Java/Email/Email Attachment

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Get Attachment File Name

   <source lang="java">

import java.util.Properties; import javax.mail.Authenticator; import javax.mail.Folder; import javax.mail.Message; import javax.mail.Part; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.URLName; import javax.mail.internet.InternetAddress; public class MainClass {

 public static void main(String[] args) throws Exception {
   URLName server = new URLName("protocol://username@host/foldername");
   Session session = Session.getDefaultInstance(new Properties(), new MailAuthenticator());
   Folder folder = session.getFolder(server);
   if (folder == null) {
     System.out.println("Folder " + server.getFile() + " not found.");
     System.exit(1);
   }
   folder.open(Folder.READ_ONLY);
   Message[] messages = folder.getMessages();
   for (int i = 0; i < messages.length; i++) {
     System.out.println(messages[i].getSize() + " bytes long.");
     System.out.println(messages[i].getLineCount() + " lines.");
     String disposition = messages[i].getDisposition();
     if (disposition == null){
       ; // do nothing
     }else if (disposition.equals(Part.INLINE)) {
       System.out.println("This part should be displayed inline");
     } else if (disposition.equals(Part.ATTACHMENT)) {
       System.out.println("This part is an attachment");
       String fileName = messages[i].getFileName();
       System.out.println("The file name of this attachment is " + fileName);
     }
     String description = messages[i].getDescription();
     if (description != null) {
       System.out.println("The description of this message is " + description);
     }
   }
   folder.close(false);
 }

} class MailAuthenticator extends Authenticator {

 public MailAuthenticator() {
 }
 public PasswordAuthentication getPasswordAuthentication() {
   return new PasswordAuthentication("username", "password");
 }

}


      </source>
   
  
 
  



How to use the FileDataSource to send a file via mail

   <source lang="java">

/*

* @(#)sendfile.java  1.11 03/06/19
*
* Copyright 1996-2003 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
* 
* - Redistribution in binary form must reproduce the above copyright
*   notice, this list of conditions and the following disclaimer in the
*   documentation and/or other materials provided with the distribution.
* 
* Neither the name of Sun Microsystems, Inc. or the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* 
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
* ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES OR LIABILITIES
* SUFFERED BY LICENSEE AS A RESULT OF  OR RELATING TO USE, MODIFICATION
* OR DISTRIBUTION OF THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
* SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
* FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
* 
* You acknowledge that Software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/

import java.util.*; import java.io.*; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*; /**

* sendfile will create a multipart message with the second
* block of the message being the given file.

* * This demonstrates how to use the FileDataSource to send * a file via mail.<p> * * usage: java sendfile to from smtp file true|false * where to and from are the destination and * origin email addresses, respectively, and smtp * is the hostname of the machine that has smtp server * running. file is the file to send. The next parameter * either turns on or turns off debugging during sending. * * @author Christopher Cotton */ public class sendfile { public static void main(String[] args) { if (args.length != 5) { System.out.println("usage: java sendfile <to> <from> <smtp> <file> true|false"); System.exit(1); } String to = args[0]; String from = args[1]; String host = args[2]; String filename = args[3]; boolean debug = Boolean.valueOf(args[4]).booleanValue(); String msgText1 = "Sending a file.\n"; String subject = "Sending a file"; // create some properties and get the default Session Properties props = System.getProperties(); props.put("mail.smtp.host", host); Session session = Session.getInstance(props, null); session.setDebug(debug); try { // create a message MimeMessage msg = new MimeMessage(session); msg.setFrom(new InternetAddress(from)); InternetAddress[] address = {new InternetAddress(to)}; msg.setRecipients(Message.RecipientType.TO, address); msg.setSubject(subject); // create and fill the first message part MimeBodyPart mbp1 = new MimeBodyPart(); mbp1.setText(msgText1); // create the second message part MimeBodyPart mbp2 = new MimeBodyPart(); // attach the file to the message FileDataSource fds = new FileDataSource(filename); mbp2.setDataHandler(new DataHandler(fds)); mbp2.setFileName(fds.getName()); // create the Multipart and add its parts to it Multipart mp = new MimeMultipart(); mp.addBodyPart(mbp1); mp.addBodyPart(mbp2); // add the Multipart to the message msg.setContent(mp); // set the Date: header msg.setSentDate(new Date()); // send the message Transport.send(msg); } catch (MessagingException mex) { mex.printStackTrace(); Exception ex = null; if ((ex = mex.getNextException()) != null) { ex.printStackTrace(); } } } } </source>