Extracting a specific element from a JSON

Question

I have a JSON as folows

    {
    "Root1": {
        "Result": {
            "ID": "200",
            "Text": "OK"
        }
    }
}

Is there any way I can able to extract the values of "ID" to a variable directly without traversing through the root element i.e. "Root1". Because the root element name will change each time I run the application like "Root2", "Root3".

Below is the code in which I am trying to extract the ID with "Root1" and "Result" element

JSONObject jsonObject = new JSONObject("{\"Root1\": {\"Result\": {\"ID\": \"200\",\"Text\": \"OK\"}}}");
String element = jsonObject.getJSONObject("Root1").getJSONObject("Result").getString("ID");

I think the answer at [Jackson JSON Deserialization with Root Element](http://stackoverflow.com/questions/11704255/jackson-json-deserialization-with-root-element) will works for your issue. — BNK, Aug 28 '15 at 14:41

score 4 · Accepted Answer · answered Aug 28 '15 at 14:34

As long as the structure of the json is always consistent, you can just get all the keys from the root object, and use the first key found to access the ID:

JSONObject jsonObject = new JSONObject("{\"Root1\": {\"Result\": {\"ID\": \"200\",\"Text\": \"OK\"}}}");
String rootKey = (String)jsonObject.keys().next();
String element = jsonObject.getJSONObject(rootKey).getJSONObject("Result").getString("ID");

score 0 · Answer 2 · answered Aug 28 '15 at 15:29

0

May be u can make query over your json data using lambda expression.There is a class org.json.JSONarray using its getvalueas method and inside this method stream(your lambda ).filter(your lambda ).map(your lambda ) can solve your problem.

Thx

answered Aug 28 '15 at 15:29

objectorientedpeople

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Extracting a specific element from a JSON

2 Answers2