Spring RestTemplate 不工作

Question

我使用 RestTemplate 在 Spring 中创建了应用程序，使用 Rest-Template 我正在使用一个外部 Web 服务，它有一个 header 接受为 "application/json"。在我的 Rest-Template 中，我添加了 header 但它仍然给了我以下异常

org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class com.site.Employee] and content type [application/octet-stream]

我的代码如下

    private static String BASE_URI = "http://localhost:8181/test/employee"

    final HttpHeaders requestHeaders = new HttpHeaders();
    requestHeaders.setAccept(Collections.singletonList(new MediaType("application", "json")));
    requestHeaders.setContentType(new MediaType("application", "json"));
    final HttpEntity<?> requestEntity = new HttpEntity<Object>(requestHeaders);

    final RestTemplate restTemplate = new RestTemplate();

    restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
    restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

    final ResponseEntity<Employee> responseEntity = restTemplate.exchange(BASE_URI, HttpMethod.GET, requestEntity, Employee.class);

谁能告诉我一些解决方案

更新 1

当我尝试下面的代码时，它工作正常

final ResponseEntity<String> responseEntity = restTemplate.exchange(BASE_URI, HttpMethod.GET, requestEntity, String.class);
Employee employee = new ObjectMapper().readValue(responseEntity.getBody(), Employee.class);

Answer 1

您需要将 application/octet-stream 添加到 MappingJackson2HttpMessageConverter 中支持的 mimetypes 列表中：

final MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
mappingJackson2HttpMessageConverter.setSupportedMediaTypes(Arrays.asList(MediaType.APPLICATION_JSON, MediaType.APPLICATION_OCTET_STREAM));
restTemplate.getMessageConverters().add(mappingJackson2HttpMessageConverter);

Spring RestTemplate 不工作

Spring RestTemplate not working

java

spring

resttemplate

spring-rest