Java Send Data Method Post / Get to URL (HttpURLConnection)

<?php
echo "Sawatdee : ".$_POST["name"]." ".$_POST["surname"];
?>

package com.java.myapp;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MyClass {

	public static void main(String[] args) {
		
		URL url;
		try {
	        url = new URL("http://localhost/myphp/url.php");
	        
	        String Name = "Weerachai";
	        String Surname = "Nukitram";
	        
	        String urlParameters = "name= " + Name + " &surname=" + Surname;
	        HttpURLConnection conn = (HttpURLConnection) url.openConnection();           
	        conn.setDoOutput(true);
	        conn.setDoInput(true);
	        conn.setInstanceFollowRedirects(false); 
	        conn.setRequestMethod("POST"); 
	        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
	        conn.setRequestProperty("charset", "utf-8");
	        conn.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.getBytes().length));
	        conn.setUseCaches (false);

	        DataOutputStream wr = new DataOutputStream(conn.getOutputStream ());
	        wr.writeBytes(urlParameters);
	        wr.flush();
	        wr.close();
	        
	        StringBuilder str = new StringBuilder();
	        String line;
	        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

			while ((line = reader.readLine()) != null) {
				str.append(line);
			}
	        
	        conn.disconnect();
	        
	        System.out.println(str.toString());
	        
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	        
	}
	
}