使用hibernate + spring mvc获取自动生成的密钥，保存

Question

我正在使用 Spring MVC + Hibernate

@Resource(name = "sessionFactory")
private SessionFactory sessionFactory;

// save
public <T> int save(T entity) throws DataAccessException {
    Session session = sessionFactory.getCurrentSession();
    session.save(entity);

}

作为新记录保存，新的主键生成自动增量（db.MySQL）。我想获取并返回与上述方法相关的新的自动递增值。

更新我！

Answer 1

试试这个。这也适用于最新的 Hibernate（4.1 版）。

session.persist(object);
object.getId();

Answer 2

保存方法应该返回生成的 ID：

http://docs.jboss.org/hibernate/orm/3.5/api/org/hibernate/Session.html#save(java.lang.Object)

Answer 3

  //assumption: this method is adding a player into database and returns generated player id
    //Here player is object of class Player 
    public int addPlayer(Player player){
            int player_id;  //variable to store generated ID
            Session session = sessionFactory.openSession();
            session.beginTransaction();
            session.persist(player);  //adding player
            player_id=player.getplayer_id();  //getplayer_id is the getter method for the variable player_id
            session. getTransaction().commit();
            session.close();
            return player_id;
    }