Question

我正在尝试从Servlet发送邮件。我有这样的代码，我收到了消息异常。 Stack Over Flow中还有许多其他类似的问题，但它们都没有帮助我。所以我又发了一遍。

string timeInput = Console.ReadLine();
if(timeInput.Length == 4) 
 { // if string = four
    timeInput = timeInput.Insert(2, ":");
 }
string[] timeSplit = timeInput.Split(':');

我的堆栈跟踪就像这样....

@WebServlet(name = "SendMail", urlPatterns = {"/SendMail"})
public class SendMail extends HttpServlet {
final String from = "teamwarrior20@gmail.com";
final String username = "teamwarrior20@gmail.com";
final String password = "iamfromnepal";
String to;
String subject;
String dataMessage;

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    to = req.getParameter("to");
    subject = req.getParameter("subject");
    dataMessage = req.getParameter("message");
    sendMail();
    req.getRequestDispatcher("successfullmail.jsp").forward(req, resp);
}

private void sendMail() {
    System.out.println(to);
    System.out.println(subject);
    System.out.println(dataMessage);
    Properties props = System.getProperties();

    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");

    Session session = Session.getInstance(props, new javax.mail.Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(from, password); //To change body of generated methods, choose Tools | Templates.
        }

    });
    try {
        Message message = new MimeMessage(session);

        message.setFrom(new InternetAddress(from));

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

        message.setSubject(subject);

        message.setText(dataMessage);

        Transport.send(message);

    } catch (Exception e) {
        e.printStackTrace();
    }

}

}

Answer 1

几个小时后，我通过添加

解决了这个问题

props.put("mail.smtp.user", username);;
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "465");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.debug", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.socketFactory.fallback", "false");

我也开启了不那么安全的应用程序 https://www.google.com/settings/security/lesssecureapps

Answer 2

更改代码中的两件事

而不是写

Properties props = System.getProperties();

将其更改为

Properties props = new Properties();

同时更改

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

到

message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse(to));

这解决了我的电脑问题。试一试，然后ping我。

Answer 3

我在gmail的属性中看到了问题。您可以尝试将此行添加到属性中：

props.put("mail.smtp.ssl.trust", "smtp.gmail.com");

为什么我得到javax.mail.MessagingException？

3 个答案: