jquery.qrcode生成二维码，支持中文

引入JS文件

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

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

创建显示二维码区域

<div id="qrcode"></div>

生成二维码代码

简单调用：

$('#qrcode').qrcode(toUtf8(str));

带参数调用：

$('#qrcode').qrcode({text:toUtf8(str), width:500, height:500, correctlevel:0});

支付中文函数

		function toUtf8(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;
		}