How can I convert an Array to Json (Java)

Question

I want to convert an Array into a Json Object like

String[] array = {"value1", "value2"};

into

{
  "array": ["value1", "value2"]
}

I am using Spring (Jackson XML).

I tried:

ObjectMapper objectMapper = new ObjectMapper();
ObjectNode jsonNode = objectMapper.createObjectNode();

String[] array = {"value1", "value2"};
jsonNode.put("array", Arrays.toString(array));

System.out.print(jsonNode.toString());

But the result is

{
  "array":"[value1, value2]"
}

And not

{
  "array":["value1", "value2"]
}

what I want to get.

It shoud work properly if You won't call Arrays.toString and instead pass the array itself. — Dominik Wosiński
– Dominik Wosiński, Commented Feb 13, 2020 at 18:18

Ryuzaki L · Accepted Answer · 2020-02-13 18:32:48Z

2

You are converting Array of strings into string and adding it to json object

String[] array = {"value1", "value2"};
String arr = Arrays.toString(array)   //converting array into string

Just add the array directly to ObjectNode using putArray

ArrayNode arrayNode = jsonNode.putArray("array");
Arrays.stream(array).forEach(str->arrayNode.add(str));

or you can also use addAll directly by converting array into ArrayNode

jsonNode.putArray("array").addAll(objectMapper.valueToTree(array));

edited Feb 13, 2020 at 18:32

answered Feb 13, 2020 at 18:20

Ryuzaki L

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