curl -s -X POST \
  http://localhost:4000 \
  -H "authorization: Bearer token" \
  -H "content-type: application/json" \
  -d '{
	"fcn":"fcn",
	"args":["a","b"]
}'

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;

class TempController {
	def send(){
		String body = '{"fcn":"fcn","args":["a","b"]}'
		String auth = "Bearer token"
		String urlParameters  = body;
		byte[] postData = urlParameters.getBytes( StandardCharsets.UTF_8 );
		int postDataLength = postData.length;
		String checkurl = "http://localhost:4000";
		try{
			URL connectto = new URL(checkurl);
			HttpURLConnection conn = (HttpURLConnection) connectto.openConnection();
			conn.setRequestMethod( "POST" );
			conn.setRequestProperty( "Content-Length", Integer.toString( postDataLength ));
			conn.setRequestProperty( "authorization", auth);
			conn.setRequestProperty( "Content-Type", "application/json");
			conn.setRequestProperty( "charset", "utf-8");
			conn.setUseCaches(false);
			conn.setAllowUserInteraction(false);
			conn.setInstanceFollowRedirects( false );
			conn.setDoOutput( true );
				
			DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
			wr.writeBytes(urlParameters);
			wr.flush();
			wr.close();
				
			int responseCode = conn.getResponseCode();
				
			BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
			StringBuilder sb = new StringBuilder();
			String line;
				
			while ((line = br.readLine()) != null) {
				sb.append(line+"\n");
			}
			br.close();
            //輸出結果
			System.out.println(sb);
		}catch (IOException e){
			e.printStackTrace();
		}
	}
}