有时候我们需要使用html+css实现打印A4纸张的功能页面，以下代码实现
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>A4打印页面</title>
<style>
/*横向*/
.a4-endwise{
margin: 0 auto;
width: 1070px;
height: 1550px;
border: 1px #ccc solid;
overflow: hidden;
padding: 0;
word-break:break-all;
}
/*纵向*/
.a4-broadwise{
margin: 0 auto;
width: 1569px;
height: 1073px;
border: 1px #000 solid;
overflow: hidden;
padding: 0;
word-break:break-all;
}
/*打印按钮*/
.print{
position: fixed;
top: 1%;
right: 10%;
}
</style>
</head>
<body>
<a class="print" href="javascript:;" onclick="preview();">打印</a>
<!--startprint-->
<div class="container a4-endwise" id="test">
打印内容-第一页
</div>
<div class="container a4-endwise" id="test2">
打印内容-第二页
</div>
<!--endprint-->
<script>
/**
* [打印]
* @return {[type]} [description]
*/
function preview(){
//获取当前页的html代码
bdhtml=window.document.body.innerHTML;
//设置打印开始区域
sprnstr="<!--startprint-->";
//设置打印结束区域
eprnstr="<!--endprint-->";
//从开始代码向后取html
prnhtml=bdhtml.substring(bdhtml.indexOf(sprnstr)+18);
//从结束代码向前取html
prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));
window.document.body.innerHTML=prnhtml;
window.print();
window.document.body.innerHTML=bdhtml;
}
</script>
</body>
</html>