jsp页面报错.jstl失效

jsp页面报错.jstl失效

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<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='catalog_add.html';"></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="${ requestScope.root.cataLongList }" var="cata1">
                                    <tr class="message-unread">
                                    <td class="hidden-xs">
                                        <label class="option block mn">
                                            <input type="checkbox" name="mobileos" value="FR">
                                            <span class="checkbox mn"></span>
                                        </label>
                                    </td>
                                    <%--名称--%>
                                    <td>${cata1.title}</td>
                                    <%--描述--%>
                                    <td>${cata1.info}</td>
                                    <td>
                                        <a href="/admin/CataLong/remove?id=${cata1.id }">删除</a>
                                    </td>
                                    </tr>

                                    <c:forEach var="cata2" items="${cata1.cataLongList }">
                                        <tr class="message-unread">
                                            <td class="hidden-xs">
                                                <label class="option block mn">
                                                    <input type="checkbox" name="mobileos" value="FR">
                                                    <span class="checkbox mn"></span>
                                                </label>
                                            </td>
                                                <%--名称--%>
                                            <td style="padding-left: 50px;">${cata2.title}</td>
                                                <%--描述--%>
                                            <td>${cata2.info}</td>
                                            <td>
                                                <a href="CataLong/remove?id=${cata2.id}">删除</a>
                                            </td>
                                        </tr>
                                        <c:forEach items="${cata2.cataLongList}" var="cata3">
                                            <tr class="message-unread">
                                                <td class="hidden-xs">
                                                    <label class="option block mn">
                                                        <input type="checkbox" name="mobileos" value="FR">
                                                        <span class="checkbox mn"></span>
                                                    </label>
                                                </td>
                                                    <%--名称--%>
                                                <td style="padding-left: 100px;">${cata3.title}</td>
                                                    <%--描述--%>
                                                <td>${cata3.info}</td>
                                                <td>
                                                    <a href="CataLong/remove?id=${cata3.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"/>

cata_list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>欢迎使用 IMOOC Cake 后台管理系统</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" type="text/css" href="/css/theme.css">
    <link rel="stylesheet" type="text/css" href="/css/admin-forms.css">
    <!--[if lt IE 9]>
    <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
    <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
    <![endif]-->
</head>

<body class="admin-validation-page" data-spy="scroll" data-target="#nav-spy" data-offset="200">
<div id="main">
    <header class="navbar navbar-fixed-top navbar-shadow">
        <div class="navbar-branding">
            <a class="navbar-brand" href="/index.html">
                <H3>IMOOC Cake 后台管理系统</H3>
            </a>
            <span id="toggle_sidemenu_l" class="ad ad-lines"></span>
        </div>
    </header>
    <aside id="sidebar_left" class="nano nano-light affix">
        <div class="sidebar-left-content nano-content">
            <header class="sidebar-header">
                <div class="sidebar-widget author-widget">
                    <div class="media">
                        <a class="media-left" href="#">
                            <img src="/images/head.jpg" class="img-responsive">
                        </a>
                        <div class="media-body">
                            <div class="media-author">管理员</div>
                            <div class="media-links">
                                <a href="login.html">退出</a>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="sidebar-widget search-widget hidden">
                    <div class="input-group">
                        <span class="input-group-addon">
                        <i class="fa fa-search"></i>
                        </span>
                        <input type="text" id="sidebar-search" class="form-control" placeholder="Search...">
                    </div>
                </div>
            </header>
            <ul class="nav sidebar-menu">
                <li class="sidebar-label pt20">商品管理</li>
                <li class="active">
                    <a href="cake_list.html">
                        <span class="glyphicon glyphicon-book"></span>
                        <span class="sidebar-title">商品列表</span>
                    </a>
                </li>
                <li>
                    <a href="cake_add.html">
                        <span class="glyphicon glyphicon-home"></span>
                        <span class="sidebar-title">商品上架</span>
                    </a>
                </li>
                <li class="sidebar-label pt20">分类管理</li>
                <li class="active">
                    <a href="admin/CataLong/list.do">
                        <span class="glyphicon glyphicon-book"></span>
                        <span class="sidebar-title">分类列表</span>
                    </a>
                </li>
                <li>
                    <a href="admin/CataLong/toAdd.do">
                        <span class="glyphicon glyphicon-home"></span>
                        <span class="sidebar-title">添加分类</span>
                    </a>
                </li>
            </ul>
            <div class="sidebar-toggle-mini">
                <a href="login.html">
                    <span class="fa fa-sign-out"></span>
                </a>
            </div>
        </div>
    </aside>

top.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
</div>
<style>
    /* demo page styles */
    body {
        min-height: 2300px;
    }

    .content-header b,
    .admin-form .panel.heading-border:before,
    .admin-form .panel .heading-border:before {
        transition: all 0.7s ease;
    }

    /* responsive demo styles */
    @media (max-width: 800px) {
        .admin-form .panel-body {
            padding: 18px 12px;
        }
    }
</style>

<style>
    .ui-datepicker select.ui-datepicker-month,
    .ui-datepicker select.ui-datepicker-year {
        width: 48%;
        margin-top: 0;
        margin-bottom: 0;

        line-height: 25px;
        text-indent: 3px;

        color: #888;
        border-color: #DDD;
        background-color: #FDFDFD;

        -webkit-appearance: none; /*Optionally disable dropdown arrow*/
    }
</style>

<!-- jQuery -->
<script src="/js/jquery.min.js"></script>
<script src="/js/jquery-ui.min.js"></script>
<!-- Theme Javascript -->
<script src="/js/utility.js"></script>
<script src="/js/demo/demo.js"></script>
<script src="/js/main.js"></script>
<script src="/js/pages.js"></script>
<!-- END: PAGE SCRIPTS -->
</body>


</html>

bottom.jsp

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.immoc</groupId>
  <artifactId>ImmocCake</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ImmocCake Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>




    <!--Mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.4</version>
    </dependency>
    <!--数据库-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.18</version>
    </dependency>
    <!--Servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
    </dependency>


    <!--JSTL标签-->
    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-impl</artifactId>
      <version>1.2.5</version>
    </dependency>

    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-compat</artifactId>
      <version>1.2.5</version>
    </dependency>

    <!--JSON-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.9</version>
    </dependency>

    <!--验证码-->
    <dependency>
      <groupId>com.chaoxing</groupId>
      <artifactId>kaptcha</artifactId>
      <version>2.3.2</version>
    </dependency>

    <!--MyBatis日志事务-->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.2.3</version>
    </dependency>

    <!--C3P0连接池-->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>ImmocCake</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

pom.xml

http://img1.sycdn.imooc.com//climg/5dbb98e309c6fda419060900.jpg
慕尼黑0101671 2019-11-01
源自：项目：商品信息管理   3-2 分类管理表现层
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好帮手慕柯南 回答被采纳获得+3积分 2019-11-02 10:36:41

同学你好！

首先js中的报错是不会影响程序的正常执行的。因为报错的信息涉及到的我们在项目中没有使用。报错的原因是因为：

  1. 找不到demo.js这个文件，因为在这个项目中的确没有这个文件

    http://img1.sycdn.imooc.com//climg/5dbcea7e0941a99117890302.jpg

  2. 这个报错是在说Bootstrap的JavaScript需要jQuery 1.9.1或更高版本，其实并不以影响我们功能的实现

    http://img1.sycdn.imooc.com//climg/5dbceaa7094081bf19110052.jpg

  3. 下面这个错误是在说page.js中的Demo没有定义，这是因为Demo的定义在demo.js中，但是并没有demo.js所以报错了

    http://img1.sycdn.imooc.com//climg/5dbceab50936978f19000103.jpg

    http://img1.sycdn.imooc.com//climg/5dbceae709c9905d02340093.jpg

  4. 上面的错误都是可以忽略的呢，并不会对项目的实现造成一下影响。

如果我的回答解决了你的疑惑，请采纳，祝学习愉快~

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好帮手慕阿满 2019-11-01 15:45:12

同学你好，关于显示el表达式的错误，建议同学在jsp页面中加上如下再试试：

<%@ page isELIgnored="false"%>

如果我的回答解决了你的疑惑，请采纳。祝：学习愉快~

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  • 提问者 慕尼黑0101671 #1
    下面页面的那些异常是什么原因呢
    2019-11-01 20:39:40
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