springboot实现单、多文件上传过程(前后端都有)

  @RequestMapping("/newUserSave")
    public void newUserSave(HttpServletRequest req,
                              @RequestParam(value = "a_idPicPath") MultipartFile[] multipartFiles,
                              SmbmsUser smbmsUser){
        logger.info("UserController method newUserSave params:"+smbmsUser);
        //这个smbmsUser对象，是前端页面的数据封装进来的smbmsUser对象
        try {
            //多文件上传改为数组
            for (int i = 0; i <multipartFiles.length; i++) {
            	//判断文件是否为空
                if(!multipartFiles[i].isEmpty()){
                    //获取原文件名
                    String oldName = multipartFiles[i].getOriginalFilename();
                    //获取扩展名
                    String extendName = "."+FilenameUtils.getExtension(oldName);
                    int fileSize = 5000000;  //5M
                    if(multipartFiles[i].getSize()>fileSize){
                        req.setAttribute("uploadError","上传文件太大");
                        return "useradd";
                    }else if(!".jpg".equals(extendName)){
                        req.setAttribute("uploadError","上传文件格式不正确");
                        return "useradd";
                    }
                    //创建本地文件夹
                    String filePath = "d:"+ File.separator+"1_IDEA"
                            +File.separator+ UUID.randomUUID().toString()+extendName;
                    //创建文件
                    File file = new File(filePath);
                    if(!file.exists()){
                        file.mkdirs();
                    }
                    //将文件以流的形式上传到本地
                    multipartFiles[i].transferTo(file);
                    if(i==0){
                    	//i对应前端文件的顺序，赋值给相应的属性即可
                        smbmsUser.setPicPath(filePath);
                    }else{
                        smbmsUser.setWorkPath(filePath);
                    }

                }
            }

        } catch (IOException e) {
            logger.error("UserController method newUserSave error params:"+smbmsUser,e);
            e.printStackTrace();
        }
    }