用Java转发电子邮件

我们可以在发送电子邮件时将收到的邮件转发给其他人。有许多javamail类用于将消息转发到目标资源。

用Java转发电子邮件的示例

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

public class ForwardMail{
 public static void main(String[] args)throws Exception {
  final String user="sonoojaiswal@srcmini02.com";//change accordingly
  final String password="xxxxx";//change accordingly


  //get the session object
  Properties props = new Properties();
  props.put("mail.smtp.host", "mail.srcmini02.com");
  props.put("mail.smtp.auth", "true");

  Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
	protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(user, password);
	}
  });
 
		
  // Get a Store object and connect to the current host 
  Store store = session.getStore("pop3");
  store.connect("mail.srcmini02.com", user, password);

  //Create a Folder object and open the folder
  Folder folder = store.getFolder("inbox");
  folder.open(Folder.READ_ONLY);
  
  Message message = folder.getMessage(1);

  // Get all the information from the message
  String from = InternetAddress.toString(message.getFrom());
  if (from != null) {
  System.out.println("From: " + from);
  }
  String replyTo = InternetAddress.toString(
  message.getReplyTo());
  if (replyTo != null) {
  System.out.println("Reply-to: " + replyTo);
  }
  String to = InternetAddress.toString(
  message.getRecipients(Message.RecipientType.TO));
  if (to != null) {
  System.out.println("To: " + to);
  }

  String subject = message.getSubject();
  if (subject != null) {
  System.out.println("Subject: " + subject);
  }
  Date sent = message.getSentDate();
  if (sent != null) {
  System.out.println("Sent: " + sent);
  }
  System.out.println(message.getContent());

  // compose the message to forward
  Message message2 = new MimeMessage(session);
  message2.setSubject("Fwd: " + message.getSubject());
  message2.setFrom(new InternetAddress(from));
  message2.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

  // Create your new message part
  BodyPart messageBodyPart = new MimeBodyPart();
  messageBodyPart.setText("Oiginal message:\n\n");

  // Create a multi-part to combine the parts
  Multipart multipart = new MimeMultipart();
  multipart.addBodyPart(messageBodyPart);

  // Create and fill part for the forwarded content
  messageBodyPart = new MimeBodyPart();
  messageBodyPart.setDataHandler(message.getDataHandler());

  // Add part to multi part
  multipart.addBodyPart(messageBodyPart);

  // Associate multi-part with message
  message2.setContent(multipart);

  // Send message
  Transport.send(message2);

  System.out.println("message forwarded ....");
  }
}

如上例所示, 我们能够将电子邮件转发到目标资源。现在通过以下方式运行该程序：