s="block">Called by the server (via the <code>service</code> method) to allow a servlet to handle a POST request.

 The HTTP POST method allows the client to send data of unlimited length to the Web server a single time and is useful
 when posting information such as credit card numbers.

 <p>
 When overriding this method, read the request data, write the response headers, get the response's writer or output
 stream object, and finally, write the response data. It's best to include content type and encoding