Question

jsp 网页的用户名显示不出来，怎么取得username 并且显示出来

<%@ page pageEncoding="gb2312"%>
<%@ page import="bean.User" %>
<%! User user=null;%>
<a href="bookworm.jsp"><img src=".\webpic\bookworm.jpg" border=0 height="45">首页</a>
<marquee behavior=scroll height=20 width=200 bgcolor=white scrollamount=2
direction=left hspace=10 vspace=5 scrolldelay=1 loop=-1>
<p><font size="5" color="#BE9D2E">欢迎您来到书屋</font>
</marquee>
<div align="right">
<table>
<tr>
<td align=left>
<% user=(User)session.getAttribute("user");
if(user!=null){
out.print("您好,"+user.getUserName()+"!  <a href=Logout>退出登陆</a>  ");
}
%>
</td>
<td>
<a href="checkCart"><img src="./webpic/cart.gif"border="0" name="cart">我的购物车</a>
<a href="login.jsp"><img src="./webpic/login-gold-3d.gif" border="0" name="login"></a>
<a href="register.jsp"><img src="./webpic/newuser-gold-3d.gif" border="0"></a>
</td>
</tr>
</table>
</div>

Answer 1

登陆后将信息写入SESSION中 然后在页面从SESSION中取出
//创建session 并把用户user写入session中
HttpSession session = req.getSession(true);
session.setAttribute("user", user);

Answer 2

javaBean语句要加上吧<jsp:useBean id="user" scope="page" class="bean.User"/>

追问

要加在那一行啊

追答

将第三行替换