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javaarraysjsonspringjackson
TheScarabaeus
TheScarabaeus

Reputation: 33

How can I convert an Array to Json (Java)

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.

Upvotes: 3

Views: 2243

Answers (1)

Ryuzaki L
Ryuzaki L

Reputation: 40048

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));

Upvotes: 2

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