Java tutorial
package org.sigmah.server.mail; /* * #%L * Sigmah * %% * Copyright (C) 2010 - 2016 URD * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/gpl-3.0.html>. * #L% */ import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.DataSource; import javax.mail.Message; import javax.mail.MessagingException; 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 javax.mail.util.ByteArrayDataSource; import org.apache.commons.lang3.ArrayUtils; import org.apache.commons.mail.EmailException; import org.apache.commons.mail.SimpleEmail; import org.sigmah.shared.util.FileType; /** * Implementation of the mail sender using the Apache Commons library. * * @author Maxime Lombard (mlombard@ideia.fr) * @author Raphal Calabro (rcalabro@ideia.fr) */ public class MailSenderImpl implements MailSender { private static final String MAIL_TRANSPORT_PROTOCOL = "mail.transport.protocol"; private static final String MAIL_SMTP_HOST = "mail.smtp.host"; private static final String MAIL_SMTP_PORT = "mail.smtp.port"; private static final String TRANSPORT_PROTOCOL = "smtp"; /** * {@inheritDoc} */ @Override public void send(final Email email) throws EmailException { if (email == null || ArrayUtils.isEmpty(email.getToAddresses())) { // does nothing. throw new EmailException("Email object null or invalid."); } // Simple email. final SimpleEmail simpleEmail = new SimpleEmail(); // Mail content parameters. simpleEmail.setFrom(email.getFromAddress(), email.getFromName()); for (final String address : email.getToAddresses()) { simpleEmail.addTo(address); } if (ArrayUtils.isNotEmpty(email.getCcAddresses())) { for (final String address : email.getCcAddresses()) { simpleEmail.addCc(address); } } simpleEmail.setSubject(email.getSubject()); simpleEmail.setContent(email.getContent(), email.getContentType()); // Mail sending parameters. simpleEmail.setCharset(email.getEncoding()); simpleEmail.setHostName(email.getHostName()); simpleEmail.setSmtpPort(email.getSmtpPort()); // Authentication is needed. final String userName = email.getAuthenticationUserName(); final String password = email.getAuthenticationPassword(); if (userName != null && password != null) { simpleEmail.setAuthentication(userName, password); } // Sends the mail. simpleEmail.send(); } @Override public void sendFile(Email email, String fileName, InputStream fileStream) throws EmailException { final String user = email.getAuthenticationUserName(); final String password = email.getAuthenticationPassword(); final Properties properties = new Properties(); properties.setProperty(MAIL_TRANSPORT_PROTOCOL, TRANSPORT_PROTOCOL); properties.setProperty(MAIL_SMTP_HOST, email.getHostName()); properties.setProperty(MAIL_SMTP_PORT, Integer.toString(email.getSmtpPort())); final StringBuilder toBuilder = new StringBuilder(); for (final String to : email.getToAddresses()) { if (toBuilder.length() > 0) { toBuilder.append(','); } toBuilder.append(to); } final StringBuilder ccBuilder = new StringBuilder(); if (email.getCcAddresses().length > 0) { for (final String cc : email.getCcAddresses()) { if (ccBuilder.length() > 0) { ccBuilder.append(','); } ccBuilder.append(cc); } } final Session session = javax.mail.Session.getInstance(properties); try { final DataSource attachment = new ByteArrayDataSource(fileStream, FileType.fromExtension(FileType.getExtension(fileName), FileType._DEFAULT).getContentType()); final Transport transport = session.getTransport(); if (password != null) { transport.connect(user, password); } else { transport.connect(); } final MimeMessage message = new MimeMessage(session); // Configures the headers. message.setFrom(new InternetAddress(email.getFromAddress(), false)); message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toBuilder.toString(), false)); if (email.getCcAddresses().length > 0) { message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(ccBuilder.toString(), false)); } message.setSubject(email.getSubject(), email.getEncoding()); // Html body part. final MimeMultipart textMultipart = new MimeMultipart("alternative"); final MimeBodyPart htmlBodyPart = new MimeBodyPart(); htmlBodyPart.setContent(email.getContent(), "text/html; charset=\"" + email.getEncoding() + "\""); textMultipart.addBodyPart(htmlBodyPart); final MimeBodyPart textBodyPart = new MimeBodyPart(); textBodyPart.setContent(textMultipart); // Attachment body part. final MimeBodyPart attachmentPart = new MimeBodyPart(); attachmentPart.setDataHandler(new DataHandler(attachment)); attachmentPart.setFileName(fileName); attachmentPart.setDescription(fileName); // Mail multipart content. final MimeMultipart contentMultipart = new MimeMultipart("related"); contentMultipart.addBodyPart(textBodyPart); contentMultipart.addBodyPart(attachmentPart); message.setContent(contentMultipart); message.saveChanges(); // Sends the mail. transport.sendMessage(message, message.getAllRecipients()); } catch (UnsupportedEncodingException ex) { throw new EmailException( "An error occured while encoding the mail content to '" + email.getEncoding() + "'.", ex); } catch (IOException ex) { throw new EmailException("An error occured while reading the attachment of an email.", ex); } catch (MessagingException ex) { throw new EmailException("An error occured while sending an email.", ex); } } }