javaweb jakarta爆红问题

Question

配置：Tomcat10.1 JDK17
现象：import jakarta.servlet.*;中jakarta爆红，毫无疑问整个包都读不到
有啥可能么？
原代码如下：

package servlet;
import java.io.IOException;
import dao.UserDAO;
import dao.impl.UserDAOImpl;
import jakarta.servlet.*;
import jakarta.servlet.http.*;
import vo.UserInfo;
public class RegisterServlet extends HttpServlet{
    public RegisterServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {}

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub


        UserDAO ud = new UserDAOImpl();
        //获取或创建session对象
        boolean dot = false;
        if(!request.getParameter("passwordinput1").isEmpty() && !request.getParameter("passwordinput2").isEmpty() && !request.getParameter("email").isEmpty()) {
            if (ud.compareRegPassword(request.getParameter("passwordinput1"), request.getParameter("passwordinput2"))) {
                UserInfo userinfo = new UserInfo();
                userinfo.setEmail(request.getParameter("email"));
                userinfo.setPassword(request.getParameter("passwordinput1"));
                dot = ud.save(userinfo)；

            } else {
                request.setAttribute("errorMessage", "your password input are different");
                response.sendRedirect("./error.jsp");
            }
        }
        else{
            request.setAttribute("errorMessageNull", "your probably input nothing");
            request.getRequestDispatcher("Register.jsp").forward(request,response);
            response.sendRedirect("./login.jsp");
        }
        if(dot) {
            response.sendRedirect("./login.jsp");
        }
    }
}

Answer 1

看你引入的依赖了没有，依赖的版本对不对