JAVA ObjectNode get in JSON array

Question

I have a JSON that I get with ObjectNode.

However, I can not get the ID of the object "LibellePrerequis" Is the method used the right one?

if I do :

String libelleprerequis = objectNode.get("id").asText();

I have the id of the script

{
"script":{
"id":2,
"name_script":"tes",
"libellePrerequis": {"id":3, "name_libelle":"Soc contrat VAM"}
}

My controller :

    @PostMapping("/create")
        public ResponseEntity<Script> updateScriptLibellePrerequis(@RequestBody ObjectNode objectNode) {
            String libelleprerequis = objectNode.get("libellePrerequis.id").asText();
            System.out.println("Libelle Prerequis with ID = " + libelleprerequis + "...");
}

error :

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null

Your id is a numeric value. You try to get it asText. Is this correct? — Uwe Allner
– Uwe Allner, Commented May 6, 2019 at 14:04
i try to make asInt and asLong .. and i try libellePrerequis.name_libelle with asText and same error — hulriche
– hulriche, Commented May 6, 2019 at 14:04
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null — hulriche
– hulriche, Commented May 6, 2019 at 14:10
try objectNode.get("libellePrerequis").get("id").asText() as this should return objectNode.get("libellePrerequis") JsonNode Object — Manoj Krishna
– Manoj Krishna, Commented May 6, 2019 at 14:38

Manoj Krishna · Accepted Answer · 2019-05-06 14:45:30Z

2

try objectNode.get("libellePrerequis").get("id").asText() as this should return objectNode.get("libellePrerequis")is a JsonNode Object

answered May 6, 2019 at 14:45

Manoj Krishna

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