@Controllerpublic class MultiController {    // 处理器方法    @RequestMapping(value = "/two.do")    public String doFirst(HttpSession session,            @RequestParam MultipartFile[] uploadFile) throws Exception {        for (MultipartFile item : uploadFile) {            // 1.获取文件名称            String filename = item.getOriginalFilename();            // 6.必须选择上传文件            if (item.getSize() > 0) {                // 5.限制文件类型                if (filename.endsWith("jpg") || filename.endsWith("png")                        || filename.endsWith("txt")) {                    // 2.获取保存的前路径                    String rootPath = session.getServletContext().getRealPath(                            "upload");                    // 3.拼接路径                    File realPath = new File(rootPath, filename);                    // 4.保存                    item.transferTo(realPath);                } else {                    return "/error.jsp";                }            } else {                return "/error.jsp";            }        }        return "/two.jsp";    }}