JavaWeb_01_html基本学习

*:first-child {
margin-top: 0 !important;
}

.markdown-body>*:last-child {
margin-bottom: 0 !important;
}

.markdown-body .headeranchor-link {
position: absolute;
top: 0;
bottom: 0;
left: 0;
display: block;
padding-right: 6px;
padding-left: 30px;
margin-left: -30px;
}

.markdown-body .headeranchor-link:focus {
outline: none;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
position: relative;
margin-top: 1em;
margin-bottom: 16px;
font-weight: bold;
line-height: 1.4;
}

.markdown-body h1 .headeranchor,
.markdown-body h2 .headeranchor,
.markdown-body h3 .headeranchor,
.markdown-body h4 .headeranchor,
.markdown-body h5 .headeranchor,
.markdown-body h6 .headeranchor {
display: none;
color: #000;
vertical-align: middle;
}

.markdown-body h1:hover .headeranchor-link,
.markdown-body h2:hover .headeranchor-link,
.markdown-body h3:hover .headeranchor-link,
.markdown-body h4:hover .headeranchor-link,
.markdown-body h5:hover .headeranchor-link,
.markdown-body h6:hover .headeranchor-link {
height: 1em;
padding-left: 8px;
margin-left: -30px;
line-height: 1;
text-decoration: none;
}

.markdown-body h1:hover .headeranchor-link .headeranchor,
.markdown-body h2:hover .headeranchor-link .headeranchor,
.markdown-body h3:hover .headeranchor-link .headeranchor,
.markdown-body h4:hover .headeranchor-link .headeranchor,
.markdown-body h5:hover .headeranchor-link .headeranchor,
.markdown-body h6:hover .headeranchor-link .headeranchor {
display: inline-block;
}

.markdown-body h1 {
padding-bottom: 0.3em;
font-size: 2.25em;
line-height: 1.2;
border-bottom: 1px solid #eee;
}

.markdown-body h2 {
padding-bottom: 0.3em;
font-size: 1.75em;
line-height: 1.225;
border-bottom: 1px solid #eee;
}

.markdown-body h3 {
font-size: 1.5em;
line-height: 1.43;
}

.markdown-body h4 {
font-size: 1.25em;
}

.markdown-body h5 {
font-size: 1em;
}

.markdown-body h6 {
font-size: 1em;
color: #777;
}

.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre,
.markdown-body .admonition {
margin-top: 0;
margin-bottom: 16px;
}

.markdown-body hr {
height: 4px;
padding: 0;
margin: 16px 0;
background-color: #e7e7e7;
border: 0 none;
}

.markdown-body ul,
.markdown-body ol {
padding-left: 2em;
}

.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
margin-top: 0;
margin-bottom: 0;
}

.markdown-body li>p {
margin-top: 16px;
}

.markdown-body dl {
padding: 0;
}

.markdown-body dl dt {
padding: 0;
margin-top: 16px;
font-size: 1em;
font-style: italic;
font-weight: bold;
}

.markdown-body dl dd {
padding: 0 16px;
margin-bottom: 16px;
}

.markdown-body blockquote {
padding: 0 15px;
color: #777;
border-left: 4px solid #ddd;
}

.markdown-body blockquote>:first-child {
margin-top: 0;
}

.markdown-body blockquote>:last-child {
margin-bottom: 0;
}

.markdown-body table {
display: block;
width: 100%;
overflow: auto;
word-break: normal;
word-break: keep-all;
}

.markdown-body table th {
font-weight: bold;
}

.markdown-body table th,
.markdown-body table td {
padding: 6px 13px;
border: 1px solid #ddd;
}

.markdown-body table tr {
background-color: #fff;
border-top: 1px solid #ccc;
}

.markdown-body table tr:nth-child(2n) {
background-color: #f8f8f8;
}

.markdown-body img {
max-width: 100%;
-moz-box-sizing: border-box;
box-sizing: border-box;
}

.markdown-body code,
.markdown-body samp {
padding: 0;
padding-top: 0.2em;
padding-bottom: 0.2em;
margin: 0;
font-size: 85%;
background-color: rgba(0,0,0,0.04);
border-radius: 3px;
}

.markdown-body code:before,
.markdown-body code:after {
letter-spacing: -0.2em;
content: "\00a0";
}

.markdown-body pre>code {
padding: 0;
margin: 0;
font-size: 100%;
word-break: normal;
white-space: pre;
background: transparent;
border: 0;
}

.markdown-body .codehilite {
margin-bottom: 16px;
}

.markdown-body .codehilite pre,
.markdown-body pre {
padding: 16px;
overflow: auto;
font-size: 85%;
line-height: 1.45;
background-color: #f7f7f7;
border-radius: 3px;
}

.markdown-body .codehilite pre {
margin-bottom: 0;
word-break: normal;
}

.markdown-body pre {
word-wrap: normal;
}

.markdown-body pre code {
display: inline;
max-width: initial;
padding: 0;
margin: 0;
overflow: initial;
line-height: inherit;
word-wrap: normal;
background-color: transparent;
border: 0;
}

.markdown-body pre code:before,
.markdown-body pre code:after {
content: normal;
}

/* Admonition */
.markdown-body .admonition {
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
position: relative;
border-radius: 3px;
border: 1px solid #e0e0e0;
border-left: 6px solid #333;
padding: 10px 10px 10px 30px;
}

.markdown-body .admonition table {
color: #333;
}

.markdown-body .admonition p {
padding: 0;
}

.markdown-body .admonition-title {
font-weight: bold;
margin: 0;
}

.markdown-body .admonition>.admonition-title {
color: #333;
}

.markdown-body .attention>.admonition-title {
color: #a6d796;
}

.markdown-body .caution>.admonition-title {
color: #d7a796;
}

.markdown-body .hint>.admonition-title {
color: #96c6d7;
}

.markdown-body .danger>.admonition-title {
color: #c25f77;
}

.markdown-body .question>.admonition-title {
color: #96a6d7;
}

.markdown-body .note>.admonition-title {
color: #d7c896;
}

.markdown-body .admonition:before,
.markdown-body .attention:before,
.markdown-body .caution:before,
.markdown-body .hint:before,
.markdown-body .danger:before,
.markdown-body .question:before,
.markdown-body .note:before {
font: normal normal 16px fontawesome-mini;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
line-height: 1.5;
color: #333;
position: absolute;
left: 0;
top: 0;
padding-top: 10px;
padding-left: 10px;
}

.markdown-body .admonition:before {
content: "\f056\00a0";
color: 333;
}

.markdown-body .attention:before {
content: "\f058\00a0";
color: #a6d796;
}

.markdown-body .caution:before {
content: "\f06a\00a0";
color: #d7a796;
}

.markdown-body .hint:before {
content: "\f05a\00a0";
color: #96c6d7;
}

.markdown-body .danger:before {
content: "\f057\00a0";
color: #c25f77;
}

.markdown-body .question:before {
content: "\f059\00a0";
color: #96a6d7;
}

.markdown-body .note:before {
content: "\f040\00a0";
color: #d7c896;
}

.markdown-body .admonition::after {
content: normal;
}

.markdown-body .attention {
border-left: 6px solid #a6d796;
}

.markdown-body .caution {
border-left: 6px solid #d7a796;
}

.markdown-body .hint {
border-left: 6px solid #96c6d7;
}

.markdown-body .danger {
border-left: 6px solid #c25f77;
}

.markdown-body .question {
border-left: 6px solid #96a6d7;
}

.markdown-body .note {
border-left: 6px solid #d7c896;
}

.markdown-body .admonition>*:first-child {
margin-top: 0 !important;
}

.markdown-body .admonition>*:last-child {
margin-bottom: 0 !important;
}

/* progress bar*/
.markdown-body .progress {
display: block;
width: 300px;
margin: 10px 0;
height: 24px;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
background-color: #ededed;
position: relative;
box-shadow: inset -1px 1px 3px rgba(0, 0, 0, .1);
}

.markdown-body .progress-label {
position: absolute;
text-align: center;
font-weight: bold;
width: 100%; margin: 0;
line-height: 24px;
color: #333;
text-shadow: 1px 1px 0 #fefefe, -1px -1px 0 #fefefe, -1px 1px 0 #fefefe, 1px -1px 0 #fefefe, 0 1px 0 #fefefe, 0 -1px 0 #fefefe, 1px 0 0 #fefefe, -1px 0 0 #fefefe, 1px 1px 2px #000;
-webkit-font-smoothing: antialiased !important;
white-space: nowrap;
overflow: hidden;
}

.markdown-body .progress-bar {
height: 24px;
float: left;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
background-color: #96c6d7;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), inset 0 -1px 0 rgba(0, 0, 0, .1);
background-size: 30px 30px;
background-image: -webkit-linear-gradient(
135deg, rgba(255, 255, 255, .4) 27%,
transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%,
transparent 77%, transparent
);
background-image: -moz-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: -ms-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: -o-linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
background-image: linear-gradient(
135deg,
rgba(255, 255, 255, .4) 27%, transparent 27%,
transparent 52%, rgba(255, 255, 255, .4) 52%,
rgba(255, 255, 255, .4) 77%, transparent 77%,
transparent
);
}

.markdown-body .progress-100plus .progress-bar {
background-color: #a6d796;
}

.markdown-body .progress-80plus .progress-bar {
background-color: #c6d796;
}

.markdown-body .progress-60plus .progress-bar {
background-color: #d7c896;
}

.markdown-body .progress-40plus .progress-bar {
background-color: #d7a796;
}

.markdown-body .progress-20plus .progress-bar {
background-color: #d796a6;
}

.markdown-body .progress-0plus .progress-bar {
background-color: #c25f77;
}

.markdown-body .candystripe-animate .progress-bar{
-webkit-animation: animate-stripes 3s linear infinite;
-moz-animation: animate-stripes 3s linear infinite;
animation: animate-stripes 3s linear infinite;
}

@-webkit-keyframes animate-stripes {
0% {
background-position: 0 0;
}

100% {
background-position: 60px 0;
}
}

@-moz-keyframes animate-stripes {
0% {
background-position: 0 0;
}

100% {
background-position: 60px 0;
}
}

@keyframes animate-stripes {
0% {
background-position: 0 0;
}

100% {
background-position: 60px 0;
}
}

.markdown-body .gloss .progress-bar {
box-shadow:
inset 0 4px 12px rgba(255, 255, 255, .7),
inset 0 -12px 0 rgba(0, 0, 0, .05);
}

/* Multimarkdown Critic Blocks */
.markdown-body .critic_mark {
background: #ff0;
}

.markdown-body .critic_delete {
color: #c82829;
text-decoration: line-through;
}

.markdown-body .critic_insert {
color: #718c00 ;
text-decoration: underline;
}

.markdown-body .critic_comment {
color: #8e908c;
font-style: italic;
}

.markdown-body .headeranchor {
font: normal normal 16px octicons-anchor;
line-height: 1;
display: inline-block;
text-decoration: none;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}

.headeranchor:before {
content: '\f05c';
}

.markdown-body .task-list-item {
list-style-type: none;
}

.markdown-body .task-list-item+.task-list-item {
margin-top: 3px;
}

.markdown-body .task-list-item input {
margin: 0 4px 0.25em -20px;
vertical-align: middle;
}

/* Media */
@media only screen and (min-width: 480px) {
.markdown-body {
font-size:14px;
}
}

@media only screen and (min-width: 768px) {
.markdown-body {
font-size:16px;
}
}

@media print {
.markdown-body * {
background: transparent !important;
color: black !important;
filter:none !important;
-ms-filter: none !important;
}

.markdown-body {
font-size:12pt;
max-width:100%;
outline:none;
border: 0;
}

.markdown-body a,
.markdown-body a:visited {
text-decoration: underline;
}

.markdown-body .headeranchor-link {
display: none;
}

.markdown-body a[href]:after {
content: " (" attr(href) ")";
}

.markdown-body abbr[title]:after {
content: " (" attr(title) ")";
}

.markdown-body .ir a:after,
.markdown-body a[href^="javascript:"]:after,
.markdown-body a[href^="#"]:after {
content: "";
}

.markdown-body pre {
white-space: pre;
white-space: pre-wrap;
word-wrap: break-word;
}

.markdown-body pre,
.markdown-body blockquote {
border: 1px solid #999;
padding-right: 1em;
page-break-inside: avoid;
}

.markdown-body .progress,
.markdown-body .progress-bar {
-moz-box-shadow: none;
-webkit-box-shadow: none;
box-shadow: none;
}

.markdown-body .progress {
border: 1px solid #ddd;
}

.markdown-body .progress-bar {
height: 22px;
border-right: 1px solid #ddd;
}

.markdown-body tr,
.markdown-body img {
page-break-inside: avoid;
}

.markdown-body img {
max-width: 100% !important;
}

.markdown-body p,
.markdown-body h2,
.markdown-body h3 {
orphans: 3;
widows: 3;
}

.markdown-body h2,
.markdown-body h3 {
page-break-after: avoid;
}
}
-->

JavaWeb01_html basic

html操作思想

使用标签把要操作的数据包起来，通过修改标签的属性值，来实现标签内数据样式的变化

font标签

属性：size取值范围1-7 color：英文单词，十六进制数 #ffffff

标题标签 `<h1> </h1> ... <h6> </h6>`

从h1到h6越来越小，自动换行

注释

列表标签

<dl> <dt></dt> <dd></dd> </dl>
有序
无序

图像标签

<img src="图片的路径" width="" height="" alt="" />
alt:浏览器的兼容性很差

路径（相对路径）

超链接标签

<a href="路径">显示在页面上的内容</a>

打开方式 target=”_self _blank”
默认是在当前页面打开

表格标签

<table>

    <tr>

        <td></td>

        <th></th>   <!--加粗和居中-->

    </tr>

</table>

html的五个规范

一个html文件开始标签和结束的标签<html>和</html>
html包含两部分内容
- <head>设置相关信息</head>
- <body>显示在页面上的内容都写在body里面</body>
html的标签是成对的
html的代码不区分大小写
有些标签，在标签内结束。比如换行:<br /> 分割线:<hr />

表单标签

可以提交数据到服务器，这个过程可以用表单标签实现
<form>和</form>
- action:提交到地址，默认提交到当前页面
- method:表单的提交方式
  - 常用的有两种 get和post get默认就是get请求
- enctype: 一般请求下不需要这个属性，做文件上传时候需要设置这个属性
- 面试题目：get和post区别
  - get请求地址栏会携带提交的数据，post不会携带
  - get请求安全级别较低，post较高
  - get请求数据大小的限制，post没有限制
输入项：可以输入内容过选择内容的部分
- 大部分的输入项使用 <input type="输入项的类型"/>
  - 普通输入项：<input type="text"/>
  - 密码输入项：<input type="password"/>
  - 单选输入项：<input type="radio"/>
    -> 在里面需要属性name
    -> name的属性值必须要相同
    -> 必须有一个value值
  - 复选输入项：<input type="checkbox"/>
    -> 在里面需要属性name
    -> name的属性值必须要相同
    -> 必须有一个value值
  - 文件输入项（在后面上传时侯用到）
    -> <input type="file"/>
  - 下拉输入项（不是在input标签里面的）
```
<select name="birth">

    <option value="0">请选择</option>

    <option value="1991">1991</option>

    <option value="1991">1992</option>

    <option value="1991">1993</option>

    <option value="1991">1994</option>

</select>
```
  - 文本域
    <textarea cols="10" rows=""></textarea>
  - 隐藏项（不会显示在页面上，但是存在于html代码里面）
    <input type="hidden"/>
  - 提交按钮
    <input type="submit"/>
    <input type="submit" value="注册"/>
  - 使用图片提交
    <input type="image" src="a.jpg"/>

html中其它的常用标签的使用

b –加粗
s –删除线
u –下划线
i –斜体
pre –原样输出
sub和sup –下标和上标
div –自动换行
span –在一行显示

html头标签的使用

html两部分组成 head和body
- 在head里面的标签就是头标签
- title标签：表示在标签上显示的内容
- <meta>标签：设置页面的一些相关的内容
  - <meta name="keywords" content="学习,熊出没"> –以前的搜索引擎检索方式
  - <meta http-equiv="refresh" content="3; url=https://baidu.com"/> –三秒跳转
- base标签：设置超链接的基本设置
  - 可以统一设置超链接的打开方式<base target="_blank" /> –设置全文超链接以新窗口打开
- link标签：引入外部文件
  - 可以使用link标签引入css文件

框架标签的使用

使用框架标签的时候，不能写在body里面，使用了框架标签，需要把body去掉

<frameset>标签
- rows:按照行进行划分 <frameset rows="80, *">
- cols:按照列进行划分 <frameset cols="80, *">
<frame>标签
- 具体显示的页面
  - <frame name="lower_left" src="b.html">

后记

以上内容只是个人学习的记录，其他未涉及的内容都可以在网络上或手册上查找的到。

另：此笔记是由markdown编写，用sublime编译成的html文档