How to Send Mail to Outlook i Calender Meeting Remainder ( ICS )

//use below sample and enjoy, which i taken from another site and modify with my choice..
//hope this will help you a lot and give me a copy of yours if u done any modification..

package com.test;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Properties;

import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class EmailRemainder
{
    public BodyPart buildHtmlTextPart () throws MessagingException
    {

        MimeBodyPart descriptionPart = new MimeBodyPart ();

        // Note: even if the content is spcified as being text/html, outlook won't read correctly tables at all
        // and only some properties from div:s. Thus, try to avoid too fancy content
        String content = "Sample Body Content";
        descriptionPart.setContent ( content, "text/html; charset=utf-8" );

        return descriptionPart;
    }

    // define somewhere the icalendar date format
    private static SimpleDateFormat    iCalendarDateFormat    = new SimpleDateFormat ( "yyyyMMdd'T'HHmm'00'" );

    public BodyPart buildCalendarPart (String fromMailId, String location, String description ) throws Exception
    {

        BodyPart calendarPart = new MimeBodyPart ();

        //System.out.println ( TimeZone.getTimeZone ( "UTC" ) );
        Calendar cal = Calendar.getInstance ();   //TimeZone.getDefault () //TimeZone.getTimeZone ( "UTC" )
        //cal.add ( Calendar.DAY_OF_MONTH, 1 );
        cal.add ( Calendar.MINUTE, 10 );
        Date start = cal.getTime ();
        System.out.println ( "Meeting Start Time : " + start );
       
        //cal.add ( Calendar.HOUR_OF_DAY, 3 );
        cal.add ( Calendar.MINUTE, 15 );
        Date end = cal.getTime ();
        System.out.println ( "Meeting End Time : " + end );
       
        // check the icalendar spec in order to build a more complicated meeting request
        String calendarContent =
                "BEGIN:VCALENDAR\n"
               
                    + "METHOD:REQUEST\n"
                    + "PRODID:-//Sdex Portal//NONSGML Sdex//EN\n"
                    + "VERSION:2.0\n"
               
                    + "BEGIN:VTIMEZONE\n"
                    + "TZID:India Standard Time\n"
                        + "BEGIN:STANDARD\n"
                        + "DTSTART:" + iCalendarDateFormat.format ( start ) + "\n"
                        + "TZOFFSETFROM:+0530\n"
                        + "TZOFFSETTO:+0530\n"
                        + "END:STANDARD\n"
                    + "END:VTIMEZONE\n"
                   
                    + "BEGIN:VEVENT\n"
                    + "DTSTAMP:" + iCalendarDateFormat.format ( start ) + "\n"
                    + "DTSTART:" + iCalendarDateFormat.format ( start ) + "\n"
                    + "DTEND:" + iCalendarDateFormat.format ( end ) + "\n"
                    + "SUMMARY:test request\n"
                    + "UID:" + Math.random () +"\n"
                    + "ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE:MAILTO:"+ fromMailId +"\n"
                    + "ORGANIZER:MAILTO:"+ fromMailId +"\n"
                    + "LOCATION:"+ location +"\n"
                    + "DESCRIPTION:"+ description +"\n"
                    + "SEQUENCE:1\n"
                    + "PRIORITY:1\n"
                    + "CLASS:PUBLIC\n"
                    + "STATUS:CONFIRMED\n"
                    + "TRANSP:OPAQUE\n"
                        + "BEGIN:VALARM\n"
                        + "ACTION:DISPLAY\n"
                        + "DESCRIPTION:REMINDER\n"
                        + "TRIGGER;RELATED=START:-PT00H15M00S\n"
                        + "END:VALARM\n"
                    + "END:VEVENT\n"
                   
                + "END:VCALENDAR";

        calendarPart.addHeader ( "Content-Class", "urn:content-classes:calendarmessage" );
        calendarPart.setContent ( calendarContent, "text/calendar;method=REQUEST" );

        return calendarPart;
    }

    public static void main ( String args[] ) throws Exception
    {
        String fromMailId = "vijay@XXXXXXX.com";
        String toMailId = "vkumar@XXXXXXX.com";
        final String userName = "vijay@XXXXXXX.com";
        final String password = "test123";
        String protocol = "smtp";
        int port  = 25;
       
        Session session = null;
        // Security.addProvider ( new com.sun.net.ssl.internal.ssl.Provider () ); //this will use for SSL/HTTPS
        Properties props = new Properties ();
        props.setProperty ( "mail.transport.protocol", protocol );
        props.setProperty ( "mail.host", "smtp.yourserver.com" );
        props.put ( "mail.debug", "false" );
        props.put ( "mail.smtp.port", port );
        if ( Boolean.parseBoolean ( "true" ) )
        {
            props.put ( "mail.smtp.auth", "true" );
            props.put ( "mail.smtp.socketFactory.port", port );
        }
        if ( Boolean.parseBoolean ( "false" ) )
        {
            props.put ( "mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory" );
            props.put ( "mail.smtp.socketFactory.fallback", "false" );
        }
        if ( Boolean.parseBoolean ( "true" ) )
        {
            session = Session.getDefaultInstance ( props, new javax.mail.Authenticator () {
                // @Override
                protected PasswordAuthentication getPasswordAuthentication ()
                {
                    return new PasswordAuthentication ( userName, password );
                }
            } );
        }
        else
        {
            session = Session.getInstance ( props );
        }

        // session.setDebug ( true );

        EmailRemainder emailRemainder = new EmailRemainder ();
        MimeMessage message = new MimeMessage ( session );
        message.setFrom ( new InternetAddress ( fromMailId ) );
        message.setSubject ( "Subject: Hi 2" );
        message.addRecipient ( Message.RecipientType.TO, new InternetAddress ( toMailId ) );
        // Create an alternative Multipart
        Multipart multipart = new MimeMultipart ( "alternative" );
        // part 1, html text
        BodyPart messageBodyPart = emailRemainder.buildHtmlTextPart ();
        multipart.addBodyPart ( messageBodyPart );

        // Add part two, the calendar
        BodyPart calendarPart = emailRemainder.buildCalendarPart ( fromMailId, "Meeting on your domain.com", "sample description" );
        multipart.addBodyPart ( calendarPart );

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

        // send the message
        Transport transport = session.getTransport ( protocol );
        transport.connect ();
        transport.sendMessage ( message, message.getAllRecipients () );
        transport.close ();

            System.out.println ("done");
    }
}