How to convert a json data to string in java

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I want to convert json data to string

import
            java.io.BufferedReader;
import java.io.BufferedReader;
import
            java.io.InputStreamReader;
import java.net.HttpURLConnection;
import
            java.net.URL;
import org.json.JSONArray;
import
            org.json.JSONObject;
public static void main(String[] args) throws
            Exception
{


 URL url = new
            URL("http://192.168.1.13/test/ProductWb.php?productId=9");
 HttpURLConnection
            conn ;
 conn = (HttpURLConnection) url.openConnection();

            conn.setRequestMethod("GET");
 conn.setReadTimeout(60);

            conn.setRequestProperty("Accept", "application/json");
 String
            json="";

 json = readUrl(conn);

            System.out.println(json);

 JSONObject jsonObject=new
            JSONObject(json);
 JSONArray
            jarray=jsonObject.getJSONArray("modeles");
 JSONObject modele=
            jarray.getJSONObject("modele");
 for (int i=0;i            {
 System.out.println(modele(i).getString("id_product"));

            System.out.println(modele(i).getString("meta_title"));

            System.out.println("*********");

            }



}

its
show me the json data but give me this the
error:

{"modeles":[{"modele":{"id_product":"9","id_shop":"1","id_lang":"4","description":null,"description_short":"
Peugeot
            208<\/pre>","info_prix":"","info_1":null,"info_2":null,"info_3":null,"info_4":null,"info_5":null,"link_rewrite":"208","meta_description":"Peugeot
            208","meta_keywords":"peugeot 208","meta_title":"Peugeot
            208","name":"208","available_now":"","available_later":""}}]}
Exception in
            thread "main" java.lang.IllegalStateException: This is not a JSON Array.
at
            com.google.gson.JsonElement.getAsJsonArray(JsonElement.java:106)
at
            com.autoreduc.services.TestProduct.main(TestProduct.java:59)



help
            me if you have any solution.
thanks in advance

            

Answer

In your code you read the json data from a
URL. I just copied your data and pasted it in a file and read the file as your url was
down. Here step by step I have shown how to parse your json object and content inside
it. For this I used
java-json-schema.jar.

            import java.io.FileNotFoundException;
 import java.io.FileReader;

            import java.io.IOException;
 import java.util.Iterator;


            import org.json.simple.JSONArray;
 import
            org.json.simple.JSONObject;
 import
            org.json.simple.parser.JSONParser;
 import
            org.json.simple.parser.ParseException;
 public class Tets
            {

 /**
 * @param args
 */
 public
            static void main(String[] args) {

 // TODO Auto-generated method
            stub
 JSONParser parser = new JSONParser();
 try{
 /* URL
            url = new URL("http://192.168.1.13/test/ProductWb.php?productId=9");

            HttpURLConnection conn ;
 conn = (HttpURLConnection)
            url.openConnection();
 conn.setRequestMethod("GET");

            conn.setReadTimeout(60);
 conn.setRequestProperty("Accept",
            "application/json");*/
 String json="";



            Object obj = parser.parse(new
            FileReader("C:\\XXX\\XX\\src\\javapackage\\t.json"));

 JSONObject
            jsonObject = (JSONObject) obj;
 System.out.println(jsonObject.toJSONString());
            //modeles object
 JSONArray name = (JSONArray)
            jsonObject.get("modeles");
 System.out.println(name.toJSONString());//array
            inside modeles array


 for (Object o :
            name)

 {
 JSONObject person = (JSONObject) o;

            JSONObject person1 = (JSONObject)person.get("modele");

            System.out.println(person.get("modele"));//modele object

            System.out.println(person1.get("id_lang"));//modele attribute
 }
            



 }catch(Exception
            e){e.printStackTrace();}


 }

            }

OutPut

Your
Json
Object

{"modeles":[{"modele":{"id_lang":"4","info_5":null,"info_4":null,"link_rewrite":"208","meta_keywords":"peugeot
            208","info_3":null,"info_2":null,"info_1":null,"available_now":"","meta_description":"Peugeot
            208","id_product":"9","description_short":"
Peugeot
            208<\/pre>","description":null,"name":"208","info_prix":"","meta_title":"Peugeot
            208","available_later":"","id_shop":"1"}}]}



Your
            Json Array contained in json
            Object

[{"modele":{"id_lang":"4","info_5":null,"info_4":null,"link_rewrite":"208","meta_keywords":"peugeot
            208","info_3":null,"info_2":null,"info_1":null,"available_now":"","meta_description":"Peugeot
            208","id_product":"9","description_short":"
Peugeot
            208<\/pre>","description":null,"name":"208","info_prix":"","meta_title":"Peugeot
            208","available_later":"","id_shop":"1"}}]


Your
            Json Object inside
            array

{"id_lang":"4","info_5":null,"info_4":null,"link_rewrite":"208","meta_keywords":"peugeot
            208","info_3":null,"info_2":null,"info_1":null,"available_now":"","meta_description":"Peugeot
            208","id_product":"9","description_short":"
Peugeot
            208<\/pre>","description":null,"name":"208","info_prix":"","meta_title":"Peugeot
            208","available_later":"","id_shop":"1"}



Your
            Json Object id_lang atrribute value =
            4

4


            src="https://i.stack.imgur.com/8sdhD.png" alt="enter image description
            here">