<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>演示：使用jquery.qrcode生成二维码</title> <style type="text/css"> .demo{width:400px; margin:40px auto 0 auto; min-height:250px;} .demo p{line-height:30px} #code{margin-top:10px} </style> <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"> $(function(){ var str = "我是用jquery.qrcode.min.js生成的二维码"; $('#code').qrcode(toUtf8(str)); $("#sub_btn").click(function(){ $("#code").empty(); var str = toUtf8($("#mytxt").val()); $("#code").qrcode({ render: "table", 200, height:200, text: str }); }); }) 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; } </script> </head> <body> <div id="main"> <div class="demo"> <p>使用jquery.qrcode生成二维码 请输入内容然后提交生成二维码：</p> <p><input type="text" class="input" id="mytxt" value=""> <input type="button" id="sub_btn" value="提交"></p> <div id="code"></div> </div> </div> </body> </html>