Spring:在POST方法之后发送响应

Question

我正在使用Spring，我试图在发布请求后发送一个响应体。似乎Spring正在发回一些东西，但它是空的..。

第一个问题:是否可以在发送请求后发送json回复？

第二个问题:如果是，我是否必须包括一些特定的标题？

提前感谢

代码

  @CrossOrigin
  @ApiOperation(value = "Update an application", notes = "Update a document given its id. If a field is let empty, the value will not be updated.", response = Application.class)
  @ApiResponses(value = {
    @ApiResponse(code = 200, message = "successful operation"),
    @ApiResponse(code = 403, message = "Request could not be authorized."),
    @ApiResponse(code = 500, message = "Internal Server Error."),
    @ApiResponse(code = 400, message = "Malformed request.") })
  @RequestMapping(value = "/update",
    produces = { "application/json" },
    consumes = { "application/json", "text/json" },
    method = RequestMethod.POST)
  public ResponseEntity<Application> updateApplication(@ApiParam(value = "ID of the document", required = true) @RequestParam(value = "docId", required = true) String docId,
@RequestBody @ApiParam(value = "Additional data given to the application"  ) ApplicationData data)
      throws NotFoundException {

        ApplicationControllerMock dummyClass = new ApplicationControllerMock();

        ResponseEntity<Application> dummyResponse = dummyClass.updateApplication(docId, data);

        return dummyResponse;

  }

类Application是由swagger-codegen生成的类。如果我在GET方法中使用它，它只会返回一个JSON对象。

打印dummyResponse

如果我打印变量dummyResponse，就会得到以下内容：

<200 OK,class Application {
  docId: cdb226df5398f564173db460b52f40de
  companyId: 123
  projectId: 123
  rev: 2-fce2134de32fae95cee4192debef4600
  docType: 3
  docCreated: 2015-09-01T02:30:14Z
  docDeleted: false
  data: class ApplicationData {
  status: string
  domain: string
  name: string
  version: string
  gaCode: string
}

  id: a2cf532b721eedb542e884820b180b55
}
,{Access-Control-Allow-Credentials=[true], Access-Control-Allow-Origin=[*], Access-Control-Allow-Methods=[GET, OPTIONS, POST, HEAD], Access-Control-Allow-Headers=[Origin, X-Requested-With, Content-Type, Accept], Content-Type=[application/json], Access-Control-Max-Age=[3600]}>

Answer 1

我发现了问题..。@CrossOrigin自动创建这两个标头：

• “访问-控制-允许-来源”
• “访问-控制-允许-凭证”

由于我也是手动添加它们，这两个标题出现了两次。所以，我只需要把它们移走，它就起作用了。

Answer 2

是的，当请求是帖子时，可以发回回复。

您不必添加任何特定的标题。