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Web学习之HTML_html/css_WEB-ITnose

Jun 24, 2016 am 11:38 AM

在介绍HTML之前,我想先说说Web,就是我们经常所说的互联网,web的页面就是一个网页,或者说是一种文档,而这种文档是从何而来的那?紧接着,HTML就要出厂了。

一、Web与HTML

Web是互联网的总称,Wbe的本意是蜘蛛网或网的意思,在网页设计中我们称为网页的意思。现广泛译作网络、互联网等技术领域,其表现形式为:超文本(hypertext)超媒体(hypermedia)、超文本传输协议(HTTP)。

HTML(Hypertext Markup Language):超文本标记语言,是一种编写网页的语言。

网页的本质就是超级文本标记语言,通过结合使用其他的Web技术(如:脚本语言、公共网关接口、组件等),可以创造出功能强大的网页。因而,超级文本标记语言是万维网(Web)编程的基础,也就是说万维网是建立在超文本基础之上的。超级文本标记语言之所以称为超文本标记语言,是因为文本中包含了所谓“超级链接”点。

二、Web工作原理

1、输入网址:当你想进入万维网上一个网页代码,或者其他网络资源的时候,通常你要首先在你的浏览器上键入你想访问网页的统一资源定位符(UniformResource Locator),也就是我们现在通常所说的网址,或者通过超链接方式链接到那个网页或网络资源。

2、解析网址:之后的工作是URL的服务器名部分,被名为域名系统的分布于全球的因特网数据库将你输入的网址解析,并根据解析结果决定进入哪一个IP“网络协议”地址(IP address)。接下来的步骤是为所要访问的网页,向在那个IP地址工作的服务器发送一个HTTP请求。在通常情况下,HTML文本、图片和构成该网页的一切其他文件很快会被逐一请求并发送回用户。

3、浏览器呈现:网络浏览器接下来的工作是把HTML、CSS和其他接受到的文件所描述的内容,加上图像、链接和其他必须的资源,显示给用户。这些就构成了你所看到的网页。

三、HTML基础知识

1、导图总结

 

对HTML的学习,我先从宏观和微观上把控了一下,从宏观上来说,HTML的知识包括文档、标签、表、还有超链接。从微观上来说那,文字特效组成网页的一些基本元素就是一些空元素、内容元素、熟悉元素等这三种元素组合起来的一种文档。

标签有控制段落用的,也有控制文本用的,表分为表格,列表(想数字列表,图形列表),还有表单。表单的功能非常强大,他能控制网页上面控件的类型,这个类型用标签的type属性控制。

HTML的一些知识在牛腩新闻发布系统中用到了很多,到现在总算有了一个共鸣。

四、小结

如果将web比喻成一个很大的资料库的话,这个资料库中就有许多文件,而HTML就是编写这些文件的一种工具之一。HTML??超文本标记语言,它将书写Web世界的各种篇章。

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