异常：An exception occurred processing JSP page [/select.jsp] at line [22]

问题：org.apache.jasper.JasperException: An exception occurred processing JSP page [/select.jsp] at line [22]

19:</tr>
20:    <%
21:        List<User> lsUser = (List<User>)request.getAttribute("lsUser");
22:        for(int i = 0; i < lsUser.size(); i++) {
23:    %>
24:<tr>
25:<td><%=lsUser.get(i).getId() %></td>

解决办法：不能直接访问这个JSP，通过UserServlet进行跳转访问