Convert JSON Result to Java Array

Question

I'm trying to convert this json into an array

public class RestWebService {
/**
 * @param args
 */
public static void main(String[] args) {
 try {
 URL url = new URL("http://192.168.18.171/magento/api/rest/products");
 HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 //conn.setRequestMethod("GET");
 //conn.setRequestProperty("Accept", "application/json");
 System.out.println(conn.getResponseCode());
 if(conn.getResponseCode() != 200)
 {
 throw new RuntimeException("Failed : HTTP error code : "
 + conn.getResponseCode());
 }
 System.out.println(conn.getInputStream());
 BufferedReader br = new BufferedReader(new InputStreamReader(
 (conn.getInputStream())));
 String output;
 System.out.println("Output from Server .... \n");
 while ((output = br.readLine()) != null) {
 System.out.println(output);
 }
 conn.disconnect();
 }catch (MalformedURLException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 }
}

}

the output of this program is:

{"21":{"entity_id":"21","type_id":"simple","sku":"HTC Mobiles","description":"HTC is the creator of many award-winning mobile devices and industry firsts. HTC's portfolio includes smartphones and tablets powered by HTC Sense\u2122","short_description":"HTC is the creator of many award-winning mobile devices and industry firsts. HTC's portfolio includes smartphones and tablets powered by HTC Sense\u2122","meta_keyword":"HTC is the creator of many award-winning mobile devices and industry firsts. HTC's portfolio includes smartphones and tablets powered by HTC Sense\u2122","name":"HTC Desire X Dual Sim","meta_title":"SmartPhones | HTC | DESIRE X","meta_description":"HTC is the creator of many award-winning mobile devices and industry firsts. HTC's portfolio includes smartphones and tablets powered by HTC Sense\u2122","regular_price_with_tax":90,"regular_price_without_tax":90,"category_name":"Smartphones","category_id":"20","final_price_with_tax":90,"final_price_without_tax":90,"is_saleable":"1","image_url":"http:\/\/192.168.18.171\/magento\/media\/catalog\/product\/cache\/0\/image\/9df78eab33525d08d6e5fb8d27136e95\/h\/t\/htx-desire-x-ii.jpg"},"19":{"entity_id":"19","type_id":"simple","sku":"Dell laptop","description":"The Inspiron 15R laptop features a 15.6\" screen, color options and up to 3rd Gen Intel\u00ae Core\u2122 processors to keep you stylish and connected.","short_description":"The Inspiron 15R is a well-balanced laptop with something for everyone. Unless you need longer battery life, there's no need to spend more.","meta_keyword":"The Inspiron 15R is a well-balanced laptop with something for everyone. Unless you need longer battery life, there's no need to spend more.","name":"Dell Inspiron 15R","meta_title":"Laptop | Dell | Inspiron15R","meta_description":"The Inspiron 15R is a well-balanced laptop with something for everyone. Unless you need longer battery life, there's no need to spend more.","regular_price_with_tax":120,"regular_price_without_tax":120,"category_name":"Laptop","category_id":"19","final_price_with_tax":115,"final_price_without_tax":115,"is_saleable":"1","image_url":"http:\/\/192.168.18.171\/magento\/media\/catalog\/product\/cache\/0\/image\/9df78eab33525d08d6e5fb8d27136e95\/h\/o\/how-to-deal-with-hp-laptop-power-issues.jpg"}

How to convert this json into an array? In php we use json_decode for convert as array. like that here we have anything. I'm new for this kindly help me.

Thanks,

• luanjot: There is a good tutorial here mkyong.com/java/how-to-convert-java-object-to-from-json-jackson
• Kamlesh Meghwal: possible duplicate :stackoverflow.com/questions/2255220/…

Answer 1

Native J2SE can't do this. You need to use a json framework which can do this. Following link lists frameworks that are out there which can do this.

http://www.json.org/

Some of the heavily used frameworks are

json-lib/jackson/gson

Answer 2

try this

JSONObject jObject= new JSONObject(output);
JSONArray menuObject = new JSONArray(jObject.getString("21"));
String sku,entity_id;
 for (int i = 0; i<menuObject.length(); i++)
 {
 entity_id=menuObject.getJSONObject(i).getString("entity_id");
 sku= menuObject.getJSONObject(i).getString("entity_id");
 }

• vinox: i cannot add the output in jsonobject