JavaMail sample code

Simple JavaMail Reader.java

import javax.mail.*;
import javax.mail.internet.*;

import java.util.*;
import java.io.*;

/**
* A simple class to Read the email.
*/
public class SimpleMailReader
{

public static void main(String args[])
{
try
{
String strServer=args[0];
String strUser=args[1];
String strPassword=args[2];

read(strServer, strUser, strPassword);
}
catch (Exception ex)
{
System.out.println("Usage: java SimpleMailReader"
+" strServer strUser strPassword");
}

System.exit(0);
}

/**
* "read" method to fetch messages and process them.
*/
public static void read(String strServer, String strUser
, String strPassword)
{

Store mystore=null;
Folder myfolder=null;

try
{
Properties p = System.getProperties();
Session session = Session.getDefaultInstance(p, null);

mystore = session.getStore("pop3");
mystore.connect(strServer, strUser, strPassword);

myfolder = mystore.getDefaultFolder();
if (myfolder == null) throw new Exception("No default folder");

myfolder = myfolder.getFolder("INBOX");
if (myfolder == null) throw new Exception("No POP3 INBOX");

myfolder.open(Folder.READ_ONLY);

Message[] msg = myfolder.getMessages();
for (int msgNumber = 0; msgNumber < msg.length; msgNumber++)
{
printMessage(msg[msgNumber]);
}

}
catch (Exception ex)
{
ex.printStackTrace();
}
finally
{
try
{
if (myfolder!=null) myfolder.close(false);
if (mystore!=null) mystore.close();
}
catch (Exception ex2) {ex2.printStackTrace();}
}
}

public static void printMessage(Message message)
{
try
{
String strfrom=((InternetAddress)message.getFrom()[0]).getPersonal();
if (strfrom==null) strfrom=((InternetAddress)message.getFrom()[0]).getAddress();
System.out.println("FROM: "+strfrom);

String strsubject=message.getSubject();
System.out.println("SUBJECT: "+strsubject);

Part msgPart=message;
Object content=msgPart.getContent();

if (content instanceof Multipart)
{
msgPart=((Multipart)content).getBodyPart(0);
System.out.println("[ Multipart Message ]");
}

String contentType=msgPart.getContentType();

System.out.println("CONTENT:"+contentType);

if (contentType.startsWith("text/plain")
|| contentType.startsWith("text/html"))
{
InputStream is = msgPart.getInputStream();

BufferedReader reader
=new BufferedReader(new InputStreamReader(is));
String thisLine=reader.readLine();

while (thisLine!=null)
{
System.out.println(thisLine);
thisLine=reader.readLine();
}
}

System.out.println("-----------------------------");
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}


Simple JavaMail Serder.java



import javax.mail.*;
import javax.mail.internet.*;

import java.util.*;

/**
* A simple email sender class.
*/
public class SimpleMailSender
{

/**
* MAIN method to send a message given on the command line.
*/
public static void main(String args[])
{
try
{
String strstrSmtpServer=args[0];
String strTo=args[1];
String strFrom=args[2];
String strSubject=args[3];
String strBody=args[4];

send(strstrSmtpServer, strTo, strFrom, strSubject, strBody);
}
catch (Exception ex)
{
System.out.println("Usage: java SimpleMailSender"
+" strstrSmtpServer toAddress fromAddress subjectText bodyText");
}

System.exit(0);
}

/**
* "send" method to send the message.
*/
public static void send(String strSmtpServer, String strTo, String strFrom
, String strSubject, String strBody)
{
try
{
java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

Properties p = new Properties(System.getProperties());
// -- Attaching to default Session, or we could start a new one --
// -- Could use Session.getTransport() and Transport.connect()
// , but assume we're using SMTP --


if(strSmtpServer != null)
{
p.put("mail.smtp.starttls.enable","true");
p.put("mail.smtp.host", strSmtpServer);
p.put("mail.transport.protocol", "smtp");
p.put("mail.smtp.starttls.enable","true");
p.put("mail.smtp.auth", "true");


}

Session session = Session.getDefaultInstance(p, null);

// -- Create a new message --
Message msg = new MimeMessage(session);

// -- Set the FROM and TO fields --
msg.setFrom(new InternetAddress(strFrom));
msg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(strTo, false));

// -- We could include CC recipients too --
// if (cc != null)
// msg.setRecipients(Message.RecipientType.CC
// ,InternetAddress.parse(cc, false));

// -- Set the subject and body text --
msg.setSubject(strSubject);
msg.setText(strBody);

// -- Set some other header information --
msg.setHeader("X-Mailer", "KogentEmail");
msg.setSentDate(new Date());

// -- Send the message --
Transport.send(msg);

System.out.println("Message sent OK.");
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}