Json parsing in Java, returning main elements

Question

İm working on java project (originally android project) that does json parsing

Originally im trying to find page id from title

İ have the following json string that have information about page id but i cant return the page id 3434750

How can i acces array that contains "pageid" "ns" and "title" without knowing key(3434750) ?

How can i do it?

Thanx in advance

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score 1 · Accepted Answer · edited May 23 '17 at 12:32

1

Get json object "pages" and Loop throw it by using iterator

Iterator<String> iterator = json.keys();
while (iterator .hasNext()) {
    String key = iterator .next();
    try {
        Object value = json.get(key);
    } catch (JSONException e) {

    }
}

edited May 23 '17 at 12:32

Community

1
1

answered Jul 09 '16 at 21:19

Siarhei

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This gives me what? An array or value that i want(pageid:3434750) ? – sir mordred Jul 10 '16 at 07:31
if you put into json variable "pages" object it returns you "3434750" - the key of the object. then you need to get object by this key and then you got access to pageid,ns and title – Siarhei Jul 10 '16 at 09:36
JSONObject jsonQuery = (JSONObject) jsonObject.get("query"); JSONObject jsonPage = (JSONObject) jsonQuery.get("pages"); and then how can i supply iterator with **jsonPage** ? Sorry man im not familiar with json thats why im asking too much questions..thank you very much again – sir mordred Jul 10 '16 at 11:42
smth like that: Iterator iter = jsonPage.keys(); while (iter.hasNext()) { String key = iter.next(); try { jsonObject obj = jsonPage.getJSONObject(key); } catch (JSONException e) {} – Siarhei Jul 10 '16 at 14:24
Thank you very much man..and also **Object value** contains 3434750 right? But 3434750 is **Long** type so how can i convert it to/return from **Long** type? – sir mordred Jul 10 '16 at 20:14
have you tried getLong https://developer.android.com/reference/org/json/JSONObject.html#getLong(java.lang.String) ? – Siarhei Jul 10 '16 at 20:48
Do you mean Long id = value.getLong("pageid"); – sir mordred Jul 10 '16 at 20:57
yes, JSONObject value = jsonPage.getJSONObject(key); id = value.getLong("pageid"); – Siarhei Jul 10 '16 at 21:01
Ok i tried and if i define JSONObject value = jsonPage.getJSONObject(key); id = value.getLong("pageid"); above the while loop, it gives me "error: undefined "key" in getJSONObject(key)" so i defined it inside of while loop..is it correct right? – sir mordred Jul 12 '16 at 12:21
yes, it's ok. but you should keep in mind that you need to process all pages, if several pages come into request(if it ossible for you project) i mean {"333111":, "444223", .... } – Siarhei Jul 12 '16 at 14:04

Json parsing in Java, returning main elements

1 Answers1