文件上传并返回查看地址

由于项目中要用到文件上传,将文件上传到指定的目录中,并且生成网络地址,以供之后通过网络地址进行请求查看

支持多文件上传

 SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/");     /**      * 上传文件      * @param uploadFiles      * @param request      * @return      */     @ApiOperation(value = "文件上传", notes = "文件上传")     @DataSource(name = DataSourceNames.MASTER)     @PostMapping("/uploads")     public String upload(MultipartFile[] uploadFiles, HttpServletRequest request,                          @RequestParam(name = "dataId", required = false) Integer dataId,                          @RequestParam(name = "lx", required = false) String lx,                          @RequestParam(name = "ly", required = false) String ly     ) {         List list = new ArrayList();//存储生成的访问路径         if (uploadFiles.length > 0) {             for (int i = 0; i < uploadFiles.length; i++) {                 MultipartFile uploadFile = uploadFiles[i];                 //设置上传文件的位置在该项目目录下的uploadFile文件夹下，并根据上传的文件日期，进行分类保存//                 String realPath = request.getSession().getServletContext().getRealPath("uploadFile");//                realPath = "192.168.20.4:90";                 String format = sdf.format(new Date());                 File folder = new File("E:\\dist\\uploadFile" + format);   // 这里的dist就是前端部署时使用的dist文件夹   format是利用时间格式创建的文件夹                 if (!folder.isDirectory()) {                     folder.mkdirs();                 }                 String oldName = uploadFile.getOriginalFilename();                 System.out.println("oldName = " + oldName);                 String newName = UUID.randomUUID().toString() + oldName.                         substring(oldName.lastIndexOf("."), oldName.length());                 System.out.println("newName = " + newName);                 try {                     //保存文件                     uploadFile.transferTo(new File(folder, newName));                     //生成上传文件的访问路径                     String filePath = request.getScheme() + "://" + request.getServerName() + ":"+ request.getServerPort() + "/uploadFile" + format + newName;                     list.add(filePath);                 } catch (IOException e) {                     e.printStackTrace();                 }             }             //根据条件查询,对应的类型,对应的字段是以及存在对应的文件             QueryWrapper<UploadFiles> queryWrapper = new QueryWrapper<>();             queryWrapper.lambda().eq(UploadFiles::getDataId,dataId)             .eq(UploadFiles::getLx,lx)             .eq(UploadFiles::getLy,ly)             .orderByDesc(UploadFiles::getCreateTime);             List<UploadFiles> list1 = uploadFilesService.list(queryWrapper);             UploadFiles uploadFile = new UploadFiles();             //如果存在,即更新对应的文件地址,不存在则根据传入值新增文件记录             if (list1.size() > 0)             {                 uploadFile = list1.get(0);                 uploadFile.setUrl(list.toString());             }else             {                 uploadFile.setCreateTime(new Date());                 uploadFile.setDataId(dataId);                 uploadFile.setLx(lx);                 uploadFile.setLy(ly);                 uploadFile.setUrl(list.toString());             }             uploadFilesService.saveOrUpdate(uploadFile);             return list.toString();         } else if (uploadFiles.length == 0) {             return "请选择文件";         }         return "上传失败";     }

参考文档:https://blog.csdn.net/Shu2018ai/article/details/97623776