老师，我的拿不到数据

BookDao

BookServiceImpl

BookService

BookDao.xml

BookController

@Controller("bookController")
public class BookController {
   @Autowired
   private BookService bookService;

   public void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       List<Book> list = bookService.getAll();
       request.setAttribute("LIST",list);
       request.getRequestDispatcher("../category.jsp").forward(request,response);
   }

   public void toAdd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       List<Book> list = bookService.getAll();
       request.setAttribute("DLIST",list);
       request.getRequestDispatcher("../staff_add.jsp").forward(request,response);
   }
   public void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, IOException {
       Integer categoryId = Integer.valueOf(request.getParameter("categoryId"));
       String name = request.getParameter("name");
       Integer level = Integer.valueOf(request.getParameter("level"));
       Integer price = Integer.valueOf(request.getParameter("price"));
       String imgPath = request.getParameter("imgPath");
       Date createTime = null;
       Date updateTime = null;
       try {
           createTime = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("createTime"));
           updateTime = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("updateTime"));
       } catch (ParseException e) {
           e.printStackTrace();
       }

       Book book = new Book();
       book.setCategoryId(categoryId);
       book.setName(name);
       book.setLevel(level);
       book.setPrice(price);
       book.setImgPath(imgPath);
       book.setCreateTime(createTime);
       book.setUpdateTime(updateTime);
       bookService.add(book);
       response.sendRedirect("list.do");
   }

   public void toEdit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       Integer id = Integer.parseInt(request.getParameter("id"));
       Book book = bookService.get(id);
       request.setAttribute("OBJ",book);
       List<Book> list = bookService.getAll();
       request.setAttribute("DLIST",list);
       request.getRequestDispatcher("../staff_edit.jsp").forward(request,response);
   }
   public void edit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       Integer id = Integer.parseInt(request.getParameter("id"));
       Integer categoryId = Integer.valueOf(request.getParameter("categoryId"));
       String name = request.getParameter("name");
       Integer level = Integer.valueOf(request.getParameter("level"));
       Integer price = Integer.valueOf(request.getParameter("price"));
       String imgPath = request.getParameter("imgPath");
       Date createTime = null;
       Date updateTime = null;
       try {
           createTime = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("createTime"));
           updateTime = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("updateTime"));
       } catch (ParseException e) {
           e.printStackTrace();
       }

       Book book = bookService.get(id);
       book.setCategoryId(categoryId);
       book.setName(name);
       book.setLevel(level);
       book.setPrice(price);
       book.setImgPath(imgPath);
       book.setCreateTime(createTime);
       book.setUpdateTime(updateTime);

       bookService.edit(book);
       response.sendRedirect("list.do");
   }
   public void remove(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       Integer id = Integer.parseInt(request.getParameter("id"));
       bookService.remove(id);
       response.sendRedirect("list.do");
   }

   public void detail(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       Integer id = Integer.parseInt(request.getParameter("id"));
       Book book = bookService.get(id);
       request.setAttribute("OBJ",book);
       request.getRequestDispatcher("../staff_detail.jsp").forward(request,response);
   }
}

category.jsp