Tomcat9升级到Tomcat10，javax转换jarkata

Tomcat9升级到Tomcat10，Servlet-api相关问题

public class BaseController extends HttpServlet
{
    public EmployeesService employeesService;

    @Override
    public void init(ServletConfig config)
    {
        WebApplicationContext wac = WebApplicationContextUtils.getWebApplicationContext(config.getServletContext());
        employeesService = wac.getBean(EmployeesService.class);
    }

    protected void baseSet(HttpServletRequest req , HttpServletResponse resp) throws UnsupportedEncodingException
    {
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setHeader("Access-Control-Allow-Origin","*");
    }

    public void printHtml(HttpServletResponse resp , String content) throws IOException
    {
        PrintWriter writer = resp.getWriter();
        writer.println(content);
        writer.close();
    }
}

报错：

java: 无法访问javax.servlet.ServletContext
找不到javax.servlet.ServletContext的类文件

仅此处报错

希望能成功升级到10

大版本升级，你spring不得升级？