使用jquery生成随机二维码的方法
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在移动互联网的时代，做项目经常需要生成二维码，下面分享一些项目中使用到的生成随机二维码的方式。
1，使用到的js文件
qrcode.js --生成二维码引用的js
jquery.qrcode.js --生成二维码引用的js
jquery.1.8.3.min.js --使用jquery引入jquery文件
2，示例代码：
<!DOCTYPE title PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>使用jquery.qrcode.js生成随机二维码实战</title><script type="text/javascript" src="${ctx}/scripts/qrcode.js"></script><script type="text/javascript" src="${ctx}/scripts/jquery.qrcode.js"></script><script type="text/javascript" src="${ctx}/scripts/jquery.1.8.3.min.js"></script><script type="text/javascript" src="${ctx}/scripts/jquery.1.8.3.min.js"></script><script src="${ctx}/scripts/mclub/js/jifenleyuan.js"></script><script type="text/javascript" src="${ctx}/scripts/qrcode.js"></script><script type="text/javascript" src="${ctx}/scripts/jquery.qrcode.js"></script><script type="text/javascript">function displayqrcode(){//使用qrcode.js生成随机二维码，使用jquery生成随机二维码$('#order_code_div').qrcode({text:$('#order_code').val(), //根据 $('#order_code').val() 的值，生成随机二维码 render:"canvas", //设置渲染方式 width:180, //设置宽度，可以自己根据需要调整 height:180 //设置高度，可以自己根据需要调整 }); }</script></head><body> <div>如果需要提供帮助，请留言，博主看到会回复...</div><!-- 根据随机值，生成二维码 --> <div><input type="text" id="order_code"/></div> <div><input type="button" value="点击生成二维码" onclick="displayqrcode();"></div> <div> <div>下面显示生成的二维码：</div><div id="order_code_div"></div> </div></body>很简单的一段代码，就可以生成我们需要的二维码，下面附上引用的js文件的源代码，有兴趣的朋友可以研究一下，如果对生成的二维码的要求比较高的话，还是有必要研究一下源代码的。
效果图：
另外，在这里比较一下用jQuery取值的问题。我们如果需要获取input的标签的value值，可以直接使用$('#id').val();来获取；
如果我们想获取div标签中的内容，我们需要这样写：$('#id').text();
qrcode.js源代码：
//---------------------------------------------------------------------// 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////---------------------------------------------------------------------//---------------------------------------------------------------------// QR8bitByte//---------------------------------------------------------------------function QR8bitByte(data) {this.mode = QRMode.MODE_8BIT_BYTE;this.data = data;}QR8bitByte.prototype = {getLength : function(buffer) {return this.data.length;},write : function(buffer) {for (var i = 0; i < this.data.length; i++) {// not JIS ...buffer.put(this.data.charCodeAt(i), 8);}}};//---------------------------------------------------------------------// QRCode//---------------------------------------------------------------------function QRCode(typeNumber, errorCorrectLevel) {this.typeNumber = typeNumber;this.errorCorrectLevel = errorCorrectLevel;this.modules = null;this.moduleCount = 0;this.dataCache = null;this.dataList = new Array();}QRCode.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() {// Calculate automatically typeNumber if provided is < 1if (this.typeNumber < 1 ){var typeNumber = 1;for (typeNumber = 1; typeNumber < 40; typeNumber++) {var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);var buffer = new QRBitBuffer();var totalDataCount = 0;for (var i = 0; i < rsBlocks.length; i++) {totalDataCount += rsBlocks[i].dataCount;}for (var i = 0; i < this.dataList.length; i++) {var data = this.dataList[i];buffer.put(data.mode, 4);buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );data.write(buffer);}if (buffer.getLengthInBits() <= totalDataCount * 8)break;}this.typeNumber = typeNumber;}this.makeImpl(false, 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;//(col + row) % 3;}}this.setupPositionProbePattern(0, 0);this.setupPositionProbePattern(this.moduleCount - 7, 0);this.setupPositionProbePattern(0, this.moduleCount - 7);this.setupPositionAdjustPattern();this.setupTimingPattern();this.setupTypeInfo(test, maskPattern);if (this.typeNumber >= 7) {this.setupTypeNumber(test);}if (this.dataCache == null) {this.dataCache = QRCode.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;if ( (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] = true;} else {this.modules[row + r][col + c] = false;}}}},getBestMaskPattern : function() {var minLostPoint = 0;var pattern = 0;for (var i = 0; i < 8; i++) {this.makeImpl(true, i);var lostPoint = QRUtil.getLostPoint(this);if (i == 0 || minLostPoint > lostPoint) {minLostPoint = lostPoint;pattern = i;}}return pattern;},createMovieClip : function(target_mc, instance_name, depth) {var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);var cs = 1;this.make();for (var row = 0; row < this.modules.length; row++) {var y = row * cs;for (var col = 0; col < this.modules[row].length; col++) {var x = col * cs;var dark = this.modules[row][col];if (dark) {qr_mc.beginFill(0, 100);qr_mc.moveTo(x, y);qr_mc.lineTo(x + cs, y);qr_mc.lineTo(x + cs, y + cs);qr_mc.lineTo(x, y + cs);qr_mc.endFill();}}}return qr_mc;},setupTimingPattern : function() {for (var r = 8; r < this.moduleCount - 8; r++) {if (this.modules[r][6] != null) {continue;}this.modules[r][6] = (r % 2 == 0);}for (var c = 8; c < this.moduleCount - 8; c++) {if (this.modules[6][c] != null) {continue;}this.modules[6][c] = (c % 2 == 0);}},setupPositionAdjustPattern : function() {var pos = QRUtil.getPatternPosition(this.typeNumber);for (var i = 0; i < pos.length; i++) {for (var j = 0; j < pos.length; j++) {var row = pos[i];var col = pos[j];if (this.modules[row][col] != null) {continue;}for (var r = -2; r <= 2; r++) {for (var c = -2; c <= 2; c++) {if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0) ) {this.modules[row + r][col + c] = true;} else {this.modules[row + r][col + c] = false;}}}}}},setupTypeNumber : function(test) {var bits = QRUtil.getBCHTypeNumber(this.typeNumber);for (var i = 0; i < 18; i++) {var mod = (!test && ( (bits >> i) & 1) == 1);this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;}for (var i = 0; i < 18; i++) {var mod = (!test && ( (bits >> i) & 1) == 1);this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;}},setupTypeInfo : function(test, maskPattern) {var data = (this.errorCorrectLevel << 3) | maskPattern;var bits = QRUtil.getBCHTypeInfo(data);// verticalfor (var i = 0; i < 15; i++) {var mod = (!test && ( (bits >> i) & 1) == 1);if (i < 6) {this.modules[i][8] = mod;} else if (i < 8) {this.modules[i + 1][8] = mod;} else {this.modules[this.moduleCount - 15 + i][8] = mod;}}// horizontalfor (var i = 0; i < 15; i++) {var mod = (!test && ( (bits >> i) & 1) == 1);if (i < 8) {this.modules[8][this.moduleCount - i - 1] = mod;} else if (i < 9) {this.modules[8][15 - i - 1 + 1] = mod;} else {this.modules[8][15 - i - 1] = mod;}}// fixed modulethis.modules[this.moduleCount - 8][8] = (!test);},mapData : function(data, maskPattern) {var inc = -1;var row = this.moduleCount - 1;var bitIndex = 7;var byteIndex = 0;for (var col = this.moduleCount - 1; col > 0; col -= 2) {if (col == 6) col--;while (true) {for (var c = 0; c < 2; c++) {if (this.modules[row][col - c] == null) {var dark = false;if (byteIndex < data.length) {dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1);}var mask = QRUtil.getMask(maskPattern, row, col - c);if (mask) {dark = !dark;}this.modules[row][col - c] = dark;bitIndex--;if (bitIndex == -1) {byteIndex++;bitIndex = 7;}}}row += inc;if (row < 0 || this.moduleCount <= row) {row -= inc;inc = -inc;break;}}}}};QRCode.PAD0 = 0xEC;QRCode.PAD1 = 0x11;QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) {var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);var buffer = new QRBitBuffer();for (var i = 0; i < dataList.length; i++) {var data = dataList[i];buffer.put(data.mode, 4);buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) );data.write(buffer);}// calc num max data.var totalDataCount = 0;for (var i = 0; i < rsBlocks.length; i++) {totalDataCount += rsBlocks[i].dataCount;}if (buffer.getLengthInBits() > totalDataCount * 8) {throw new Error("code length overflow. ("+ buffer.getLengthInBits()+ ">"+ totalDataCount * 8+ ")");}// end codeif (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {buffer.put(0, 4);}// paddingwhile (buffer.getLengthInBits() % 8 != 0) {buffer.putBit(false);}// paddingwhile (true) {if (buffer.getLengthInBits() >= totalDataCount * 8) {break;}buffer.put(QRCode.PAD0, 8);if (buffer.getLengthInBits() >= totalDataCount * 8) {break;}buffer.put(QRCode.PAD1, 8);}return QRCode.createBytes(buffer, rsBlocks);}QRCode.createBytes = function(buffer, rsBlocks) {var offset = 0;var maxDcCount = 0;var maxEcCount = 0;var dcdata = new Array(rsBlocks.length);var ecdata = new Array(rsBlocks.length);for (var r = 0; r < rsBlocks.length; r++) {var dcCount = rsBlocks[r].dataCount;var ecCount = rsBlocks[r].totalCount - dcCount;maxDcCount = Math.max(maxDcCount, dcCount);maxEcCount = Math.max(maxEcCount, ecCount);dcdata[r] = new Array(dcCount);for (var i = 0; i < dcdata[r].length; i++) {dcdata[r][i] = 0xff & buffer.buffer[i + offset];}offset += dcCount;var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);var modPoly = rawPoly.mod(rsPoly);ecdata[r] = new Array(rsPoly.getLength() - 1);for (var i = 0; i < ecdata[r].length; i++) { var modIndex = i + modPoly.getLength() - ecdata[r].length;ecdata[r][i] = (modIndex >= 0)? modPoly.get(modIndex) : 0;}}var totalCodeCount = 0;for (var i = 0; i < rsBlocks.length; i++) {totalCodeCount += rsBlocks[i].totalCount;}var data = new Array(totalCodeCount);var index = 0;for (var i = 0; i < maxDcCount; i++) {for (var r = 0; r < rsBlocks.length; r++) {if (i < dcdata[r].length) {data[index++] = dcdata[r][i];}}}for (var i = 0; i < maxEcCount; i++) {for (var r = 0; r < rsBlocks.length; r++) {if (i < ecdata[r].length) {data[index++] = ecdata[r][i];}}}return data;}//---------------------------------------------------------------------// QRMode//---------------------------------------------------------------------var QRMode = {MODE_NUMBER :1 << 0,MODE_ALPHA_NUM : 1 << 1,MODE_8BIT_BYTE : 1 << 2,MODE_KANJI :1 << 3};//---------------------------------------------------------------------// QRErrorCorrectLevel//--------------------------------------------------------------------- var QRErrorCorrectLevel = {L : 1,M : 0,Q : 3,H : 2};//---------------------------------------------------------------------// QRMaskPattern//---------------------------------------------------------------------var QRMaskPattern = {PATTERN000 : 0,PATTERN001 : 1,PATTERN010 : 2,PATTERN011 : 3,PATTERN100 : 4,PATTERN101 : 5,PATTERN110 : 6,PATTERN111 : 7};//---------------------------------------------------------------------// QRUtil//--------------------------------------------------------------------- var QRUtil = { PATTERN_POSITION_TABLE : [ [], [6, 18], [6, 22], [6, 26], [6, 30], [6, 34], [6, 22, 38], [6, 24, 42], [6, 26, 46], [6, 28, 50], [6, 30, 54], [6, 32, 58], [6, 34, 62], [6, 26, 46, 66], [6, 26, 48, 70], [6, 26, 50, 74], [6, 30, 54, 78], [6, 30, 56, 82], [6, 30, 58, 86], [6, 34, 62, 90], [6, 28, 50, 72, 94], [6, 26, 50, 74, 98], [6, 30, 54, 78, 102], [6, 28, 54, 80, 106], [6, 32, 58, 84, 110], [6, 30, 58, 86, 114], [6, 34, 62, 90, 118], [6, 26, 50, 74, 98, 122], [6, 30, 54, 78, 102, 126], [6, 26, 52, 78, 104, 130], [6, 30, 56, 82, 108, 134], [6, 34, 60, 86, 112, 138], [6, 30, 58, 86, 114, 142], [6, 34, 62, 90, 118, 146], [6, 30, 54, 78, 102, 126, 150], [6, 24, 50, 76, 102, 128, 154], [6, 28, 54, 80, 106, 132, 158], [6, 32, 58, 84, 110, 136, 162], [6, 26, 54, 82, 110, 138, 166], [6, 30, 58, 86, 114, 142, 170] ], G15 : (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0), G18 : (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0), G15_MASK : (1 << 14) | (1 << 12) | (1 << 10)| (1 << 4) | (1 << 1), getBCHTypeInfo : function(data) { var d = data << 10; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) { d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) ) ); } return ( (data << 10) | d) ^ QRUtil.G15_MASK; }, getBCHTypeNumber : function(data) { var d = data << 12; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) { d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) ) ); } return (data << 12) | d; }, getBCHDigit : function(data) { var digit = 0; while (data != 0) { digit++; data >>>= 1; } return digit; }, getPatternPosition : function(typeNumber) { return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; }, getMask : function(maskPattern, i, j) { switch (maskPattern) { case QRMaskPattern.PATTERN000 : return (i + j) % 2 == 0; case QRMaskPattern.PATTERN001 : return i % 2 == 0; case QRMaskPattern.PATTERN010 : return j % 3 == 0; case QRMaskPattern.PATTERN011 : return (i + j) % 3 == 0; case QRMaskPattern.PATTERN100 : return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0; case QRMaskPattern.PATTERN101 : return (i * j) % 2 + (i * j) % 3 == 0; case QRMaskPattern.PATTERN110 : return ( (i * j) % 2 + (i * j) % 3) % 2 == 0; case QRMaskPattern.PATTERN111 : return ( (i * j) % 3 + (i + j) % 2) % 2 == 0; default : throw new Error("bad maskPattern:" + maskPattern); } }, getErrorCorrectPolynomial : function(errorCorrectLength) { var a = new QRPolynomial([1], 0); for (var i = 0; i < errorCorrectLength; i++) { a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0) ); } return a; }, getLengthInBits : function(mode, type) { if (1 <= type && type < 10) { // 1 - 9 switch(mode) { case QRMode.MODE_NUMBER : return 10; case QRMode.MODE_ALPHA_NUM : return 9; case QRMode.MODE_8BIT_BYTE: return 8; case QRMode.MODE_KANJI : return 8; default : throw new Error("mode:" + mode); } } else if (type < 27) { // 10 - 26 switch(mode) { case QRMode.MODE_NUMBER : return 12; case QRMode.MODE_ALPHA_NUM : return 11; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI : return 10; default : throw new Error("mode:" + mode); } } else if (type < 41) { // 27 - 40 switch(mode) { case QRMode.MODE_NUMBER : return 14; case QRMode.MODE_ALPHA_NUM: return 13; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI : return 12; default : throw new Error("mode:" + mode); } } else { throw new Error("type:" + type); } }, getLostPoint : function(qrCode) { var moduleCount = qrCode.getModuleCount(); var lostPoint = 0; // LEVEL1 for (var row = 0; row < moduleCount; row++) { for (var col = 0; col < moduleCount; col++) { var sameCount = 0; var dark = qrCode.isDark(row, col);for (var r = -1; r <= 1; r++) { if (row + r < 0 || moduleCount <= row + r) { continue; } for (var c = -1; c <= 1; c++) { if (col + c < 0 || moduleCount <= col + c) { continue; } if (r == 0 && c == 0) { continue; } if (dark == qrCode.isDark(row + r, col + c) ) { sameCount++; } } } if (sameCount > 5) { lostPoint += (3 + sameCount - 5); } } } // LEVEL2 for (var row = 0; row < moduleCount - 1; row++) { for (var col = 0; col < moduleCount - 1; col++) { var count = 0; if (qrCode.isDark(row, col ) ) count++; if (qrCode.isDark(row + 1, col ) ) count++; if (qrCode.isDark(row, col + 1) ) count++; if (qrCode.isDark(row + 1, col + 1) ) count++; if (count == 0 || count == 4) { lostPoint += 3; } } } // LEVEL3 for (var row = 0; row < moduleCount; row++) { for (var col = 0; col < moduleCount - 6; col++) { if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6) ) { lostPoint += 40; } } } for (var col = 0; col < moduleCount; col++) { for (var row = 0; row < moduleCount - 6; row++) { if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col) ) { lostPoint += 40; } } } // LEVEL4 var darkCount = 0; for (var col = 0; col < moduleCount; col++) { for (var row = 0; row < moduleCount; row++) { if (qrCode.isDark(row, col) ) { darkCount++; } } } var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; lostPoint += ratio * 10; return lostPoint; }};//---------------------------------------------------------------------// QRMath//---------------------------------------------------------------------var QRMath = {glog : function(n) {if (n < 1) {throw new Error("glog(" + n + ")");}return QRMath.LOG_TABLE[n];},gexp : function(n) {while (n < 0) {n += 255;}while (n >= 256) {n -= 255;}return QRMath.EXP_TABLE[n];},EXP_TABLE : new Array(256),LOG_TABLE : new Array(256)};for (var i = 0; i < 8; i++) {QRMath.EXP_TABLE[i] = 1 << i;}for (var i = 8; i < 256; i++) {QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4]^ QRMath.EXP_TABLE[i - 5]^ QRMath.EXP_TABLE[i - 6]^ QRMath.EXP_TABLE[i - 8];}for (var i = 0; i < 255; i++) {QRMath.LOG_TABLE[QRMath.EXP_TABLE[i] ] = i;}//---------------------------------------------------------------------// QRPolynomial//---------------------------------------------------------------------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];}}QRPolynomial.prototype = {get : function(index) {return this.num[index];},getLength : function() {return this.num.length;},multiply : function(e) {var num = new Array(this.getLength() + e.getLength() - 1);for (var i = 0; i < this.getLength(); i++) {for (var j = 0; j < e.getLength(); j++) {num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i) ) + QRMath.glog(e.get(j) ) );}}return new QRPolynomial(num, 0);},mod : function(e) {if (this.getLength() - e.getLength() < 0) {return this;}var ratio = QRMath.glog(this.get(0) ) - QRMath.glog(e.get(0) );var num = new Array(this.getLength() );for (var i = 0; i < this.getLength(); i++) {num[i] = this.get(i);}for (var i = 0; i < e.getLength(); i++) {num[i] ^= QRMath.gexp(QRMath.glog(e.get(i) ) + ratio);}// recursive callreturn new QRPolynomial(num, 0).mod(e);}};//---------------------------------------------------------------------// QRRSBlock//---------------------------------------------------------------------function QRRSBlock(totalCount, dataCount) {this.totalCount = totalCount;this.dataCount = dataCount;}QRRSBlock.RS_BLOCK_TABLE = [// L// M// Q// H// 1[1, 26, 19],[1, 26, 16],[1, 26, 13],[1, 26, 9],// 2[1, 44, 34],[1, 44, 28],[1, 44, 22],[1, 44, 16],// 3[1, 70, 55],[1, 70, 44],[2, 35, 17],[2, 35, 13],// 4[1, 100, 80],[2, 50, 32],[2, 50, 24],[4, 25, 9],// 5[1, 134, 108],[2, 67, 43],[2, 33, 15, 2, 34, 16],[2, 33, 11, 2, 34, 12],// 6[2, 86, 68],[4, 43, 27],[4, 43, 19],[4, 43, 15],// 7[2, 98, 78],[4, 49, 31],[2, 32, 14, 4, 33, 15],[4, 39, 13, 1, 40, 14],// 8[2, 121, 97],[2, 60, 38, 2, 61, 39],[4, 40, 18, 2, 41, 19],[4, 40, 14, 2, 41, 15],// 9[2, 146, 116],[3, 58, 36, 2, 59, 37],[4, 36, 16, 4, 37, 17],[4, 36, 12, 4, 37, 13],// 10[2, 86, 68, 2, 87, 69],[4, 69, 43, 1, 70, 44],[6, 43, 19, 2, 44, 20],[6, 43, 15, 2, 44, 16],// 11[4, 101, 81],[1, 80, 50, 4, 81, 51],[4, 50, 22, 4, 51, 23],[3, 36, 12, 8, 37, 13],// 12[2, 116, 92, 2, 117, 93],[6, 58, 36, 2, 59, 37],[4, 46, 20, 6, 47, 21],[7, 42, 14, 4, 43, 15],// 13[4, 133, 107],[8, 59, 37, 1, 60, 38],[8, 44, 20, 4, 45, 21],[12, 33, 11, 4, 34, 12],// 14[3, 145, 115, 1, 146, 116],[4, 64, 40, 5, 65, 41],[11, 36, 16, 5, 37, 17],[11, 36, 12, 5, 37, 13],// 15[5, 109, 87, 1, 110, 88],[5, 65, 41, 5, 66, 42],[5, 54, 24, 7, 55, 25],[11, 36, 12],// 16[5, 122, 98, 1, 123, 99],[7, 73, 45, 3, 74, 46],[15, 43, 19, 2, 44, 20],[3, 45, 15, 13, 46, 16],// 17[1, 135, 107, 5, 136, 108],[10, 74, 46, 1, 75, 47],[1, 50, 22, 15, 51, 23],[2, 42, 14, 17, 43, 15],// 18[5, 150, 120, 1, 151, 121],[9, 69, 43, 4, 70, 44],[17, 50, 22, 1, 51, 23],[2, 42, 14, 19, 43, 15],// 19[3, 141, 113, 4, 142, 114],[3, 70, 44, 11, 71, 45],[17, 47, 21, 4, 48, 22],[9, 39, 13, 16, 40, 14],// 20[3, 135, 107, 5, 136, 108],[3, 67, 41, 13, 68, 42],[15, 54, 24, 5, 55, 25],[15, 43, 15, 10, 44, 16],// 21[4, 144, 116, 4, 145, 117],[17, 68, 42],[17, 50, 22, 6, 51, 23],[19, 46, 16, 6, 47, 17],// 22[2, 139, 111, 7, 140, 112],[17, 74, 46],[7, 54, 24, 16, 55, 25],[34, 37, 13],// 23[4, 151, 121, 5, 152, 122],[4, 75, 47, 14, 76, 48],[11, 54, 24, 14, 55, 25],[16, 45, 15, 14, 46, 16],// 24[6, 147, 117, 4, 148, 118],[6, 73, 45, 14, 74, 46],[11, 54, 24, 16, 55, 25],[30, 46, 16, 2, 47, 17],// 25[8, 132, 106, 4, 133, 107],[8, 75, 47, 13, 76, 48],[7, 54, 24, 22, 55, 25],[22, 45, 15, 13, 46, 16],// 26[10, 142, 114, 2, 143, 115],[19, 74, 46, 4, 75, 47],[28, 50, 22, 6, 51, 23],[33, 46, 16, 4, 47, 17],// 27[8, 152, 122, 4, 153, 123],[22, 73, 45, 3, 74, 46],[8, 53, 23, 26, 54, 24],[12, 45, 15, 28, 46, 16],// 28[3, 147, 117, 10, 148, 118],[3, 73, 45, 23, 74, 46],[4, 54, 24, 31, 55, 25],[11, 45, 15, 31, 46, 16],// 29[7, 146, 116, 7, 147, 117],[21, 73, 45, 7, 74, 46],[1, 53, 23, 37, 54, 24],[19, 45, 15, 26, 46, 16],// 30[5, 145, 115, 10, 146, 116],[19, 75, 47, 10, 76, 48],[15, 54, 24, 25, 55, 25],[23, 45, 15, 25, 46, 16],// 31[13, 145, 115, 3, 146, 116],[2, 74, 46, 29, 75, 47],[42, 54, 24, 1, 55, 25],[23, 45, 15, 28, 46, 16],// 32[17, 145, 115],[10, 74, 46, 23, 75, 47],[10, 54, 24, 35, 55, 25],[19, 45, 15, 35, 46, 16],// 33[17, 145, 115, 1, 146, 116],[14, 74, 46, 21, 75, 47],[29, 54, 24, 19, 55, 25],[11, 45, 15, 46, 46, 16],// 34[13, 145, 115, 6, 146, 116],[14, 74, 46, 23, 75, 47],[44, 54, 24, 7, 55, 25],[59, 46, 16, 1, 47, 17],// 35[12, 151, 121, 7, 152, 122],[12, 75, 47, 26, 76, 48],[39, 54, 24, 14, 55, 25],[22, 45, 15, 41, 46, 16],// 36[6, 151, 121, 14, 152, 122],[6, 75, 47, 34, 76, 48],[46, 54, 24, 10, 55, 25],[2, 45, 15, 64, 46, 16],// 37[17, 152, 122, 4, 153, 123],[29, 74, 46, 14, 75, 47],[49, 54, 24, 10, 55, 25],[24, 45, 15, 46, 46, 16],// 38[4, 152, 122, 18, 153, 123],[13, 74, 46, 32, 75, 47],[48, 54, 24, 14, 55, 25],[42, 45, 15, 32, 46, 16],// 39[20, 147, 117, 4, 148, 118],[40, 75, 47, 7, 76, 48],[43, 54, 24, 22, 55, 25],[10, 45, 15, 67, 46, 16],// 40[19, 148, 118, 6, 149, 119],[18, 75, 47, 31, 76, 48],[34, 54, 24, 34, 55, 25],[20, 45, 15, 61, 46, 16]];QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);if (rsBlock == undefined) {throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);}var length = rsBlock.length / 3;var list = new Array();for (var i = 0; i < length; i++) {var count = rsBlock[i * 3 + 0];var totalCount = rsBlock[i * 3 + 1];var dataCount = rsBlock[i * 3 + 2];for (var j = 0; j < count; j++) {list.push(new QRRSBlock(totalCount, dataCount) );}}return list;}QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {switch(errorCorrectLevel) {case QRErrorCorrectLevel.L :return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];case QRErrorCorrectLevel.M :return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];case QRErrorCorrectLevel.Q :return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];case QRErrorCorrectLevel.H :return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];default :return undefined;}}//---------------------------------------------------------------------// QRBitBuffer//---------------------------------------------------------------------function QRBitBuffer() {this.buffer = new Array();this.length = 0;}QRBitBuffer.prototype = {get : function(index) {var bufIndex = Math.floor(index / 8);return ( (this.buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1;},put : function(num, length) {for (var i = 0; i < length; i++) {this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1);}},getLengthInBits : function() {return this.length;},putBit : function(bit) {var bufIndex = Math.floor(this.length / 8);if (this.buffer.length <= bufIndex) {this.buffer.push(0);}if (bit) {this.buffer[bufIndex] |= (0x80 >>> (this.length % 8) );}this.length++;}};jquery.qrcode.js源代码：
(function( $ ){$.fn.qrcode = function(options) {// if options is string, if( typeof options === 'string' ){options= { text: options };}// set default values// typeNumber < 1 for automatic calculationoptions= $.extend( {}, {render: "canvas",width: 256,height: 256,typeNumber: -1,correctLevel: QRErrorCorrectLevel.H, background : "#ffffff", foreground : "#000000"}, options);var createCanvas= function(){// create the qrcode itselfvar qrcode= new QRCode(options.typeNumber, options.correctLevel);qrcode.addData(options.text);qrcode.make();// create canvas elementvar canvas= document.createElement('canvas');canvas.width= options.width;canvas.height= options.height;var ctx= canvas.getContext('2d');// compute tileW/tileH based on options.width/options.heightvar tileW= options.width / qrcode.getModuleCount();var tileH= options.height / qrcode.getModuleCount();// draw in the canvasfor( var row = 0; row < qrcode.getModuleCount(); row++ ){for( var col = 0; col < qrcode.getModuleCount(); col++ ){ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h); }}// return just built canvasreturn canvas;}// from Jon-Carlos Rivera (https://github.com/imbcmdth)var createTable= function(){// create the qrcode itselfvar qrcode= new QRCode(options.typeNumber, options.correctLevel);qrcode.addData(options.text);qrcode.make();// create table elementvar $table= $('<table></table>').css("width", options.width+"px").css("height", options.height+"px").css("border", "0px").css("border-collapse", "collapse").css('background-color', options.background); // compute tileS percentagevar tileW= options.width / qrcode.getModuleCount();var tileH= options.height / qrcode.getModuleCount();// draw in the tablefor(var row = 0; row < qrcode.getModuleCount(); row++ ){var $row = $('<tr></tr>').css('height', tileH+"px").appendTo($table);for(var col = 0; col < qrcode.getModuleCount(); col++ ){$('<td></td>').css('width', tileW+"px").css('background-color', qrcode.isDark(row, col) ? options.foreground : options.background).appendTo($row);}}// return just built canvasreturn $table;} return this.each(function(){var element= options.render == "canvas" ? createCanvas() : createTable();$(element).appendTo(this);});};})( jQuery ); 0 0
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