to this servlet i have to get values of to,from address and filename from a jsp though all jar files are put in class path the servlet is not recognized

public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String to = request.getParameter("to");
        String from = request.getParameter("from");
        String host = request.getParameter("host");
        String filename = request.getParameter("filename");
        //String msgText1 = "Sending a file.\n";
        //String subject = "Sending a file";

//       create some properties and get the default Session
        Properties props = System.getProperties();
//      Add property for smtp server.
        props.put("", host);

        Session mailSession = 
          Session.getDefaultInstance(props, null); 

        Message msg = new MimeMessage(mailSession);
        msg.setFrom(new InternetAddress(from));
        msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to,false));
          ( "", false));
          "This message was sent with JavaMail...");

        MimeBodyPart mbp1 = new MimeBodyPart();
        mbp1.setText("JavaMail... It works! ");

        MimeBodyPart mbp2 = new MimeBodyPart();
        /** Create the FileDataSource.  The constructor requires the fully
        qualified path to the file.  Note that we use
        File.separator to put the correct separator (/,\,:,etc) between
        the directory and file name.  This way, you can pass in the path
        and file_name and your email program doesn't care if it is running
        on Unix, Windows or Macintosh.**/

        String file_dir = "D:/";
        String file_name = filename;
        String fs = System.getProperty("file.separator");
        FileDataSource fds = new FileDataSource(file_dir+fs+file_name);
//       Next, attach the file data source to the MimeBodyPart 
        mbp2.setDataHandler(new DataHandler(fds));
        /** We can use the MimeBodyPart.setFileName() method to set the
        name of the attachment as it will appear in the email. Generally,
        this is set to the name used to generate the data source (fds.getName()),
        although you can set it to any String value. **/

//       create the Multipart and its parts to it
        Multipart mp = new MimeMultipart();
//       add the Multipart to the MimeMessage object msg 

//       use the static Transport method to send the

        System.out.println("Message Sent");
        catch (MessagingException mex) {
              Exception ex = null;
              if ((ex = mex.getNextException()) != null) {


Have you properly configured the servlet information in the web.xml file... ???

<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>


In web.xml this is all what i have what else should i include

a new problem servlet is recognized but the jar files after deploying will not be there in lib why