java邮件发送和群发邮件

java邮件发送

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//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";

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// 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;
?}

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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

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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。

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