Spring restTemplate issue in getting response

Question

My rest server is generating response when I called it with rest client software. When I call it with resttemplate code mentioned above, then server generates response(print logs) but resttemplate does nothing(no next line executes after call) and prints internal error.

This is the method in my server

@ResponseBody
public ResponseEntity<Map<String, Object>> name(){......
...
return new ResponseEntity<Map<String, Object>>(messagebody, HttpStatus.OK);
}

This is the way I am calling it through restTemplate

ResponseEntity<Map> response1 = restTemplate.getForEntity(finalUrl.toString(), Map.class);

Do you have any additional details about the internal error? — Sergey Yamshchikov
– Sergey Yamshchikov, Commented Mar 19, 2015 at 8:56

Sergey Yamshchikov · Accepted Answer · 2015-03-19 08:55:18Z

23

Try to use ParameterizedTypeReference instead of wildcarded Map. It should looks like this.

ParameterizedTypeReference<Map<String, Object>> typeRef = new ParameterizedTypeReference<Map<String, Object>>() {};

ResponseEntity<Map<String, Object>> response = restTemplate.exchange(finalUrl.toString(), HttpMethod.GET, null, typeRef);

answered Mar 19, 2015 at 8:55

Sergey Yamshchikov

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Comments

RustyTheBoyRobot · Accepted Answer · 2016-07-22 14:56:23Z

this is a example that works for me

@RequestMapping(value = "/getParametros/{instancia}", method = RequestMethod.GET, produces = MediaType.TEXT_PLAIN_VALUE)
public ResponseEntity<String> getParametros(@PathVariable String instancia)
{
    LOG.debug("REST. Obteniendo parametros del servidor " + instancia);
    Map<String, String> mapa = parametrosService.getProperties(instancia);
    HttpHeaders headers = new HttpHeaders();
    headers.add("Content-Type", "application/json; charset=UTF-8");
    headers.add("X-Fsl-Location", "/");
    headers.add("X-Fsl-Response-Code", "302");
    ObjectMapper mapper = new ObjectMapper();

    String s = "";
    try
    {
        s = mapper.writeValueAsString(mapa);
    } catch (JsonProcessingException e)
    {
        LOG.error("NO SE PUEDE MAPEAR A JSON");
    }

    if (mapa == null)
        return new ResponseEntity<String>(HttpStatus.BAD_REQUEST);

    return new ResponseEntity<String>(s, headers, HttpStatus.OK);
}

Abhishek Singh · Accepted Answer · 2018-06-27 07:28:09Z

-1

you can Catch the HttpStatusCodeException from which you can get response in String . below code works for me.

restTemplate.postForObject( url, jsonRequest, ResponseData.class );
catch( HttpStatusCodeException codeException )
{
    String payload = codeException.getResponseBodyAsString();
    System.out.println( payload );

}

answered Jun 27, 2018 at 7:28

Abhishek Singh

171 bronze badge

1 Comment

gmode Over a year ago

expecting an exception for a successful request so you can extract a body is a terrible practice

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