java实现向邮件发送消息

• 发送邮件的方法

  /**     * 发送邮件     * @param user 发件人邮箱     * @param password 授权码（注意不是邮箱登录密码）     * @param host      * @param from 发件人     * @param to 接收者邮箱     * @param subject 邮件主题     * @param content 邮件内容（可以是字符串也可以是HTML格式）     * @return success 发送成功 failure 发送失败     * @throws Exception     */    public static String sendMail(String user, String password, String host,            String from, String to, String subject, String content) {        if (to != null){            try {            Properties props = System.getProperties();            props.put("mail.smtp.host", host);            props.put("mail.smtp.auth", "true");            MailAuthenticator auth = new MailAuthenticator();            MailAuthenticator.USERNAME = user;            MailAuthenticator.PASSWORD = password;            Session session = Session.getInstance(props, auth);            session.setDebug(true);                MimeMessage message = new MimeMessage(session);                message.setFrom(new InternetAddress(from));                if (!to.trim().equals("")){                     message.addRecipient(Message.RecipientType.TO,                             new InternetAddress(to.trim()));                }                message.setSubject(subject);                MimeBodyPart mbp1 = new MimeBodyPart(); // 正文                mbp1.setContent(content, "text/html;charset=utf-8");                Multipart mp = new MimeMultipart(); // 整个邮件：正文+附件                mp.addBodyPart(mbp1);                // mp.addBodyPart(mbp2);                message.setContent(mp);                message.setSentDate(new Date());                message.saveChanges();                Transport.send(message);            } catch (Exception e){                e.printStackTrace();                return "failure";            }            return "success";        }else{                        return "failure";        }