Javax.activation.UnsupportedDataTypeException:

Question

I get the following exception when I extract mail.jar, activation.jar and run the program. However, no exception is thrown when I add the two jar file in the classpath.
How do I solve this problem?
THanks
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type mul
part/mixed;
        boundary="----=_Part_0_33536220.1272627745828"
        at javax.activation.ObjectDataContentHandler.writeTo(Unknown Source)
        at javax.activation.DataHandler.writeTo(Unknown Source)
        at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1381)
        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1742)
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:737)
        at SimpleSSLMail.test(SimpleSSLMail.java:77)
        at SimpleSSLMail.main(SimpleSSLMail.java:34)
javax.mail.MessagingException: IOException while sending message;
  nested exception is:
        javax.activation.UnsupportedDataTypeException: no object DCH for MIME
pe multipart/mixed;
        boundary="----=_Part_0_33536220.1272627745828"

Answer 1

sanksrit_source_language wrote:
Hi,
please add the following lines in your code.
// add handlers for main MIME types
               MailcapCommandMap mc = (MailcapCommandMap)CommandMap.getDefaultCommandMap();
               mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
               mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
               mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
               mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
               mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
               CommandMap.setDefaultCommandMap(mc);
This just solved my problemAs those handlers are already defined in the mailcap file supplied with JavaMail, that is totally useless advice. It is a clear indication your are not using the libraries in the right way.