String motcle = annonceForm.getMotsCles();
String[] tabMotcle = motcle.split(";");
MotCle m;
MotCleDao motDao = new MotCleDao();
for(int i=0; i<tabMotcle.length; i++){
m = motDao.getAndCreateByLibelle(tabMotcle[i]);
motscles.add(m);
}
annonce.setMotsCles(motscles);