How to get JSON data that contains JSON Object and array both

Question

*I am already getting this JSON object from responce.body(). I want every data inside this separately in variable. I am using java.

    {  
   "Classes":{  
      "Primary":{  
         "Classes":{  
            "1":{  
               "section":[  
                  "a",
                  "b"
               ]
            },
            "2":{  
               "sections":[  
                  "a",
                  "b"
               ]
            }
         }
      }
   }
}

*I know how to get the JSONObject but i dont know how can i get that array inside "section". even if i get that array with JSONArray then how to convert it to JSONObject? or String.

*Note that inside value of "section" array is dynamic, value inside that array is dynamic and can be multiiple from "a" to "z". Also JSONObject inside "Classes"(inside primary) is also dynamic. there can be dynamic and multiple "1","2"... and it is string, It is not necessary that there will be incremental numbers.

in your json `classes` is not an `object` or `array` its `Map` — Muhammad Muzammil Sharif, Mar 21 '19 at 18:05
Is your `section` key dynamic or changeable? Or you made typing mistake? Please let me know. — Al-Amin, Mar 22 '19 at 05:33
@Al-Amin the Key sections is fixed but inside values that is "a","b",.."n" is dynamic and can be multiple. — black-hacker, Mar 22 '19 at 05:47
@black-hacker just check out my answer man. It will solve your problem. — Al-Amin, Mar 22 '19 at 05:49

score 1 · Accepted Answer · answered Mar 22 '19 at 05:39

After 30 mins of war, I find out your answer just copy this code and paste where you want to use -

Here it is -

            String json = "{
              "Classes": {
                "Primary": {
                  "Classes": {
                    "1": {
                      "section": [
                        "a",
                        "b"
                      ]
                    },
                    "2": {
                      "sections": [
                        "a",
                        "b"
                      ]
                    }
                  }
                }
              }
            }";

            try {
                JSONObject jsonObject = new JSONObject(json);
                Log.d("jsonObj", jsonObject.toString());

                JSONObject classJsonObj = jsonObject.optJSONObject("Classes");
                JSONObject primaryJsonObj = classJsonObj.optJSONObject("Primary");
                JSONObject internalClassJsonObj = primaryJsonObj.optJSONObject("Classes");

                if(internalClassJsonObj != null){
                    int i = 1;
                    JSONObject dynmaicInternalJsonObj = null;
                    while (true){
                        dynmaicInternalJsonObj = internalClassJsonObj.optJSONObject(i+"");
                        if(dynmaicInternalJsonObj != null){
                            JSONArray sectionJsonArr = dynmaicInternalJsonObj.optJSONArray("sections");
                            Log.d("SectionArr", sectionJsonArr.toString());

                            // Finally you got your section data here...
                            if(sectionJsonArr != null){
                                for(int j=0; j<sectionJsonArr.length(); j++){
                                    System.out.println("Dynamic Sections Data is: - " + sectionJsonArr.opt(j));
                                }

                                System.out.println("\n\n");
                            }

                        }else{
                            break;
                        }

                        i++;
                    }

                }

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

Inside that dynmaicInternalJsonObj you are giving "1","2","3",.... like that but it is a string, it is not necessary that there will be incremental numbers there. So, is there any way to go through it via using .lenght()? — black-hacker, Mar 22 '19 at 06:13
Your answer is most helpful...i solved the problem by adding iterator-loop instead of that while loop. — black-hacker, Mar 22 '19 at 06:58
Yes you can replace this("1","2","3") incremental key. But you need to change your `Classes` object to json array. If you don't want to change your json structure then you need to take that part(Classes) as HashMap and then you can dynamically parse that data. Here is a clue you may try - https://stackoverflow.com/questions/7304002/how-to-parse-a-dynamic-json-key-in-a-nested-json-result — Al-Amin, Mar 22 '19 at 08:14

score 0 · Answer 2 · answered Mar 21 '19 at 17:10

0

You've tagged this as java so I can only assume you want a solution for that language.

To use this data it needs to parsed, this means you are converting the data into a more usable type.

Click this to learn how to parse JSON in java

answered Mar 21 '19 at 17:10

Jordan Robinson

82
6

score 0 · Answer 3 · answered Mar 21 '19 at 17:21

0

Assuming you need solution in java, use this to get a object classes for your json structure and then convert your json to java objects using libraries like GSON.

Example:

String json = "{\"city\":\"San Jose\", \"state\": \"CA\", \"country\":\"USA\"}";

Gson gson = new Gson();

Place place = gson.fromJson(json, Place.class);

answered Mar 21 '19 at 17:21

Logic

2,230
2
24
41

I am already converting the whole JSONObject into String, But i want every field inside it separately. – black-hacker Mar 22 '19 at 04:27

score 0 · Answer 4 · answered Mar 22 '19 at 06:23

If you are using ionic (typescript or javascript), you can use the below approach

var json = "{
          "Classes": {
            "Primary": {
              "Classes": {
                "1": {
                  "section": [
                    "a",
                    "b"
                  ]
                },
                "2": {
                  "sections": [
                    "a",
                    "b"
                  ]
                }
              }
            }
          }
        }";
for(let item in json.Classes.Primary.Classes){
console.log(item.sections);
}

If you want to display the same data in frontend using html, use *ngFor

<div *ngFor="let item in json.Classes.Primary.Classes ">
 <h5>{{item.sections}}</h5>
</div>

I hope it helps.

How to get JSON data that contains JSON Object and array both

4 Answers4