Ecrire le servlet public class PopupServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType( text/xml;charset=UTF-8 ); PrintWriter out = response.getWriter(); BookstoreMessages messages=new BookstoreMessages(); String bookId=request.getParameter( bookId ); try { out.println( ); if(bookId != null) { BookDBAO bookDBAO=(BookDBAO)getServletContext().getAttribute( bookDBAO ); Book book=bookDBAO.getBook(bookId); out.println( ); out.println( <![CDATA[ ); out.println( + book.getTitle() + ); // etc.