Convert List to JsonObject in Java using json simple

Question

I have a list -

List<Item> items = new ArrayList<Item>;

which consists of items - [firstname , abc , lastname , pqr , id , 1 ]

I need to convert this list to JSONObject of below format in java using json simple lib -

{"firstname":"abc","lastname":"pqr","id":"1"}

How can I achieve this? I am just a beginner.Any help would be appreciated.Thankyou in advance.

is the List data constant like you mentioned, first element is name, second element is its value, like wise on and on ??? — Srikanth Balaji
– Srikanth Balaji, Commented Jan 20, 2017 at 10:17
No,not constant.. I am getting the values in List from Bean Item by inputting values in TextFields. — Spandana
– Spandana, Commented Jan 20, 2017 at 10:22
Can you Put your Item Class structure? because you need to convert list to map and then to json.So It required to show how your Item class is exactly look like — Jekin Kalariya
– Jekin Kalariya, Commented Jan 20, 2017 at 10:25

Isha · Accepted Answer · 2017-01-21 04:50:35Z

4

Got the answer -

First converted the List to Map and then to Json -

public Map<String, String> test() {

    Map<String, String> result = items.stream().collect(Collectors.toMap(Item::getValue, Item::getType)); //Converts List items to Map

    System.out.println("Result  : " + result);

    JSONObject json = new JSONObject(result); //Converts MAP to JsonObject

    System.out.println("JSON : " + json); //prints {"firstname":"abc","lastname":"pqr","id":"1"}
    return result;
}

answered Jan 21, 2017 at 4:50

Isha

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