http request sample - java

DemoHttpRequest

import java.net.*;
import java.io.*;

public class DemoHttpRequest{
	
	public static void main(String[] args) {

 	try{

	   String payload="{\"jsonrpc\":\"2.0\",\"method\":\"changeDetail\",\"params\":[{\"id\":11376}],\"id\":2}";
	   String cliff = "{\"name\":\"cliff\"}";
	   URL url = new URL("http://localhost:3000/post");
	   HttpURLConnection conn = (HttpURLConnection)url.openConnection();
	   conn.setRequestMethod("POST");
	   conn.setDoInput(true);
	   conn.setDoOutput(true);
	   conn.setRequestProperty("Accept", "application/json");
           conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
	   DataOutputStream out = new DataOutputStream(conn.getOutputStream());

	   out.writeBytes(cliff);
	   out.flush();
	   out.close();	   
	   //character stream
	   BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
	   FileWriter fw = new FileWriter("./result.txt");

	   String inputLine;
	   StringBuffer content = new StringBuffer();

	   while ((inputLine = in.readLine()) != null) {
	   	
		   content.append(inputLine);

	   }
	  in.close();
	  conn.disconnect();
	
	  fw.write(content.toString());
	  System.out.println(content);
	  fw.close();
	} catch (IOException e) {
	    e.printStackTrace();

	}

	}
	

}