Java URL post
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import java.net.URL; import java.net.URLConnection; import java.util.Map; public class Main { public static String getURLContent(String urlStr, String input) { BufferedReader br = null;/*w w w.j a va 2s . com*/ BufferedWriter bw = null; try { URL url = new URL(urlStr); URLConnection connection = url.openConnection(); // call setDoOutput(true) to indicate that you will write // to the connection. By default, it is false. connection.setDoOutput(true); connection.connect(); OutputStream ous = connection.getOutputStream(); bw = new BufferedWriter(new OutputStreamWriter(ous)); bw.write(input); bw.flush(); bw.close(); printRequestHeaders(connection); InputStream ins = connection.getInputStream(); br = new BufferedReader(new InputStreamReader(ins)); StringBuilder sb = new StringBuilder(); String msg = null; while ((msg = br.readLine()) != null) { sb.append(msg); sb.append("\n"); // Append a new line } return sb.toString(); } catch (IOException e) { e.printStackTrace(); } finally { if (br != null) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } } // If we arrive here it means there was an error return null; } public static void printRequestHeaders(URLConnection connection) { Map headers = connection.getHeaderFields(); System.out.println("Request Headers are:"); System.out.println(headers); System.out.println(); } public static void main(String[] args) { String urlStr = "http://www.httpbin.org/post"; try { String content = getURLContent(urlStr, "asdf"); System.out.println("Returned data from the server is:"); System.out.println(content); } catch (Exception e) { e.printStackTrace(); } } }