从Java程序发送验证电子邮件

Question

我正在做一个学校项目，我试图在创建帐户时发送一封验证电子邮件，但我不断收到一个身份验证错误，即使我的凭据是正确的。

package classesMain;

import java.util.*;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class SendingEmail {

    private String email;
    private String code;
    
    
    public SendingEmail(String email, String code) {
        this.email = email;
        this.code = code;
        
    }
    
    
    public void send() {
        String fromEmail ="**MY EMAIL HERE**";
        String password="**MY PASSWORD HERE**";
        
        
        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.port", "587");
        
        
        Authenticator signOn = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(fromEmail,password);
            }
        };
        
        Session sess = Session.getInstance(props, signOn);
        
        
        
            MimeMessage message =  new MimeMessage(sess);
            try {
                message.setFrom(new InternetAddress(fromEmail));
                message.addRecipient(Message.RecipientType.TO, new InternetAddress(email));
                message.setSubject("Canadian Voting Portal- Email Verification Link");
                message.setText("Click on this link to verify your Canadian Voting Portal email."
                        + "If you did not request this email please call 1-888-888-8888"
                        + "\n\n Link: "+"http://localhost:8080/CapstoneProject/EmailServlet?email="+email+"&code="+code);
                
                Transport.send(message);
                
                System.out.println("Message Sent");
            } catch (MessagingException e) {
                // TODO Auto-generated catch block
                System.out.println("ERROR");
                e.printStackTrace();
            }
            
        
    }
}

错误日志：

MySQL JDBC Driver Registered!
Connection made to DB!
ERROR
javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at
535 5.7.8  https://support.google.com/mail/?p=BadCredentials bm35-20020a05620a19a300b006b61b2cb1d2sm57362qkb.46 - gsmtp

    at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:965)
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:876)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:780)
    at javax.mail.Service.connect(Service.java:388)
    at javax.mail.Service.connect(Service.java:246)
    at javax.mail.Service.connect(Service.java:195)
    at javax.mail.Transport.send0(Transport.java:254)
    at javax.mail.Transport.send(Transport.java:124)
    at classesMain.SendingEmail.send(SendingEmail.java:54)
    at servlets.CreateAccountServlet.doPost(CreateAccountServlet.java:103)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:834)

我尝试了几种不同的身份验证器，但似乎都不起作用！谢谢！

Answer 1

对于任何处于相同情况的人，我都会将我的电子邮件硬编码到密码验证器和电子邮件中。然后，我不得不为“Mail”和“Windows Computer”获取应用程序密码，无论出于何种原因，都必须对其进行硬编码，否则它将无法工作。。不知道为什么，但那是我的解决方案！谢谢