@RequestMapping(value = "upload", method = RequestMethod.POST)
    @ResponseBody
    public Object uploadImg(MultipartFile file, HttpServletRequest request) throws Exception {
//      String basePath = request.getSession().getServletContext().getRealPath("upload");
        //如果這樣寫，路徑中會帶有碟符D:*****，儲存到資料庫時應該儲存為相對地址，所以不應該這樣寫
 


        String basePath = "src/main/webapp/resources/images/upload/";//如果寫為"/專案名、resources/images/***"則也是儲存在該盤的根目錄下，所以這裡寫專案的相對路徑，但是在儲存資料庫時進行路徑的擷取

        Calendar calendar = Calendar.getInstance();
        String year = calendar.get(Calendar.YEAR) + "";
        String month = calendar.get(Calendar.MONTH) + ""
 
;
        String uploadTargetPath = basePath + year + month + "/";    //檔案目錄地址，年月作為資料夾名稱

        String originalFileName = file.getOriginalFilename();
        String fileType = originalFileName.substring(originalFileName.indexOf(".") + 1);
        logger.info("------------>>>>" + fileType);
        String newFileName = UUID.randomUUID().toString() + "."
 
 + fileType;
        File targetFile = new File(uploadTargetPath, newFileName);

        if(!targetFile.exists()) {
            new File(uploadTargetPath).mkdirs();
        }

        String pathForDb = uploadTargetPath.substring(uploadTargetPath.indexOf("resources"));//擷取希望儲存到資料庫的路徑
        UploadFileDto fileDto = new UploadFileDto(BG_IMG_KEY, originalFileName, 
                newFileName, pathForDb + newFileName, fileType);
        systemService.addOrUpdateImg(fileDto);
        file.transferTo(targetFile);
        return "上傳成功";
    }

這種方法只是自己的一個想法，不一定成熟，希望大神指正。