Develop Reference

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

*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.

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();
}

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

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);

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.

Parsing nested json array in java

I have json file in below format.
{
"data":[
{
"prjId": 1,
"name" : "Forj1",
"issue": [
{
"id": 00001,
"status" : "Closed"
},
{
"id": 00002,
"status" : "Open"
}
]
},
{
"prjId": 2,
"name" : "Forj2",
"issue": [
{
"id": 00003,
"status" : "Closed"
},
{
"id": 00004,
"status" : "Open"
}
]
}],
"issueCounter": 7,
"success": true
}
Here "data" is array of projects, and within project attribute there is array of "issue".
So far if I remove "issue" array, I am able to traverse the json to one level down in "data" attribute, If this json has "issue" array I get an error saying missing comma.
javax.json.stream.JsonParsingException: Invalid token=NUMBER at (line no=15, column no=14, offset=242) Expected tokens are: [COMMA]
Below is the code that I have right now. I have two problems with this, one is the error while reading if I place the "issue" attribute, and secondly a way to read the "issue" array and traverse all attributes within.
InputStream fis = new FileInputStream(pathToFile+"data3.json");
JsonReader jsonReader = Json.createReader(fis);
//the error is thrown on below line while reading the above json.
JsonObject jsonObject = jsonReader.readObject();
jsonReader.close();
fis.close();
System.out.println(jsonObject.getInt("issueCounter"));
//reading arrays from json
JsonArray jsonArrayData = jsonObject.getJsonArray("data");
Project [] prj = new Project[jsonArrayData.size()];
int index = 0;
for(JsonValue value : jsonArrayData){
JSONObject jsonObj = new JSONObject(value.toString());
System.out.println(jsonObj.getString("name"));
System.out.println(jsonObj.getInt("prjId"));
//this is also the place where I am stuck, I know I need to construct an array out of it by obtaining issue attribute. Below is very very wrong.
/*
JsonArray jsonArrayIssue = jsonObj.getJsonArray("issue");
for(JsonValue issue : jsonArrayIssue){
JSONObject jsonIssueObj = new JSONObject(issue.toString());
System.out.println(jsonIssueObj.getString("status"));
System.out.println(jsonIssueObj.getInt("id"));
}
*/
}
Any help or pointers is deeply appreciated. I can tweak the json if its required ultimately I need to maintain an array of issues.

The problem as others said is the JSON.
"id": 00001 <-- this is a number, numbers cannot start with a leading zero as per JSON stadard.
If you control the JSON you should tweak it.
Alternatively ff you don't, you can use a less strict parser like org.json.simple https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple
The code will be the same as yours, just adjusted to org.json.simple
try { ...
JSONObject rootJSON = (JSONObject) new JSONParser().parse(jsonString);
JSONArray dataList = (JSONArray) rootJSON.get("data");
for(Object projectObj: dataList.toArray()){
JSONObject project = (JSONObject)projectObj;
JSONArray issueList = (JSONArray) project.get("issue");
for(Object issueObj: issueList.toArray()){
JSONObject issue = (JSONObject) issueObj;
//do something with the issue
}
}
} catch (ParseException e) {
//do smth
e.printStackTrace();
}

Your json data is invalid.You can check here.
http://jsonlint.com
...issue": [{ "id": 00001,
"status": ----------------------^
Your id must be string number,string,boolean.Send 1,2,3,.... as return values and check if it works.

Your code looks okay the problem is the JSON formatting. Specifically the following lines:
"id": 00001,
"id": 00002,
"id": 00003,
"id": 00004,
Basically if you want it in that format you will need to set them as strings by wrapping the values in quotations i.e. "id": "00001" or you can use a valid number i.e. "id": 1

Validate each object in a complex JSON string

Need your expert advise here. So I have a complex JSON string that has multiple Java objects. Here is my JSON string. I have only listed one java object but it has plenty (each mapped to a java class in my code)
{
"myStoreInfo": {
"id": "12370034",
"address": australia,
"partnerInfo": {
"retailPartner": false
},
"customerContactInfo": {
"name": {
"firstName": "Ricky",
"middleName": "Sage",
"lastName": "Higging",
"gender": "Male",
},
"customerPhone": {
"areaCode": "",
"extension": "",
"completeNumber": "1234567",
},
"contactEmail": {
"emailAddress": "ricky#gmail.com"
}
}
}
}
I basically need to validate a few elements in the entire JSON string to make sure they are not null. Here is the code for validation -
public static String validateJSON(String jsonFile, Object objToValidate) throws JSONException {
JSONObject myStoreInfo = jsonFileObj.getJSONObject("myStoreInfo");
JSONObject jsonObj = null;
if(myStoreInfo!=null) {
if(myStoreInfo.isNull("id"))
return "myStoreInfo info id is null";
if(myStoreInfo.isNull("address"))
return "myStoreInfo address field is null";
jsonObj = myStoreInfo.getJSONObject("partnerInfo");
if(jsonObj!=null) {
if(jsonObj.isNull("retailPartner"))
return "partner info retail partner is null";
}
jsonObj = myStoreInfo.getJSONObject("customerContactInfo");
JSONObject name = jsonObj.getJSONObject("name");
if(name!=null) {
if(name.isNull("firstName"))
return "myStoreInfo first name is null";
if(name.isNull("lastName"))
return "myStoreInfo last name is null";
}
jsonObj = myStoreInfo.getJSONObject("customerContactInfo");
jsonObj = jsonObj.getJSONObject("contactEmail");
if(jsonObj==null)
return "myStoreInfo email id is null";
}
return null;
}
}
This works well if I am doing the validation for one java object, and my json file has that java object only. But the fact is my json file has too many of these strings that internally map to various java objects. My question here is - I need to be able to pass these objects to validate them individually. As you can see here, my validateJSON takes the object to pass as an argument. How do I split the JSON string for each object, and validate all the fields within that object are fine?

As you have too many arrays in that json string converting to Java Array list might be easier
JSONArray jsonArray = new JSONArray(jsonFile);
for(int i = 0; i < jsonArray.length(); i++){
JSONObject json = (JSONObject)new JSONParser().parse(jsonArray[i]);
//convert to java list
}

Extracting data from JSON array

I know its an array, but I am completely new to JSON and need help comprehending how this is structured, here is my attempt at extracting data:
String JSonString = readURL("//my URL is here");
JSONArray s = JSONArray.fromObject(JSonString);
JSONObject Data =(JSONObject)(s.getJSONObject(0));
System.out.println(Data.get("name"));
My JSON data that I have goes like this :
{
"sports": [
{
"name": "basketball",
"id": 40,
"uid": "s:40",
"leagues": [
{
"name": "National Basketball Assoc.",
"abbreviation": "nba",
"id": 46,
"uid": "s:40~l:46",
"groupId": 7,
"shortName": "NBA",
"athletes": []
}
]
}
],
"resultsOffset": 10,
"resultsLimit": 10,
"resultsCount": 1,
"timestamp": "2013-11-18T03:15:43Z",
"status": "success"
}
I dont really have a strong grasp of this stuff so all the help is appreciated.

Here is the idea :
JSONObject root = new JSONObject(yourJsonString);
JSONArray sportsArray = root.getJSONArray("sports");
// now get the first element:
JSONObject firstSport = sportsArray.getJSONObject(0);
// and details of the first element
String name = firstSport.getString("name"); // basketball
int id = firstSport.getInt("id"); // 40
JSONArray leaguesArray = firstSport.getJSONArray("leagues");
// and so on, you can process leaguesArray similarly
It should work (feel free to complain about compile errors if there are any)

Your JSON data is an object (it starts with a curly brace). In the next inner layer, there is a single array (at key "sports"):
String jsonString = readURL("//my URL is here");
JSONObject result = JSONObject(jsonString);
JSONArray sports = result.getJSONArray("sports");
JSONObject sport = sport.getJSONObject(0);
System.out.println(sport.getString("name"));
I might have used another JSON library than you.

JSON means JavaScript Object Notation.
Objects in javascripts are just containers and can be represented by key-value pairs. Please find below notations to understand about json.
Represent objects in json: E.g. Student
{"name" : "Robin", "rollnumber" : "1"}
Represent array in json : E.g. Array of students
[{"name" : "Robin", "rollnumber" : "1"}, {"name" : "Mark", "rollnumber" : "2"}]
You can understand more on JSON from diagrams on this link http://www.json.org/fatfree.html
There are various ways available to to convert JSON to javaobject and javaobject to JSON : One of them is http://wiki.fasterxml.com/JacksonInFiveMinutes

Adding detailed code here along with the imports .
If this helps.
import org.json.JSONException;
import org.json.JSONObject;
public class extractingJSON {
public static void main(String[] args) throws JSONException {
// TODO Auto-generated method stub
String jsonStr = "{\"name\":\"SK\",\"arr\":{\"a\":\"1\",\"b\":\"2\"},\"arrArray\":[{\"a\":\"1\",\"b\":\"2\"}]}";
JSONObject jsonObj = new JSONObject(jsonStr);
String name = jsonObj.getString("name");
System.out.println(name);
String first = jsonObj.getJSONObject("arr").getString("a");
System.out.println(first);
first = jsonObj.getJSONArray("arrArray").getJSONObject(0).getString("a");
System.out.println(first);
}
}

Android - How to parse JSONObject and JSONArrays from api.rottentomatoes

so, there's this JSON code. Im trying to get the "abridged_cast".
but its complicated.
its JSONObject
inside JSONArray onside jSONObject Inside JsonArray....
{
"total": 591,
"movies": [
{
"title": "Jack and Jill",
"year": 2011,
"runtime": "",
"release_dates": {
"theater": "2011-11-11"
},
"ratings": {
"critics_score": -1,
"audience_score": 90
},
"synopsis": "",
"posters": {
"thumbnail": "",
"profile": "",
"detailed": "",
"original": ""
},
"abridged_cast": [
{
"name": "Al Pacino",
"characters": []
},
{
"name": "Adam Sandler",
"characters": []
},
{
"name": "Katie Holmes",
"characters": []
}
],
"links": {
"self": "",
"alternate": ""
}
}
],
"links": {
"self": "",
"next": ""
},
"link_template": ""
}
this is my code for getting "title" and "year"
if (response != null) {
try {
// convert the String response to a JSON object,
// because JSON is the response format Rotten Tomatoes uses
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray movies = jsonResponse.getJSONArray("movies");
// add each movie's title to an array
movieTitles = new String[movies.length()];
for (int i = 0; i < movies.length(); i++) {
JSONObject movie = movies.getJSONObject(i);
movieTitles[i] = movie.getString("title");
}
hope someone would help me because i cant figure out how to get the abridged_cast"

movies contains an array of "movie" objects. Each one of those objects contains a field abridged_cast that is an array of (let's call them "cast member") objects.
If you're not going to map to a POJO and instead are going through the JSON, you simply need to get that array in your loop after getting movie, and get each "cast member" object from that array in the same manner using another loop.
...
JSONArray cast = movie.getJSONArray("abridged_cast");
for (int j = 0; j < cast.length(); j++) {
JSONObject castMember = cast.getJSONObject(j);
...
}
Edit from comments: Your original question involved how to extract the information from the JSON you have; the above code explains that. It now seems like you're asking a more fundamental programming question around how to use it.
If you're going to use the included org.json classes that come with Android, you now know how to access the information in the returned JSON object. And you could write methods around the parsed JSONObject to access the data as-is using the objects and methods from the json.org package. For example, you could write a "getMovie()" method that took the name of the movie as a string and searched that "movies" array for the right one and returned it as a JSONObject.
Normally you would create classes in Java that encapsulate the data returned in that JSON and use data structures that lend themselves to your access patterns (For example, a Map that conatained all the movies using their names as keys). Using the org.json classes you'll have to instantiate those objects and populate them manually as you parse the JSON like you're doing in your question. If you used either the Gson or Jackson JSON parsing libraries they are capable of taking the JSON you have and mapping all the data to the classes your create and returning them in a single call.

try {
String Movie = null;
String abridged = null;
JSONArray jsonResponse = new JSONArray(response);
for (int i = 0; i< jsonResponse.length(); i++) {
Movie = jsonResponse.getJSONObject(i).getString("movies").toString();
System.out.println("movies="+Movie);
abridged = jsonResponse.getJSONObject(i).getString("abridged_cast").toString();
}
JSONArray jArray = new JSONArray(Movie);
for (int i = 0; i< jArray.length(); i++) {
String title = jArray.getJSONObject(i).getString("title").toString();
System.out.println("title="+title);
}
JSONArray jabridgeArray = new JSONArray(abridged);
for (int i = 0; i< jabridgeArray.length(); i++) {
String title = jabridgeArray.getJSONObject(i).getString("name").toString();
System.out.println("title="+title);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}