hibernate错误：java.lang.ClassCastException：org.hibernate.impl.QueryImpl无法转换为javax.persistence.Query

Question

i try to devlope a small application with java and hibernate, when i run the test class of this application i get this error message:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Hibernate: insert into REUNION (TITREREUNION, DATEREUNION) values (?, ?)
Hibernate: insert into REUNION (TITREREUNION, DATEREUNION) values (?, ?)
Hibernate: insert into REUNION (TITREREUNION, DATEREUNION) values (?, ?)
Exception in thread "main" java.lang.ClassCastException: org.hibernate.impl.QueryImpl     cannot be cast to javax.persistence.Query
at metier.MetierImpl.getAllReunion(MetierImpl.java:62)
at Test.main(Test.java:21)

as you see the error is class MetierImpl : the method that cause the error is :

 public Reunion getAllReunion(){

    Session session =sessionFactory.getCurrentSession();
    session.beginTransaction();
    Query req=(Query) session.createQuery("select R  from Reunion ");
    List<Reunion> list = req.getResultList();
    Reunion r=(Reunion) req.getResultList().get(0);

    return r;


}

Answer 1

Hibernate Session.createQuery() returns an instance of org.hibernate.Query . Your code casts this object to javax.persistence.Query , but it's not an instance of javax.persistence.Query . So you get this exception.

Don't make this cast, and import the correct Query class: not javax.persistence.Query , but org.hibernate.Query .