EmailServlet.javaAPI DocExample3617Sat Feb 21 15:06:06 GMT 2004com.jspservletcookbook

package com.jspservletcookbook;    

import java.util.Properties;

import javax.mail.*;
import javax.mail.internet.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class EmailServlet extends HttpServlet {

   //default value for mail server address, in case the user 
   //doesn't provide one
   private final static String DEFAULT_SERVER = "";

  public void doPost(HttpServletRequest request, 
      HttpServletResponse response) throws ServletException,
          //obtain the values for email components from
    //request parameters
    String smtpServ = request.getParameter("smtp");

    if (smtpServ == null || smtpServ.equals(""))
        smtpServ = DEFAULT_SERVER;

    String from = request.getParameter("from");

    String to = request.getParameter("to");

    String subject = request.getParameter("subject");

    String emailContent = request.getParameter("emailContent");
    response.setContentType("text/html"); out = response.getWriter();
    out.println("<html><head><title>Email message sender</title></head><body>");
       try {
           sendMessage(smtpServ, to, from, subject, emailContent);
       } catch (Exception e) {
           throw new ServletException(e.getMessage()); 
        "<h2>The message was sent successfully</h2>");

     } //doPost
  private void sendMessage(String smtpServer, String to, String from, String subject,String emailContent) throws Exception {
    Properties properties = System.getProperties();

    //populate the 'Properties' object with the mail
    //server address, so that the default 'Session'
    //instance can use it.
    properties.put("", smtpServer);

    Session session = Session.getDefaultInstance(properties);
    Message mailMsg = new MimeMessage(session);//a new email message

    InternetAddress[] addresses = null;
    try {

        if (to != null) {
            //throws 'AddressException' if the 'to' email address
            //violates RFC822 syntax
            addresses = InternetAddress.parse(to, false);

            mailMsg.setRecipients(Message.RecipientType.TO, addresses);
         } else {
            throw new MessagingException(
                "The mail message requires a 'To' address.");

        if (from != null) {
            mailMsg.setFrom(new InternetAddress(from));
        } else {
            throw new MessagingException(
            "The mail message requires a valid 'From' address.");
        if (subject != null)

        if (emailContent != null)
        //Finally, send the meail message; throws a 'SendFailedException' 
        //if any of the message's recipients have an invalid adress
        } catch (Exception exc) {
         throw exc;
    public void doGet(HttpServletRequest request, 
      HttpServletResponse response) throws ServletException,
		      doPost(request, response);