1.文件必须选择

@PostMapping("/UpLoad") public void UpLoad(@RequestParam MultipartFile file，HttpServletRequest request) throws IllegalStateException, IOException{              if(!file.isEmpty()){              //上传文件路径              String path="";              File fileAllPath=new File(path);              //上传文件名              String fileName=file.getOriginalFilename();              File filePath=new File(path,fileName); //判断是否存在，不存在新建 if(!filePath.getParentFile().exists()){ filePath.getParentFile().mkdir(); } //将文件放到一个文件目录中去 file.transferTo(new File(path + File.separator + fileName)); } //参数获取 request.getParameter("参数对应name"); }

 

 

2.文件自由选择

 

@PostMapping("/UpLoad") public void UpLoad(HttpServletRequest request) throws IllegalStateException, IOException{                         //判断是否有文件需要上传                String contentType = request.getContentType();            if (contentType != null && contentType.toLowerCase().startsWith("multipart/")) {                MultipartHttpServletRequest multipartRequest =                    WebUtils.getNativeRequest(request, MultipartHttpServletRequest.class);                MultipartFile file = multipartRequest.getFile("file"); //file与传递过来的那么保持一致  } if(!file.isEmpty()){ //上传文件路径 String path=""; File fileAllPath=new File(path); //上传文件名 String fileName=file.getOriginalFilename(); File filePath=new File(path,fileName); //判断是否存在，不存在新建 if(!filePath.getParentFile().exists()){ filePath.getParentFile().mkdir(); } //将文件放到一个文件目录中去 file.transferTo(new File(path + File.separator + fileName)); } //参数获取 request.getParameter("参数对应name"); }