HttpRequest cannot be cast to MultipartHttpServletRequest

HttpRequest cannot be cast to MultipartHttpServletRequest springMVC 文件上传转换出错解决

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request；

这一句会报错：ApplicationHttpRequest cannot be cast to MultipartHttpServletRequest

那就通过这种方式：

MultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());

　　MultipartHttpServletRequest multipartRequest = resolver.resolveMultipart(request);