Jquery插件-jquery-qrcode生成二维码

现在jquery.min.js和jquery.qrcode.min.js文件

先将js文件引入

<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.qrcode.min.js"></script>

将要显示二维码的地方添加一下代码：
<div id="qrcode"></div>在文档尾引入设置代码：
<script type="text/javascript">
jQuery('#qrcode').qrcode({
width: 100,
height: 100,
render: "canvas", //设置渲染方式 table canvas
text: utf16to8("javascript生成二维码"),
background: "#ffffff", //背景颜色
foreground: "red" //前景颜色 F
});

//转码
function utf16to8(str) {
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>