私は Java でメールを送信しようとしています。Google で検索したところ、いくつかのコードが見つかり、それを実行しようとしましたが、次の例外が発生しました。
javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587;
nested exception is:
java.net.ConnectException: Connection timed out: connect
これが私のコードです：
public class SendMail {
public static void Send(String username, String email) {
Properties props = System.getProperties();
props.put("mail.smtp.starttls.enable", true); // added this line
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.user", "username@gmail.com");
props.put("mail.smtp.password", "password");
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", true);
Session session = Session.getInstance(props, null);
MimeMessage message = new MimeMessage(session);
System.out.println("Port: " + session.getProperty("mail.smtp.port"));
try {
InternetAddress from = new InternetAddress("username");
message.setSubject("Yes we can");
message.setFrom(from);
message.addRecipients(Message.RecipientType.TO, InternetAddress.parse(email));
Multipart multipart = new MimeMultipart("alternative");
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("your username :" + username);
multipart.addBodyPart(messageBodyPart);
messageBodyPart = new MimeBodyPart();
String htmlMessage = "Our html text";
messageBodyPart.setContent(htmlMessage, "text/html");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com", "username@gmail.com", "password");
System.out.println("Transport: " + transport.toString());
transport.sendMessage(message, message.getAllRecipients());
} catch (AddressException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}