springmvc利用jqueryupload上传文件，后台处理方法

public void importIdentifySchemeFile(Integer id,Integer type,HttpServletRequest request, HttpServletResponse response){

PrintWriter out = null;
          try {
              //初始化变量
              InputStream stream = null;
              String ret_fileName = null;//返回给前端已修改的文件名称
              Map<String, Object> result = new HashMap<String, Object>();
           SkillIdentifyFile skillIdentifyFile = new SkillIdentifyFile();
              String fileSrc;
              String fileName;
              File uploadedFile = null;
              try {
               
                  //设置字符集
                  request.setCharacterEncoding("UTF-8");
                  response.setContentType("text/html; charset=UTF-8");
                  out = response.getWriter();
                  if(id==null){
             result.put("message", "方案不存在，不能上传");
                      out.print(new JSONObject(result).toString());
                      return;
            }
                  //获取文件流
                  MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
                  Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
                  MultipartFile multipartFile = null;
                  for (Map.Entry<String, MultipartFile> set : fileMap.entrySet()) {
                      multipartFile = set.getValue();//文件名
                  }
                  stream = multipartFile.getInputStream();

//初始化文件名，并定义上传文件
                  UUID uuid = UUID.randomUUID();
                   fileName = multipartFile.getOriginalFilename();//原始文件名
                  String suffix = fileName.substring(fileName.indexOf(".") + 1);
                 
                  ret_fileName = uuid.toString() + "." + suffix;
               // 文件保存目录路径
                  String savePath = FileSystemConfig.getFileRootPath() + FILE_PATH;                
                  // 创建文件夹
                  File dirFile = new File(savePath);
                
                  if (!dirFile.exists()) {
                      dirFile.mkdirs();
                  }
                  fileSrc = savePath + File.separator + ret_fileName;
                  uploadedFile = new File(fileSrc);
                  FileUtils.saveFile(uploadedFile, stream);
              } catch (Exception e) {
                  //读写错误异常处理
                  result.put("message", e.getMessage());
                  out.print(new JSONObject(result).toString());
                  return;
              } finally {
                  //资源关闭异常处理
                  try {
                      if (stream != null) {
                          stream.close();
                      }
                  } catch (Exception e) {
                      result.put("message", e.getMessage());
                      out.print(new JSONObject(result).toString());
                      return;
                  }
              }
                
            //初始化方案附件属性
              skillIdentifyFile.setFile(FILE_PATH + ret_fileName);//下载路径
              skillIdentifyFile.setName(fileName);//原始文件名
              skillIdentifyFile.setUpdateTime(new Date(System.currentTimeMillis()));
              skillIdentifyFile.setSkillidentifyId(id);
              skillIdentifyFile.setType(type);
                
              //保存当前附件到数据库
              skillIdentifyService.addSkillIdentifyFile(skillIdentifyFile);
             
                  result.put("message", File_SUCCESS);
                  result.put("fileName", fileName);
                  out.print(new JSONObject(result).toString());
             
          } finally {
              //将信息返回
              if (out != null) {
                  out.flush();
                  out.close();
              }
          }
     }