GET请求在Postman中工作，但不能与SpringBoot RestTemplate一起使用

Question

我有一个两个Spring Boot应用程序。一个是进行rest调用的rest客户端。另一个只有Restendpoint的应用程序。

当rest客户机到达Restendpoint时，它会失败。

这是用于命中restendpoint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endpoint：

@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restendpoint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 调用适用于邮递员而不是我的 rest 客户端？

我也尝试过在rest客户端中对特殊字符进行编码和不编码，但运气不好。我似乎看不到我错过了什么

Answer 1

可以是2个问题：

< li >静态地址定义正确，指的是“地址”。 < li >另一个，地址值不为空。在调用restTemplate之前打印地址值。

Answer 2

我也有这个问题。当我在交换方法中使用 uri 而不是字符串时，它已解决。

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);

Answer 3

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();
    }
 }
}