java - java/servlet中发送邮件出错

Question

我正在尝试使用java发送电子邮件。但我遇到如下错误

javax.mail.AuthenticationFailedException: failed to connect, no password specified

当我通过正确的电子邮件 ID 和密码进行身份验证时，为什么会收到此错误？

这是我的代码

import java.io.IOException;
import java.net.PasswordAuthentication;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class TestMail
 */
@WebServlet("/TestMail")
public class TestMail extends HttpServlet {
    private static final long serialVersionUID = 1L;


    public TestMail() {
        super();

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        todo(request,response);

    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        todo(request,response);

    }

    private void todo(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        request.setCharacterEncoding("utf8");
        response.setCharacterEncoding("utf8");

        Properties props = new Properties();
        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.post","587");



        Session session = Session.getDefaultInstance(props,
                new Authenticator() {
                    protected PasswordAuthentication  getPasswordAuthentication() {
                    return new PasswordAuthentication(
                                "testing@gmail.com", "testing123");
                            }
                });

        Message message=new MimeMessage(session);
        try {
            message.setFrom(new InternetAddress("testing@gmail.com","hello"));

        message.setRecipients(Message.RecipientType.TO,InternetAddress.parse("testing@gmail.com"));
        message.setSubject("Testing Email");
        message.setText("hello this is testing mail \n \n Congrets");
        Transport.send(message);
        System.out.println("Mail Sent Successfully");
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

Answer 1

JavaMail Authenticator 位于 javax.mail 包中，与同名的 java.net 类不同。两者不共享相同的身份 validator ，因为 JavaMail API 与 Java 1.1 一起使用，而 Java 1.1 没有 java.net 变体。

引用这个: http://www.rgagnon.com/javadetails/java-0538.html