How to change response http header in get request by spring RestTemplate?
I have simple java spring method for creating object
RestTemplate restTemplate = new RestTemplate();
Address address = restTemplate.getForObject(url, Address.class);
But the server responds me JSON string with wrong Content-Type: text/plain instead of application/json (checked in Postman). And I get the exception:
Could not extract response: no suitable HttpMessageConverter found for response type [class Address] and content type [text/plain;charset=utf-8]
So I think, I need change response header Content-Type to right application/json , that MappingJackson2HttpMessageConverter find out JSON string and run code as well.
After trying for an hour, I found a short and easy way.
Json converter by default supports only "application/json". We just override it to support "text/plain".
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
// support "text/plain"
converter.setSupportedMediaTypes(Arrays.asList(TEXT_PLAIN, APPLICATION_JSON));
RestTemplate template = new RestTemplate();
template.getMessageConverters().add(converter);
// It's ok now
MyResult result = tmp.postForObject("http://url:8080/api",
new MyRequest("param value"), MyResult.class);
Thank you for help! In case I can't change response's header. I create new response object with right header.
ClientHttpRequest clientHttpRequest = new SimpleClientHttpRequestFactory().createRequest(URI.create(str), org.springframework.http.HttpMethod.GET);
final ClientHttpResponse clientHttpResponse = clientHttpRequest.execute();
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
Address address = new Address();
//It always true, because service always returns 200 OK
if (clientHttpResponse.getStatusCode() == HttpStatus.OK) {
address = (Address) converter.read(address.getClass(), new HttpInputMessage() {
public InputStream getBody() throws IOException {
return clientHttpResponse.getBody();
}
public HttpHeaders getHeaders() {
HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.putAll(clientHttpResponse.getHeaders());
httpHeaders.put("Content-Type", Collections.singletonList(MediaType.APPLICATION_JSON_VALUE));
return httpHeaders;
}
});
busStop.setNearestAddress(address.toString());
}
I'm sure it isn't simple and good solution, but It works.
要为您的请求设置内容类型，您可以执行以下操作：
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity entity = new HttpEntity(headers);
ResponseEntity<Address> response = restTemplate.exchange(url, HttpMethod.GET, entity, Address.class);
Address address = response.getBody();
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