Yes, open URLConnection and write the POST request using code below from any web or stand-alone application.

	URL url = new URL("http://localhost/servlet/Target");

	UrlConnection urlConnection = url.openConnection();



	urlConnection.setDoInput(true);

	urlConnection.setDoOutput(true);

	urlConnection.setUseCaches(false);

	urlConnection.setRequestProperty("Content-Type", 

				   "application/x-www-form-urlencoded");



	// Send POST output.

	dos = new DataOutputStream(urlConnection.getOutputStream());



	String content = "arg1=" + URLEncoder.encode("name of the argument") 

	  + "&arg2=" + URLEncoder.encode("another name");



	dos.writeBytes(content);

	dos.flush();

Yes, but only in servlets

Yes, use <jsp:post> tag

No, POST requests cannot be sent from the server side

No, it?s impossible as there is no such classes in Servlet API

You can achieve mimic a browser only from Java servlet or Java applet providing code below:

	URL url = new URL("http://localhost/servlet/Target");

	UrlConnection urlConnection = url.openConnection();



	urlConnection.setDoInput(true);

	urlConnection.setDoOutput(true);

	urlConnection.setUseCaches(false);

	urlConnection.setRequestProperty("Content-Type", 

				   "application/x-www-form-urlencoded");



	// Send POST output.

	dos = new DataOutputStream(urlConnection.getOutputStream());



	String content = "arg1=" + URLEncoder.encode("name of the argument") 

	  + "&arg2=" + URLEncoder.encode("another name");



	dos.writeBytes(content);

	dos.flush();

Yes, create an instance of HttpServletRequest and call sendTo() method