How to send HTTP POST Request with xml header In Java?

[shiko]

I made use of this link to send an HTTP POST Request,

http://www.xyzws.com/Javafaq/how-to-use-httpurlconnecti on-post-data-to-web-server/139

now i need to add an xml header to my request, how can i do that?
header will look like:
<header ver="3.3.0">
<client>
<id>le</id>
<pwd>123456</pwd>
</client>
</header>