此程序尝试发送电子邮件但抛出运行时异常：
javax.mail.AuthenticationFailedException: Failed to connect,no password specified?
当我提供正确的用户名和密码进行身份验证时,为什么会收到此异常？
发件人和收件人都有g-mail帐户.发件人和收件人都有g-mail帐户.发件人已禁用两步验证过程.
这是代码：
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
class tester {
public static void main(String args[]) {
Properties props = new Properties();
props.put("mail.smtp.host","smtp.gmail.com");
props.put("mail.stmp.user","username");
//To use TLS
props.put("mail.smtp.auth","true");
props.put("mail.smtp.starttls.enable","true");
props.put("mail.smtp.password","password");
//To use SSL
props.put("mail.smtp.socketFactory.port","465");
props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth","true");
props.put("mail.smtp.port","465");
Session session = Session.getDefaultInstance( props,null);
String to = "me@gmail.com";
String from = "from@gmail.com";
String subject = "Testing...";
Message msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(from));
msg.setRecipient(Message.RecipientType.TO,new InternetAddress(to));
msg.setSubject(subject);
msg.setText("Working fine..!");
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com",465,"username","password");
transport.send(msg);
System.out.println("fine!!");
}
catch(Exception exc) {
System.out.println(exc);
}
}
}
即使提供密码,我也得到例外.为什么不认证？
解决方法
尝试创建一个javax.mail.Authenticator对象,并将该属性对象发送到Session对象.
您可以修改此接受用户名和密码,您可以将它们存储在那里,或者您想要的地方.
public class SmtpAuthenticator extends Authenticator {
public SmtpAuthenticator() {
super();
}
@Override
public PasswordAuthentication getPasswordAuthentication() {
String username = "user";
String password = "password";
if ((username != null) && (username.length() > 0) && (password != null)
&& (password.length () > 0)) {
return new PasswordAuthentication(username,password);
}
return null;
}
在您发送电子邮件的课程中：
SmtpAuthenticator authentication = new SmtpAuthenticator();
javax.mail.Message msg = new MimeMessage(Session
.getDefaultInstance(emailProperties,authenticator));
