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POSTing data to an HTTP server

import java.io.DataInputStream; import java.io.DataOutputStream; import java.net.URL; import java.net.URLConnection; public class Main {   public static void main(String[] args) throws Exception {     URL url = new URL("http://localhost:8080/postedresults.jsp");     URLConnection conn = url.openConnection();     conn.setDoInput(true);     conn.setDoOutput(true);     conn.setUseCaches(false);     conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");     DataOutputStream out = new DataOutputStream(conn.getOutputStream());     String content = "CONTENT=HELLO JSP !&ONEMORECONTENT =HELLO POST !";     out.writeBytes(content);     out.flush();     out.close();     DataInputStream in = new DataInputStream(conn.getInputStream());     String str;     while (null != ((str = in.readUTF()))) {       System.out.println(str );     }     in.close();   } }