1,绝对布局（其核心思想定义一个父级容器为子类相对其进行定位,不建议在项目中使用该布局方式）
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>绝对定位实现三列布局</title>
</head>
<style>
body
{
margin: 0px;
padding: 0px;
/*background-color: lightgray;*/
}
.header ,.footer
{
width: 100%;
height: 60px;
background-color: lightgray;
}
.content
{
width: 1000px;
min-height: 100%;
background-color: gray;
margin: auto;
text-align: center;
line-height: 60px;
}
/*将绝对定位 main父级定位*/
.main
{
position: relative;
width: 1000px;
height: 650px;
background-color: wheat;
margin: auto;
}
.left{
position: absolute;
min-height: 100%;
background-color: lightgreen;
top:0px;
left: 0px;
width: 200px;
}
.right{
position: absolute;
min-height: 100%;
background-color: lightcyan;
top:0px;
right: 0px;
width: 200px;
}
.center{
margin: 0 200px;
background-color: lightseagreen;
min-height: 100%;
}
</style>
<body>
<!--DOM结构-->
<!--头部-->
<div class="header">
<div class="content">头部</div>
</div>
<!--//主体区块-->
<div class="main">
<div class="left">左</div>
<div class="center">中</div>
<div class="right">右</div>
</div>
<!--//尾部-->
<div class="footer">
<div class="content">底部</div>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
2，双飞翼布局(使用浮动float来实现布局,像国内的大型网站布局使用较多)
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>双飞翼布局</title>
</head>
<style>
.header ,.footer
{
width: 100%;
height: 60px;
background-color: lightgray;
margin-bottom: 0px;
}
.content
{
width: 1000px;
min-height: 100%;
background-color: gray;
margin: auto;
text-align: center;
line-height: 60px;
}
.container {
width: 1000px;
margin: auto;
background-color: yellow;
}
.wrap{
width: 100%;
background-color: lightcyan;
float: left;
}
.main{
min-height: 600px;
background-color: wheat;
margin-left: 260px;
margin-right: 250px;
}
/*使用伪类清除浮动造成的父容器塌陷*/
.container:after{
content: '';
display: block;
clear: both;
}
.left
{
width: 200px;
min-height: 600px;
background-color: lightblue;
float: left;
margin-left: -100%;
}
.right
{
width: 200px;
min-height: 600px;
background-color: red;
float: left;
margin-left: -200px;
}
</style>
<body>
<!--双飞翼DOM结构-->
<!--头部-->
<div class="header">
<div class="content">头部</div>
</div>
<!--//主体区块-->
<div class="container">
<div class="wrap">
<div class="main">主体内容</div>
</div>
<div class="left">左</div>
<div class="right">右</div>
</div>
<!--//尾部-->
<div class="footer">
<div class="content">底部</div>
</div>
</body>
</html>运行实例 »
点击 "运行实例" 按钮查看在线实例
3,使用圣杯布局（核心思想和双飞翼差不多,但是圣杯加入了绝对定位实现布局,并且其在外国大多数网站使用较多）
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>圣杯布局</title>
<style>
.header ,.footer
{
width: 100%;
height: 60px;
background-color: lightgray;
}
.content
{
width: 100%;
min-height: 100%;
background-color: gray;
margin: auto;
text-align: center;
line-height: 60px;
}
.container{
width: 1000px;
margin: auto;
background-color: lightpink;
}
.container .main{
width: 100%;
min-height: 650px;
background-color: wheat;
float: left;
}
.container .left{
width: 200px;
min-height: 650px;
background-color:lightblue ;
float: left;
margin-left: -100%;
position: relative;
left: -200px;
}
.container .right{
width: 200px;
min-height: 650px;
background-color: red;
float: left;
margin-left: -200px;
position: relative;
right: -200px;
}
.footer{clear: both}
</style>
</head>
<body>
<!--圣杯DOM结构-->
<!--头部-->
<div class="header">
<div class="content">头部</div>
</div>
<!--//主体区块-->
<div class="container">
<div class="main">主体内容</div>
<div class="left">左</div>
<div class="right">右</div>
</div>
<!--//尾部-->
<div class="footer">
<div class="content">底部</div>
</div>
</body>
</html>运行实例 »
点击 "运行实例" 按钮查看在线实例