Two methods are provided, both of which are generated with the help of JQ plug-in.
Required files: https://download.csdn.net/download/qq_25285531/88204985 
https://download.csdn.net/download/qq_25285531/88204985
method one:
<script type="text/javascript" src="/static/index/js/jquery-1.11.3.min.js" ></script>
<script src="/static/index/js/qrcode.js"></script>
<style type='text/css'>
/*二维码大小*/
#qrcode img {
width:90px;
height:90px;
}
</style>
<body>
<div id="qrcode"></div>
</body>
<script type="text/javascript">
$(function(){
var qrcode = new QRCode("qrcode");
// 生成二维码的方法
function makeCode () {
// 二维码地址
var Url = 'www.baidu.com';
qrcode.makeCode(Url);
}
makeCode();
})
</script>Method two: relatively simple
<script src="/newadmin/js/jquery-1.12.3.min.js"></script>
<script src="/newadmin/js/jquery.qrcode.min.js"></script>
<body>
<div id="qrcode"></div>
</body>
<script type="text/javascript">
// 生成二维码
jQuery('#qrcode').qrcode({
render: "canvas", //也可以替换为table
width: 200,
height: 200,
text: "www.baidu.com"
});
</script>