Sending Email with Attachments By using Java Mail:

This MailNotification Class holds a method that sends the emails with attachments
by using Java Mail API.

import java.io.*;
import java.net.*;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

 public class MailNotificationSender  {
  private Session mailConn = null;
  private String msgFromDefault = null;
  private String mailUser = null;
  private String mailPass = null;
  private String mailHost = null;
  private static Logger logger = Logger.getLogger(MailNotificationSender.class.getName());
 
  /**
   * this constrcutor config the message server details
   *
   * @throws NotificationException
   */  
  public MailNotificationSender() throws NotificationException  {
    try {
      Properties mailprops = new Properties();
      MailAuthenticator mailAuth = null;
      msgFromDefault = PropertyReader.readProperty(
                NotificationConstant.MAIL_FROM_DEFAULT);
      mailUser = PropertyReader.readProperty(
                NotificationConstant.MAIL_USER);
      mailPass = PropertyReader.readProperty(
        NotificationConstant.MAIL_PASS);
      mailHost = PropertyReader.readProperty(
        NotificationConstant.MAIL_HOST)!=null?NotificationPropertyReader.readProperty(
        NotificationConstant.MAIL_HOST):
       InetAddress.getLocalHost().getHostName();
      //initialize mail properties
      mailprops.setProperty("mail.smtp.host",mailHost);
      //if username and password provided, create an authenticator
      if(mailUser != null && mailPass != null) {
        mailAuth = new MailAuthenticator(mailUser,mailPass);
      }
      //Create the mail connection
      //mailConn = Session.getDefaultInstance(mailprops,mailAuth);
   mailConn = Session.getDefaultInstance(mailprops,null);
    }catch(Exception e){
      //log the error
      error("init()", e.getMessage());
      e.printStackTrace();
    }
  }
 
 
  /**
   * Sends email from SMTP server
   *
   * @param String msgTo
   * @param String msgFrom
   * @param String msgReplyTo
   * @param String msgSubject
   * @param String msgContent
   * @param String msgContentType
   * @param Vector msgAttachments
   */
  public void sendMailWithAttachments(String msgTo,
    String msgFrom, String msgSubject, String msgContent,
    String msgContentType, List msgAttachments, String msgReplyTo) {
   try{
      MimeBodyPart mbpFileAttachment = null;
      MimeMultipart mp = new MimeMultipart();
      Message msg = new MimeMessage(mailConn);
      if(msgFrom == null|| msgFrom.length() == 0) msgFrom = msgFromDefault;
      msg.setFrom(new InternetAddress(msgFrom));
      // replyTo address
      if ( msgReplyTo != null && msgReplyTo.length() != 0 ) {
       msg.setReplyTo( InternetAddress.parse(msgReplyTo, false) );
   }
      //to address
      msg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(msgTo, false));
      //subject
      msg.setSubject(msgSubject);
      //message body
      MimeBodyPart mbpBodyText = new MimeBodyPart();
      mbpBodyText.setContent(msgContent, msgContentType);
      mp.addBodyPart(mbpBodyText);
      //Add the attachments
      Iterator iterator = msgAttachments.iterator();
      while(iterator.hasNext()){
        Object msgAttach = iterator.next();
        FileDataSource fds = null;
        File attachFile = null;
        if(msgAttach instanceof File) {
          attachFile = (File)msgAttach;
        }else if(msgAttach instanceof String){ //this is added by Siva Malladi
          //for attaching files from DT, EX. PSS Waiver Form
          attachFile = new File((String)msgAttach);
        }
        if(attachFile!=null&&attachFile.exists()){
          mbpFileAttachment = new MimeBodyPart();
          fds = new FileDataSource(attachFile);
          mbpFileAttachment.setDataHandler(new DataHandler(fds));
          mbpFileAttachment.setFileName(fds.getName());
          mp.addBodyPart(mbpFileAttachment);
        }
      }
      msg.setContent(mp);
      Transport.send(msg);
    }catch(Exception e){
      //log the error
      error("sendMailWithAttachments()",e.toString());
    }
  }
 }

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