使用GMail帐户发送电子邮件

3 回答

• 0

  代码是自解释的，这是我在项目中使用的工作代码 . 希望这可以帮到你 . 祝好运 .

  /**
   GmailSmtpSSL emailNotify = new GmailSmtpSSL(cred[ID], cred[PASS]);
  
   emailNotify.sendMailTo("self","Testing AlfaDX Gmail module", "Yes it works");
  
  **/
  
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Properties;
  
  import javax.mail.Authenticator;
  import javax.mail.Message;
  import javax.mail.MessagingException;
  import javax.mail.PasswordAuthentication;
  import javax.mail.Session;
  import javax.mail.Transport;
  import javax.mail.internet.InternetAddress;
  import javax.mail.internet.MimeMessage;
  
  public class GmailSmtpSSL {
  
      GmailSmtpSSL(String username,String password) {
          usern = username;
          pass  = password;
  
          setDebugMsg("Setting user name to : "+usern);
          setDebugMsg("Using given password : "+pass);
  
          props = new Properties();
          setDebugMsg("Setting smtp server: smtp.gmail.com");
          setDebugMsg("Using SSL at port 465 auth enabled");
  
          props.put("mail.smtp.host", "smtp.gmail.com");
          props.put("mail.smtp.port", "465");
          props.put("mail.smtp.user", usern);
  
          props.put("mail.smtp.auth", "true");
          props.put("mail.smtp.starttls.enable", "true");
          //props.put("mail.smtp.debug", "true");
  
          props.put("mail.smtp.socketFactory.port", "465");
          props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
          props.put("mail.smtp.socketFactory.fallback", "false");
  
          SMTPAuthenticator auth = new SMTPAuthenticator();
          session = Session.getDefaultInstance(props, auth);
          session.setDebug(true);
          setDebugMsg("Session initialization complete");
      }
  
      public void destroy() {
          props.clear();
          props = null;
          usern = null;
          pass  = null;
          session = null;
  
      }
  
      public void sendMailTo(String to, String sub, String body)
                                                      throws MessagingException {
  
           Calendar currentDate = Calendar.getInstance();
           SimpleDateFormat formatter= new SimpleDateFormat("yyyy-MMM-dd HH:mm:ss a"); 
           String dateToday = formatter.format(currentDate.getTime()).toLowerCase();
  
           if (to.equals("self")) 
               to = usern;
  
           setDebugMsg("Composing message: To "+to);
           setDebugMsg("Composing message: Subject "+sub);
  
           try {
               Message message = new MimeMessage(session);
               message.setFrom(new InternetAddress(usern));
               message.setRecipients(Message.RecipientType.TO, 
                                                      InternetAddress.parse(to));
               message.setSubject("PinguBot: "+dateToday+" "+sub);
               message.setText(body);
               setDebugMsg("Attempting to send...");
               Transport transport = session.getTransport("smtps");
  
               transport.connect("smtp.gmail.com", 465, usern, pass);
               Transport.send(message);
               transport.close();
           }
  
           catch(MessagingException me) {
               setDebugMsg(me.toString());
               throw new MessagingException(me.toString());
           }
               setDebugMsg("Mail was send successfully");
      }
  
  
      public String getDebugMsg() {
          String msg = new String(debugMsg);
          debugMsg = " ";
          return msg;
      }
      private static void setDebugMsg(String msg) {
          debugMsg += msg + "\n";
          System.out.println(msg);
      }
  
      private static String debugMsg = "";
      private String usern; 
      private String pass;
      private Session session;
      private static Properties props;
  
      private class SMTPAuthenticator extends Authenticator
      {
          public PasswordAuthentication getPasswordAuthentication()
          {
              return new PasswordAuthentication(usern, pass);
          }
      }
  
  }
  

  回复于 2024-05-03T15:43:51+08:00
• 1

  当我使用端口号-1时

  不足为奇 . -1不是有效的端口号 . 使用正确的端口号时会发生什么？

  当我使用端口号465

  这也不是标准的SMTP端口 .

  使用正确的端口号时会发生什么？

  回复于 2024-05-03T15:43:51+08:00
• 0

  使用以下代码验证并使用 javax.mail 将邮件发送到Gmail服务器 . 处理防火墙和您选择的主机端口 .

  import java.util.logging.Level;
  import java.util.logging.Logger;
  import javax.mail.*;
  import javax.mail.internet.*;
  import java.util.*;
  
  final class MailClient
  {
      private class SMTPAuthenticator extends Authenticator
      {
          private PasswordAuthentication authentication;
  
          public SMTPAuthenticator(String login, String password)
          {
               authentication = new PasswordAuthentication(login, password);
          }
  
          @Override
          protected PasswordAuthentication getPasswordAuthentication()
          {
               return authentication;
          }
      }
  
      public void mail()
      {
          try
          {
              String from = "xyz.com";
              String to = "abc.com";
              String subject = "Your Subject.";
              String message = "Message Text.";
              String login = "xyz.com";
              String password = "password";
  
              Properties props = new Properties();
              props.setProperty("mail.host", "smtp.gmail.com");
              props.setProperty("mail.smtp.port", "587");
              props.setProperty("mail.smtp.auth", "true");
              props.setProperty("mail.smtp.starttls.enable", "true");
  
              Authenticator auth = new SMTPAuthenticator(login, password);
  
              Session session = Session.getInstance(props, auth);
  
              MimeMessage msg = new MimeMessage(session);
  
             try
             {
                  msg.setText(message);
                  msg.setSubject(subject);
                  msg.setFrom(new InternetAddress(from));
                  msg.addRecipient(Message.RecipientType.TO,
                  new InternetAddress(to));
                  Transport.send(msg);
             }
             catch (MessagingException ex)
             {
                  Logger.getLogger(MailClient.class.getName()).
                  log(Level.SEVERE, null, ex);
             }
          }
      }
  }
  
  final public class Main
  {
      public static void main(String...args)
      {
          new MailClient().mail();
      }
  }
  

  回复于 2024-05-03T15:43:51+08:00