Sending Email Attachments With Java Mail API

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Sending Email AttachmentsWith Java Mail API

• Lecture 10

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Emails

• An email message is composed of multiple parts,
  usually called Message Body Parts or MIME body
  parts.
• Simple text mails consist of only one part
• We can create and add new parts to one email
  message before sending it

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Attaching Documents

• Following steps are required to attach a FILE to
  an email
• Create an email message and set its parameters
  for delivery
• Create a MIME body part containing message text
• Create a MIME body part containing attachment
• Associate these parts with the email message
• Send the message

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Create an email message and set its parameters
for delivery

• // Get system properties
• Properties props System.getProperties()
• // Setup mail server
• props.put("mail.smtp.host", "202.125.140.71")
• // Get session
• Session session Session.getDefaultInstance(prop
  s, null)
• Message message new MimeMessage(session)
• message.setFrom(new InternetAddress("testing_at_ba
  sitali.com"))
• message.addRecipient(Message.RecipientType.TO,
• new InternetAddress("basit_at_ucp.edu.pk"))
• message.setSubject("Hello JavaMail Attachment")

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Create a MIME body part containing message text

• // Create the message part
• BodyPart messageBodyPart new MimeBodyPart()
• // Fill the message
• messageBodyPart.setText("this is the first text
  part")

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Create a MIME body part containing attachment

• BodyPart attachmentBodyPart new MimeBodyPart()
• // Part two is attachment
• DataSource source new FileDataSource("testfile.t
  xt")
• attachmentBodyPart.setDataHandler(new
  DataHandler(source))
• attachmentBodyPart.setFileName("testfile.txt")

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Associate these parts with the email message

• Multipart multipart new MimeMultipart()
• multipart.addBodyPart(messageBodyPart)
• multipart.addBodyPart(attachmentBodyPart)
• // Put parts in message
• message.setContent(multipart)

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Finally Sending the message

• // Send the message
• Transport.send(message)

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Deleting Messages

• Deleting Messages and Flags
• Deleting messages involves working with the Flags
  associated with the messages.
• There are different flags for different states,
  some system-defined and some user-defined.

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Deleting Messages

• The predefined flags are defined in the inner
  class Flags.Flag and are listed below
• Flags.Flag.ANSWERED
• Flags.Flag.DELETED
• Flags.Flag.DRAFT
• Flags.Flag.FLAGGED
• Flags.Flag.RECENT
• Flags.Flag.SEEN
• Flags.Flag.USER

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Deleting Emails

• To delete messages, you set the message's DELETED
  flag
• message.setFlag(Flags.Flag.DELETED, true)
• Open up the folder in READ_WRITE mode first
  though
• folder.open(Folder.READ_WRITE)
• Then, when you are done processing all messages,
  close the folder, passing in a true value to
  expunge the deleted messages.
• folder.close(true)

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A good tutorial

• http//java.sun.com/developer/onlineTraining/JavaM
  ail/contents.htmlJavaMailIntro