[1] Mail.java
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.Multipart;
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;
import org.apache.log4j.Logger;
/**
* @author Paresh
*
* Mail class is an email sending utility class.
*
*/
public class Mail {
private static Logger logger = Logger.getLogger(Mail.class.getName());
private Session session = null;
private String SMTP_SERVER = null;
private int SMTP_PORT = 25; // or 587 if your ISP blocks port 25
private String FROM_ADDRESS = null;
private String USER_NAME = null;
private String USER_PASS = null;
private String SMTP_AUTH = null;
private boolean startTLS = false;
public Mail() throws Exception {
Properties p = new Properties();
try {
p.load(new FileInputStream("mail.properties"));
this.SMTP_SERVER = p.getProperty("smtp.host");
this.SMTP_PORT = Integer.parseInt(p.getProperty("smtp.port"));
this.FROM_ADDRESS = p.getProperty("from.address");
this.USER_NAME = p.getProperty("smtp.user");
this.USER_PASS = p.getProperty("smtp.pass");
this.SMTP_AUTH = p.getProperty("smtp.auth");
String startTLS = p.getProperty("smtp.starttls");
if(startTLS != null) {
// Set mail.smtp.starttls.enable = true for gmail
this.startTLS = Boolean.valueOf(startTLS);
}
} catch (Exception e) {
// e.printStackTrace();
logger.error(e.getMessage(), e);
throw e;
}
Properties props = System.getProperties();
props.setProperty("mail.smtp.host", SMTP_SERVER);
props.setProperty("mail.smtp.port", String.valueOf(SMTP_PORT));
props.setProperty("mail.smtp.auth", SMTP_AUTH);
if(this.startTLS)
props.put("mail.smtp.starttls.enable","true");
session = Session.getInstance(props, null);
}
/**
*
* @param emailToList - Compulsory - Minimum 1 recipient is required
* @param emailCcList - Pass null when there is no cc recipient
* @param emailBccList - Pass null when there is no bcc recipient
* @param subject
* @param body
* @param attachmentList - Pass null when there is no attachment
*/
public boolean send(List
Transport trans = null;
try {
if (SMTP_SERVER == null) {
throw new Exception("smtp server not provided.");
}
if(logger.isDebugEnabled())
logger.debug("Sending Email...");
// System.out.println("Email sending...");
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(FROM_ADDRESS));
msg.setSubject(subject);
msg.setSentDate(new Date());
if(emailToList == null || emailToList.isEmpty()) {
throw new Exception("emailToList is empty. Minimum 1 recipient is required...");
}
for (String emailTo : emailToList) {
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(emailTo, true));
}
if(emailCcList != null) {
for (String emailCc : emailCcList) {
msg.addRecipient(Message.RecipientType.CC, new InternetAddress(emailCc, true));
}
}
if(emailBccList != null) {
for (String emailBcc : emailBccList) {
msg.addRecipient(Message.RecipientType.BCC, new InternetAddress(emailBcc, true));
}
}
MimeBodyPart bodyPart = new MimeBodyPart();
bodyPart.setText(body);
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(bodyPart);
if(logger.isDebugEnabled())
logger.debug("Attachment File Names:");
if(attachmentPathList != null) {
for (String attachment : attachmentPathList) {
bodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(attachment);
bodyPart.setDataHandler(new DataHandler(source));
String fileName = attachment.substring(attachment.lastIndexOf("\\") + 1);
if(logger.isDebugEnabled())
logger.debug(fileName);
bodyPart.setFileName(fileName);
multipart.addBodyPart(bodyPart);
}
}
msg.setContent(multipart);
trans = session.getTransport("smtp");
trans.connect(SMTP_SERVER, SMTP_PORT, USER_NAME, USER_PASS);
trans.sendMessage(msg, msg.getAllRecipients());
if(logger.isDebugEnabled())
logger.debug("Email sent successfully...");
// System.out.println("Email sent successfully...");
return true;
} catch (Exception ex) {
// ex.printStackTrace();
logger.error("Email sending failed.", ex);
} finally {
try {
if(trans != null) {
trans.close();
trans = null;
}
} catch(Exception e) {
// ignore
}
}
return false;
}
}
[2] mail.properties
smtp.host =
# generally smtp.port = 25 but for gmail its 587 for TLS or 465 for ssl
smtp.port = 25
smtp.user =
smtp.pass =
smtp.auth = true
# Set smtp.starttls = true for gmail, false otherwise
smtp.starttls = true
from.address =
Note:
Required Files*: [1] mail.jar
Optional Files*: [1] activation.jar**, [2] log4j.jar
* Latest version can be downloaded from internet
**activation package is now part of Java.
**activation package is now part of Java.
