generator class we are using.

  • If our generator class is assigned, then there is no difference between save() and persist() methods. Because generator ‘assigned’ means, as  a programmer we need to give the primary key value to save in the database right [ Hope you know this generators concept ]
  • In case of other than assigned generator class, suppose if our generator class name is Increment means hibernate it self will assign the primary key id value into the database right [ other than assigned generator, hibernate only used to take care the primary key id value remember :-) ], so in this case if we call save() or persist() method then it will insert the record into the database normally

But here thing is,  save() method can return that primary key id value which is generated by hibernate and we can see it by

long s = session.save(k);

In this same case, persist() will never give any value back to the client, hope you are clear.

 








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Founder of Java4s.com. You can contact me at sivateja [at] java4s.com


Comments

12 Responses to “Difference Between Hibernate Save And Persist Methods”
  1. Mohammed Vaseem says:

    Hello java4s,
    Please provide the concepts of lazy loading and where it is used in real time applications.
    Thanks in advance.

  2. Java4s says:

    @Vaseem

    Sure,i do accept !
    Actually we ignored few topics, which are very important in the interview point of view.

    We noted this for an update, thank you.

  3. kand says:

    I just checked session.save() method is not returning any primary key.
    I think the difference lies with rest to transaction context.

  4. Java4s says:

    @kand

    Its depends on the generator we are using, it wont gives any return value back to assigned.

    - Comment edited (Reason : corrected)

  5. suresh says:

    Hello sir,
    what is difference between load() &get() in hibernate?

  6. Naga says:

    @suresh:
    load is the lazy function
    when doing emp e1 = session.load()… query doesnt happen .. it happen only when get the value ie. emp.getName();

    but in session.get().. query happens that time itself..

  7. Rohit Jain43 says:

    Hello Sir,

    Thanks for the info provided.
    If you perform save and persist for the same object at same time (one after the another) only one object is saved into the DB.

    For e.g. : Person p = new Person();
    p.setName(“dfdfd”);
    session.save(p);
    session.persist(p);

  8. Superb example I just danced with joy after reading the example. You have cleared the point. this example is direct hit to the target like bullet fired at correct target with sniper gun not like typical example stuffs that says bluh bluh bluh bluh bluh and bluh… and got just confused.

  9. swapna says:

    hibernate generators are clearly explained very nice article

  10. Rajesh says:

    super explaination sir……..

  11. srinivas says:

    By default hibernate follows lazy loading for example if u want to retrive the record from database server when u are call the sessin.query() creare the all the object for parent table only if u use lazy=”false” it will be create parent table objects and child class objects

  12. Another difference between persist() and save(). persist() is JPA compliance, while save() is hibernate only.

    Persist() will consider JPAs Cascade.PERSIST, while Save() do not.

    Persist() will complaint if the an entity with UUID generator is set for it, and you try to persist an instance with ID already set. Some detached object exception. While save() will return the ID without complaint.

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