Question

I am trying to post a json object to a .net web service:

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new GsonHttpMessageConverter());
answer[] answers = restTemplate.postForObject(url, new Gson().toJson(request), answer[].class);

The generated json looks fine so far:

{"request":1234}

but when sent to the web service with the help of the restTemplate the content of the http request is kind of messed up:

"{\"request\":1234}"

and the service responds with error code 400 bad request

Edit: found the problem

The problem was that I encoded the object twice.
RestTemplate already encodes the object to json.

the working code is:

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new GsonHttpMessageConverter());
answer[] answers = restTemplate.postForObject(url, request, answer[].class);

Answer 1

No need to encode the object with gson as RestTemplate already does that

correct code:

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new GsonHttpMessageConverter());
answer[] answers = restTemplate.postForObject(url, request, answer[].class);