Java 如何在SpringREST客户端中获取页面内容

我有以下REST控制器：

@RestController
class PersonController {

   final PersonService personService

   @Autowired
   PersonController( PersonService personService ){
    this.personService = personService
   }

   @RequestMapping(value="/persons",method=RequestMethod.GET)
   Page<Person> list( Pageable pageable){
     Page<Person> persons = personService.listAllByPage(pageable)
     persons
   } 
}

现在我阅读了这个stackoverflow条目并添加了CustomPageImpl类：

我将客户端中的方法更改为以下内容：

@Override
public List<PersonDTO> findAll() throws DataAccessException {
    try {
        restClient.getServiceURI(PERSON_URL));
        ResponseEntity<CustomPageImpl<PersonDTO>> response =
            restClient.exchange(
                restClient.getServiceURI(PERSON_URL),
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<CustomPageImpl<PersonDTO>>() {
                });
        return response.getBody().getContent();
    } catch (Exception e){}
}

---

在您提到的同一个堆栈溢出条目中，有一个针对exchange请求的解决方案。您可以使用

PagedResources

而不是页面/自定义实现。更多细节

以下是您的请求：-

ResponseEntity<PagedResources<PersonDTO>> response =
            restClient.exchange(
                restClient.getServiceURI(PERSON_URL),
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<PagedResources<PersonDTO>>() {
                });
PagedResources<PersonDTO> resBody = response.getBody();
        return resBody.getContent();// Returns a collection 

ResponseEntity响应=
restClient.exchange(
restClient.getServiceURI（PERSON\uURL），
HttpMethod.GET，
无效的
新的ParameteredTypeReference（）{
});
PagedResources resBody=response.getBody（）；
返回resBody.getContent（）；//返回一个集合

@Override
public List<PersonDTO> findAll() throws DataAccessException {
    try {
        restClient.getServiceURI(PERSON_URL));
        ResponseEntity<PageImpl<PersonDTO>> response =
            restClient.exchange(
                restClient.getServiceURI(PERSON_URL),
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<PageImpl<PersonDTO>>() {
                });
        return response.getBody().getContent();
    } catch (Exception e){}
}

 org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.springframework.data.domain.PageImpl]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.PageImpl` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)

@Override
public List<PersonDTO> findAll() throws DataAccessException {
    try {
        restClient.getServiceURI(PERSON_URL));
        ResponseEntity<CustomPageImpl<PersonDTO>> response =
            restClient.exchange(
                restClient.getServiceURI(PERSON_URL),
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<CustomPageImpl<PersonDTO>>() {
                });
        return response.getBody().getContent();
    } catch (Exception e){}
}

 org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.springframework.data.domain.Pageable]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.springframework.data.domain.Pageable` (no Creators, like default construct, exist): abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type information

ResponseEntity<PagedResources<PersonDTO>> response =
            restClient.exchange(
                restClient.getServiceURI(PERSON_URL),
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<PagedResources<PersonDTO>>() {
                });
PagedResources<PersonDTO> resBody = response.getBody();
        return resBody.getContent();// Returns a collection