上传--spring-boot

   <dependency>
   <groupId>commons-fileupload</groupId>
   <artifactId>commons-fileupload</artifactId>
   <version>1.3.1</version>
  </dependency>

@RequestMapping(value = "/upload/", method = RequestMethod.POST)
    @ResponseBody 
    public String upload(
           @RequestParam("file") MultipartFile  upfile,
           HttpServletRequest req) throws IOException {

       String path ="D:\study\";
       String imageName =upfile.getOriginalFilename();
       // |获取输入流
       InputStream is = upfile.getInputStream();
       // |文件输出流
       //OutputStream os = new FileOutputStream(new File(path,upfile.getOriginalFilename()));
       OutputStream os = new FileOutputStream(new File(path,imageName));
       System.out.println("come0");
       // |循环写入
       int length = 0;
       byte[] buffer = new byte[128];
       while ((length = is.read(buffer)) != -1) {
           os.write(buffer, 0, length);
       }
       System.out.println("come1");
       is.close();
       os.close();
       System.out.println("come2");
       
       return imageName;
   }