public void setViewUser () throws IOException {

    UserDAOImpl dao = new UserDAOImpl();

    User user = dao.findById(id_user);
    id_user = user.getId_user();
    nom = user.getNom();
    prenom = user.getPrenom();
    mail = user.getMail();
    dette = user.getDette();
    telephone = user.getTelephone();
    adressePostal =user.getAdressePostal();
    nombre_objet_reserve = user.getNombre_objet_reserve();
    nombre_objet_loue =user.getNombre_objet_loue();
    FacesContext.getCurrentInstance().getExternalContext().redirect("Compte_client.xhtml");

}

private serviceMethods serviceMethods = new serviceMethods();
List<Pl> list = serviceMethods.ListPl(id_user);
@SuppressWarnings("unchecked")
List<Pl> pllist = (List<Pl>)(Object) list;

@SuppressWarnings("unchecked")
public List<Pl> ListPl(Integer id) {

                String queryString = "from Pl f where f.user= :id) ";

             Session sess = HibernateUtil.openSession();
             Query query = sess.createQuery(queryString);
             query.setParameter("id", id);
             List<Pl> listObject = (List<Pl>) query.list();
              sess.getTransaction();
              sess.close();
              return listObject;

            }

<h:dataTable class="table table-bordered" id="dataTable" width="100%" cellspacing="0" value="#{AffichUserBean.pllist}" var="t">

        <h:column><f:facet name="header">idres</f:facet>#{t.coutFinal}</h:column>

      <h:column><f:facet name="header">deadline</f:facet>#{t.caution_produit}</h:column>
         <h:column><f:facet name="header">defauts</f:facet>#{t.defauts}</h:column>


          </h:dataTable>