目录
一、什么是HTML
二、HTML的基本结构：
三、结构与属性：
四、常见标签：
一、什么是HTML
HTML：超文本标记语言(HyperText Markup Language)
超文本：指的是网页中可以显示的内容(图片，超链接，视频…)
标记语言：标记–>标签(标注)买东西–>商品标签(价格，材质，型号…)
标记语言中，就是提供了许多的标签,不同标签有不同的功能，
最终运行时，由浏览器对标前进行解析，最终呈现出不同标签的样子
二、HTML的基本结构：
ARuiiiiiii
1.:声明html语言的版本 html5
2.:html标签是标记语言中根标签
3.:head 为标签头
4.:是设定编码形式，UTF-8 就是在互联网上使用最广的一种 Unicode 的实现方式。
5.</strong>:title是设置标题</p><p><strong>6.</strong>:网页身体，可以在其中编写可见所需内容</p><h3>三、结构与属性：</h3><p>在讲常用标签之前，来解释一下标签相关知识点：</p><p><strong>标签结构:</strong><br /> 标签体双标签<br /> 自闭合标签，没有修饰的内容，只是完成某个功能单标签</p><p><strong>注意：双标签的”/”在结束标签之前，单标签”/”在标签名之后</strong></p><p><strong></strong></p><pre><code class="language-html"><b>aaa</b><br /></code></pre><p><strong>标签的属性:</strong></p><p>可以通过改变标签属性，设置标签显示的格式<br /> 属性必须写在开始标签中<br /> 属性格式 属性名=”值”<br /> 一个标签中可以写多个属性</p><p>例如：</p><pre><code class="language-html"><font color="blue" size="4">百度</font></code></pre><p>就是设定标签体(即：百度)的颜色和大小</p><p>标签也可改变属性：</p><pre><code class="language-html"></code></pre><p>bgcolor=”blue”即将整个网页背景改为蓝色</p><h3>四、常见标签：</h3><p><strong>1.标题标签：</strong></p><p><h1></h1><p>…</p><h6></h6><p> 每一个标题标签会独占一行<br /> align=”” 控制标签内容在标签体中水平对齐方式(align=”center”即水平居中)</p><pre><code class="language-html"><h1>一级标题</h1><h2>二级标题</h2><h3>三级标题</h3><h1 align="center"><font>1级标签</font></h1><h2 align="right">2级标签</h2></code></pre><p>图示：</p><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/79e60278612d427d8b718c8e903691a7.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' data-src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/79e60278612d427d8b718c8e903691a7.png" /></p><p> <strong> 2.标尺线：</strong>换行标签</p><hr /><p>用于换行加分割线</p><p><strong>3.段落标签：</strong></p><pre><code class="language-html"><hr /><p>二叉搜索树是一种数据结构，用于存储数据并支持快速的插入、删除和搜索操作。它是一种树形结构。</p><p>二叉搜索树的高效性与其关键字的特性密切相关。</p></code></pre><p>图示：</p><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/070bc342dc884dca9352a0a8784d7950.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' data-src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/070bc342dc884dca9352a0a8784d7950.png" /></p><p><strong>4.列表：</strong></p><p>无序列表：</p><ul></ul></p><p>即标签体呈现的内容前没有序号，自动换行</p><p>有序列表：</p><ol></ol></p><p>即标签体呈现的内容前有序号，自动换行</p><pre><code class="language-html">列表无序列表<ul type="square"><li>列表1</li><li>列表2</li><li>列表3</li><li>列表4</li></ul>有序列表<ol><li>列表5</li><li>列表6</li><li>列表7</li><li>列表8</li></ol></code></pre><p>图示：</p><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/4b66452ea1934530a846711612b7a7b9.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' data-src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/4b66452ea1934530a846711612b7a7b9.png" /></p><p><strong>5.超链接：</strong></p><p>:HTML 使用超级链接与网络上的另一个文档相连，通俗的说就是通过连接来访问其他网页资源</p><p>href=”网页的地址”<br /> target=”_blank”在新窗口打开目标网页<br /> target=”_self”在当前窗口打开一个新网页 （target:默认值为_self）</p><pre><code class="language-html">百度</code></pre><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/0b388ff7adb241abbf685803e8d72917.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' data-src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/0b388ff7adb241abbf685803e8d72917.png" /></p><p>点击标签体“百度”后就会跳到地址对应的页面</p><p>6.图像标签：</p><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/e894d09e3e7f43aea26f2f7cada1590a.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' data-src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/e894d09e3e7f43aea26f2f7cada1590a.png" /></p><p>7.特殊符号转义：</p><p>在HTML中预留了一些字符，这些预留字符是不能在网页中直接使用的，例如空格或一些特殊标志。</p><p>1）<和&bt：分别代表符号“”</p><p>2） 代表一个空格</p><p>3）®表示注册商标</p><p>4）©表示版权</p><pre><code class="language-html"><b>标签的功能是加粗文字<hr />®©</code></pre><p>图示：</p><p><noscript><img decoding="async" class="aligncenter" src="https://img.maxssl.com/uploads/?url=https://img-blog.csdnimg.cn/direct/9b7a5255fcb5405fa0ce87c89e14e1ee.png" /></noscript><img decoding="async" class="lazyload aligncenter" src='data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E' 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