URL call with input form data

Question

Hi experts,
I need to call a URL with POST request and need send the form input data with request, how can i modify below code to get that done, i tried to find API and falied to find so.,
Lets assume i want to send "MessageId" and "MessageType" as in POST method, rather than sending in QueryString.
public class TestURL{
static public void main(String args[]) throws Exception{
URL url = new URL("http://www.myurl.com/myMessageHanlerservlet");
URLConnection conn = url.openConnection();
//Need help here to add my input paras
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
//how to set MessageId and MessageType
InputStreamReader content
= new InputStreamReader(conn.getInputStream());
for (int i=0; i != -1; i = content.read())
System.out.print((char) i);
Thanks
Jay

Answer 1

Try this code, it comes from javaalmanac.
    try {
        // Construct data
        String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
        data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");
        // Send data
        URL url = new URL("http://www.myurl.com/myMessageHanlerservlet");
        URLConnection conn = url.openConnection();
        conn.setDoOutput(true);
        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(data);
        wr.flush();
        // Get the response
        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = rd.readLine()) != null) {
            // Process line...
        wr.close();
        rd.close();
    } catch (Exception e) {
    }