邮件收取

与其他邮箱不同的是Gmail提供的POP3和SMTP是使用安全套接字层SSL的，因此常规的JavaMail程序是无法收发邮件的，下面是使用JavaMail如何收取Gmail邮件以及发送邮件的代码：

1. 邮件收取

package lius.javamail.ssl;

import java.io.UnsupportedEncodingException;
import java.security.*;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeUtility;

/**
* 用于收取Gmail邮件
* @author Winter Lau
*/
public class GmailFetch {

public static void main(String argv[]) throws Exception {

   Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
   final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

   // Get a Properties object
   Properties props = System.getProperties();
   props.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);
   props.setProperty("mail.pop3.socketFactory.fallback", "false");
   props.setProperty("mail.pop3.port", "995");
   props.setProperty("mail.pop3.socketFactory.port", "995");

  //以下步骤跟一般的JavaMail操作相同
   Session session = Session.getDefaultInstance(props,null);

   //请将红色部分对应替换成你的邮箱帐号和密码
   URLName urln = new URLName("pop3","pop.gmail.com",995,null,
     "[邮箱帐号]", "[邮箱密码]");
   Store store = session.getStore(urln);
   Folder inbox = null;
   try {
    store.connect();
    inbox = store.getFolder("INBOX");
    inbox.open(Folder.READ_ONLY);
    FetchProfile profile = new FetchProfile();
    profile.add(FetchProfile.Item.ENVELOPE);
    Message[] messages = inbox.getMessages();
    inbox.fetch(messages, profile);
    System.out.println("收件箱的邮件数：" + messages.length);
    for (int i = 0; i < messages.length; i++) {
     //邮件发送者
     String from = decodeText(messages[i].getFrom()[0].toString());
     InternetAddress ia = new InternetAddress(from);
     System.out.println("FROM:" + ia.getPersonal()+'('+ia.getAddress()+')');
     //邮件标题
     System.out.println("TITLE:" + messages[i].getSubject());
     //邮件大小
     System.out.println("SIZE:" + messages[i].getSize());
     //邮件发送时间
     System.out.println("DATE:" + messages[i].getSentDate());
    }
   } finally {
    try {
     inbox.close(false);
    } catch (Exception e) {}
    try {
     store.close();
    } catch (Exception e) {}
   }
}

protected static String decodeText(String text)
    throws UnsupportedEncodingException {
   if (text == null)
    return null;
   if (text.startsWith("=?GB") || text.startsWith("=?gb"))
    text = MimeUtility.decodeText(text);
   else
    text = new String(text.getBytes("ISO8859_1"));
   return text;
}

}

2. 发送邮件

package lius.javamail.ssl;

import java.security.Security;
import java.util.Date;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
* 使用Gmail发送邮件
* @author Winter Lau
*/
public class GmailSender {

public static void main(String[] args) throws AddressException, MessagingException {
   Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
   final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
   // Get a Properties object
   Properties props = System.getProperties();
   props.setProperty("mail.smtp.host", "smtp.gmail.com");
   props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
   props.setProperty("mail.smtp.socketFactory.fallback", "false");
   props.setProperty("mail.smtp.port", "465");
   props.setProperty("mail.smtp.socketFactory.port", "465");
   props.put("mail.smtp.auth", "true");
   final String username = "[邮箱帐号]";
   final String password = "[邮箱密码]";
   Session session = Session.getDefaultInstance(props, new Authenticator(){
       protected PasswordAuthentication getPasswordAuthentication() {
           return new PasswordAuthentication(username, password);
       }});

        // -- Create a new message --
   Message msg = new MimeMessage(session);

   // -- Set the FROM and TO fields --
   msg.setFrom(new InternetAddress(username + "@mo168.com"));
   msg.setRecipients(Message.RecipientType.TO,
     InternetAddress.parse("[收件人地址]",false));
   msg.setSubject("Hello");
   msg.setText("How are you");
   msg.setSentDate(new Date());
   Transport.send(msg);
 
   System.out.println("Message sent.");
}
}

评论

2 楼 沙漠绿树 2009-05-22  

xiexie

1 楼 yyxsjl 2008-04-26  

很好哦，详细...