How to fetch value of entity from JSON String

Question

This is my Json String and I am trying to fetch the value of Entity.I am a beginner in using JSON.

[
    {
        "_id": "john",
        "preferences": [
            {
                "Entity": [
                    "IBM",
                    "Pfizer"
                ]
            },
            {
                "Topic": "Pharma"
            }
        ]
    }
]

Can anyone help me on this?

Shilpa , what did you try. Did you look at JsonSimple , or GSON to parse this. Please try using them and parsing it. — Ramachandran.A.G, Aug 11 '17 at 06:12
If you search for JSON parsing, there are plenty of resources available. — Sachin Gupta, Aug 11 '17 at 06:12
Please try to explain what exactly your problem is? Are you trying to parse in by Android or any other technology? — Maulik Dodia, Aug 11 '17 at 06:19

Swarna Sekhar Dhar · Answer 1 · 2017-08-11T06:18:44.303

0

try as follow :

JSONObject myjson = new JSONObject(the_json_string);
JSONArray the_json_array = myjson.getJSONArray("profiles");

for more : How to parse a JSON and turn its values into an Array?

edited Aug 11 '17 at 06:18

answered Aug 11 '17 at 06:16

Swarna Sekhar Dhar

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Anurag Paul · Answer 2 · 2017-08-11T07:17:56.503

You can use gson library. If your input is a JSON string, you first need to parse it using a JsonParser object which returns us a JsonElement which is converted into JsonArray as the input Json is an array. You then extract the first object from it using get(0) and then convert it into a JsonObject, extract preferences element as JsonArray and follow similar procedure to get Entity.

        String jsonString = "[" +
            "    {" +
            "        \"_id\": john," +
            "        \"preferences\": [" +
            "            {" +
            "                \"Entity\": [" +
            "                    IBM," +
            "                    Pfizer" +
            "                ]" +
            "            }," +
            "            {" +
            "                \"Topic\": Pharma" +
            "            }" +
            "        ]" +
            "    }" +
            "]";

    JsonArray jsonArray = new JsonParser().parse(jsonString).getAsJsonArray();

    JsonArray preferences = jsonArray.get(0).getAsJsonObject().get("preferences").getAsJsonArray();
    JsonArray entity = preferences.get(0).getAsJsonObject().get("Entity").getAsJsonArray();

score 0 · Answer 3 · answered Aug 11 '17 at 06:39

import org.json.*;


JSONObject obj = new JSONObject(" .... ");
String pageName = obj.getJSONObject("pageInfo").getString("pageName");

JSONArray arr = obj.getJSONArray("posts");
for (int i = 0; i < arr.length(); i++)
{
    String post_id = arr.getJSONObject(i).getString("post_id");
    ......
}

May be it may helps you: Parse JSON in Java

How to fetch value of entity from JSON String

3 Answers3