servlet-到底哪出錯了 ，老報錯，使用session就可以

到底哪出錯了 ，老報錯，使用session就可以

<%

List<Users> usersli = (List) request.getAttribute("usersli");

Users users;
/*Debug*/System.out.println("show_users.jsp");
if (usersli !=null) {
for (int i = 0; i < usersli.size(); i++) {
users = (Users)usersli.get(i);
%>
< tr>
< td><%=users.getUser()%>
< td><%=users.getPassword()%>
< td><%=users.getNumber()%>
< td><%=users.getRoot()%>
< td>
< form id="form2" name="form2" method="post" action="">
< input type="submit" name="updata" id="updata" value="編輯" />
< input type="submit" name="del" id="del" value="刪除" />
< /form>
< /td>
< /tr>

<%
}
}

%>

SERVLET代碼：

private void show(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException{

    String root =(String)request.getParameter("chooseroot");
    String user = (String)request.getParameter("condition");

    /*Debug*/System.out.println("ShowServlet.show()，權限="+root+",條件="+user);
    UsersDAO usersDAO = new UsersDAO();
    List<?> usersli= new ArrayList<Object>();
    usersli = usersDAO.show(root,user);
    //list傳遞
    request.setAttribute("usersli", usersli);

    request.getRequestDispatcher("../show/show_users.js").forward(request,response);

    //request.getSession().setAttribute("usersli",usersli );

    //response.sendRedirect("../show/show_users.jsp");
}

最佳回答：

request.getRequestDispatcher("../show/show_users.js").forward(request,response);

相對路徑寫錯了，js->jsp就好了