How to send an iCal meeting request using Java Mail, and receive the response

Question

I\'m trying to send an iCal to an outlook, using Java Mail Library, I\'ve read already the Question, and I already have some sample code

public class SendMe         


        

Answer 1

I'd tried with Amr answer but I got an error in Session session = Session.getDefaultInstance(prop, null),

Well I fixed and here is the code I used and it worked perfectly. I hope it helps
Remember you need to add javax.mail library to your project

import java.util.Properties;
import javax.activation.DataHandler;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.util.ByteArrayDataSource;

public class Email {

 public Email() {
 }

 public static void main(String[] args) {
     try {
         Email email = new Email();
         email.send();
     } catch (Exception e) {
         e.printStackTrace();
     }
 }

 public void send() throws Exception {

    try {
        String from = "FromExample@gmail.com";
        String to = "ToExample@gmail.do";
        Properties prop = new Properties();

        prop.put("mail.smtp.auth", "true");
        prop.put("mail.smtp.starttls.enable", "true");
        prop.put("mail.smtp.host", "smtp.gmail.com");
        prop.put("mail.smtp.port", "587");

        final String username = "FromExample@gmail.com";
        final String password = "123456789";

        Session session = Session.getInstance(prop,
                  new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(username, password);
                    }
                  });

        // Define message
        MimeMessage message = new MimeMessage(session);
        message.addHeaderLine("method=REQUEST");
        message.addHeaderLine("charset=UTF-8");
        message.addHeaderLine("component=VEVENT");

        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject("Outlook Meeting Request Using JavaMail");

        StringBuffer sb = new StringBuffer();

        StringBuffer buffer = sb.append("BEGIN:VCALENDAR\n" +
                "PRODID:-//Microsoft Corporation//Outlook 9.0 MIMEDIR//EN\n" +
                "VERSION:2.0\n" +
                "METHOD:REQUEST\n" +
                "BEGIN:VEVENT\n" +
                "ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:xxx@xx.com\n" +
                "ORGANIZER:MAILTO:xx@xx.com\n" +
                "DTSTART:20180922T053000Z\n" +
                "DTEND:20180927T060000Z\n" +
                "LOCATION:Conference room\n" +
                "TRANSP:OPAQUE\n" +
                "SEQUENCE:0\n" +
                "UID:040000008200E00074C5B7101A82E00800000000002FF466CE3AC5010000000000000000100\n" +
                " 000004377FE5C37984842BF9440448399EB02\n" +
                "DTSTAMP:20180922T120102Z\n" +
                "CATEGORIES:Meeting\n" +
                "DESCRIPTION:This the description of the meeting.\n\n" +
                "SUMMARY:Test meeting request\n" +
                "PRIORITY:5\n" +
                "CLASS:PUBLIC\n" +
                "BEGIN:VALARM\n" +
                "TRIGGER:PT1440M\n" +
                "ACTION:DISPLAY\n" +
                "DESCRIPTION:Reminder\n" +
                "END:VALARM\n" +
                "END:VEVENT\n" +
                "END:VCALENDAR");

        // Create the message part
        BodyPart messageBodyPart = new MimeBodyPart();

        // Fill the message
        messageBodyPart.setHeader("Content-Class", "urn:content-  classes:calendarmessage");
        messageBodyPart.setHeader("Content-ID", "calendar_message");
        messageBodyPart.setDataHandler(new DataHandler(
                new ByteArrayDataSource(buffer.toString(), "text/calendar")));// very important

        // Create a Multipart
        Multipart multipart = new MimeMultipart();

        // Add part one
        multipart.addBodyPart(messageBodyPart);

        // Put parts in message
        message.setContent(multipart);

        // send message


        Transport.send(message);

        System.out.println("Success");

    } catch (MessagingException me) {
        me.printStackTrace();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
 }
}