mime-mapping

A servlet may need to know which MIME type a file extension corresponds to , and such a mapping needs to be specified as follows..

<mime-mapping>
       <extension>txt</extension>
        <mime-type>text/html</mime-type>
</mime-mapping>

In the service/doGet/doPost methods, use the following code to determine the mimetype of the file

String mimeType=this.getServletContext().getMimeType("pathOfTheFile.txt");
response.setContentType(mimeType);