/********************************** Avis Operation *****************************************/
public String imprimerRapport(String format, String modeleRapport,String nomRapport,Object rs,Map parametters) {
try{
byte[] bytes ;JasperPrint jasperPrint=null;
JasperDesign jasperDesign = JRXmlLoader.load(readProperties.readChemin("Etats.local")+modeleRapport);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
FacesContext context = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
if(rs instanceof List) {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource((List) rs);