问题
I know this question was answered somewhere else but that didn't work for me so here i am.
Basically my code will login to your e-mail and send messages to multiple people.
of course its not done, i know that, but it has enough code to work because i based it off one of my command line programs that does the same thing.
anyways here is some code.
sender class :
public class Sender {
public static void send(JTextArea listRecepients, JTextField textSubject, JTextArea textBody, JTextField txtSMTP,
JTextField txtEmail, JPasswordField txtPassword, JCheckBox boxHtml, JSpinner ammountSpin, JSpinner timeSpin, JProgressBar progressBar) {
String subject = textSubject.getText();
String message = textBody.getText();
for (String line : listRecepients.getText().split("\\n")) setEmails(line, subject, message, txtSMTP, txtEmail, txtPassword, boxHtml, ammountSpin, timeSpin, progressBar);
}
private static void setEmails(String line, String subject, String message, JTextField txtSMTP,
JTextField txtEmail, JTextField txtPassword, JCheckBox boxHtml, JSpinner ammountSpin, JSpinner timeSpin, JProgressBar progressBar) {
List<String> emails = new ArrayList<String>(Arrays.asList(line));
sendEmail(subject, emails, message, txtSMTP, txtEmail, txtPassword, boxHtml, ammountSpin, timeSpin, progressBar);
}
public static void sendEmail(final String subject, final List<String> emailToAddresses,
final String emailBodyText, JTextField txtSMTP, JTextField txtEmail, JTextField txtPassword, JCheckBox boxHtml, JSpinner ammountSpin, JSpinner timeSpin, JProgressBar progressBar) {
final String username = txtEmail.getText();
final String password = txtPassword.getText();
final String smtpHost = txtSMTP.getText();
Properties props = new Properties();
// do not change - start
props.put("mail.smtp.user", "username");
props.put("mail.smtp.host", smtpHost);
// props.put("mail.debug", "true");
props.put("mail.smtp.auth", "true");
// do not change - end
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
String emails = null;
int ammount, time;
try {
ammountSpin.commitEdit();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
ammount = (int) ammountSpin.getValue();
try {
timeSpin.commitEdit();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
time = (int) timeSpin.getValue();
time = time*1000;
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(username));
message.setSubject(subject);
if (boxHtml.isSelected() == true){
String content = "<html>\n<body>\n";
content += emailBodyText + "\n";
content += "\n";
content += "</body>\n</html>";
message.setContent(content, "html");
}else{
String content = emailBodyText;
message.setContent(content, "text");
}
StringBuilder sb = new StringBuilder();
int i = 0;
for (String email : emailToAddresses) {
sb.append(email);
i++;
if (emailToAddresses.size() > i) {
sb.append(", ");
}
}
emails = sb.toString();
message.setRecipients(Message.RecipientType.BCC,
InternetAddress.parse(sb.toString()));
System.out.println("Sending Email to " + emails + " from "
+ username + " with Subject - " + subject);
for (int x = 0; x < ammount; x++){
Transport.send(message);
try {
Thread.sleep(time);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("Email successfully sent to " + emails);
} catch (MessagingException e) {
System.out.println("Email sending failed to " + emails);
failed(e);
}
}
public static void failed (MessagingException e){
JFrame frame = new JFrame("Failed to send");
JOptionPane.showMessageDialog(frame, "The Process has failed with exception code : "+ e, "Warning", JOptionPane.WARNING_MESSAGE);
}
}
and yes i know there are more efficient ways of doing this insted of sending the required fields through multiple methods but im lazy. thats why i came here :p
thanks for your help and lmk if you want the other 3 classes. but the error should be in this one.
回答1:
Replace message.setContent(content, "html") with message.setText(content, null, "html"). Replace message.setContent(content, "text") with message.setText(content).
回答2:
Bill's answer seem to cover it however it appears you are still stuck. One issue is that message.setContent(content, "text"); is going to set the content type to text/text when you want test/plain. Here is an example:
public class GMTCZ {
public static void main(String[] args) throws Exception, Exception {
MimeMessage mime = new MimeMessage((Session) null);
mime.setText("That was 1 arg setText");
print(mime);
String charset = MimeUtility.mimeCharset(MimeUtility.getDefaultJavaCharset());
mime.setText("<html><title>This is 3 arg setText</title></html>", charset, "html");
print(mime);
mime.setText("That was 3 arg setText.", charset, "plain");
print(mime);
//OR
Message msg = new MimeMessage((Session) null);
msg.setContent("<html><title>That was 2 arg setContent</title></html>", "text/html");
print(msg);
msg.setContent("That was 2 arg setContent.", "text/plain");
print(msg);
msg.setContent("<html><title>That was 2 arg setContent.</title></html>", "text/html");
print(msg);
}
private static void print(Message msg) throws Exception {
msg.saveChanges();
msg.writeTo(System.out);
System.out.println();
System.out.println("====");
}
}
回答3:
I figured it out, basically i changes the props.put values to this :
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", smtpHost);
props.put("mail.smtp.user", username);
props.put("mail.smtp.password", password);
props.put("mail.smtp.port", smtpPort);
props.put("mail.smtp.auth", "true");
and it worked. all i did was add the port. and i also made my gmail accout access untrusted apps.
来源：https://stackoverflow.com/questions/40985782/javax-mail-internet-parseexception-in-content-type-string-text-expected