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[英]How to get Response Header information from Spring RestTemplate GET request
[英]How to change response http header in get request by spring RestTemplate?
我有用于创建对象的简单java spring方法
RestTemplate restTemplate = new RestTemplate();
Address address = restTemplate.getForObject(url, Address.class);
但是服务器以错误的Content-Type响应我JSON字符串: text / plain而不是application / json (在Postman中检查)。 我得到一个例外:
无法提取响应:找不到适合于响应类型[类地址]和内容类型[text / plain; charset = utf-8]的HttpMessageConverter
所以我想,我需要将响应头Content-Type更改为正确的application / json ,以便MappingJackson2HttpMessageConverter找出JSON字符串并运行代码。
经过一个小时的尝试,我找到了一种简便的方法。
默认情况下,Json转换器仅支持“ application / json ”。 我们只是重写它以支持“ 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);
谢谢你的帮助! 万一我不能更改响应的标题。 我用正确的标题创建新的响应对象。
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());
}
我敢肯定这不是一个简单且好的解决方案,但它确实有效。
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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