HTTP 状态码 500 - JSP java.lang.IndexOutOfBoundsException

Question

嗨，我遇到了 JSP + Servlet 的问题，这是我的 HomeControl - servlet 文件

    @WebServlet("/home")
    public class HomeControl extends HttpServlet {
        private static final long serialVersionUID = 1L;
    
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            
            response.setContentType("text/html;charset=UTF-8");
            
            DAO dao = new DAO();
            List<Product> list = dao.getAllProduct();
            
            request.setAttribute("pro", list.get(0));
            request.getRequestDispatcher("Home.jsp").forward(request, response);
        }
    }

每次我运行 localhost:.../home 时，它都会返回给我状态码 500 - java.lang.IndexOutOfBoundsException，我检查了“列表”不是 null，我该如何解决这个问题，谢谢。