Java doPost HTML sending

I have a servlet doing this:

Code:

---

<form action="ACTION URL" method="post">
    <input type="text" name="id" style="width: 100%"></td>
    <input type="password" name="password" style="width: 100%"></td>
    <input type="image" src="/submit.gif" class="submitImage">
</form>

---

Indeed I need to do it inside my Java Application:
i mean i don't really need the servlet, if I can send this data from my application. I have basic knowledge about how a normal HTML response page is built, i would like to know if I have to send line by line all the headers and body, and how to include the 2 parameters i need.
Or, if there is some kind of function that can do that without having to manually insert all that stuff.

Thanks

Of course i mean I think I need the HTTP headers to send the reply, like if i were selling with Telnet... not sure...

Apache Jakarta Commons Http-Client