Exception Javamail由于身份验证异常而失败，为什么？

我在一个JavaEE网络应用程序中工作，我希望向我的客户发送电子邮件。 因此，我添加了mail.jar和activation.jar，并尝试了以下简单代码：

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class SendHTML {

static Properties mailServerProperties;
static Session getMailSession;
static MimeMessage generateMailMessage;

public static void main(String args[]) throws AddressException, MessagingException {
    generateAndSendEmail();
    System.out.println("\n\n ===> Your Java Program has just sent an Email successfully. Check your email..");
}

public static void generateAndSendEmail() throws AddressException, MessagingException {

//Step1    
    System.out.println("\n 1st ===> setup Mail Server Properties..");
    mailServerProperties = System.getProperties();
    mailServerProperties.put("mail.smtp.port", "587"); // TLS Port
    mailServerProperties.put("mail.smtp.auth", "true"); // Enable Authentication
    mailServerProperties.put("mail.smtp.starttls.enable", "true"); // Enable StartTLS
    System.out.println("Mail Server Properties have been setup successfully..");

//Step2    
    System.out.println("\n\n 2nd ===> get Mail Session..");
    getMailSession = Session.getDefaultInstance(mailServerProperties, null);
    generateMailMessage = new MimeMessage(getMailSession);
    generateMailMessage.addRecipient(Message.RecipientType.TO, new InternetAddress("Recipient@gmail.com"));
    generateMailMessage.addRecipient(Message.RecipientType.CC, new InternetAddress("Recipient@gmail.com"));
    generateMailMessage.setSubject("Greetings from me..");
    String emailBody = "Test email by me JavaMail API example. " + "<br><br> Regards, <br>Admin";
    generateMailMessage.setContent(emailBody, "text/html");
    System.out.println("Mail Session has been created successfully..");

//Step3    
    System.out.println("\n\n 3rd ===> Get Session and Send mail");
    Transport transport = getMailSession.getTransport("smtp");
    // Enter your correct gmail UserID and Password
    transport.connect("smtp.gmail.com", "myusername@gmail.com", "mypassword");
    transport.sendMessage(generateMailMessage, generateMailMessage.getAllRecipients());
    transport.close();
}
}

有人能帮我解决这个问题吗？

首先，你的意思是“JavaEE”

如果您使用的是JavaEE，那么就不需要mail.jar和activation.jar，它们已经是每个JavaEE服务器的一部分了

您需要在和上阅读这些JavaMail常见问题解答条目

AuthenticationFailedException表示服务器不喜欢您的用户名和密码。 您可能遇到了所描述的问题

1st ===> setup Mail Server Properties..
Mail Server Properties have been setup successfully..
2nd ===> get Mail Session..
Mail Session has been created successfully..
3rd ===> Get Session and Send mail
Exception in thread "main" javax.mail.AuthenticationFailedException
at javax.mail.Service.connect(Service.java:264)
at javax.mail.Service.connect(Service.java:134)
at entity.SendHTML.generateAndSendEmail(SendHTML.java:53)
at entity.SendHTML.main(SendHTML.java:24)