Developing the E-Mail Sender Servlet by Gopalan Suresh Raj

Note

To work with any of these samples, you will need the following:
.........................................JDK 1.1.7 or higher

To work with the Servlets and JSP, you will need
.........................................JSWDK 1.0.1 or higher

To work with the Java Mail API, you will need
.........................................JavaMail 1.1.3 or higher
.........................................Java Activation Framework 1.0.1 or higher
.........................................POP3 Provider 1.1.1 or higher

Develop the EmailSendServlet and compile the piece of code to generate the class file.

EmailSendServlet.java

import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import EmailHandler.*;

public class EmailSendServlet extends HttpServlet { 
 
 private static String ERROR_URL = "/EmailSendError.html";
 private static String REDIRECT_URL = "/jsp/EmailHandler/EmailContents.jsp";
 // Substitute the following code with your SMTP mail Host name
 private static String SMTP_HOST = "mail.myProvider.com";
 
 public void init (ServletConfig config) throws ServletException {
  
  super.init (config);
 }
 
 public void doPost (HttpServletRequest request, HttpServletResponse response) 
  throws ServletException, IOException {
  
  HttpSession session = request.getSession (false);
  if (null == session) {
   response.sendRedirect (ERROR_URL);
  }
  
  String from = request.getParameter ("FromBox");
  String toStream = request.getParameter ("ToBox");
  String ccStream = request.getParameter ("CcBox");
  String bccStream = request.getParameter ("BccBox");
  String subject = request.getParameter ("SubjectBox");
  String body = request.getParameter ("BodyBox");
  
  Vector to = getValuesFromStream (toStream);
  Vector cc = getValuesFromStream (ccStream);
  Vector bcc = getValuesFromStream (bccStream);
  
  Vector emailList = new Vector ();
  EmailContents emailContents = new EmailContents (from, to, cc, bcc, subject, body);
  emailList.addElement (emailContents);
  session.putValue ("EmailHandler.emailContents", emailList);
  
  SendMultipartMessage message = new SendMultipartMessage (emailContents);
  boolean result = message.sendMail (SMTP_HOST);
  if(false == result) {
   response.sendRedirect (ERROR_URL);
  }
  else {
   ServletContext context = getServletContext ();
   RequestDispatcher dispatcher = context.getRequestDispatcher (REDIRECT_URL);
   dispatcher.forward (request, response);
  }
  
 }
 
 private Vector getValuesFromStream (String stream) {
  
  Vector holder = new Vector();
  String element = null;
  int i = 0;
  
  StringTokenizer tokenizer = new StringTokenizer (stream, ",;");
  while (tokenizer.hasMoreTokens()) {
   element = tokenizer.nextToken();
   holder.addElement (element);
   System.out.println(element);
  }
  
  return holder;
 }
}

2. Compile this code and Move the class file to the servlets directory at "jswdk-1.0.1\examples\WEB-INF\servlets\".