<!DOCTYPE html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.util.Date" %>
<%@ page import="java.text.SimpleDateFormat" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/
html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="css/page/index.css">
<title>window调用打印接口</title>
<style>
#pr{width:100px;height:40px;line-height:40px;text-align:center;background:#ccc;}
.box{width:600px;background:red;}
</style>
</head>
<body>
<div class="box">
<h1>要打印的内容</h1>
<p>测试内容</p>
</div>
<div id="pr">点击打印</div>
</body>
</html>
<script>
function $(selector){
return document.querySelector(selector);
}
//获取整个页面
$("#pr").onclick =function(){
window.print();
}
/* 实现打印全部页面（也可以打印局部页面 - 看需求） ----
我是只打印baby里边的内容
获取我们定义的id
*/
$("#pr").onclick =function(){
var oldHtml = $("body").innerHTML;
var printbox = $(".box").innerHTML;
$("body").innerHTML = printbox;
window.print();
$("body").innerHTML = oldHtml;
location.reload();//刷新当前页面，很重要
}
</script>
原文地址：https://blog.csdn.net/qq_36537546/article/details/8292736