Java HTTP client consume REST API demo

HttpClientTester.java

package updater;

import co.id.waruna.wpayroll.updater.entity.UpdateItemFile;
import co.id.waruna.wpayroll.updater.entity.UpdateItem;
import co.id.waruna.wpayroll.updater.helper.Utilz;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Maikel Chandika <mkdika@gmail.com>
 */
public class HttpClientTester {

    public static void main(String[] args) throws IOException, FileNotFoundException, NoSuchAlgorithmException {

//        File file = new File("/home/maikel/javalib/jeneric-1.0.jar");
//        
//        System.out.println(Utilz.calculateSHA1(file));

        try {
            ObjectMapper mapper = new ObjectMapper();
            String SQL_URL = "http://wpayroll-updater.waruna-group.co.id/api/sql/latest/?sqlVersion=1.0.0";
                              
            String BINARY_URL = "http://wpayroll-updater.waruna-group.co.id/api/binary/latest/";
            
            
            URL url = new URL(SQL_URL);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("X-SECRET", Utilz.SECRET_TOKEN);

            System.out.println("Response Code: " + connection.getResponseCode());
            System.out.println("Response Message: " + connection.getResponseMessage());
            System.out.println("Response Content:");
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    (connection.getInputStream())));
            StringBuilder sb = new StringBuilder();
            String output;
            while ((output = br.readLine()) != null) {
                sb.append(output);
            }
            
            System.out.println(sb.toString());

            // for binary
//            UpdateItem bfile = mapper.readValue(sb.toString(), UpdateItem.class);
//            System.out.println("version: " + bfile.getVersion());
//            System.out.println("filelist: "+bfile.getFileList().size());
//            for (UpdateItemFile f : bfile.getFileList()) {
//                System.out.println("\tFilename: "+f.getFilename());
//                System.out.println("\tSize: "+f.getSize());
//                System.out.println("\tSH1: "+f.getSha1());
//                System.out.println("\tURL: "+f.getUrl());
//            }
//            System.out.println("date: "+bfile.getDate());
//            System.out.println("description: "+bfile.getDescription());
//            System.out.println("url: "+bfile.getUrl());




            // for sql            
            List<UpdateItem> sqlfiles = Arrays.asList(mapper.readValue(sb.toString(), UpdateItem[].class));
            for (UpdateItem b : sqlfiles) {
                System.out.println("Version: " + b.getVersion());
                System.out.println("Date: " + b.getDate());
                System.out.println("Description: " + b.getDescription());
                System.out.println("URL: " + b.getUrl());
                System.out.println("File list size: " + b.getFileList().size());
                for (UpdateItemFile f : b.getFileList()) {
                    System.out.println("\tFilename: " + f.getFilename());
                    System.out.println("\tSize: " + f.getSize());
                    System.out.println("\tSH1: " + f.getSha1());
                    System.out.println("\tURL: " + f.getUrl());
                    System.out.println("\tDestination: "+f.getDestination());
                }
            }

            connection.disconnect();
        } catch (MalformedURLException | ProtocolException ex) {
            Logger.getLogger(Tester.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Tester.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}