String link=new String("index.jsp?name="+metadata.getName()+"&"+"title="+metadata.getTitle()+"&"+"author="+metadata.getAuthor()
             +"&subject="+metadata.getSubject()+"&size="+metadata.getSize()+"&type="+metadata.getType()+
             "&creation_date="+metadata.getCreationDate()+"&modification_date="+metadata.getModificationDate()+"&timest="+timestamp);
            link=response.encodeURL(link);

        response.sendRedirect
             (response.encodeRedirectURL(link));