Convert json array to list of json(raw) strings

Question

I've some json data like this:

[{"id":"someid","name":"some name"}, {"id":"some other id", "name":"a name"}]

I want to get the json objects in the above array aslist of strings like

(each string is json object in string form, (List<String>))

(For simplicity

 [ {"id":"someid","name":"some name"},{"id":"some other id", "name":"a name"}

I tried using jackson's TypeReference> but it is causing consituents parts like id, someid into the list elements instead of making each json object a string element.

I also tried using jackson TypeReference>, this time I'm getting the number of objects correctly, but all the double quotes are gone and ':' are converted to '=', so it converted to java object not a json raw string.

I'm getting like [{id=someid,name=somename},{id=some other id, name=a name}]

I'm interested to know how to do this using Jackson library.

Any help would be appreciated.

please post the code you have tried, we will make an effort to fix it but no one will do the work for you — Sharon Ben Asher
– Sharon Ben Asher, Commented Jul 8, 2015 at 9:04
I do not understand what is the desired output. a json object is not a list, it is a map of keys and values. please give an example of the desired list contents — Sharon Ben Asher
– Sharon Ben Asher, Commented Jul 8, 2015 at 9:06
@sharonbn I want to convert a json array to list of string such that each is string is a raw json object of the original json array. — pinkpanther
– pinkpanther, Commented Jul 8, 2015 at 10:13

Saurabh Gaur · Accepted Answer · 2015-07-08 10:16:51Z

1

Use org.json.simple.parser.JSONParser to parse JsonArray String to JsonArray Object.

    JSONParser parser = new JSONParser();
    JSONArray arr = (JSONArray) parser.parse(jsonArray);
    List<String> list = new ArrayList<String>();
    for (Object jsonObject : arr) {
        System.out.println("jsonObject>>"+jsonObject);
        list.add(jsonObject.toString());
    }

Here the prepared list contains json(raw) strings as you desire. Hope it will help you

answered Jul 8, 2015 at 10:16

Saurabh Gaur

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1 Comment

pinkpanther Over a year ago

Thanks for the answer.. equivalently I could achieve it using JSONArray. But I'm interested to know if there is a way to do it using Jackson library

pinkpanther · Accepted Answer · 2015-07-08 10:17:32Z

0

I was able to achieve the desired to result using JSONArray from json library. For any one comes across this question I'm posting this.

JSONArray jsonArray = new JSONArray(jsonString);
List<String> list = new ArrayList<String());
for(int i = 0 ; i < jsonArray.length();i++){
    list.add(jsonArray.getJSONObject(i));
}

However I'm still interested to know how to do this using Jackson library alone.

answered Jul 8, 2015 at 10:17

pinkpanther

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5 Comments

Artemio Ramirez Over a year ago

Did you ever find out how to do this with Jackson?

pinkpanther Over a year ago

@ArtemioRamirez I moved on ;)

Artemio Ramirez Over a year ago

I was hoping you could help me out, but I managed to do it. If you ever care to know: stackoverflow.com/questions/36846055/…

pinkpanther Over a year ago

@ArtemioRamirez thanks, but the double quotes are unescaped in my question and each string is a json object.

Artemio Ramirez Over a year ago

Oh, it seems I looked at so many questions I got confused and thought you were also trying to do the same as I was. My bad

ironman · Accepted Answer · 2015-12-12 13:57:50Z

0

jsonArray.getJSONObject() method returns an instance of JSONObject. So, you either need to change the return value to List<JSONObject> or within your for loop, call jsonArray.getJSONObject(i).toString() to return a List<String>

answered Dec 12, 2015 at 13:57

ironman

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