Receiving the org.hibernate.TypeMismatchException Exception [closed]

Answer 1

Your error is

org.hibernate.TypeMismatchException: Provided id of the wrong type. Expected: class java.lang.Integer, got class java.lang.String

In your stacktrace we can see that dbd.create call others methods

    at com.my.dao.DepartementImplDB.getDepartementByNom(DepartementImplDB.java:54)
at com.my.dao.DepartementImplDB.addDepartement(DepartementImplDB.java:29)

In your method

public Departement getDepartementByNom(String nomDepartement)

You try to load a departement with a name but you use session.load wich load by Id.

 Departement dept = (Departement) session.load(Departement.class, nomDepartement);

You have to make a Criteria request to load by name. Like

session.beginTransaction();
Criteria criteria = session.createCriteria(Departement.class);
criteria.add(Restrictions.eq("nomDepartement", nomDepartement).ignoreCase());

 result = (Departement) criteria.uniqueResult();
 session.getTransaction().commit();

ps: In getDepartementById and getDepartementByNom you never end your transaction. Please use pattern like:

 try {
        session.beginTransaction();

        // your code

        session.getTransaction().commit();
    } catch (HibernateException e) {
        LOGGER.error(e);
        if (session.getTransaction().isActive()) {
            session.getTransaction().rollback();
        }
    }

Answer 2

Exception:-
Provided id of the wrong type. Expected: class java.lang.Integer, got class java.lang.String

Its very clear by seeing the above line, hibernate is expecting the id as an integer but receiving id in the String format. So it's throwing :-
org.hibernate.TypeMismatchException