Send Email With Java

I am having a small query regarding the java programming language.
I just wanted to know the code that which would help me in sending the email to users periodically such as every month end of the day.

Please let me know the ways that can be apllied using java.

Code:

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import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;

public void postMail( String recipients[ ], String subject, String message , String from) throws MessagingException
{
    boolean debug = false;

    //Set the host smtp address
    Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.jcom.net");

    // create some properties and get the default Session
    Session session = Session.getDefaultInstance(props, null);
    session.setDebug(debug);

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

    // set the from and to address
    InternetAddress addressFrom = new InternetAddress(from);
    msg.setFrom(addressFrom);

    InternetAddress[] addressTo = new InternetAddress[recipients.length];
    for (int i = 0; i < recipients.length; i++)
    {
        addressTo[i] = new InternetAddress(recipients[i]);
    }
    msg.setRecipients(Message.RecipientType.TO, addressTo);
 

    // Optional : You can also set your custom headers in the Email if you Want
    msg.addHeader("MyHeaderName", "myHeaderValue");

    // Setting the Subject and Content Type
    msg.setSubject(subject);
    msg.setContent(message, "text/plain");
    Transport.send(msg);
}

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Code:

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import javax.mail.*;
 import javax.mail.internet.*;
 import javax.activation.*;
 import java.io.*;
 import java.util.Properties;
 public class MailClient
 {
      public void sendMail(String mailServer, String from, String to,
                            String subject, String messageBody,
                            String[] attachments) throws
MessagingException, AddressException
    {
        // Setup mail server
        Properties props = System.getProperties();
        props.put("mail.smtp.host", mailServer);
         
        // Get a mail session
        Session session = Session.getDefaultInstance(props, null);
         
        // Define a new mail message
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject(subject);
         
        // Create a message part to represent the body text
        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText(messageBody);
        //use a MimeMultipart as we need to handle the file attachments
        Multipart multipart = new MimeMultipart();
          //add the message body to the mime message
        multipart.addBodyPart(messageBodyPart);
        // add any file attachments to the message
        addAtachments(attachments, multipart);
          // Put all message parts in the message
        message.setContent(multipart);
        // Send the message
        Transport.send(message);
      }
      protected void addAtachments(String[] attachments, Multipart multipart)
                    throws MessagingException, AddressException
    {
        for(int i = 0; i<= attachments.length -1; i++)
        {
            String filename = attachments[i];
            MimeBodyPart attachmentBodyPart = new MimeBodyPart();
            //use a JAF FileDataSource as it does MIME type detection
            DataSource source = new FileDataSource(filename);
            attachmentBodyPart.setDataHandler(new DataHandler(source));
            //assume that the filename you want to send is the same as the
            //actual file name - could alter this to remove the file path
            attachmentBodyPart.setFileName(filename);
             
            //add the attachment
            multipart.addBodyPart(attachmentBodyPart);
        }
    }
 
    public static void main(String[] args)
    {
        try
        {
            MailClient client = new MailClient();
            String server="pop3.mydomain.com";
            String from="[email protected]";
            String to = "[email protected]";
            String subject="Test";
            String message="Testing";
            String[] filenames =
{"c:\somefile.txt"};
          client.sendMail(server,from,to,subject,message,filenames);
        }
        catch(Exception e)
        {
            e.printStackTrace(System.out);
        }
         
    }
 }

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