Starting from the similar question, Nested JSON Array in Java I have a somewhat odd json as a response from a REST api(POST) call. I need to find out the id
and name
of the sub_items
array in each items
array element.
I tried like given below for which I am getting error like
org.json.JSONException: JSONObject["items.sub_items"] not found.
I also tried just 'sub_items' as the parameter also, but no. I am using GSON. No choice use others.
final JSONObject jsonObj = new JSONObject(JSON_STRING);
final JSONArray subItems = jsonObj.getJSONArray("items.sub_items");
final int n = subItems.length();
for (int i = 0; i < n; ++i) {
final JSONObject subI= subItems.getJSONObject(i);
System.out.println("id="+subI.getString("id"));
System.out.println("name="+subI.getString("name"));
}
The following is my json as a response from a REST api call.
{
"menu": {
"items": [{
"id": 1,
"code": "hot1_sub1_mnu",
"name": "Mutton",
"status": "1",
"sub_items": [{
"id": "01",
"name": "Mutton Pepper Fry",
"price": "100"
}, {
"id": "02",
"name": "Mutton Curry",
"price": "100"
}]
},
{
"id": "2",
"code": "hot1_sub2_mnu",
"name": "Sea Food",
"status": "1",
"sub_items": [{
"id": "01",
"name": "Fish Fry",
"price": "150"
}]
},
{
"id": "3",
"code": "hot1_sub3_mnu",
"name": "Noodles",
"status": "1",
"sub_items": [{
"id": "01",
"name": "Chicken Noodles",
"price": "70"
}, {
"id": "02",
"name": "Egg Noodles",
"price": "60"
}]
}
]
}}
As I said, my JSON is a response from an REST api call, and it is 7300 lines long, like shown below with the outline, as shown in code beautifier.
object {3}
infoTransferReqResp {1}
paramExtens : null
pageGroups {1}
pageGroups [1]
0 {4}
page_group_name : LFG - LG - Insured Summary
page_group_id : 8100
**pages [3]**
repeatingBlocks {1}
I needed to extract a string value 'questionText' from inside 'Pages' array. I used jsonPath() method with navigation path as given below which solved the problem.
JsonPath jsonPathEvaluator = response.jsonPath();
List<List<List<String>>> questions = jsonPathEvaluator.getList("pageGroups.pageGroups.pages.questions.questionText");
It gave me 3 ArrayLists one embedded in another corresponding to 3 arrays of ' pages '
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