📄 denlu.jsp
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<%@ page contentType="text/html;charset=GB2312" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page isELIgnored="false"%>
<html>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="170" vliagn="top">
<c:if test="${empty sessionScope.user_id}">
<tr>
<td>
<p align="center"><font size="2" color="#000080">用户登录</font></td>
</tr>
<form action="checkLogin.jsp" method="post">
<tr>
<td><font size="2" color="#000080">用户名：
<input type="text" name="user_name" size="14"></font></td>
</tr>
<tr>
<td><font size="2" color="#000080">密 码：
<input type="password" name="user_password" size="14"></font></td>
</tr>
<tr>
<td align="center"><font size="2" color="#000080">
<a href="${pageContext.request.contextPath}ZhuCe.jsp">新注册用户</a>
<input type="submit" value="登录"></font></td>
</tr>
</html:form>
</c:if>
<c:if test="${not empty sessionScope.user_id}">
<tr>
<td align="center"><font size="2" color="#000080">
欢迎您!${sessionScope.user_name}</font></td>
</tr>
<tr>
<td align="center"><font size="2" color="#000080">
<a href="${pageContext.request.contextPath}viewBuyCar.jsp">查看购物车</a>
<a href="${pageContext.request.contextPath}viewOrderForm.jsp">查看订单</a></font></td>
</tr>
<tr>
<td align="center"><font size="2" color="#000080">
<a href="ZhuCe.jsp">新注册用户</a>
<a href="exitlogin.jsp">退出登录</a></font></td>
</tr>
</c:if>
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