使用java发送邮件

先上代码，稍后解释

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/**
 * Send e-mail using 163 mail
 * 
 * @param hardInfo
 * @throws AddressException
 * @throws MessagingException
 * @throws IOException
 */
public static void sendEmail()
		throws AddressException, MessagingException, IOException {
	Properties props = new Properties();
	props.setProperty("mail.host", "smtp.126.com"); // Set email protocol, 'cause I use 163 mail
	props.setProperty("mail.smtp.auth", "true");	// If do verification

	Authenticator auth = new Authenticator() {
		@Override
		protected PasswordAuthentication getPasswordAuthentication() {
			return new PasswordAuthentication("Mail Username", "Password");
		}
	};
	Session session = Session.getInstance(props, auth);

	MimeMessage msg = new MimeMessage(session);
	msg.setFrom(new InternetAddress("EmailAddress"));
	msg.setRecipients(RecipientType.TO, "receive user");

	msg.setSubject("Mail Subject");

	MimeMultipart list = new MimeMultipart();
	MimeBodyPart part1 = new MimeBodyPart();

	part1.setContent("Mail Message body", "Code style, for example text/html;charset=utf-8"); // You should write "<br>" when you use text/html 

	list.addBodyPart(part1);
	MimeBodyPart part2 = new MimeBodyPart();
	part2.attachFile("filepathname"); // Set Attach file
	list.addBodyPart(part2); // Add attach file 
	msg.setContent(list);
	Transport transport = session.getTransport("smtp"); // Set protocol
	transport.connect("From address", "Mail authorization code ");
	transport.sendMessage(msg, msg.getAllRecipients());
}

解释

  1. 发送基本上就是这样发送的，因为我们使用的smtp协议，网易邮箱为了保证一些方面的安全性，现在开启smtp使用协议必须要获取授权码，添加授权码的地方在倒数第二行。
  2. 邮件的内容使用字符串，如果你后面写的文本格式是 text/html 的话，如果要进行正文换行的话，需要使用html中的换行符号<br>来进行换行
  3. 在一开始一定要写上使用的邮箱协议，否则会出现连接失败