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 = "15829004147@sina.cn";     String to = "243047007@qq.com";     String subject = "test";     String body = " " +             "welcome to our website!"  +                     "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 = "15829004147@sina.cn";         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();             }                     }