Json parsing in array java

Question

I am new to JSON parsing and I would need your kind help to understand how to parse a JSON object inside an Array.

My JSON structure log is below:

{A:"text",B:"text",C:[{T:"Text",D:{E:"Text",F:{G:"time"}},H:{I:"200"},J:{K:{L:53,M:2.2},N:"Text"},P:{Q:"Time"}}]}

log is my input JSON as above.

JSONObject logJson = (JSONObject) JSONSerializer.toJSON( log );
String a = logJson.getString("A");
String b = logJson.getString("B");

Now question is how do I parse into the Array and get JSONObject. I am using net.sf API.

Answer 1

First of all, I think your json format is invalid.

The "key" must stand in " as well e.g. "A":"text"

You can get the "C" Array by using JSONArray jsonArray = logJson.getJSONArray("C");

On the array you can iterate:

for(int i = 0; i < jsonArray.length(); i++)
{
 JSONObject obj = jsonArray.getJSONObject(i);
 ...
}

• user1677986: Thanks.. But I mean the key can be without "
• HashtagMarkus: Ok, I doublechecked, according to the json specification its invalid, according to different implementations (eg.g javascript) it "might" be valid.
• user1677986: with your above code I can get the value of C, but how do I get the values of D, E , F , G ???
• HashtagMarkus: The same way as before... If its an object obj.getJSONObject("D"); if its an array obj.getJSONArray("D"); The structure of this json string is pretty awkward, so it's very inconvenient to access all JSON objects

Answer 2

Hope this will help ::

 JSONObject objonthwiseClaimJSON = JSONObject.fromString(strJSONMonthwiseClaim);
 JSONArray objDateWiseClaimJSONArr = objonthwiseClaimJSON.getJSONArray("dateWiseClaimList");
 for(int dtwclaim=0; dtwclaim<objDateWiseClaimJSONArr.length();dtwclaim++)
{
 JSONObject objDateWiseClaimJSONObject =(JSONObject) objDateWiseClaimJSONArr.get(dtwclaim);
 String dcnid = (String) objDateWiseClaimJSONObject.get("dcnid");
 String remark = (String) objDateWiseClaimJSONObject.get("remark");
 }

In your situation ::

JSONObject logJson = (JSONObject) JSONSerializer.toJSON( log );
String a = logJson.getString("A");
String b = logJson.getString("B");
JSONArray c = logJson.getJSONArray("C"); // If C is not an array, just a plain object
for(int i =0;i<c.length();i++)
{
... // 
}

• user1677986: Ok. But how do I traverse into the jsonobjects inside the array ?
• Sashi Kant: @user1677986: Have updated my answer, please check if that has helped
• user1677986: Ok... This helped me to understand retreving jsonobject inside array, but how do I get the json object, like in the example C:[{T:"Text",D:{E:"Text",F:{G:"time"}},
• Sashi Kant: @user1677986: PLease check now
• user1677986: In my case C is an array and I want to also print other values like E, F, G and so on.