其中已经包括了qrcode.js，style.css,index.html共三个文件
index.html :
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>qrcode.js插件将你的内容转换成二维码格式</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="lanren">
<h1>请在下面输入框中输入内容</h1>
<input type="text" placeholder="请在这里输入内容" id="demo">
<button id="send">点击生成二维码</button>
<div id="qrcode"></div>
</div>
<script src="js/qrcode.js"></script>
<script>
window.onload = function() {
var content = document.getElementById("qrcode");//放二维码的容器
var qrcode = new QRCode(content, {
width: 200,
height: 200
});
document.getElementById("send").onclick = function() {
var value = document.getElementById("demo").value;//文字内容信息
qrcode.makeCode(value);//将文字内容信息生成二维码
content.style.display = "block";//显示二维码
}
}
</script>
</body>
</html>
style.css :
.lanren {
width: 500px;
height: auto;
margin: 0 auto;
overflow: hidden;
text-align: center;
}
.lanren #qrcode {
width: 200px;
height: 200px;
position: relative;
margin: 10px auto;
display: none;
}
.lanren input {
width: 200px;
height: 20px;
line-height: 20px;
padding: 4px;
outline: 0;
}
.lanren button {
display: block;
width: 120px;
height: 45px;
background: #0cc;
text-align: center;
line-height: 45px;
border-radius: 45px;
margin: 5px auto;
border: none;
cursor: pointer;
color: #fff;
outline: 0;
}
qrcode.js :
/*from tccdn minify at 2014-6-4 14:59:43,file：/cn/c/c/qrcode.js*/
/**
* @fileoverview
* - Using the 'QRCode for Javascript library'
* - Fixed dataset of 'QRCode for Javascript library' for support full-spec.
* - this library has no dependencies.
*
* @author davidshimjs
* @see <a href="http://www.d-project.com/" target="_blank">http://www.d-project.com/</a>
* @see <a href="http://jeromeetienne.github.com/jquery-qrcode/" target="_blank">http://jeromeetienne.github.com/jquery-qrcode/</a>
*/
var QRCode;
(function () {
//---------------------------------------------------------------------
// QRCode for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: http://www.d-project.com/
//
// Licensed under the MIT license:
// http://www.opensource.org/licenses/mit-license.php
//
// The word "QR Code" is registered trademark of
// DENSO WAVE INCORPORATED
// http://www.denso-wave.com/qrcode/faqpatent-e.html
//
//---------------------------------------------------------------------
function QR8bitByte(data) {
this.mode = QRMode.MODE_8BIT_BYTE;
this.data = data;
this.parsedData = [];
// Added to support UTF-8 Characters
for (var i = 0, l = this.data.length; i < l; i++) {
var byteArray = [];
var code = this.data.charCodeAt(i);
if (code > 0x10000) {
byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
byteArray[3] = 0x80 | (code & 0x3F);
} else if (code > 0x800) {
byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
byteArray[2] = 0x80 | (code & 0x3F);
} else if (code > 0x80) {
byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
byteArray[1] = 0x80 | (code & 0x3F);
} else {
byteArray[0] = code;
}
this.parsedData.push(byteArray);
}
this.parsedData = Array.prototype.concat.apply([], this.parsedData);
if (this.parsedData.length != this.data.length) {
this.parsedData.unshift(191);
this.parsedData.unshift(187);
this.parsedData.unshift(239);
}
}
QR8bitByte.prototype = {
getLength: function (buffer) {
return this.parsedData.length;
},
write: function (buffer) {
for (var i = 0, l = this.parsedData.length; i < l; i++) {
buffer.put(this.parsedData[i], 8);
}
}
};
function QRCodeModel(typeNumber, errorCorrectLevel) {
this.typeNumber = typeNumber;
this.errorCorrectLevel = errorCorrectLevel;
this.modules = null;
this.moduleCount = 0;
this.dataCache = null;
this.dataList = [];
}
function QRPolynomial(num, shift) {
if (num.length == undefined) throw new Error(num.length + "/" + shift);
var offset = 0;
while (offset < num.length && num[offset] == 0) offset++;
this.num = new Array(num.length - offset + shift);
for (var i = 0; i < num.length - offset; i++) this.num[i] = num[i + offset];
}
function QRRSBlock(totalCount, dataCount) {
this.totalCount = totalCount, this.dataCount = dataCount;
}
function QRBitBuffer() {
this.buffer = [], this.length = 0;
}
QRCodeModel.prototype = {
"addData": function(data) {
var newData = new QR8bitByte(data);
this.dataList.push(newData), this.dataCache = null;
},
"isDark": function(row, col) {
if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) throw new Error(row + "," + col);
return this.modules[row][col];
},
"getModuleCount": function() {
return this.moduleCount;
},
"make": function() {
this.makeImpl(!1, this.getBestMaskPattern());
},
"makeImpl": function(test, maskPattern) {
this.moduleCount = this.typeNumber * 4 + 17, this.modules = new Array(this.moduleCount);
for (var row = 0; row < this.moduleCount; row++) {
this.modules[row] = new Array(this.moduleCount);
for (var col = 0; col < this.moduleCount; col++) this.modules[row][col] = null;
}
this.setupPositionProbePattern(0, 0),
this.setupPositionProbePattern(this.moduleCount - 7, 0),
this.setupPositionProbePattern(0, this.moduleCount - 7),
this.setupPositionAdjustPattern(), this.setupTimingPattern(),
this.setupTypeInfo(test, maskPattern),
this.typeNumber >= 7 && this.setupTypeNumber(test),
this.dataCache == null && (this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList)), this.mapData(this.dataCache, maskPattern);
},
"setupPositionProbePattern": function(row, col) {
for (var r = -1; r <= 7; r++) {
if (row + r <= -1 || this.moduleCount <= row + r) continue;
for (var c = -1; c <= 7; c++) {
if (col + c <= -1 || this.moduleCount <= col + c) continue;
0<= r && r <= 6 && (c == 0 || c == 6) || 0 <= c && c <= 6 && (r == 0 || r == 6) || 2 <= r && r <= 4 && 2 <= c && c <= 4 ? this.modules[row + r][col + c] = !0 : this.modules[row + r][col + c] = !1;
}
}
},
"getBestMaskPattern": function