How to get String from JSONObject without Specific Name

Question

Please check this code sample.

HttpEntity getResponseEntity = getResponse.getEntity();

String message = EntityUtils.toString(getResponseEntity,"UTF-8");

//message = {"EntryPointJsonResult":"{\"NextTransactionUrl\":null,\"TraceId\":null,\"IsAuthorizationRequired\":false,\"IsError\":false,\"ErrorCode\":null,\"ErrorMessage\":null}"}

JSONObject object = new JSONObject(message);
String objectString = object.getString("EntryPointJsonResult"); 
//objectString = {\"NextTransactionUrl\":null,\"TraceId\":null,\"IsAuthorizationRequired\":false,\"IsError\":false,\"ErrorCode\":null,\"ErrorMessage\":null}

That's the question : I want to get the "objectString" without "EntryPointJsonResult". Cause this information is different at the another response.

So how can I get the "objectString" without specific key like "EntryPointJsonResult"

You cannot. Fetching data without object name is allowed only in array — Alexander Zhak
– Alexander Zhak, Commented Oct 8, 2014 at 10:58

Amy · Accepted Answer · 2014-10-17 09:36:25Z

31

You can get values of json object like this without knowing key

Iterator<String> keys= object.keys();
while (keys.hasNext()) 
{
        String keyValue = (String)keys.next();
        String valueString = object.getString(keyValue);
}

edited Oct 17, 2014 at 9:36

answered Oct 8, 2014 at 11:02

Amy

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6 Comments

Droid Over a year ago

if there is a one element, this solution worked. But didn't work for nested json elements.

Amy Over a year ago

can you share your JSON String?

Droid Over a year ago

Something like that snip2code.com/Snippet/189462/Nested-Json-Sample. Sorry about that. Cause I didn't know the json was nested.

Amy Over a year ago

object.getJSONObject("objectString");

Droid Over a year ago

Okey but, we can not sure how many nested elements are there. So object.getJSONObject("objectString"); can give us another nested JsonObject. So maybe we can write a recursive method for that. But frankly, I don't want to deal with it. Cause it's not engineering. There is must be a shortcut for that like some library's method. Thanks a lot for your interest anyway. Best Day.

|

ToYonos · Accepted Answer · 2014-10-08 11:04:46Z

4

This should work.

JSONObject object = new JSONObject(message);
String objectString = object.getString(object.names().get(0));

But it will only work if you sure that NextTransactionUrl node exists. By the way, in this case, this node could have another name, it will still work.

answered Oct 8, 2014 at 11:04

ToYonos

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5 Comments

Droid Over a year ago

if there is a one element, this solution worked. But didn't work for nested json elements

ToYonos Over a year ago

Could you give an example ?

Droid Over a year ago

Something like that snip2code.com/Snippet/189462/Nested-Json-Sample. Sorry about that. Cause I didn't know the json was nested.

ToYonos Over a year ago

I see. But it could have many level before getting your attribubtes. Maybe recursivity ?

Droid Over a year ago

I tihnk so. But I don't understand how there is not a method for that :D Interesting.

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