Question

我试图使用HttpServletRequest的.getParameterMap（）访问POST请求正文中的内容，以便填充POJO。但是，尽管有证据表明主体不是空的，但它仍返回一个空的地图：

控制器：

  @PostMapping(path = "/categories/{effectiveCategory}", produces = MediaType.APPLICATION_JSON_VALUE)
  public List<Announcement> getEffectiveCategoryAnnouncements(@PathVariable("effectiveCategory") String effectiveCategory, HttpServletRequest request) throws Exception{

AnnouncementFilter filter = new AnnouncementFilter();

logger.debug("request body: " + request.getReader().lines().collect(Collectors.joining(System.lineSeparator())));
logger.debug("request parameter map size: " + request.getParameterMap().size());
logger.debug("Content-Type header value: " + request.getHeader("Content-Type"));
logger.debug("request URL: " + request.getRequestURL());
logger.debug("request query string: " + request.getQueryString());
logger.debug("request 'province' attribute: " + request.getAttribute("province"));
logger.debug("request 'province' parameter: " + request.getParameter("province"));
logger.debug("request content length: " + request.getContentLength());

for(Map.Entry<String, String[]> entry : request.getParameterMap().entrySet()){
  switch(entry.getKey()){
    case "province":
      filter.setProvince(entry.getValue()[0]);
      break;
    case "minPrice":
      filter.setMinPrice(Double.parseDouble(entry.getValue()[0]));
      break;
    case "maxPrice":
      filter.setMaxPrice(Double.parseDouble(entry.getValue()[0]));
      break;
    case "announcementType":
      filter.setAnnouncementType(entry.getValue()[0]);
      break;
    case "userType":
      filter.setUserType(entry.getValue()[0]);
      break;
    case "orderBy":
      filter.setOrderBy(entry.getValue()[0]);
      break;
    default:
      break;
  }
}

return categoryHandler.getEffectiveCategoryAnnouncements(effectiveCategory, filter);
}

请求如下：

method: POST
uri: http://localhost:8080/categories/computing
headers:
  Content-Type: application-json
body: {"province": "Azuay"}

这是上述控制器方法中所有“ logger.debug（）”调用的输出：

[DEBUG] 2018-08-12 09:36:06.139 [http-nio-8080-exec-1] 
CategoryController - request body: {"province": "Azuay"}
[DEBUG] 2018-08-12 09:36:06.140 [http-nio-8080-exec-1] 
CategoryController - request parameter map size: 0
[DEBUG] 2018-08-12 09:06:42.224 [http-nio-8080-exec-2] 
CategoryController - Content-Type header value: application/json
[DEBUG] 2018-08-12 09:06:42.225 [http-nio-8080-exec-2] 
CategoryController - request URL: http://localhost:8080/categories/computing
[DEBUG] 2018-08-12 09:06:42.225 [http-nio-8080-exec-2] 
CategoryController - request query string: null
[DEBUG] 2018-08-12 09:06:42.225 [http-nio-8080-exec-2] 
CategoryController - request 'province' attribute: null
[DEBUG] 2018-08-12 09:06:42.225 [http-nio-8080-exec-2] 
CategoryController - request 'province' parameter: null
[DEBUG] 2018-08-12 09:06:42.225 [http-nio-8080-exec-2] 
CategoryController - request content length: 24

ServletHttpRequest .getParameterMap（）对于带有已填充JSON正文的POST请求为空

0 个答案: