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Sending a POST Request Using a URL

import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.URL; import java.net.URLConnection; import java.net.URLEncoder; public class Main {   public static void main(String[] argv) throws Exception {     String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");     data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");     URL url = new URL("http://server.com:80/cgi");     URLConnection conn = url.openConnection();     conn.setDoOutput(true);     OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());     wr.write(data);     wr.flush();     BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));     String line;     while ((line = rd.readLine()) != null) {       System.out.println(line);     }     wr.close();     rd.close();   } }