hibernate - get id after save object

Question

Because of an purpose  I need to get an id of an object  right after an insertion  I can work around with this code    session save Object o       insert to database  findByPorperty  o property      Return the inserted object along with the id   I think the above code is not sufficient because the session need to reopen to find the object  So    Is there a better way obtain the id  If there is  can I apply the same strategy to obtain a list of ids after inserting a bag of object

User · Answer

Let s say your primary key is an Integer and the object you save is  ticket   then you can get it like this  When you save the object  a Serializable id is always returned   Integer id    Integer session save ticket

User · Answer

By default  hibernate framework will immediately return id   when you are trying to save the entity using Save entity  method  There is no need to do it explicitly    In case your primary key is int you can use below code   int id  Integer  session save entity     In case of string use below code   String str  String session save entity

User · Answer

The session save object  returns the id of the object  or you could alternatively call the id getter method after performing a save   Save   return value   Serializable save Object object  throws HibernateException   Returns   the generated identifier   Getter method example   UserDetails entity    Entity public class UserDetails        Id      GeneratedValue     private int id      private String name          Constructor  Setters  amp  Getters     Logic to test the id s    Session session   HibernateUtil getSessionFactory   getCurrentSession    session getTransaction   begin    UserDetails user1   new UserDetails  user1    UserDetails user2   new UserDetails  user2       int userId    Integer  session save user1      if you want to save the id to some variable  System out println  before save   user id s     user1 getId             user2 getId      session save user1   session save user2    System out println  after save   user id s     user1 getId             user2 getId      session getTransaction   commit      Output of this code           before save   user id s   0   0  after save   user id s   1   2  As per this output  you can see that the id s were not set before we save the UserDetails entity  once you save the entities then Hibernate set s the id s for your objects - user1 and user2

User · Answer

or in a better way we can have like this  Let s say your primary key is an Integer and object you save is  ticket   then you can get it like this  When you save the object  id is always returned    unboxing will occur here so that id here will be value type not the reference type  Now you can check id for 0 in case of save failure  like below   int id    Integer  session save ticket    if id  0      your session save call was not success   else      your call to session save was successful

[hibernate] hibernate - get id after save object

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