Question

我有两个Spring Boot应用程序。一个是进行呼叫的休息客户端。另一个只有Rest端点的应用程序。

Rest客户端访问其余端点时，它将失败。

这是用于命中其余端点的代码：

HttpHeaders headers = new HttpHeaders();
headers.set(ACCEPT, APPLICATION_JSON);
headers.set(CONTENT_TYPE, APPLICATION_JSON);
HttpEntity entity = new HttpEntity(headers);

UriComponentsBuilder builder = UriComponentsBuilder
    .fromHttpUrl(url) 
    .queryParam(EMAIL, URLEncoder.encode(email, "UTF-8"))
    .queryParam(ADDRESS, URLEncoder.encode(address, "UTF-8"));

ResponseEntity<Address> response = 
commonRestTemplate
    .exchange(builder.toUriString(),  HttpMethod.GET, entity, Address.class);

这是客户端尝试访问的其余端点：

@RestController
@AllArgsConstructor
public class AddressController {
    private final RestTemplate commonRestTemplate;

    // constructor and other rest endpoints


    @RequestMapping(value = "/", method = RequestMethod.GET)
    public @ResponseBody ResponseEntity<Address> getAddress(@RequestParam String email, @RequestParam String address) {
        try {
            // do soemthing
        } catch (RuntimeException e) 
        {
            LOGGER.error(e.getMessage(), e);
            return status(HttpStatus.INTERNAL_SERVER_ERROR).build();
        }
   }
}

这是我在带有其余端点的应用程序中看到的错误：

2020-03-26 16:33:53.619  WARN 9 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'address' is not present]

2020-03-26 16:50:02.691 ERROR 9 --- [nio-8080-exec-9] u.c.h.s.s.controller.AddressController      : Key may not be empty

为什么Rest呼叫不能与Postman一起使用，而我的Rest客户却不能？

我也尝试过在其余客户端中对特殊字符进行编码，也可以不进行编码，但是没有运气。我似乎看不到我所缺少的东西

Answer 1

尝试以下更改

UriComponentsBuilder builder = UriComponentsBuilder .fromHttpUrl(url)  .queryParam("email", URLEncoder.encode(email, "UTF-8"))  .queryParam("address", URLEncoder.encode(address, "UTF-8"));

@RestController
@AllArgsConstructor
public class AddressController {
private final RestTemplate commonRestTemplate;

// constructor and other rest endpoints


@RequestMapping(value = "/", method = RequestMethod.GET)
public @ResponseBody ResponseEntity<Address> getAddress(@RequestParam("email") String email, @RequestParam("address") String address) {
    try {
        // do soemthing
    } catch (RuntimeException e) 
    {
        LOGGER.error(e.getMessage(), e);
        return status(HttpStatus.INTERNAL_SERVER_ERROR).build();
    }
 }
}

Answer 2

可能有2个问题：

正确定义了静态地址并引用了“地址”。
另一个，地址值不为null。在调用restTemplate之前打印地址值。

Answer 3

我也有这个问题。当我在交换方法中使用 uri 而不是 string 时，它解决了。

ResponseEntity<String> responseEntity = null;
Map<String, String> map = generate map to keep key and value of necessaryparameters;
UriComponentsBuilder uriComponentsBuilder = UriComponentsBuilder.fromHttpUrl("SERVICE_URL");
map.forEach((k, v) -> {
    uriComponentsBuilder.queryParam(k, v);
});
URI uri = uriComponentsBuilder.build(false).encode("windows-1256").toUri();
responseEntity = new RestTemplate().exchange(uri, HttpMethod.POST, request, String.class);

GET请求可在邮递员中使用，但不适用于SpringBoot RestTemplate

3 个答案: