<%--
Created by IntelliJ IDEA.
User
: vili
Date
: 2019/8/24
Time
: 17
:09
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http
://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@page isELIgnored="false" %>
<!DOCTYPE html>
<html>
<head>
<title>后台管理</title>
<link rel="stylesheet" href="css/bootstrap.css"/>
</head>
<body>
<div class="container-fluid">
<jsp
:include page="header.jsp"></jsp
:include>
<br><br>
<div class="alert alert-success" role="alert">欢迎进入叮当书城后台管理系统！</div>
</div>
</body>
</html> <%--
Created by IntelliJ IDEA.
User
: vili
Date
: 2019/8/23
Time
: 13
:42
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http
://java.sun.com/jsp/jstl/core" %>
<%@page isELIgnored="false" %>
<!--header-->
<div class="header">
<div class="container">
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<h1 class="navbar-brand"><a href="index.action">叮当书城</a></h1>
</div>
<!--navbar-header-->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a href="index.action" <c
:if test="${param.flag==1}">class="active"</c
:if>>首页</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle <c
:if test="${param.flag==2}">active</c
:if>" data-toggle="dropdown">商品分类<b class="caret"></b></a>
<ul class="dropdown-menu multi-column columns-2">
<li>
<div class="row">
<div class="col-sm-12">
<h4>商品分类</h4>
<ul class="multi-column-dropdown">
<li><a class="list" href="booktypes_list.action?pageNumber=1&btid=-1">全部系列</a></li>
<c
:forEach items="${bookTypes}" var="t">
<li><a class="list" href="booktypes_list.action?pageNumber=1&btid=${t.btid}">${t.btname}</a></li>
</c
:forEach>
</ul>
</div>
</div>
</li>
</ul>
</li>
<li><a href="recommend_books.action?rtype=2&pageNumber=1" <c
:if test="${param.flag==3 && t==2}">class="active"</c
:if>>热销</a></li>
<li><a href="recommend_books.action?rtype=3&pageNumber=1" <c
:if test="${param.flag==3 && t==3}">class="active"</c
:if>>新品</a></li>
<c
:choose>
<c
:when test="${empty user }">
<li><a href="user_register.jsp" <c
:if test="${param.flag==10 }">class="active"</c
:if>>注册</a></li>
<li><a href="user_login.jsp" <c
:if test="${param.flag==9 }">class="active"</c
:if>>登录</a></li>
</c
:when>
<c
:otherwise>
<li><a href="order_list.action" <c
:if test="${param.flag==5 }">class="active"</c
:if>>我的订单</a></li>
<li><a href="user_center.jsp" <c
:if test="${param.flag==4 }">class="active"</c
:if>>个人中心</a></li>
<li><a href="logout.action" >退出</a></li>
<li><a href="admin/index.jsp" target="_blank"><c
:if test="${param.flag==1 }"></c
:if>后台管理</a></li>
</c
:otherwise>
</c
:choose>
</ul>
<!--/.navbar-collapse-->
</div>
<!--//navbar-header-->
</nav>
<div class="header-info">
<div class="header-right search-box">
<a href="javascript
:;"><span class="glyphicon glyphicon-search" aria-hidden="true"></span></a>
<div class="search">
<form class="navbar-form" action="search_books.action">
<input type="hidden" name="pageNumber" value="1"/>
<input type="text" class="form-control" name="keyword">
<button type="submit" class="btn btn-default <c
:if test="${param.flag==7 }">active</c
:if>" aria-label="Left Align">搜索</button>
</form>
</div>
</div>
<div class="header-right cart">
<a href="book_cart.jsp">
<span class="glyphicon glyphicon-shopping-cart <c
:if test="${param.flag==8 }">active</c
:if>" aria-hidden="true"><span class="card_num"><c
:choose><c
:when test="${empty order}">0</c
:when><c
:otherwise>${order.itemMap.size()}</c
:otherwise></c
:choose></span></span>
</a>
</div>
<div class="clearfix"> </div>
</div>
<div class="clearfix"> </div>
</div>
</div>
<!--//header-->
使导航栏上的后台管理与后台管理页面连接，输出相关代码
本文探讨了在JSP页面中遇到的参数传递错误，并提供了有效的解决方案。通过修改参数传递方式，避免了因双引号使用不当导致的编译错误。此问题常见于JSP与Servlet之间的交互，对于理解JSP页面开发具有重要意义。
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