<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="//cdn.bootcss.com/jquery/3.1.1/jquery.js"></script>
<script src="//cdn.bootcss.com/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
<script type="text/javascript">
$(function () {
var text ="${strrest}";
var qrcode= $('#divOne').qrcode(utf16to8(text)).hide();
console.info(qrcode);
var canvas=qrcode.find('canvas').get(0);
console.info(canvas);
$('#imgOne').attr('src',canvas.toDataURL('image/jpg'));
})
function utf16to8(str) { //转码
var out, i, len, c;
out = "";
len = str.length;
for (i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
}
</script>
</head>
<body>
<div id="divOne"></div>
<img id='imgOne' />
</body>
</html>
html生成二维码（识别长按）
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转载自blog.csdn.net/taowuhua0505/article/details/101055728
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