如何使用Apache commons upload获取表单单独传回的数据？（需求在注释）

private void addBook(HttpServletRequest request, HttpServletResponse response){
        book = new Book();
        FileItemFactory factory = new DiskFileItemFactory();
        /**
         *需求是获取表单传回的书本名称和价格 通过mybatis查询获取书本是否唯一（返回书本对象可能是空值也可能是查询到）
         * 这里希望先把书名和价格抓取出来，而不是先通过list循环迭代出来，可以使用哪一种方法直接获取吗？
         */
          
          
         ServletFileUpload sf = new ServletFileUpload(factory);
            try {
            List<FileItem> formData = sf.parseRequest(request);
            for(FileItem fileItem:formData){
                if(fileItem.isFormField()){
                    System.out.println("common files"+ fileItem.getFieldName()+":"+ fileItem.getString("UTF-8"));
                    switch (fileItem.getFieldName()){
                        case "name":
                            book.setName(fileItem.getString("UTF-8"));
                            break;
                        case "categoryId":
                            book.setCategoryId(Long.valueOf(fileItem.getString("UTF-8")));
                            break;
                        case "level":
                            book.setLevel(Integer.valueOf(fileItem.getString("UTF-8")));
                            break;
                        case "price":
                            book.setPrice(Integer.valueOf(fileItem.getString("UTF-8")));
                            break;
                    }
                }else{
                    System.out.println("files options :"+fileItem.getFieldName());
                    String imgPath = request.getServletContext().getRealPath("/img");
                    System.out.println(imgPath);
                    String fileName = UUID.randomUUID().toString();
                    String suffix = fileItem.getName().substring(fileItem.getName().lastIndexOf("."));
                    System.out.println(imgPath);
                    System.out.println(fileName);
                    fileItem.write(new File(imgPath,fileName+suffix));
                    book.setImgPath("/img/"+fileName+suffix);
                }
            }
            bookService.insert(book);
            response.sendRedirect("/admin/book/list");
        } catch (FileUploadException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
        } catch (Exception e) {
                e.printStackTrace();
        }