Interface/enum listing standard mime-type constants

Question

I am looking among the standard libraries (like apache commons, jax, jboss, javax) for an interface or enum that lists the values of all the standard mime-type (aka content-

Answer 1

Java 7 to the rescue!

You can either pass the file or the file name and it will return the MIME type.

String mimeType = MimetypesFileTypeMap
    .getDefaultFileTypeMap()
    .getContentType(attachment.getFileName());

http://docs.oracle.com/javase/7/docs/api/javax/activation/MimetypesFileTypeMap.html