接口作用：

1.后端解析前端上传文件的信息，并返回前端。
2.这样可以把文件内容存数据库，而不需要存文件。

代码实现

    @PostMapping("/scriptUpload")
    @ApiOperation(value = "上传附件", notes = "")
    public Result scriptUpload(MultipartFile file, HttpServletRequest request) {
        SysUserEntityVo uc = (SysUserEntityVo) request.getAttribute("UC");
        return gClientScriptService.scriptUpload( file,uc);
    }

注意：解析时一行一样解析，不然文件中的换行字符就没了，得到的是一个大字符串。

@Override
    public Result scriptUpload(MultipartFile file, SysUserEntityVo uc) {
        String fileName = file.getOriginalFilename();
        StringBuffer sb = new StringBuffer();
        String fileContent = "";
        InputStream inputStream = null;
        BufferedReader br = null;
        try {
            inputStream = file.getInputStream();
            br = new BufferedReader(new InputStreamReader(inputStream));
            String line = null;
            while ((line = br.readLine()) != null) {
                sb.append(line);
                sb.append(System.lineSeparator());
            }
            fileContent = new String(sb);
//            System.out.println(fileContent);

        } catch (IOException e) {
            e.printStackTrace();

        }finally {
            try {
                br.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("fileName",fileName);
        jsonObject.put("fileContent",fileContent);
        return Result.ok(jsonObject);
    }