java 上传txt json等类型文件解析后返回给前端

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。

@Overridepublic 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);}