標籤：jquery 二維碼
直接進入正題：
引入jquery js 和jquery-qrcode.js ，稍後本人會將代碼demo上傳至資產庫。代碼很簡單：
如果是非中文的字元產生二維碼，那麼就比較簡單了。
<!DOCTYPE html><html><head><meta charset="utf-8" /><title></title><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/jquery.qrcode.min.js"></script><script>$(function() {$("#qrcode").qrcode("welcome to China");});</script><body><div id="qrcode"></div></body></html>如果是中文字元或者含有中文字元，那麼就需要做一些編碼轉換，將UTF-16轉換為UTF-8
<!DOCTYPE html><html><head><meta charset="utf-8" /><title></title><script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src="js/jquery.qrcode.min.js"></script><script type="text/javascript" src="js/convertCN.js"></script><script>$(function() {$("#qrcode").qrcode(utf16to8("黃斌"));});</script><body><div id="qrcode"></div></body></html>
convertCN.js的內容如下：
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;}
其中第三個js的引入是自訂的，用來解決中文無法識別的問題。jquery相對於Java servlet 產生二維碼來說，更加快捷，方便，依賴更少的外掛程式。
jquery產生二維碼
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