public void setCateBook(HttpServletRequest request, HttpServletResponse response) {
		ArrayList categoryList;
		BookCategoryDAO bcdao = new BookCategoryDAO();
		categoryList = bcdao.querryCategory();
		request.setAttribute("category", categoryList);
	
		ArrayList bookList;
		BookDAO bookdao = new BookDAO();
		bookList = bookdao.querryAllBooks();
		request.setAttribute("books", bookList);
		
		try {
			request.getRequestDispatcher("../index.jsp").forward(request, response);
		} catch(Exception e) {
			e.printStackTrace();
		}
	}