@WebServlet(urlPatterns = "/aa")
public class JspService extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }

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

        //设置键值对

        request.setAttribute("name","张三丰");

        //进行页面跳转
        request.getRequestDispatcher("/demojsp.jsp").forward(request,response);

    }
}

@WebServlet(urlPatterns = "/one")
public class ServletOne extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }

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

        //以键值对存储数据
        request.setAttribute("name","风清扬");

        //请求跳转
        request.getRequestDispatcher("/two").forward(request,response);
    }
}