java - Java程序中的邮件发送

Question

我正在使用以下代码通过 Java 程序发送电子邮件 (gmail)。我收到AuthenticationFailedException。我在下面提到了错误。如何解决这个问题？如何在此程序中使用发件人用户名、密码？

        package internet;

        import java.util.*;
        import javax.mail.*;
        import javax.mail.internet.*;
        import javax.activation.*;

        public class mail
        {
           public static void main(String [] args)
           {


              String to = "xxx@gmail.com";
              String from = "yyy@gmail.com";


              String host = "smtp.gmail.com";


              Properties properties = System.getProperties();


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



              Session session = Session.getDefaultInstance(properties);

              try{

                 MimeMessage message = new MimeMessage(session);


                 message.setFrom(new InternetAddress(from));


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


                 message.setSubject("This is the Subject Line!");


                 message.setText("This is actual message");


                 Transport.send(message);
                 System.out.println("hi");
                 System.out.println("Sent message successfully....");
              }catch (MessagingException mex) {
                 mex.printStackTrace();
              }
           }
        }

我收到以下错误

    javax.mail.AuthenticationFailedException
            at javax.mail.Service.connect(Service.java:267)
            at javax.mail.Service.connect(Service.java:137)
            at javax.mail.Service.connect(Service.java:86)
            at javax.mail.Transport.send0(Transport.java:150)
            at javax.mail.Transport.send(Transport.java:80)
            at internet.mail.main(mail.java:59)

Answer 1

您必须在t.sendMessage(消息、地址)之前通过t.connect(主机、用户、密码)提供您的登录凭据。 (首先使用 Transport t = session.getTransport("smtp") 获取 Transport 对象。