servlet找不到

/**
* 写一个serlvet方便与我们的前台进行交互
*/
@WebServlet("/index")
public class UsersFindServlet extends HttpServlet {
  //直接调用我们Dao的操作

   private  UsersDao usersDao = new UsersDao();

   @Override
   protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      this.doPost(request,response);
   }

   @Override
   protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       //获取到查询的数据
       List<Users> list = usersDao.findAll();

     //将数据封装在我们的request请求对象中
       request.setAttribute("usersList",list);
       System.out.println(list);
     //将数据回显到我们的下一个界面
       request.getRequestDispatcher("/index,jsp").forward(request,response);
   }