1.通过float left 和相对width实现 <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>css三栏布局之float left与 相对width</title> <style> .block1,.block2,.block3{ float:left; width:32%; height:50px; border:1px dashed #F00; margin:2px; } .block1{background-color:red;} .block2{background-color:blue;} .block3{background-color:#ffe6b8;} </style> </head> <body> <div class="block1">block1</div> <div class="block2">block2</div> <div class="block3">block3</div> </body> </html>
2.绝对定位，通过absolute 定位使其脱离文档流，可以自适应定义三栏宽度
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>三栏布局css之绝对定位</title> <style> .left,.right{width: 200px;height: 200px; position: absolute;} .left{left:10px;background-color: red;} .right{right:10px;background-color: blue;} .center{margin:2px 210px ;background-color: yellow;height: 200px; } </style> </head> <body> <div class= "left">left</div> <div class = "right">right</div> <div class = "center">center</div> </body> </html>3.使用自身浮动，float left 和float right
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>三栏布局css之使用自身浮动</title> <style> .left,.right{width: 200px;height: 200px;} .left{float:left;background-color: red;} .right{float:right;background-color: blue;} .center{margin:2px 210px ;background-color: yellow;height: 200px; } </style> </head> <body> <div class= "left">left</div> <div class = "right">right</div> <div class = "center">center</div> </body> </html>