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PagedResources <资源和RestTemplate不起作用

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我正在使用 Spring Boot REST 示例。在此，我使用RestTemplate调用返回React.Component<InjectedProps>对象的端点。但是，通过type InjectedProps = TStateProps & TDispatchProps; type HocProps = Diff<BaseProps,InjectedProps>; class Hoc extends React.Component<InjectedProps> { ... } const ConnectedHoc = connect< TStateProps,TDispatchProps,HocProps,RootState >( mapstatetoProps,dispatchProps )(Hoc); 进行呼叫时，我没有得到任何内容。但是，此服务是内置在另一个微服务中的，该微服务可以通过Web轻松访问，并且可以通过Postman进行调用。 

PagedResources<Resource<EmployeeDto>>

我使用下面的代码，但没有任何内容。

RestTemplate

如果我在下面使用，我会得到答复。

@GetMapping("/{employeeId}/employees")
public PagedResources<Resource<EmployeeDto>> getEmployyes(@PathVariable(name="employeeId") String employeeId,@RequestParam(defaultvalue="0",required = false,name="page") Integer page,@RequestParam(defaultvalue="25",name = "size") Integer size,@RequestParam(defaultvalue="billingNumber") String sortParam,@RequestParam(defaultvalue="ASC",required = false) Direction direction,Pageable pageable,HttpServletRequest request) throws IOException{

    return employeeService.getEmployeesByCid(employeeId,request);
}

注意：如果我通过邮递员执行代码，则会得到以下答复。

String uri = "http://localhost:8080/employee-api/employees/160166/employees?page=0&size=25";

RestTemplate template = new RestTemplate();
ResponseEntity<PagedResources<Resource<EmployeeDto>>> studentResponse = template
        .exchange(uri,HttpMethod.GET,null,new TypeReferences.PagedResourcesType<Resource<EmployeeDto>>(){});
System.out.println(studentResponse.getBody());
qianjun8u8 回答：PagedResources <资源和RestTemplate不起作用

我能够通过查看http://izeye.blogspot.com/2015/01/consume-spring-data-rest-hateoas-hal.html和Why does RestTemplate not bind response representation to PagedResources?来解决这个问题。

但是，这是我开发的代码，效果很好。

public class Demo {
    private static RestTemplate restTemplate() {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,false);
        mapper.registerModule(new Jackson2HalModule());

        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        converter.setSupportedMediaTypes(MediaType.parseMediaTypes("application/hal+json"));
        converter.setObjectMapper(mapper);

        return new RestTemplate(Collections.<HttpMessageConverter<?>> singletonList(converter));
    }

    public static void main(String[] args) throws JsonParseException,JsonMappingException,IOException {
        String URL = "http://localhost:8080/employee-api/employees/160166/employees?page=0&size=25";

        RestTemplate restTemplate = restTemplate();

        ResponseEntity<PagedResources<Resource<EmployeeDto>>> result = restTemplate.exchange(URL,HttpMethod.GET,null/* httpEntity */,new ParameterizedTypeReference<PagedResources<Resource<EmployeeDto>>>() {});
        PagedResources<Resource<EmployeeDto>> body = result.getBody();
        ObjectMapper mapper = new ObjectMapper();
        String writeValueAsString = mapper.writeValueAsString(body);

        System.out.println(mapper.writeValueAsString(body));
    }
}
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