如何使用 RestTemplate 在 List 中获取结果并将响应放入 List？

Question

嗨，我想要实现的是我想使用其他 API 并使用 RestTemplate 将一些响应数据放入我的函数中的列表中，这是我的代码的样子：

@PostMapping("/save-new")
public ResponseEntity<ShipmentAddressGrouping> saveNewShipmentAddressGrouping(@Valid @RequestBody InputRequest<ShipmentAddressGroupingDto> request) {
    String url = baseUrl + "/load-list";

    HttpEntity<PartnerShipmentDto> requestPartnerShipmentDto = new HttpEntity<>(new PartnerShipmentDto());
    RestTemplate restTemplate = new RestTemplate();
    List<PartnerShipmentDto> partnerShipmentDto = restTemplate.postForObject(url, requestPartnerShipmentDto, new ParameterizedTypeReference<List<PartnerShipmentDto>>() {});

    ShipmentAddressGrouping newShipmentAddressGrouping = shipmentAddressGroupingService.save(request);
    return ResponseEntity.ok(newShipmentAddressGrouping);

}

如您所见，我尝试将响应放入 List，这是我在这里尝试的 restTemplate.postForObject(url, requestPartnerShipmentDto, new ParameterizedTypeReference<List<PartnerShipmentDto>>() {});

但我在 restTemplate.postForObject 中看到错误，如下所示：

The method postForObject(String, Object, Class, Object...) in the type RestTemplate is not applicable for the arguments (String, HttpEntity, new ParameterizedTypeReference<List>(){})

我应该做些什么来解决这个问题？

Answer 1

如果你想使用ParameterizedTypeReference<T>，你需要使用RestTemplate.exchange()，因为这是唯一公开ParameterizedTypeReference<T>.

类型参数的方法

List<PartnerShipmentDto> partnerShipmentDto = restTemplate.exchange(url, 
                HttpMethod.GET, 
                requestPartnerShipmentDto,
                new ParameterizedTypeReference<List<PartnerShipmentDto>>() {})
        .getBody();

如何使用 RestTemplate 在 List 中获取结果并将响应放入 List？

How to use RestTemplate to get result in List and put the response into List?

java

spring

resttemplate

microservices