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

1、确认<form name=”contractForm” id=”contractForm” action=”” method=”post” enctype =”multipart/form-data”>；

2、确认commons-fileupload.jar 和 org.springframework.web.jar 存在环境

3、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);