js生成二维码

最新推荐文章于 2023-05-07 14:56:27 发布

原创最新推荐文章于 2023-05-07 14:56:27 发布 · 220 阅读

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代码如下：

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>jquery.qrcode生成二维码</title>
<link rel="stylesheet" type="text/css" href="../css/main.css" />
<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 = "http://www.helloweba.com";
	$('#code').qrcode(str);
	
	$("#sub_btn").click(function(){
		$("#code").empty();
		var str = toUtf8($("#mytxt").val());
		
		$("#code").qrcode({
			render: "table",
			width: 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>请输入内容然后提交生成二维码：</p>
        <p><input type="text" class="input" id="mytxt" value="明月几时有？把酒问青天。不知天上宫阙、今夕是何年？我欲乘风归去，惟恐琼楼玉宇，高处不胜寒．起舞弄清影，何似在人间？ 转朱阁，低绮户，照无眠。不应有恨、何事长向别时圆？人有悲欢离合，月有阴晴圆缺，此事古难全。但愿人长久，千里共蝉娟！"> <input type="button" id="sub_btn" value="提交"></p>
   		<div id="code"></div>
   </div>
</div>
<p>转自：http://www.helloweba.com</p>
</body>
</html>