使用 Apache HTTP 客户端和 Spring REST 发送 HTTP PUT 请求时出现问题

Question

我开发了一个简单的 REST API，它使用 Spring Boot 2.3.1.RELEASE 和 Oracle JDK 14 提供简单的 HTTP PUT 请求。下面是服务器端 REST 端点：

@Controller
@RequestMapping("/api/documents")
public class DocumentController {

   @PutMapping(value = "/setCurrentTenant", consumes = "multipart/form-data")
    public ResponseEntity<?> setCurrentTenant(
             @RequestParam(value = "documentId", required = false) Long documentId,
             @RequestParam("tenantId") Long tenantId) {
        return documentService.setCurrentTenant(documentId, tenantId);
    }
}

以及客户端代码：

HttpPut putRequest = new HttpPut("http://localhost:8080/api/document/setCurrentTenant");
MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
    
builder.addTextBody("documentId", "1");
builder.addTextBody("tenantId", "10");
HttpEntity setCurrentTenantEntity = entityBuilder.build();
putRequest.setEntity(setCurrentTenantEntity);
httpClient = HttpClients.createDefault();
HttpResponse response = httpClient.execute(putRequest);

我尝试运行代码，一切正常，但是当客户端请求发送到服务器时，Spring 会记录如下异常：

Resolved [org.springframework.web.bind.MissingServletRequestParameterException:
 Required Long parameter 'tenantId' is not present]

我错过了什么吗？

Answer 1

您应该发送tenantId 作为请求参数，如

http://localhost:8080/api/document/setCurrentTenant?tenantId=10

我担心你为什么在不发送任何文件/二进制数据的情况下使用 multipart/form-data

---

class TenantRequest {
  Long tenantId;
  Long documentId;
  //seter, getter
}

@PutMapping(value = "/setCurrentTenant", consumes = "multipart/form-data")
public ResponseEntity<?> setCurrentTenant(TenantRequest request) {
 // TODO
}

或

@PutMapping(value = "/setCurrentTenant", consumes = "multipart/form-data")
public ResponseEntity<?> setCurrentTenant(@ModelAttribute TenantRequest request) {
 // TODO
}