Parse JsonString to JsonObject in Java

java, json

Solution

I'll give you an alternative since it looks like `quick-json` has trouble parsing empty json arrays. Check out `Gson`.

String json = "{ \"response\": true, \"model_original_id\": \"5acea0b5:1431fde5d6e:-7fff\", \"model_new_id\": 500568, \"model_new_version\": 1, \"reload\": true, \"idsModelProperties\": [{ \"key\": \"creation_date\", \"value\": \"2013-12-23\" }, { \"key\": \"state\", \"value\": 1, \"displayValue\": \"Analisi\" }], \"idsNodes\": [], \"idsConnectors\": [], \"idsNodesProperties\": []}";
JsonParser jsonParser = new JsonParser();
JsonElement jsonElement = jsonParser.parse(json);

`JsonElement` is an abstract class. Its sub types are `JsonArray`, `JsonNull`, `JsonObject` and `JsonPrimitive`. In the example above, the actual instance is a `JsonObject` because your json `String` is a json object. It internally contains a `LinkedTreeMap` but you don't really need access to it. You can access the different json objects directly on the `JsonElement`.

Problem

I have the following String : ``` { "response": true, "model_original_id": "5acea0b5:1431fde5d6e:-7fff", "model_new_id": 500568, "model_new_version": 1, "reload": true, "idsModelProperties": [{ "key": "creation_date", "value": "2013-12-23" }, { "key": "state", "value": 1, "displayValue": "Analisi" }], "idsNodes": [], "idsConnectors": [], "idsNodesProperties": [] } ``` and i need to parse it as a JSONObject. I tried to use quickjson but it gives me an exception when it tries to parse an emty string . This is what i tried : ``` JsonParserFactory factory=JsonParserFactory.getInstance(); JSONParser parser=factory.newJsonParser(); Map jsonData=parser.parseJson(response_output); ``` Exception: Exception in thread "main" com.json.exceptions.JSONParsingException: @Key-Hierarchy::root/idsNodes[0]/ @Key:: Value is expected but found empty...@Position::256 Any idea?

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