How to parse unknown JSON structure in Java

Question

I have this bit of code:

JSONArray data = object.getJSONArray("Test");

for (int i = 0; i < data.length(); i++)
{
    JSONObject dataObject = data.getJSONObject(i);
    etc ...

I don't know before run time what I will have in dataObject though. Is it possible to loop through the keys somehow?

I thought this might work, as I saw it mentioned in another Stackoverflow article:

for (String key : dataObject.keys())

But I get an error saying "Can only iterate over an array or an instance of java.lang.Iterable"

Does anyone know how it can be done?

It will be determined dynamically, but it will look something like this: {"Test":[{"CouldBeAnything":"CBA_Value","CouldBeSomethingElse":"CBSE_Value", ... }, {"CouldBeAnything2":"CBA2_Value","CouldBeSomethingElse2":"CBSE2_Value", ... }]} — b85411, Oct 28 '13 at 08:32
Check [this](http://stackoverflow.com/questions/19398204/how-to-parse-a-json-array-with-the-same-structure-but-different-names/19398566#19398566) — Jhanvi, Oct 28 '13 at 10:29

score 4 · Accepted Answer · answered Oct 28 '13 at 08:40

4

To Retrieving the keys of your object this might work :

Iterator<?> iterator = object.keys();
while (iterator.hasNext()) {
   String key = (String)iterator.next();
   //do what you want with the key.                 
}

answered Oct 28 '13 at 08:40

KunalK

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score 0 · Answer 2 · answered Oct 28 '13 at 08:30

0

JSONArray names()
Returns an array containing the string names in this object.

http://developer.android.com/reference/org/json/JSONObject.html

answered Oct 28 '13 at 08:30

baltov

194
5

score 0 · Answer 3 · answered Oct 28 '13 at 08:32

0

I hope this will help

Object obj = parser.parse(s);
JSONArray array = (JSONArray)obj;

Refer below link

http://json.org/java/

http://www.tutorialspoint.com/json/json_java_example.htm

answered Oct 28 '13 at 08:32

Hariharan

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score 0 · Answer 4 · edited May 23 '17 at 11:44

0

i guess

Iterator keys = json.keys();

this will give you the keys of your json object as java iterator

How can I iterate JSONObject to get individual items

This will give you an idea to get the keys and values in iterative manner and helps you to implement for your need

edited May 23 '17 at 11:44

Community

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answered Oct 28 '13 at 08:39

sam

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How to parse unknown JSON structure in Java

4 Answers4