java邮件发送和群发邮件

java邮件发送

 

//邮件发送服务器

private static String HOST = "smtp.163.com";

//默认发送邮件 地址，用户名，密码
  private static String FROM = "****@163.com";

 private static String USERNAME = "*****";

 private static String PASSWORD = "****";

//发送都采用smtp

  TRANSPORT = "smtp";

 

// 邮件发送器
 public static boolean sysEmail(String link, String to) throws IOException {
  boolean success = false;
  try {

   Properties props = new Properties();

   props.put("mail.smtp.host", HOST);
   props.put("mail.smtp.auth", "true");

   Session mailSession = Session.getDefaultInstance(props, null);

   // MimeMessage message = new MimeMessage(session);
   mailSession.setDebug(true);

   Multipart mp = new MimeMultipart();
   MimeBodyPart mbp = new MimeBodyPart();
   // 将邮件内容以HTML的方式发送

   mbp.setContent(link, "text/html;charset=UTF-8");
   mp.addBodyPart(mbp);

   MimeMessage message = new MimeMessage(mailSession);
   message.setFrom(new InternetAddress(FROM));

   message.addRecipient(Message.RecipientType.TO, new InternetAddress(
     to));

   // message.addRecipients(Message.RecipientType.BCC, to);

   // System.out.println(props.getProperty(EMAIL_USERNAME));

   message.setSubject(EmailList.SUBJECT,"UTF-8");
   message.setContent(mp);
   message.saveChanges();

   Transport transport = mailSession.getTransport(TRANSPORT);
   transport.connect(HOST, USERNAME, PASSWORD);

   transport.sendMessage(message, message.getAllRecipients());
   transport.close();
   success = true;

  } catch (MessagingException e) {
   e.printStackTrace();
   success = false;
  }

  return success;
 }

 

 

 

 

群发的时候

message.addRecipients(Message.RecipientType.BCC, to);

to ="";邮件列表之间用逗号分割

可能发过多造成邮件发送不成功，此时考虑使用线程

 

 

有时候邮件显示发送成功，但在邮箱里边收不到，

有可能就是默认发送地址的问题，你把邮件默认发送地址改一下试试。