Java 基于springBoot 上传文件

@RequestMapping("/uploadFile")
    @ResponseBody
    public Map<String, Object> uploadFile (@RequestParam(value = "file") MultipartFile[] file, HttpServletRequest requestNew) {
        log.info("批量上传文件开始==============");
        Map<String, Object> result = new HashMap<>();
        
        if (file == null || file.length == 0) {
            result.put("msg", "上传失败,请先选择文件");
            return result;
        }
        long start = System.currentTimeMillis();
        try {
            SimpleDateFormat sf = new SimpleDateFormat("yyyyMMdd");
            String dirName = sf.format(new Date());
            String filePath = "你需要存储的服务器路径" + "/" + dirName;//excel生成的文件路径
            File fileNew = new File(filePath);
            if (!fileNew.exists()) {//判断目录是否存在
                fileNew.mkdirs();
            }
            List<String> showUrls = new ArrayList<>();
            for (MultipartFile singleFile : file) {
                log.info("上传单个文件开始;文件名:"+ singleFile.getOriginalFilename());
      
                long localStartTime = System.currentTimeMillis();
                //生成文件名称已uuid命名
                String uuid = UUID.randomUUID().toString().replaceAll("-","");
                String fileNameOld = singleFile.getOriginalFilename();
                String[] fileNameArr = fileNameOld.split("\\.");
                String fileName = uuid + "." + fileNameArr[fileNameArr.length-1];
                String filePathNew = filePath +"/" + fileName;
                File newFile=new File(filePathNew);
                singleFile.transferTo(newFile);
                String basePath = requestNew.getScheme()+"://"+requestNew.getServerName();
                log.info("上传单个文件结束,【" + fileNameOld +"】所耗时间:" + (System.currentTimeMillis() - localStartTime) + "ms");
                String showUrl = basePath  +"/production/" + dirName + "/" + fileName;
                showUrls.add(showUrl);
            }
            result.put("showUrls", showUrls);
            log.info("批量上传文件结束==============总耗时:" + (System.currentTimeMillis() - start ) +" ms");
        } catch (Exception e) {
            log.error("批量上传到服务器出错！", e);
        }
        return result;
    }

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