Java code sending Mail with Attachment using Java Mail API

Introduction

In a day-to-day life the emails are occupied our life.If we can send our mails by using our java code without help of browser how we feel?

This article do this.By using the JavaMail API send our mail with attachment without help of browser.This code need a mail.jar file.You can download this at http://www.java2s.com/Code/Jar/JKL/Downloadmailjar.htm

Code:

/ * This code is only for design the frame
 *
 * @author muneeswaran
 */
package com.mail;

import javax.mail.MessagingException;
import javax.swing.*;

public class MailSender extends JFileChooser
{

    private JTextField attachmentTextField;
    private JLabel jLabel1, jLabel2, jLabel3, jLabel4, jLabel5, jLabel6;
    private JScrollPane jScrollPane1;
    private JTextArea messageTextArea;
    private JButton sendButton, cancelButton, browseButton;
    private JTextField ccTextField, subjectTextField, toTextField;
    String toAddress = null, ccAddress = null, message = null,
            receipientsList[] = null, attachments[] = null, receipients, subject;
    String fromAddress = "put your full mail id"; //Place your mail id here.
    String authenticationPassword = "your password";//Place your password here

    public MailSender()
    {
        initComponents();
    }

    private void initComponents()
    {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel("To");
        toTextField = new javax.swing.JTextField(20);
        jLabel3 = new javax.swing.JLabel("CC");
        ccTextField = new javax.swing.JTextField(20);
        jLabel4 = new javax.swing.JLabel("Subject");
        subjectTextField = new javax.swing.JTextField(20);
        jLabel5 = new javax.swing.JLabel("Attachemnet");
        attachmentTextField = new javax.swing.JTextField(20);
        browseButton = new javax.swing.JButton("Browse");
        jLabel6 = new javax.swing.JLabel("Message");
        jScrollPane1 = new javax.swing.JScrollPane();
        messageTextArea = new javax.swing.JTextArea(20, 10);
        sendButton = new javax.swing.JButton();
        cancelButton = new javax.swing.JButton();

        //setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("AlMateen-Bold", 3, 14)); // NOI18N
        jLabel1.setForeground(new java.awt.Color(1, 203, 221));
        jLabel1.setText("Mail Sender");
        jScrollPane1.setViewportView(messageTextArea);
        sendButton.setText("Send");
        sendButton.addActionListener(new java.awt.event.ActionListener()
        {

            public void actionPerformed(java.awt.event.ActionEvent evt)
            {
                sendButtonActionPerformed(evt);
            }
        });

        cancelButton.setText("Cancel");
        cancelButton.addActionListener(new java.awt.event.ActionListener()
        {

            public void actionPerformed(java.awt.event.ActionEvent evt)
            {
                cancelButtonActionPerformed(evt);
            }
        });

        browseButton.addActionListener(new java.awt.event.ActionListener()
        {

            public void actionPerformed(java.awt.event.ActionEvent evt)
            {
                browseButtonActionPerformed(evt);
            }
        });

        jLabel1.setBounds(100, 50, 200, 50);
        jLabel2.setBounds(50, 100, 100, 50);
        toTextField.setBounds(150, 100, 300, 40);

        jLabel3.setBounds(50, 150, 100, 50);
        ccTextField.setBounds(150, 150, 300, 40);

        jLabel4.setBounds(50, 200, 100, 50);
        subjectTextField.setBounds(150, 200, 300, 40);

        jLabel5.setBounds(50, 250, 100, 50);
        attachmentTextField.setBounds(150, 250, 200, 40);
        browseButton.setBounds(375, 250, 100, 20);

        jLabel6.setBounds(50, 300, 100, 50);
        messageTextArea.setBounds(150, 300, 300, 40);

        sendButton.setBounds(100, 400, 75, 20);
        cancelButton.setBounds(200, 400, 75, 20);
        JFrame mailFrame = new JFrame("Mail Sender");
        mailFrame.add(jLabel1);
        mailFrame.add(jLabel2);
        mailFrame.add(toTextField);
        mailFrame.add(jLabel3);
        mailFrame.add(ccTextField);
        mailFrame.add(jLabel4);
        mailFrame.add(subjectTextField);
        mailFrame.add(jLabel5);
        mailFrame.add(attachmentTextField);
        mailFrame.add(browseButton);
        mailFrame.add(jLabel6);
        mailFrame.add(messageTextArea);
        mailFrame.add(sendButton);
        mailFrame.add(cancelButton);

        mailFrame.setLayout(null);
        mailFrame.setVisible(true);
        mailFrame.setSize(500, 500);
        mailFrame.setResizable(false);
        mailFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void cancelButtonActionPerformed(java.awt.event.ActionEvent evt)
    {
        // TODO add your handling code here:
    }

    private void browseButtonActionPerformed(java.awt.event.ActionEvent evt)
    {
        JFileChooser selectFile = new JFileChooser();
        selectFile.showOpenDialog(this);
        attachmentTextField.setText(selectFile.getSelectedFile().toString());
    }

    private void sendButtonActionPerformed(java.awt.event.ActionEvent evt)
    {

        toAddress = toTextField.getText().trim();
        ccAddress = ccTextField.getText().trim();
        subject = subjectTextField.getText().trim();
        message = messageTextArea.getText().trim();
        String attachment = attachmentTextField.getText() + " ";

        attachments = attachment.split(" ");

        receipients = toAddress + "," + ccAddress;
        receipientsList = receipients.split(",");

        SendMailUsingAuthentication mailUsingAuthentication =
                new SendMailUsingAuthentication();
        try {
            mailUsingAuthentication.postMail(receipientsList,
                    subject, message, fromAddress, authenticationPassword, attachments);
        } catch (MessagingException messagingException) {
            messagingException.printStackTrace();
        }
    }

    void login(String userName, String password)
    {
        fromAddress = userName;
        authenticationPassword = password;
        System.out.println("User name : " + fromAddress);
    }

    public static void main(String[] args)
    {
        new MailSender();
    }
}

This is the Code for send Mail with attachment

/* This code is used for send the mail to the any users.</div>
 * It is done by Java Mail Api.
 * By using this code we can send mail with out enter into your mail Account.
 * @author muneeswaran
 */
package com.mail;

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

public class SendMailUsingAuthentication {

    private String HOST_NAME = "gmail-smtp.l.google.com";
    String messageBody;

    public void postMail(String recipients[], String subject, String message,
            String from, String emailPassword, String[] files) throws MessagingException {
        boolean debug = false;
        java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

        //Set the host smtp address
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", HOST_NAME);
        props.put("mail.smtp.auth", "true");

        Authenticator authenticator = new SMTPAuthenticator(from, emailPassword);
        Session session = Session.getDefaultInstance(props, authenticator);

        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);

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

        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText(message);

        Multipart multipart = new MimeMultipart();

        //add the message body to the mime message
        multipart.addBodyPart(messageBodyPart);

        // add any file attachments to the message
        addAtachments(files, multipart);
        //Put all message parts in the message
        msg.setContent(multipart);
        Transport.send(msg);
        System.out.println("Sucessfully Sent mail to All Users");
    }

    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));
            attachmentBodyPart.setFileName(filename);
            //add the attachment
            multipart.addBodyPart(attachmentBodyPart);
        }
    }

    private class SMTPAuthenticator extends javax.mail.Authenticator {

        String username;
        String password;

        private SMTPAuthenticator(String authenticationUser, String authenticationPassword) {
            username = authenticationUser;
            password = authenticationPassword;
        }

        @Override
        public PasswordAuthentication getPasswordAuthentication() {

            return new PasswordAuthentication(username, password);
        }
    }
}