I have a trouble to read a content of MIME message

[Ta lion]

here my code :
import java.io.IOException;
import java.util.Properties;

import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import javax.servlet.http.*;

public class MailHandlerServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 5548406084688550825L;

public void doPost(HttpServletRequest req,
HttpServletResponse resp)
throws IOException {
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
try {
MimeMessage message = new MimeMessage(session, req.getInputStream());

} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

can anybody tell me how can i parse this message to String and read a content of this?
thank all