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將一個字串（可以是中文，在產生二維碼圖片之前將中文轉碼）產生二維碼圖片，如果想要帶log的二維碼，可以在產生後的二維碼中間部位自己添加一個小log，log圖片不要太大，不然就掃描不出內容了。
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <script src="js/jquery-1.8.3.js" type="text/javascript"></script> <script src="js/qrcode.js" type="text/javascript"></script> <script src="js/jquery.qrcode.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $("#bt").bind("click", function () { text = $("#text").val(); $("#div_div").qrcode(utf16to8(text)); }) }) function utf16to8(str) { //轉碼 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> <input type="text" id="text" /> <input type="button" value="shengc" id="bt" /> <div id="div_div" style="width:400px;height:400px;border:1px solid #000;"></div> </body> </html>
這裡引用了三個js包，其中一個是jquery包，這個隨便版本，另外兩個就是畫二維碼用的js包了。
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