Java开发技巧揭秘：实现邮件发送与接收功能

Properties properties = new Properties();
properties.setProperty("mail.smtp.host", "smtp.example.com");
properties.setProperty("mail.smtp.port", "25");
properties.setProperty("mail.smtp.auth", "true");

Session session = Session.getInstance(properties, new Authenticator() {
  protected PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication("username", "password");
  }
});

Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("sender@example.com"));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("recipient@example.com"));
message.setSubject("Hello");
message.setText("Hello, World!");

Transport.send(message);

Properties properties = new Properties();
properties.setProperty("mail.pop3.host", "pop.example.com");
properties.setProperty("mail.pop3.port", "995");
properties.setProperty("mail.pop3.starttls.enable", "true");

Session session = Session.getInstance(properties, new Authenticator() {
  protected PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication("username", "password");
  }
});

Store store = session.getStore("pop3");
store.connect();

Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);

Message[] messages = folder.getMessages();

folder.close(false);
store.close();