javamail使用筆記

本文描述了3個常見的javamail問題，至於其它問題可以看javamail的例子
1：怎樣發送認證郵件

不想以前那樣，很多smtp服務器已經不能隨便讓你通過它發信，你必須提供用戶名和密碼才能發信，下面的示例演示了這樣的一種情況。


import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
public class MailExample {
public static void main (String args[]) throws Exception ,MessagingException{
String host = "smtp.263.net";
String from = "[email protected]";
String to = "[email protected]";


// Get system properties
Properties props = System.getProperties();

// Setup mail server
props.put("mail.smtp.host", host);

props.put("mail.smtp.auth","true");

// Get session
Session session = Session.getDefaultInstance(props, null);

// Define message
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(to));
message.setSubject("Hello JavaMail");
message.setText("Welcome to JavaMail");
message.saveChanges();

// Send message
Transport transport = session.getTransport("smtp");
transport.connect(host, "zong_feng","111111");
transport.sendMessage(message, message.getAllRecipients());
}
}


2:發送附件

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

public class sendfile {

public static void main(String[] args) {


String to = "[email protected]";
String from = "[email protected]";
String host = "smtp.263.net";
String filename = args[0];
//boolean debug = Boolean.valueOf(args[4]).booleanValue();
String msgText1 = "宗鋒.n";
String subject = "Sending a file";

// create some properties and get the default Session
Properties props = System.getProperties();
props.put("mail.smtp.host", host);

props.put("mail.smtp.auth","true");

Session session = Session.getDefaultInstance(props, null);
session.setDebug(true);

try {
// create a message
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject);

// create and fill the first message part
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(msgText1);

// create the second message part
MimeBodyPart mbp2 = new MimeBodyPart();

// attach the file to the message
FileDataSource fds = new FileDataSource(filename);
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());

// create the Multipart and its parts to it
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);

// add the Multipart to the message
msg.setContent(mp);

// set the Date: header
msg.setSentDate(new Date());

// send the message

Transport transport = session.getTransport("smtp");
transport.connect(host, "zong_feng","dsf");
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
} catch (MessagingException mex) {
mex.printStackTrace();
Exception ex = null;
if ((ex = mex.getNextException()) != null) {
ex.printStackTrace();
}
}
}
}


3:怎樣是IMAP和POP3一起工作

Use different session objects (don't use the default). Get the session with Session.getInstance() instead of getDefaultInstance().