Java如何获取HttpServletRequest请求参数

@PostMapping("/push")
public AjaxResult push(HttpServletRequest request) {
    try {
        String contentType = request.getContentType();
        log.info(String.format("摄像头报警请求参数类型：%s", contentType));
        if (contentType.contains("multipart/form-data;")) {
            readFile(request);
        } else {
            readParams(request);
        }
        return success();
    } catch (Exception e) {
        return success();
    }
}

public void readFile(HttpServletRequest request) {
    log.info(String.format("摄像头报警请求参数：%s", "文件"));
    // 由于HttpServletRequest不能直接取出文件数据，所以将其强制转换为MultipartHttpServletRequest
    MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
    Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
    log.info(String.format("摄像头报警请求参数：%s", String.valueOf(fileMap)));
    fileMap.forEach((key, value) -> {
        try {
            log.info(String.format("key:%s, value:%s", key, value.getName()));
            String filePath = RuoYiConfig.getUploadPath();  // 上传文件路径
            String fileName = FileUploadUtils.upload(filePath, value);
            log.info(String.format("文件已经下载：%s", fileName));
        } catch (IOException e) {
            log.error(e.getMessage());
            throw new RuntimeException(e);
        }
    });
}

public void readParams(HttpServletRequest request) {
     StringBuilder data = new StringBuilder();
     String line;
     BufferedReader reader;
     try {
         reader = request.getReader();
         while (null != (line = reader.readLine())) {
             data.append(line);
         }
     } catch (IOException e) {
         log.error(e.getMessage());
     }
     log.info(String.format("摄像头报警请求参数：%s", data));
 }