Java Mail API - Encoding problems

Question

I\'m using Java Mail API and I\'m trying to send an email through Gmail\'s SMTP. How my program works: java.util.Scanner class is used to get user input - I\'m asking user f

Answer 1

The following worked for me:

MimeMessage message = ...
message.setSubject(subject, "UTF-8");
message.setContent(body, "text/plain; charset=UTF-8");

Where subject and body are regular String objects with no special treatment (code and user interface use UTF-8).

Answer 2

You should use setText(String text, String charset) or setText(String text, String charset, String subtype) to set the text body with a specific encoding.

MimeUtility.encodeText() is not meant for body text, but only for encoded text in headers (and then only for headers set with setHeader or addHeader).

Answer 3

1- Consider you want to send an email with this string in the body:

"Olá João!"

2 - As the code is running in the GAE server, this string is interpreted with the default ASCII encoding. To send this email with the correct accented characters, define the String as:

String body = "Ol\u00e1 Jo\u00e3o!";

The special characters are manually defined with its UTF-8 codes. Search the codes you need in the table http://www.utf8-chartable.de/

3- Convert the string encoding to UTF-8. All the codes manually typed will be now correctly interpreted:

Session session = Session.getDefaultInstance(props);
MimeMessage message = new MimeMessage(session);
String encodedSubject = new String (subject.getBytes("UTF-8"),"UTF-8");
String encodedBody = new String (body.getBytes("UTF-8"),"UTF-8");
message.setSubject(encodedSubject, "UTF-8");
message.setText(encodedBody, "UTF-8");

Answer 4

Basically, my code works just fine, as its supposed to. It was the cmd, that could not handle non-ascii letters. I used a bat file to access a jar. I think I'm just going to make a little GUI then... Thanks everyone for answering.

Answer 5

JavaMailSenderImpl emailSender = new JavaMailSenderImpl();
mailSender.setHost("...");

MimeMessage message = emailSender.createMimeMessage();
message.setSubject("...", "UTF-8");
message.setText("...", "UTF-8");

MimeMessageHelper helper = new MimeMessageHelper(message, "UTF-8");
helper.setFrom(from);
helper.setTo(to);

emailSender.send(message);

Answer 6

    MimeMessage message = new MimeMessage(session);
    message.setSubject(subject, "UTF-8");
    message.setText(body, "UTF-8");

So one has to set the character encoding for both, body and subject.

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Addendum because of comment of @bartac

For the corresponding MimeBodyPart do a setHeader("Content-Type", "text/plain; charset=UTF-8").