如何在Spring boot中使用带有承载令牌和表单数据的REST模板调用REST Api

Question

我正在使用Postman调用一个rest api，它使用以下请求给出了成功的响应（200确定），

正文=>form-data=>key:companyId，值：123456

但是当我在spring boot中使用rest模板调用这个api时，它给出了400个错误请求。代码如下所示，

HttpHeaders headers = new HttpHeaders();
headers.set("Authorization", "Bearer " + token);

HashMap<String, String> requestBody = new HashMap<>();
requestBody.put("companyId", "123456");

HttpEntity requestEntity = new HttpEntity<>(requestBody, headers)

ResponseEntity<CompanyResponse> response = restTemplate.exchange(uri, HttpMethod.POST, requestEntity, CompanyResponse.class);

Answer 1

您必须配置RESTTemplate：add FormHttpMessageConverter

RestTemplate restTemplate = new RestTemplateBuilder()
                .messageConverters(
                        new MappingJackson2HttpMessageConverter(objectMapper()),
                        new FormHttpMessageConverter())
                .build()

在发送请求时，必须将mediatype.application_form_urlencode设置为contentType，并使用multivaluemap而不是hashmap作为请求正文：

HttpHeaders headers = new HttpHeaders();
headers.set("Authorization", "Bearer " + token);
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

MultiValueMap<String, String> requestBody = new LinkedMultiValueMap<>();
requestBody.put("companyId", "123456");

HttpEntity requestEntity = new HttpEntity<>(requestBody, headers)

ResponseEntity<CompanyResponse> response = restTemplate.exchange(uri, HttpMethod.POST, requestEntity, CompanyResponse.class);