为什么有一部分页面不显示？？？

页面代码直接复制老师的源码catalog_list.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<jsp:include page="top.jsp"/>
<section id="content_wrapper">
<section id="content" class="table-layout animated fadeIn">
<div class="tray tray-center">
<div class="content-header">
<h2> 分类管理</h2>
<p class="lead"></p>
</div>
<div class="admin-form theme-primary mw1000 center-block" style="padding-bottom: 175px;">
<div class="panel heading-border">
<div class="panel-menu">
<div class="row">
<div class="hidden-xs hidden-sm col-md-3">
<div class="btn-group">
<button type="button" class="btn btn-default light">
<i class="fa fa-trash"></i>
</button>
<button type="button" class="btn btn-default light">
<i class="fa fa-plus" onclick="javascript:window.location.href='/admin/Catalog/toAdd.do';"></i>
</button>
</div>
</div>
</div>
</div>
<div class="panel-body pn">
<table id="message-table" class="table admin-form theme-warning tc-checkbox-1">
<thead>
<tr class="">
<th class="text-center hidden-xs">Select</th>
<th class="hidden-xs">名称</th>
<th class="hidden-xs">描述</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach items="${root.children}" var="cat1">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td>${cat1.title}</td>
<td>${cat1.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat1.id}">删除</a>
</td>
</tr>
<c:forEach items="${cat1.children}" var="cat2">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td style="padding-left: 50px;">${cat2.title}</td>
<td>${cat2.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat2.id}">删除</a>
</td>
</tr>
<c:forEach items="${cat2.children}" var="cat3">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td style="padding-left: 100px;">${cat3.title}</td>
<td>${cat3.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat3.id}">删除</a>
</td>
</tr>
</c:forEach>
</c:forEach>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</div>
</section>
</section>
<jsp:include page="bottom.jsp"/><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<jsp:include page="top.jsp"/>
<section id="content_wrapper">
<section id="content" class="table-layout animated fadeIn">
<div class="tray tray-center">
<div class="content-header">
<h2> 分类管理</h2>
<p class="lead"></p>
</div>
<div class="admin-form theme-primary mw1000 center-block" style="padding-bottom: 175px;">
<div class="panel heading-border">
<div class="panel-menu">
<div class="row">
<div class="hidden-xs hidden-sm col-md-3">
<div class="btn-group">
<button type="button" class="btn btn-default light">
<i class="fa fa-trash"></i>
</button>
<button type="button" class="btn btn-default light">
<i class="fa fa-plus" onclick="javascript:window.location.href='/admin/Catalog/toAdd.do';"></i>
</button>
</div>
</div>
</div>
</div>
<div class="panel-body pn">
<table id="message-table" class="table admin-form theme-warning tc-checkbox-1">
<thead>
<tr class="">
<th class="text-center hidden-xs">Select</th>
<th class="hidden-xs">名称</th>
<th class="hidden-xs">描述</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach items="${root.children}" var="cat1">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td>${cat1.title}</td>
<td>${cat1.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat1.id}">删除</a>
</td>
</tr>
<c:forEach items="${cat1.children}" var="cat2">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td style="padding-left: 50px;">${cat2.title}</td>
<td>${cat2.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat2.id}">删除</a>
</td>
</tr>
<c:forEach items="${cat2.children}" var="cat3">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td style="padding-left: 100px;">${cat3.title}</td>
<td>${cat3.info}</td>
<td>
<a href="/admin/Catalog/remove.do?id=${cat3.id}">删除</a>
</td>
</tr>
</c:forEach>
</c:forEach>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</div>
</section>
</section>
<jsp:include page="bottom.jsp"/>