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";
          }