Andrea Borzi Andrea Borzi - 1 year ago 179
reST (reStructuredText) Question

Cannot deserialize JSONObject (inside of JSONArray) in Java Spring

So, I have this method here:

@RequestMapping(value = "/getFields", produces = "application/json")
public Response getFields(@RequestParam(value = "id") int id)

and I have a class which extends Response.
In this class, I have defined a
, in which I put a
through a method which wraps
JSONArray.put(JSONObject obj)

At the end of my getRegistrationFields I return the instantiated object of the class extending Response.

This way, Spring should return the JSONArray contained in this object, and I should see it when I call "/getFields" REST method.

However, it gives me an Error 500

Could not write content: No serializer found for class org.json.JSONObject and no properties discovered to create BeanSerializer

Is there a quick way to fix this?

Answer Source

Try to use the next dependency (or jar:


If doesn't help, try to use Jackson ArrayNode and ObjectNode instead of JSONArray and JSONObject.

   ObjectMapper mapper = new ObjectMapper();
    ArrayNode arrayNode = mapper.createArrayNode();
    Object obj = new Object();
    arrayNode.add(mapper.createObjectNode().put("field1", "Hello Stack!"));

Please see the link to the doc:

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