Project2024
/
cms-system


			
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        <title>IfLabel判断标签 · 梦想家内容管理系统（Dreamer CMS）</title>
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            <a href="http://www.iteachyou.cc" target="_blank" class="custom-link">I Teach You，我教你！</a>
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            <a href="https://gitee.com/iteachyou/dreamer_cms" target="_blank" class="custom-link">Dreamer CMS（Gitee）</a>
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            <a href="https://github.com/iteachyou-wjn/dreamer_cms" target="_blank" class="custom-link">Dreamer CMS（Github）</a>
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                    封面
            
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                    版权
            
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                    前言
            
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                    简介
            
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                    主题
            
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                    发行方法
            
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                    在线手册
            
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                    最后
            
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                    第一章 模板设计师要求
            
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                    设计师
            
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                    开发者
            
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                    第二章 模板制作流程
            
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        <li class="chapter " data-level="5.1" >
            
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                    第三章 模板文件及目录结构
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="5.1.1" data-path="../chapter03/">
            
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                    模版目录
            
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        <li class="chapter " data-level="5.1.2" data-path="../chapter03/Description.html">
            
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                    模板文件与功能说明
            
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        <li class="chapter " data-level="5.1.3" data-path="../chapter03/DesignAndUse.html">
            
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                    概念，设计和使用模板
            
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        <li class="chapter " data-level="5.1.4" data-path="../chapter03/NamingRules.html">
            
                <a href="../chapter03/NamingRules.html">
            
                    
                    命名规则
            
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        <li class="chapter " data-level="5.1.5" data-path="../chapter03/Other.html">
            
                <a href="../chapter03/Other.html">
            
                    
                    其它模板说明
            
                </a>
            

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            </ul>
            
        </li>
    

        <li class="divider"></li>
        
        
        <li class="chapter " data-level="6.1" data-path="../chapter04/">
            
                <a href="../chapter04/">
            
                    
                    第四章 模板引擎介绍
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="6.1.1" data-path="../chapter04/CoreDoc.html">
            
                <a href="../chapter04/CoreDoc.html">
            
                    
                    核心文件
            
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        <li class="chapter " data-level="6.1.2" data-path="../chapter04/Grammar.html">
            
                <a href="../chapter04/Grammar.html">
            
                    
                    模板语法
            
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        <li class="chapter " data-level="6.1.3" data-path="../chapter04/LabelCategory.html">
            
                <a href="../chapter04/LabelCategory.html">
            
                    
                    标签分类
            
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            </ul>
            
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        <li class="divider"></li>
        
        
        <li class="chapter " data-level="7.1" >
            
                <span>
            
                    
                    第五章 标签参考
            
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            <ul class="articles">
                
    
        <li class="chapter " data-level="7.1.1" >
            
                <span>
            
                    
                    ▶全局标签
            
                </span>
            

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        <li class="chapter " data-level="7.1.2" data-path="GlobalLabel.html">
            
                <a href="GlobalLabel.html">
            
                    
                    Global全局配置标签
            
                </a>
            

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        <li class="chapter " data-level="7.1.3" data-path="VariableLabel.html">
            
                <a href="VariableLabel.html">
            
                    
                    Variable全局变量标签
            
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        <li class="chapter " data-level="7.1.4" data-path="TemplateLabel.html">
            
                <a href="TemplateLabel.html">
            
                    
                    Template模版路径标签
            
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        <li class="chapter " data-level="7.1.5" data-path="IncludeLabel.html">
            
                <a href="IncludeLabel.html">
            
                    
                    Include引入文件标签
            
                </a>
            

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        <li class="chapter " data-level="7.1.6" data-path="TypeLabel.html">
            
                <a href="TypeLabel.html">
            
                    
                    Type栏目调用标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.7" data-path="ChannelLabel.html">
            
                <a href="ChannelLabel.html">
            
                    
                    Channel频道列表标签
            
                </a>
            

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        <li class="chapter " data-level="7.1.8" data-path="ListLabel.html">
            
                <a href="ListLabel.html">
            
                    
                    List文章列表标签
            
                </a>
            

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        <li class="chapter " data-level="7.1.9" data-path="CategoryArtListLabel.html">
            
                <a href="CategoryArtListLabel.html">
            
                    
                    CategoryArtListLabel栏目内容列表标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.10" data-path="TagLabel.html">
            
                <a href="TagLabel.html">
            
                    
                    TagLabel标签列表标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.11" data-path="TreeLabel.html">
            
                <a href="TreeLabel.html">
            
                    
                    TreeLabel栏目树标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.12" data-path="AttachmentLabel.html">
            
                <a href="AttachmentLabel.html">
            
                    
                    AttachmentLabel附件标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.13" data-path="SqlLabel.html">
            
                <a href="SqlLabel.html">
            
                    
                    SqlLabel SQL标签
            
                </a>
            

        </li>
    
        <li class="chapter active" data-level="7.1.14" data-path="IfLabel.html">
            
                <a href="IfLabel.html">
            
                    
                    IfLabel判断标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.15" >
            
                <span>
            
                    
                    ▶分页标签
            
                </span>
            

        </li>
    
        <li class="chapter " data-level="7.1.16" data-path="CategoryLabel.html">
            
                <a href="CategoryLabel.html">
            
                    
                    Category分页栏目标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.17" data-path="TopCategoryLabel.html">
            
                <a href="TopCategoryLabel.html">
            
                    
                    TopCategory分页顶级栏目标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.18" data-path="LocationLabel.html">
            
                <a href="LocationLabel.html">
            
                    
                    Location当前位置标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.19" >
            
                <span>
            
                    
                    ▶列表标签
            
                </span>
            

        </li>
    
        <li class="chapter " data-level="7.1.20" data-path="PageListLabel.html">
            
                <a href="PageListLabel.html">
            
                    
                    PageList文章分页标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.21" data-path="PaginationLabel.html">
            
                <a href="PaginationLabel.html">
            
                    
                    Pagination显示分页标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.22" >
            
                <span>
            
                    
                    ▶内容标签
            
                </span>
            

        </li>
    
        <li class="chapter " data-level="7.1.23" data-path="ArticleLabel.html">
            
                <a href="ArticleLabel.html">
            
                    
                    Article文章页标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.1.24" data-path="PrevNextLabel.html">
            
                <a href="PrevNextLabel.html">
            
                    
                    PrevNext上一篇、下一篇标签
            
                </a>
            

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            </ul>
            
        </li>
    
        <li class="chapter " data-level="7.2" data-path="../chapter06/DataBase.html">
            
                <a href="../chapter06/DataBase.html">
            
                    
                    第六章 数据库
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.3" >
            
                <span>
            
                    
                    第七章 模板扩展
            
                </span>
            

            <ul class="articles">
                
    
        <li class="chapter " data-level="7.3.1" data-path="../chapter07/Message.html">
            
                <a href="../chapter07/Message.html">
            
                    
                    留言投稿
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.3.2" data-path="../chapter07/Search.html">
            
                <a href="../chapter07/Search.html">
            
                    
                    网站搜索
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.3.3" data-path="../chapter07/DefineLabel.html">
            
                <a href="../chapter07/DefineLabel.html">
            
                    
                    定义标签
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.3.4" data-path="../chapter07/Regexp.html">
            
                <a href="../chapter07/Regexp.html">
            
                    
                    正则工具类
            
                </a>
            

        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="7.4" >
            
                <span>
            
                    
                    第八章 部署上线
            
                </span>
            

            <ul class="articles">
                
    
        <li class="chapter " data-level="7.4.1" data-path="../chapter08/Environment.html">
            
                <a href="../chapter08/Environment.html">
            
                    
                    环境准备
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.4.2" data-path="../chapter08/Packaging.html">
            
                <a href="../chapter08/Packaging.html">
            
                    
                    应用打包
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.4.3" data-path="../chapter08/Online.html">
            
                <a href="../chapter08/Online.html">
            
                    
                    项目上线
            
                </a>
            

        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="7.5" >
            
                <span>
            
                    
                    第九章 常见问题
            
                </span>
            

            <ul class="articles">
                
    
        <li class="chapter " data-level="7.5.1" data-path="../chapter09/Business.html">
            
                <a href="../chapter09/Business.html">
            
                    
                    商业授权
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.2" data-path="../chapter09/ResourceDir.html">
            
                <a href="../chapter09/ResourceDir.html">
            
                    
                    资源目录
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.3" data-path="../chapter09/RichTextEditor.html">
            
                <a href="../chapter09/RichTextEditor.html">
            
                    
                    富文本编辑器
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.4" data-path="../chapter09/NavActive.html">
            
                <a href="../chapter09/NavActive.html">
            
                    
                    导航Active
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.5" data-path="../chapter09/CategoryPage.html">
            
                <a href="../chapter09/CategoryPage.html">
            
                    
                    栏目分页
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.6" data-path="../chapter09/CategoryFilter.html">
            
                <a href="../chapter09/CategoryFilter.html">
            
                    
                    多级栏目筛选
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.7" data-path="../chapter09/MutipleLanguage.html">
            
                <a href="../chapter09/MutipleLanguage.html">
            
                    
                    多语言网站
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.8" data-path="../chapter09/UploadContrl.html">
            
                <a href="../chapter09/UploadContrl.html">
            
                    
                    上传大小控制
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.9" data-path="../chapter09/ResourceNotFound.html">
            
                <a href="../chapter09/ResourceNotFound.html">
            
                    
                    上线图片404
            
                </a>
            

        </li>
    
        <li class="chapter " data-level="7.5.10" data-path="../chapter09/Favicon.html">
            
                <a href="../chapter09/Favicon.html">
            
                    
                    站点Favicon
            
                </a>
            

        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="7.6" >
            
                <span>
            
                    
                    第十章 关于捐赠
            
                </span>
            

            <ul class="articles">
                
    
        <li class="chapter " data-level="7.6.1" data-path="../chapter10/DonationList.html">
            
                <a href="../chapter10/DonationList.html">
            
                    
                    授权和捐赠
            
                </a>
            

        </li>
    

            </ul>
            
        </li>
    

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<h3 id="if&#x5224;&#x65AD;&#x6807;&#x7B7E;"><a name="if&#x5224;&#x65AD;&#x6807;&#x7B7E;" class="plugin-anchor" href="#if&#x5224;&#x65AD;&#x6807;&#x7B7E;"><i class="fa fa-link" aria-hidden="true"></i></a>If&#x5224;&#x65AD;&#x6807;&#x7B7E;</h3>
<h4 id="&#x9002;&#x7528;&#x7248;&#x672C;"><a name="&#x9002;&#x7528;&#x7248;&#x672C;" class="plugin-anchor" href="#&#x9002;&#x7528;&#x7248;&#x672C;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x9002;&#x7528;&#x7248;&#x672C;</h4>
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Previous_Releases_2.0.0 + 
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<h4 id="&#x540D;&#x79F0;"><a name="&#x540D;&#x79F0;" class="plugin-anchor" href="#&#x540D;&#x79F0;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x540D;&#x79F0;</h4>
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&#x5224;&#x65AD;&#x6807;&#x7B7E;
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<h4 id="&#x529F;&#x80FD;"><a name="&#x529F;&#x80FD;" class="plugin-anchor" href="#&#x529F;&#x80FD;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x529F;&#x80FD;</h4>
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&#x7528;&#x4E8E;&#x5728;&#x9875;&#x9762;&#x4E2D;&#x4F5C;&#x7B80;&#x5355;&#x7684;&#x5224;&#x65AD;&#xFF0C;&#x76EE;&#x524D;&#x53EA;&#x652F;&#x6301;eq&#x548C;neq&#xFF0C;&#x4E14;&#x53EA;&#x7528;&#x4E8E;&#x5728;categoryartlist&#x6807;&#x7B7E;&#x5185;&#x4F7F;&#x7528;&#x3002;
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<pre><code class="lang-html?linenums">{dreamer-cms:if test=&quot;(&apos;false&apos; eq [field:haschildren/])&quot;}
    &lt;li&gt;&lt;a ref=&quot;[field:typeurl /]&quot; title=&quot;[field:typenamecn /]&quot;&gt;[field:typenamecn /]&lt;/a&gt;&lt;/li&gt;
 {/dreamer-cms:if}
</code></pre>
<h4 id="&#x6587;&#x4EF6;"><a name="&#x6587;&#x4EF6;" class="plugin-anchor" href="#&#x6587;&#x4EF6;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x6587;&#x4EF6;</h4>
<pre><code class="lang-java?linenums">cc.iteachyou.cms.taglib.tags.IfTag
</code></pre>
<h4 id="&#x53C2;&#x6570;"><a name="&#x53C2;&#x6570;" class="plugin-anchor" href="#&#x53C2;&#x6570;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x53C2;&#x6570;</h4>
<table>
<thead>
<tr>
<th style="text-align:center">&#x53C2;&#x6570;&#x540D;</th>
<th style="text-align:left">&#x63CF;&#x8FF0;</th>
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<td style="text-align:center">test</td>
<td style="text-align:left">&#x8868;&#x8FBE;&#x5F0F;&#xFF08;&#x6CE8;&#xFF1A;&#x4E00;&#x5B9A;&#x8981;&#x7528;&#x5C0F;&#x62EC;&#x53F7;&#x5305;&#x88F9;&#xFF0C;&#x76EE;&#x524D;&#x53EA;&#x652F;&#x6301;eq&#x548C;neq&#x3002;&#xFF09;</td>
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<h4 id="&#x5E95;&#x5C42;&#x5B57;&#x6BB5;"><a name="&#x5E95;&#x5C42;&#x5B57;&#x6BB5;" class="plugin-anchor" href="#&#x5E95;&#x5C42;&#x5B57;&#x6BB5;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x5E95;&#x5C42;&#x5B57;&#x6BB5;</h4>
<p>&#x65E0;</p>
<h4 id="&#x8303;&#x4F8B;"><a name="&#x8303;&#x4F8B;" class="plugin-anchor" href="#&#x8303;&#x4F8B;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x8303;&#x4F8B;</h4>
<pre><code class="lang-html?linenums">{dreamer-cms:categoryartlist length=&quot;1&quot;}
    {dreamer-cms:if test=&quot;(&apos;true&apos; eq [field:haschildren/])&quot;}
    &lt;li class=&quot;dropdown nav-item&quot;&gt;&lt;a href=&quot;[field:typeurl/]&quot; class=&quot;nav-link dropdown-toggle&quot; data-toggle=&quot;dropdown&quot;&gt;[field:typenamecn /]&lt;/a&gt;
        &lt;ul class=&quot;dropdown-menu&quot;&gt;
            {dreamer-cms:channel}
            &lt;li&gt;&lt;a class=&quot;dropdown-item&quot; href=&quot;[field:typeurl/]&quot;&gt;&lt;i class=&quot;ion ion-chevron-right&quot;&gt;&lt;/i&gt;[field:typenamecn /]&lt;/a&gt;&lt;/li&gt;
            {/dreamer-cms:channel}
        &lt;/ul&gt;
    &lt;/li&gt;
    {/dreamer-cms:if}
    {dreamer-cms:if test=&quot;(&apos;false&apos; eq [field:haschildren/])&quot;}
    &lt;li class=&quot;nav-item&quot;&gt;&lt;a class=&quot;nav-link scroll&quot; href=&quot;[field:typeurl /]&quot; title=&quot;[field:typenamecn /]&quot;&gt;[field:typenamecn /]&lt;/a&gt;&lt;/li&gt;
    {/dreamer-cms:if}
{/dreamer-cms:categoryartlist}
</code></pre>
<h4 id="&#x6548;&#x679C;"><a name="&#x6548;&#x679C;" class="plugin-anchor" href="#&#x6548;&#x679C;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x6548;&#x679C;</h4>
<p>&#x65E0;</p>

                                
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