Javamail,编写简单的程序发送邮件

代码：

package com.dai.mail;

import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
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;

public class HtmlMessageSender {
    String protocol = "smtp";
    String from = "[e-mail]";
    String to = "[e-mail]";
    String subject = "test";
    String body = "<a href=http://www.renren.com> " +
            "welcome to our website!</a>"  +
                    "this is a test mail from sina!";
    /**
     * create session and the session has been setted particular properties
     * @return
     */
    public Session createSession() {
        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", protocol);
        /*必须将mail.smtp.auth属性设置为true，SMTPTransport对象才会向SMTP服务器提交认证
         * 信息，这个信息可以从JavaMail的javadocs文档中的com.sun.mail.smtp包的帮助文档中
         * 看到*/
        props.setProperty("mail.smtp.auth", "true");
        Session session = Session.getInstance(props);
        session.setDebug(true);
        return session;
    }
    /**
     * create MimeMessage,used the MultiBodyPart and MimeBodyPart
     * @param session
     * @return
     * @throws Exception
     */
    public MimeMessage createMessage(Session session) throws Exception {
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
        message.setSubject(subject);
       
        MimeMultipart multiPart = new MimeMultipart("related");
       
        MimeBodyPart htmlBodyPart = new MimeBodyPart();
        htmlBodyPart.setContent(body,"text/html;charset = GBK");
        multiPart.addBodyPart(htmlBodyPart);
       
        MimeBodyPart gifBodyPart = new MimeBodyPart();
        FileDataSource fds = new FileDataSource("d://zzz//love.jpg");
        gifBodyPart.setDataHandler(new DataHandler(fds));
        gifBodyPart.setContentID("love_jpg");
        multiPart.addBodyPart(gifBodyPart);
        message.setContent(multiPart);
        message.saveChanges();
        return message;
    }
    public static void main(String[] args) throws Exception {
        String server = "smtp.sina.com.cn";
        String user = "[e-mail]";
        String pass = "XXX";//密码
       
        HtmlMessageSender sender = new HtmlMessageSender();
        Session session = sender.createSession();
        MimeMessage message = sender.createMessage(session);
       
        //获取Transport对象，并连接邮件服务器发送邮件
        Transport transport =  session.getTransport();
        transport.connect(server, user, pass);
        transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
        transport.close();
       
    }
   
   
   
   
   
}