return json array from spring controller

Question

I want to return with my controller spring a JSONARRAY, but when running I receive this error:

java.lang.IllegalArgumentException: No converter found for return value of type: class org.codehaus.jettison.json.JSONArray

this is my code :

@RequestMapping(value = "/generate", method = RequestMethod.GET)
@ResponseBody
public JSONArray generate() throws NoSuchFieldException, CloneNotSupportedException{

        return facturationSvc.facturer();
}

NB:The method "facturer()" of the service "facturationSvc" , returns a JSON ARRAY

pdem · Accepted Answer · 2017-04-13 08:56:06Z

4

You should return a java List, not a JSONArray. Spring uses Jackson, and the purpose of jackson is to convert java object to/from base elements like JsonArray, and then to a Json String

You don't need to directly manage json, Spring does it all for you, so the solution here is to change your return types (of the controller and the service) and manage only java Objects

@RequestMapping(value = "/generate", method = RequestMethod.GET) 
@ResponseBody public List<YourFacturerClass> generate() {

    return facturationSvc.facturer();

}

answered Apr 13, 2017 at 8:56

pdem

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1 Comment

R.Walid Over a year ago

Yes, that's what I did. Thank you

Amer Qarabsa · Accepted Answer · 2017-04-13 08:35:54Z

2

you should be returning string not JSONArray,

String generate() throws NoSuchFieldException, CloneNotSupportedException{

      return facturationSvc.facturer().toString();
}

answered Apr 13, 2017 at 8:35

Amer Qarabsa

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1 Comment

pdem Over a year ago

It works, but in Spring we dont need to use directly JsonArray

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