在开发中，有时候，我们需要根据不同的内容来动态生成二维码，则可以使用qrcode.js这个小插件来实现。
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1.qrcode.js文件内容：
（1）未压缩（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() { var minLostPoint = 0, pattern = 0; for (var i = 0; i < 8; i++) { this.makeImpl(!0, 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), 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, dark = this.modules[row][col]; 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], col = pos[j]; if (this.modules[row][col] != null) continue; for (var r = -2; r <= 2; r++) for (var c = -2; c <= 2; c++) r == -2 || r == 2 || c == -2 || c == 2 || r == 0 && c == 0 ? this.modules[row + r][col + c] = !0 : this.modules[row + r][col + c] = !1; } }, "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, bits = QRUtil.getBCHTypeInfo(data); for (var i = 0; i < 15; i++) { var mod = !test && (bits >> i & 1) == 1; i < 6 ? this.modules[i][8] = mod : i < 8 ? this.modules[i + 1][8] = mod : this.modules[this.moduleCount - 15 + i][8] = mod; } for (var i = 0; i < 15; i++) { var mod = !test && (bits >> i & 1) == 1; i < 8 ? this.modules[8][this.moduleCount - i - 1] = mod : i < 9 ? this.modules[8][15 - i - 1 + 1] = mod : this.modules[8][15 - i - 1] = mod; } this.modules[this.moduleCount - 8][8] = !test; }, "mapData": function(data, maskPattern) { var inc = -1, row = this.moduleCount - 1, bitIndex = 7, byteIndex = 0; for (var col = this.moduleCount - 1; col > 0; col -= 2) { col == 6 && col--; for (;;) { for (var c = 0; c < 2; c++) if (this.modules[row][col - c] == null) { var dark = !1; byteIndex < data.length && (dark = (data[byteIndex] >>> bitIndex & 1) == 1); var mask = QRUtil.getMask(maskPattern, row, col - c); mask && (dark = !dark), this.modules[row][col - c] = dark, bitIndex--, bitIndex == -1 && (byteIndex++, bitIndex = 7); } row += inc; if (row < 0 || this.moduleCount <= row) { row -= inc, inc = -inc; break; } } } } }, QRCodeModel.PAD0 = 236, QRCodeModel.PAD1 = 17, QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) { var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel), 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); } 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 + ")"); buffer.getLengthInBits() + 4 <= totalDataCount * 8 && buffer.put(0, 4); while (buffer.getLengthInBits() % 8 != 0) buffer.putBit(!1); for (;;) { if (buffer.getLengthInBits() >= totalDataCount * 8) break; buffer.put(QRCodeModel.PAD0, 8); if (buffer.getLengthInBits() >= totalDataCount * 8) break; buffer.put(QRCodeModel.PAD1, 8); } return QRCodeModel.createBytes(buffer, rsBlocks); }, QRCodeModel.createBytes = function(buffer, rsBlocks) { var offset = 0, maxDcCount = 0, maxEcCount = 0, dcdata = new Array(rsBlocks.length), ecdata = new Array(rsBlocks.length); for (var r = 0; r < rsBlocks.length; r++) { var dcCount = rsBlocks[r].dataCount, 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] = 255 & buffer.buffer[i + offset]; offset += dcCount; var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount), rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1), 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), index = 0; for (var i = 0; i < maxDcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < dcdata[r].length && (data[index++] = dcdata[r][i]); for (var i = 0; i < maxEcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < ecdata[r].length && (data[index++] = ecdata[r][i]); return data; }; var QRMode = { "MODE_NUMBER": 1, "MODE_ALPHA_NUM": 2, "MODE_8BIT_BYTE": 4, "MODE_KANJI": 8 }, QRErrorCorrectLevel = { "L": 1, "M": 0, "Q": 3, "H": 2 }, QRMaskPattern = { "PATTERN000": 0, "PATTERN001": 1, "PATTERN010": 2, "PATTERN011": 3, "PATTERN100": 4, "PATTERN101": 5, "PATTERN110": 6, "PATTERN111": 7 }, 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": 1335, "G18": 7973, "G15_MASK": 21522, "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) 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) 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)) throw new Error("type:" + type); 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); } } }, "getLostPoint": function(qrCode) { var moduleCount = qrCode.getModuleCount(), lostPoint = 0; for (var row = 0; row < moduleCount; row++) for (var col = 0; col < moduleCount; col++) { var sameCount = 0, 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; dark == qrCode.isDark(row + r, col + c) && sameCount++; } } sameCount > 5 && (lostPoint += 3 + sameCount - 5); } for (var row = 0; row < moduleCount - 1; row++) for (var col = 0; col < moduleCount - 1; col++) { var count = 0; qrCode.isDark(row, col) && count++, qrCode.isDark(row + 1, col) && count++, qrCode.isDark(row, col + 1) && count++, qrCode.isDark(row + 1, col + 1) && count++; if (count == 0 || count == 4) lostPoint += 3; } for (var row = 0; row < moduleCount; row++) for (var col = 0; col < moduleCount - 6; col++) 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++) 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); var darkCount = 0; for (var col = 0; col < moduleCount; col++) for (var row = 0; row < moduleCount; row++) qrCode.isDark(row, col) && darkCount++; var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; return lostPoint += ratio * 10, lostPoint; } }, 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.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)), 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); return (new QRPolynomial(num, 0)).mod(e); } }, QRRSBlock.RS_BLOCK_TABLE = [ [ 1, 26, 19 ], [ 1, 26, 16 ], [ 1, 26, 13 ], [ 1, 26, 9 ], [ 1, 44, 34 ], [ 1, 44, 28 ], [ 1, 44, 22 ], [ 1, 44, 16 ], [ 1, 70, 55 ], [ 1, 70, 44 ], [ 2, 35, 17 ], [ 2, 35, 13 ], [ 1, 100, 80 ], [ 2, 50, 32 ], [ 2, 50, 24 ], [ 4, 25, 9 ], [ 1, 134, 108 ], [ 2, 67, 43 ], [ 2, 33, 15, 2, 34, 16 ], [ 2, 33, 11, 2, 34, 12 ], [ 2, 86, 68 ], [ 4, 43, 27 ], [ 4, 43, 19 ], [ 4, 43, 15 ], [ 2, 98, 78 ], [ 4, 49, 31 ], [ 2, 32, 14, 4, 33, 15 ], [ 4, 39, 13, 1, 40, 14 ], [ 2, 121, 97 ], [ 2, 60, 38, 2, 61, 39 ], [ 4, 40, 18, 2, 41, 19 ], [ 4, 40, 14, 2, 41, 15 ], [ 2, 146, 116 ], [ 3, 58, 36, 2, 59, 37 ], [ 4, 36, 16, 4, 37, 17 ], [ 4, 36, 12, 4, 37, 13 ], [ 2, 86, 68, 2, 87, 69 ], [ 4, 69, 43, 1, 70, 44 ], [ 6, 43, 19, 2, 44, 20 ], [ 6, 43, 15, 2, 44, 16 ], [ 4, 101, 81 ], [ 1, 80, 50, 4, 81, 51 ], [ 4, 50, 22, 4, 51, 23 ], [ 3, 36, 12, 8, 37, 13 ], [ 2, 116, 92, 2, 117, 93 ], [ 6, 58, 36, 2, 59, 37 ], [ 4, 46, 20, 6, 47, 21 ], [ 7, 42, 14, 4, 43, 15 ], [ 4, 133, 107 ], [ 8, 59, 37, 1, 60, 38 ], [ 8, 44, 20, 4, 45, 21 ], [ 12, 33, 11, 4, 34, 12 ], [ 3, 145, 115, 1, 146, 116 ], [ 4, 64, 40, 5, 65, 41 ], [ 11, 36, 16, 5, 37, 17 ], [ 11, 36, 12, 5, 37, 13 ], [ 5, 109, 87, 1, 110, 88 ], [ 5, 65, 41, 5, 66, 42 ], [ 5, 54, 24, 7, 55, 25 ], [ 11, 36, 12 ], [ 5, 122, 98, 1, 123, 99 ], [ 7, 73, 45, 3, 74, 46 ], [ 15, 43, 19, 2, 44, 20 ], [ 3, 45, 15, 13, 46, 16 ], [ 1, 135, 107, 5, 136, 108 ], [ 10, 74, 46, 1, 75, 47 ], [ 1, 50, 22, 15, 51, 23 ], [ 2, 42, 14, 17, 43, 15 ], [ 5, 150, 120, 1, 151, 121 ], [ 9, 69, 43, 4, 70, 44 ], [ 17, 50, 22, 1, 51, 23 ], [ 2, 42, 14, 19, 43, 15 ], [ 3, 141, 113, 4, 142, 114 ], [ 3, 70, 44, 11, 71, 45 ], [ 17, 47, 21, 4, 48, 22 ], [ 9, 39, 13, 16, 40, 14 ], [ 3, 135, 107, 5, 136, 108 ], [ 3, 67, 41, 13, 68, 42 ], [ 15, 54, 24, 5, 55, 25 ], [ 15, 43, 15, 10, 44, 16 ], [ 4, 144, 116, 4, 145, 117 ], [ 17, 68, 42 ], [ 17, 50, 22, 6, 51, 23 ], [ 19, 46, 16, 6, 47, 17 ], [ 2, 139, 111, 7, 140, 112 ], [ 17, 74, 46 ], [ 7, 54, 24, 16, 55, 25 ], [ 34, 37, 13 ], [ 4, 151, 121, 5, 152, 122 ], [ 4, 75, 47, 14, 76, 48 ], [ 11, 54, 24, 14, 55, 25 ], [ 16, 45, 15, 14, 46, 16 ], [ 6, 147, 117, 4, 148, 118 ], [ 6, 73, 45, 14, 74, 46 ], [ 11, 54, 24, 16, 55, 25 ], [ 30, 46, 16, 2, 47, 17 ], [ 8, 132, 106, 4, 133, 107 ], [ 8, 75, 47, 13, 76, 48 ], [ 7, 54, 24, 22, 55, 25 ], [ 22, 45, 15, 13, 46, 16 ], [ 10, 142, 114, 2, 143, 115 ], [ 19, 74, 46, 4, 75, 47 ], [ 28, 50, 22, 6, 51, 23 ], [ 33, 46, 16, 4, 47, 17 ], [ 8, 152, 122, 4, 153, 123 ], [ 22, 73, 45, 3, 74, 46 ], [ 8, 53, 23, 26, 54, 24 ], [ 12, 45, 15, 28, 46, 16 ], [ 3, 147, 117, 10, 148, 118 ], [ 3, 73, 45, 23, 74, 46 ], [ 4, 54, 24, 31, 55, 25 ], [ 11, 45, 15, 31, 46, 16 ], [ 7, 146, 116, 7, 147, 117 ], [ 21, 73, 45, 7, 74, 46 ], [ 1, 53, 23, 37, 54, 24 ], [ 19, 45, 15, 26, 46, 16 ], [ 5, 145, 115, 10, 146, 116 ], [ 19, 75, 47, 10, 76, 48 ], [ 15, 54, 24, 25, 55, 25 ], [ 23, 45, 15, 25, 46, 16 ], [ 13, 145, 115, 3, 146, 116 ], [ 2, 74, 46, 29, 75, 47 ], [ 42, 54, 24, 1, 55, 25 ], [ 23, 45, 15, 28, 46, 16 ], [ 17, 145, 115 ], [ 10, 74, 46, 23, 75, 47 ], [ 10, 54, 24, 35, 55, 25 ], [ 19, 45, 15, 35, 46, 16 ], [ 17, 145, 115, 1, 146, 116 ], [ 14, 74, 46, 21, 75, 47 ], [ 29, 54, 24, 19, 55, 25 ], [ 11, 45, 15, 46, 46, 16 ], [ 13, 145, 115, 6, 146, 116 ], [ 14, 74, 46, 23, 75, 47 ], [ 44, 54, 24, 7, 55, 25 ], [ 59, 46, 16, 1, 47, 17 ], [ 12, 151, 121, 7, 152, 122 ], [ 12, 75, 47, 26, 76, 48 ], [ 39, 54, 24, 14, 55, 25 ], [ 22, 45, 15, 41, 46, 16 ], [ 6, 151, 121, 14, 152, 122 ], [ 6, 75, 47, 34, 76, 48 ], [ 46, 54, 24, 10, 55, 25 ], [ 2, 45, 15, 64, 46, 16 ], [ 17, 152, 122, 4, 153, 123 ], [ 29, 74, 46, 14, 75, 47 ], [ 49, 54, 24, 10, 55, 25 ], [ 24, 45, 15, 46, 46, 16 ], [ 4, 152, 122, 18, 153, 123 ], [ 13, 74, 46, 32, 75, 47 ], [ 48, 54, 24, 14, 55, 25 ], [ 42, 45, 15, 32, 46, 16 ], [ 20, 147, 117, 4, 148, 118 ], [ 40, 75, 47, 7, 76, 48 ], [ 43, 54, 24, 22, 55, 25 ], [ 10, 45, 15, 67, 46, 16 ], [ 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, list = []; for (var i = 0; i < length; i++) { var count = rsBlock[i * 3 + 0], totalCount = rsBlock[i * 3 + 1], 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.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); this.buffer.length <= bufIndex && this.buffer.push(0), bit && (this.buffer[bufIndex] |= 128 >>> this.length % 8), this.length++; } }; var QRCodeLimitLength=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]]; function _isSupportCanvas() { return typeof CanvasRenderingContext2D != "undefined"; } // android 2.x doesn't support Data-URI spec function _getAndroid() { var android = false; var sAgent = navigator.userAgent; if (/android/i.test(sAgent)) { // android android = true; aMat = sAgent.toString().match(/android ([0-9].[0-9])/i); if (aMat && aMat[1]) { android = parseFloat(aMat[1]); } } return android; } var svgDrawer = (function() { var Drawing = function (el, htOption) { this._el = el; this._htOption = htOption; }; Drawing.prototype.draw = function (oQRCode) { var _htOption = this._htOption; var _el = this._el; var nCount = oQRCode.getModuleCount(); var nWidth = Math.floor(_htOption.width / nCount); var nHeight = Math.floor(_htOption.height / nCount); this.clear(); function makeSVG(tag, attrs) { var el = document.createElementNS('http://www.w3.org/2000/svg', tag); for (var k in attrs) if (attrs.hasOwnProperty(k)) el.setAttribute(k, attrs[k]); return el; } var svg = makeSVG("svg" , {'viewBox': '0 0 ' + String(nCount) + " " + String(nCount), 'width': '100%', 'height': '100%', 'fill': _htOption.colorLight}); svg.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", "http://www.w3.org/1999/xlink"); _el.appendChild(svg); svg.appendChild(makeSVG("rect", {"fill": _htOption.colorDark, "width": "1", "height": "1", "id": "template"})); for (var row = 0; row < nCount; row++) { for (var col = 0; col < nCount; col++) { if (oQRCode.isDark(row, col)) { var child = makeSVG("use", {"x": String(row), "y": String(col)}); child.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#template") svg.appendChild(child); } } } }; Drawing.prototype.clear = function () { while (this._el.hasChildNodes()) this._el.removeChild(this._el.lastChild); }; return Drawing; })(); var useSVG = document.documentElement.tagName.toLowerCase() === "svg"; // Drawing in DOM by using Table tag var Drawing = useSVG ? svgDrawer : !_isSupportCanvas() ? (function () { var Drawing = function (el, htOption) { this._el = el; this._htOption = htOption; }; /** * Draw the QRCode * * @param {QRCode} oQRCode */ Drawing.prototype.draw = function (oQRCode) { var _htOption = this._htOption; var _el = this._el; var nCount = oQRCode.getModuleCount(); var nWidth = Math.floor(_htOption.width / nCount); var nHeight = Math.floor(_htOption.height / nCount); var aHTML = ['<table style="border:0;border-collapse:collapse;">']; for (var row = 0; row < nCount; row++) { aHTML.push('<tr>'); for (var col = 0; col < nCount; col++) { aHTML.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;' + nWidth + 'px;height:' + nHeight + 'px;background-color:' + (oQRCode.isDark(row, col) ? _htOption.colorDark : _htOption.colorLight) + ';"></td>'); } aHTML.push('</tr>'); } aHTML.push('</table>'); _el.innerHTML = aHTML.join(''); // Fix the margin values as real size. var elTable = _el.childNodes[0]; var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2; var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2; if (nLeftMarginTable > 0 && nTopMarginTable > 0) { elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px"; } }; /** * Clear the QRCode */ Drawing.prototype.clear = function () { this._el.innerHTML = ''; }; return Drawing; })() : (function () { // Drawing in Canvas function _onMakeImage() { this._elImage.src = this._elCanvas.toDataURL("image/png"); this._elImage.style.display = "block"; this._elCanvas.style.display = "none"; } // Android 2.1 bug workaround // http://code.google.com/p/android/issues/detail?id=5141 if (this._android && this._android <= 2.1) { var factor = 1 / window.devicePixelRatio; var drawImage = CanvasRenderingContext2D.prototype.drawImage; CanvasRenderingContext2D.prototype.drawImage = function (image, sx, sy, sw, sh, dx, dy, dw, dh) { if (("nodeName" in image) && /img/i.test(image.nodeName)) { for (var i = arguments.length - 1; i >= 1; i--) { arguments[i] = arguments[i] * factor; } } else if (typeof dw == "undefined") { arguments[1] *= factor; arguments[2] *= factor; arguments[3] *= factor; arguments[4] *= factor; } drawImage.apply(this, arguments); }; } /** * Check whether the user's browser supports Data URI or not * * @private * @param {Function} fSuccess Occurs if it supports Data URI * @param {Function} fFail Occurs if it doesn't support Data URI */ function _safeSetDataURI(fSuccess, fFail) { var self = this; self._fFail = fFail; self._fSuccess = fSuccess; // Check it just once if (self._bSupportDataURI === null) { var el = document.createElement("img"); var fOnError = function() { self._bSupportDataURI = false; if (self._fFail) { _fFail.call(self); } }; var fOnSuccess = function() { self._bSupportDataURI = true; if (self._fSuccess) { self._fSuccess.call(self); } }; el.onabort = fOnError; el.onerror = fOnError; el.onload = fOnSuccess; el.src = "data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="; // the Image contains 1px data. return; } else if (self._bSupportDataURI === true && self._fSuccess) { self._fSuccess.call(self); } else if (self._bSupportDataURI === false && self._fFail) { self._fFail.call(self); } }; /** * Drawing QRCode by using canvas * * @constructor * @param {HTMLElement} el * @param {Object} htOption QRCode Options */ var Drawing = function (el, htOption) { this._bIsPainted = false; this._android = _getAndroid(); this._htOption = htOption; this._elCanvas = document.createElement("canvas"); this._elCanvas.width = htOption.width; this._elCanvas.height = htOption.height; el.appendChild(this._elCanvas); this._el = el; this._oContext = this._elCanvas.getContext("2d"); this._bIsPainted = false; this._elImage = document.createElement("img"); this._elImage.alt = "Scan me!"; this._elImage.style.display = "none"; this._el.appendChild(this._elImage); this._bSupportDataURI = null; }; /** * Draw the QRCode * * @param {QRCode} oQRCode */ Drawing.prototype.draw = function (oQRCode) { var _elImage = this._elImage; var _oContext = this._oContext; var _htOption = this._htOption; var nCount = oQRCode.getModuleCount(); var nWidth = _htOption.width / nCount; var nHeight = _htOption.height / nCount; var nRoundedWidth = Math.round(nWidth); var nRoundedHeight = Math.round(nHeight); _elImage.style.display = "none"; this.clear(); for (var row = 0; row < nCount; row++) { for (var col = 0; col < nCount; col++) { var bIsDark = oQRCode.isDark(row, col); var nLeft = col * nWidth; var nTop = row * nHeight; _oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; _oContext.lineWidth = 1; _oContext.fillStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; _oContext.fillRect(nLeft, nTop, nWidth, nHeight); // ?? ???? ?? ?? _oContext.strokeRect( Math.floor(nLeft) + 0.5, Math.floor(nTop) + 0.5, nRoundedWidth, nRoundedHeight ); _oContext.strokeRect( Math.ceil(nLeft) - 0.5, Math.ceil(nTop) - 0.5, nRoundedWidth, nRoundedHeight ); } } this._bIsPainted = true; }; /** * Make the image from Canvas if the browser supports Data URI. */ Drawing.prototype.makeImage = function () { if (this._bIsPainted) { _safeSetDataURI.call(this, _onMakeImage); } }; /** * Return whether the QRCode is painted or not * * @return {Boolean} */ Drawing.prototype.isPainted = function () { return this._bIsPainted; }; /** * Clear the QRCode */ Drawing.prototype.clear = function () { this._oContext.clearRect(0, 0, this._elCanvas.width, this._elCanvas.height); this._bIsPainted = false; }; /** * @private * @param {Number} nNumber */ Drawing.prototype.round = function (nNumber) { if (!nNumber) { return nNumber; } return Math.floor(nNumber * 1000) / 1000; }; return Drawing; })(); /** * Get the type by string length * * @private * @param {String} sText * @param {Number} nCorrectLevel * @return {Number} type */ function _getTypeNumber(sText, nCorrectLevel) { var nType = 1; var length = _getUTF8Length(sText); for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) { var nLimit = 0; switch (nCorrectLevel) { case QRErrorCorrectLevel.L : nLimit = QRCodeLimitLength[i][0]; break; case QRErrorCorrectLevel.M : nLimit = QRCodeLimitLength[i][1]; break; case QRErrorCorrectLevel.Q : nLimit = QRCodeLimitLength[i][2]; break; case QRErrorCorrectLevel.H : nLimit = QRCodeLimitLength[i][3]; break; } if (length <= nLimit) { break; } else { nType++; } } if (nType > QRCodeLimitLength.length) { throw new Error("Too long data"); } return nType; } function _getUTF8Length(sText) { var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a'); return replacedText.length + (replacedText.length != sText ? 3 : 0); } /** * @class QRCode * @constructor * @example * new QRCode(document.getElementById("test"), "http://jindo.dev.naver.com/collie"); * * @example * var oQRCode = new QRCode("test", { * text : "http://naver.com", * width : 128, * height : 128 * }); * * oQRCode.clear(); // Clear the QRCode. * oQRCode.makeCode("http://map.naver.com"); // Re-create the QRCode. * * @param {HTMLElement|String} el target element or 'id' attribute of element. * @param {Object|String} vOption * @param {String} vOption.text QRCode link data * @param {Number} [vOption.width=256] * @param {Number} [vOption.height=256] * @param {String} [vOption.colorDark="#000000"] * @param {String} [vOption.colorLight="#ffffff"] * @param {QRCode.CorrectLevel} [vOption.correctLevel=QRCode.CorrectLevel.H] [L|M|Q|H] */ QRCode = function (el, vOption) { this._htOption = { width : 256, height : 256, typeNumber : 4, colorDark : "#000000", colorLight : "#ffffff", correctLevel : QRErrorCorrectLevel.H }; if (typeof vOption === 'string') { vOption = { text : vOption }; } // Overwrites options if (vOption) { for (var i in vOption) { this._htOption[i] = vOption[i]; } } if (typeof el == "string") { el = document.getElementById(el); } this._android = _getAndroid(); this._el = el; this._oQRCode = null; this._oDrawing = new Drawing(this._el, this._htOption); if (this._htOption.text) { this.makeCode(this._htOption.text); } }; /** * Make the QRCode * * @param {String} sText link data */ QRCode.prototype.makeCode = function (sText) { this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel); this._oQRCode.addData(sText); this._oQRCode.make(); this._el.title = sText; this._oDrawing.draw(this._oQRCode); this.makeImage(); }; /** * Make the Image from Canvas element * - It occurs automatically * - Android below 3 doesn't support Data-URI spec. * * @private */ QRCode.prototype.makeImage = function () { if (typeof this._oDrawing.makeImage == "function" && (!this._android || this._android >= 3)) { this._oDrawing.makeImage(); } }; /** * Clear the QRCode */ QRCode.prototype.clear = function () { this._oDrawing.clear(); }; /** * @name QRCode.CorrectLevel */ QRCode.CorrectLevel = QRErrorCorrectLevel; })();
（2）压缩后(qrcode.min.js)：
var QRCode;!function(){function t(t){this.mode=u.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,r=this.data.length;e<r;e++){var o=[],i=this.data.charCodeAt(e);i>65536?(o[0]=240|(1835008&i)>>>18,o[1]=128|(258048&i)>>>12,o[2]=128|(4032&i)>>>6,o[3]=128|63&i):i>2048?(o[0]=224|(61440&i)>>>12,o[1]=128|(4032&i)>>>6,o[2]=128|63&i):i>128?(o[0]=192|(1984&i)>>>6,o[1]=128|63&i):o[0]=i,this.parsedData.push(o)}this.parsedData=Array.prototype.concat.apply([],this.parsedData),this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function e(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}function r(t,e){if(void 0==t.length)throw new Error(t.length+"/"+e);for(var r=0;r<t.length&&0==t[r];)r++;this.num=new Array(t.length-r+e);for(var o=0;o<t.length-r;o++)this.num[o]=t[o+r]}function o(t,e){this.totalCount=t,this.dataCount=e}function i(){this.buffer=[],this.length=0}function n(){return"undefined"!=typeof CanvasRenderingContext2D}function a(){var t=!1,e=navigator.userAgent;return/android/i.test(e)&&(t=!0,aMat=e.toString().match(/android ([0-9].[0-9])/i),aMat&&aMat[1]&&(t=parseFloat(aMat[1]))),t}function s(t,e){for(var r=1,o=h(t),i=0,n=p.length;i<=n;i++){var a=0;switch(e){case l.L:a=p[i][0];break;case l.M:a=p[i][1];break;case l.Q:a=p[i][2];break;case l.H:a=p[i][3]}if(o<=a)break;r++}if(r>p.length)throw new Error("Too long data");return r}function h(t){var e=encodeURI(t).toString().replace(/\%[0-9a-fA-F]{2}/g,"a");return e.length+(e.length!=t?3:0)}t.prototype={getLength:function(t){return this.parsedData.length},write:function(t){for(var e=0,r=this.parsedData.length;e<r;e++)t.put(this.parsedData[e],8)}},e.prototype={addData:function(e){var r=new t(e);this.dataList.push(r),this.dataCache=null},isDark:function(t,e){if(t<0||this.moduleCount<=t||e<0||this.moduleCount<=e)throw new Error(t+","+e);return this.modules[t][e]},getModuleCount:function(){return this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(t,r){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var o=0;o<this.moduleCount;o++){this.modules[o]=new Array(this.moduleCount);for(var i=0;i<this.moduleCount;i++)this.modules[o][i]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(t,r),this.typeNumber>=7&&this.setupTypeNumber(t),null==this.dataCache&&(this.dataCache=e.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,r)},setupPositionProbePattern:function(t,e){for(var r=-1;r<=7;r++)if(!(t+r<=-1||this.moduleCount<=t+r))for(var o=-1;o<=7;o++)e+o<=-1||this.moduleCount<=e+o||(0<=r&&r<=6&&(0==o||6==o)||0<=o&&o<=6&&(0==r||6==r)||2<=r&&r<=4&&2<=o&&o<=4?this.modules[t+r][e+o]=!0:this.modules[t+r][e+o]=!1)},getBestMaskPattern:function(){for(var t=0,e=0,r=0;r<8;r++){this.makeImpl(!0,r);var o=g.getLostPoint(this);(0==r||t>o)&&(t=o,e=r)}return e},createMovieClip:function(t,e,r){var o=t.createEmptyMovieClip(e,r),i=1;this.make();for(var n=0;n<this.modules.length;n++)for(var a=n*i,s=0;s<this.modules[n].length;s++){var h=s*i,u=this.modules[n][s];u&&(o.beginFill(0,100),o.moveTo(h,a),o.lineTo(h+i,a),o.lineTo(h+i,a+i),o.lineTo(h,a+i),o.endFill())}return o},setupTimingPattern:function(){for(var t=8;t<this.moduleCount-8;t++)null==this.modules[t][6]&&(this.modules[t][6]=t%2==0);for(var e=8;e<this.moduleCount-8;e++)null==this.modules[6][e]&&(this.modules[6][e]=e%2==0)},setupPositionAdjustPattern:function(){for(var t=g.getPatternPosition(this.typeNumber),e=0;e<t.length;e++)for(var r=0;r<t.length;r++){var o=t[e],i=t[r];if(null==this.modules[o][i])for(var n=-2;n<=2;n++)for(var a=-2;a<=2;a++)n==-2||2==n||a==-2||2==a||0==n&&0==a?this.modules[o+n][i+a]=!0:this.modules[o+n][i+a]=!1}},setupTypeNumber:function(t){for(var e=g.getBCHTypeNumber(this.typeNumber),r=0;r<18;r++){var o=!t&&1==(e>>r&1);this.modules[Math.floor(r/3)][r%3+this.moduleCount-8-3]=o}for(var r=0;r<18;r++){var o=!t&&1==(e>>r&1);this.modules[r%3+this.moduleCount-8-3][Math.floor(r/3)]=o}},setupTypeInfo:function(t,e){for(var r=this.errorCorrectLevel<<3|e,o=g.getBCHTypeInfo(r),i=0;i<15;i++){var n=!t&&1==(o>>i&1);i<6?this.modules[i][8]=n:i<8?this.modules[i+1][8]=n:this.modules[this.moduleCount-15+i][8]=n}for(var i=0;i<15;i++){var n=!t&&1==(o>>i&1);i<8?this.modules[8][this.moduleCount-i-1]=n:i<9?this.modules[8][15-i-1+1]=n:this.modules[8][15-i-1]=n}this.modules[this.moduleCount-8][8]=!t},mapData:function(t,e){for(var r=-1,o=this.moduleCount-1,i=7,n=0,a=this.moduleCount-1;a>0;a-=2)for(6==a&&a--;;){for(var s=0;s<2;s++)if(null==this.modules[o][a-s]){var h=!1;n<t.length&&(h=1==(t[n]>>>i&1));var u=g.getMask(e,o,a-s);u&&(h=!h),this.modules[o][a-s]=h,i--,i==-1&&(n++,i=7)}if(o+=r,o<0||this.moduleCount<=o){o-=r,r=-r;break}}}},e.PAD0=236,e.PAD1=17,e.createData=function(t,r,n){for(var a=o.getRSBlocks(t,r),s=new i,h=0;h<n.length;h++){var u=n[h];s.put(u.mode,4),s.put(u.getLength(),g.getLengthInBits(u.mode,t)),u.write(s)}for(var l=0,h=0;h<a.length;h++)l+=a[h].dataCount;if(s.getLengthInBits()>8*l)throw new Error("code length overflow. ("+s.getLengthInBits()+">"+8*l+")");for(s.getLengthInBits()+4<=8*l&&s.put(0,4);s.getLengthInBits()%8!=0;)s.putBit(!1);for(;!(s.getLengthInBits()>=8*l)&&(s.put(e.PAD0,8),!(s.getLengthInBits()>=8*l));)s.put(e.PAD1,8);return e.createBytes(s,a)},e.createBytes=function(t,e){for(var o=0,i=0,n=0,a=new Array(e.length),s=new Array(e.length),h=0;h<e.length;h++){var u=e[h].dataCount,l=e[h].totalCount-u;i=Math.max(i,u),n=Math.max(n,l),a[h]=new Array(u);for(var f=0;f<a[h].length;f++)a[h][f]=255&t.buffer[f+o];o+=u;var d=g.getErrorCorrectPolynomial(l),c=new r(a[h],d.getLength()-1),p=c.mod(d);s[h]=new Array(d.getLength()-1);for(var f=0;f<s[h].length;f++){var m=f+p.getLength()-s[h].length;s[h][f]=m>=0?p.get(m):0}}for(var v=0,f=0;f<e.length;f++)v+=e[f].totalCount;for(var _=new Array(v),C=0,f=0;f<i;f++)for(var h=0;h<e.length;h++)f<a[h].length&&(_[C++]=a[h][f]);for(var f=0;f<n;f++)for(var h=0;h<e.length;h++)f<s[h].length&&(_[C++]=s[h][f]);return _};for(var u={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},l={L:1,M:0,Q:3,H:2},f={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7},g={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]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(t){for(var e=t<<10;g.getBCHDigit(e)-g.getBCHDigit(g.G15)>=0;)e^=g.G15<<g.getBCHDigit(e)-g.getBCHDigit(g.G15);return(t<<10|e)^g.G15_MASK},getBCHTypeNumber:function(t){for(var e=t<<12;g.getBCHDigit(e)-g.getBCHDigit(g.G18)>=0;)e^=g.G18<<g.getBCHDigit(e)-g.getBCHDigit(g.G18);return t<<12|e},getBCHDigit:function(t){for(var e=0;0!=t;)e++,t>>>=1;return e},getPatternPosition:function(t){return g.PATTERN_POSITION_TABLE[t-1]},getMask:function(t,e,r){switch(t){case f.PATTERN000:return(e+r)%2==0;case f.PATTERN001:return e%2==0;case f.PATTERN010:return r%3==0;case f.PATTERN011:return(e+r)%3==0;case f.PATTERN100:return(Math.floor(e/2)+Math.floor(r/3))%2==0;case f.PATTERN101:return e*r%2+e*r%3==0;case f.PATTERN110:return(e*r%2+e*r%3)%2==0;case f.PATTERN111:return(e*r%3+(e+r)%2)%2==0;default:throw new Error("bad maskPattern:"+t)}},getErrorCorrectPolynomial:function(t){for(var e=new r([1],0),o=0;o<t;o++)e=e.multiply(new r([1,d.gexp(o)],0));return e},getLengthInBits:function(t,e){if(1<=e&&e<10)switch(t){case u.MODE_NUMBER:return 10;case u.MODE_ALPHA_NUM:return 9;case u.MODE_8BIT_BYTE:return 8;case u.MODE_KANJI:return 8;default:throw new Error("mode:"+t)}else if(e<27)switch(t){case u.MODE_NUMBER:return 12;case u.MODE_ALPHA_NUM:return 11;case u.MODE_8BIT_BYTE:return 16;case u.MODE_KANJI:return 10;default:throw new Error("mode:"+t)}else{if(!(e<41))throw new Error("type:"+e);switch(t){case u.MODE_NUMBER:return 14;case u.MODE_ALPHA_NUM:return 13;case u.MODE_8BIT_BYTE:return 16;case u.MODE_KANJI:return 12;default:throw new Error("mode:"+t)}}},getLostPoint:function(t){for(var e=t.getModuleCount(),r=0,o=0;o<e;o++)for(var i=0;i<e;i++){for(var n=0,a=t.isDark(o,i),s=-1;s<=1;s++)if(!(o+s<0||e<=o+s))for(var h=-1;h<=1;h++)i+h<0||e<=i+h||0==s&&0==h||a==t.isDark(o+s,i+h)&&n++;n>5&&(r+=3+n-5)}for(var o=0;o<e-1;o++)for(var i=0;i<e-1;i++){var u=0;t.isDark(o,i)&&u++,t.isDark(o+1,i)&&u++,t.isDark(o,i+1)&&u++,t.isDark(o+1,i+1)&&u++,0!=u&&4!=u||(r+=3)}for(var o=0;o<e;o++)for(var i=0;i<e-6;i++)t.isDark(o,i)&&!t.isDark(o,i+1)&&t.isDark(o,i+2)&&t.isDark(o,i+3)&&t.isDark(o,i+4)&&!t.isDark(o,i+5)&&t.isDark(o,i+6)&&(r+=40);for(var i=0;i<e;i++)for(var o=0;o<e-6;o++)t.isDark(o,i)&&!t.isDark(o+1,i)&&t.isDark(o+2,i)&&t.isDark(o+3,i)&&t.isDark(o+4,i)&&!t.isDark(o+5,i)&&t.isDark(o+6,i)&&(r+=40);for(var l=0,i=0;i<e;i++)for(var o=0;o<e;o++)t.isDark(o,i)&&l++;var f=Math.abs(100*l/e/e-50)/5;return r+=10*f}},d={glog:function(t){if(t<1)throw new Error("glog("+t+")");return d.LOG_TABLE[t]},gexp:function(t){for(;t<0;)t+=255;for(;t>=256;)t-=255;return d.EXP_TABLE[t]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},c=0;c<8;c++)d.EXP_TABLE[c]=1<<c;for(var c=8;c<256;c++)d.EXP_TABLE[c]=d.EXP_TABLE[c-4]^d.EXP_TABLE[c-5]^d.EXP_TABLE[c-6]^d.EXP_TABLE[c-8];for(var c=0;c<255;c++)d.LOG_TABLE[d.EXP_TABLE[c]]=c;r.prototype={get:function(t){return this.num[t]},getLength:function(){return this.num.length},multiply:function(t){for(var e=new Array(this.getLength()+t.getLength()-1),o=0;o<this.getLength();o++)for(var i=0;i<t.getLength();i++)e[o+i]^=d.gexp(d.glog(this.get(o))+d.glog(t.get(i)));return new r(e,0)},mod:function(t){if(this.getLength()-t.getLength()<0)return this;for(var e=d.glog(this.get(0))-d.glog(t.get(0)),o=new Array(this.getLength()),i=0;i<this.getLength();i++)o[i]=this.get(i);for(var i=0;i<t.getLength();i++)o[i]^=d.gexp(d.glog(t.get(i))+e);return new r(o,0).mod(t)}},o.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],o.getRSBlocks=function(t,e){var r=o.getRsBlockTable(t,e);if(void 0==r)throw new Error("bad rs block @ typeNumber:"+t+"/errorCorrectLevel:"+e);for(var i=r.length/3,n=[],a=0;a<i;a++)for(var s=r[3*a+0],h=r[3*a+1],u=r[3*a+2],l=0;l<s;l++)n.push(new o(h,u));return n},o.getRsBlockTable=function(t,e){switch(e){case l.L:return o.RS_BLOCK_TABLE[4*(t-1)+0];case l.M:return o.RS_BLOCK_TABLE[4*(t-1)+1];case l.Q:return o.RS_BLOCK_TABLE[4*(t-1)+2];case l.H:return o.RS_BLOCK_TABLE[4*(t-1)+3];default:return}},i.prototype={get:function(t){var e=Math.floor(t/8);return 1==(this.buffer[e]>>>7-t%8&1)},put:function(t,e){for(var r=0;r<e;r++)this.putBit(1==(t>>>e-r-1&1))},getLengthInBits:function(){return this.length},putBit:function(t){var e=Math.floor(this.length/8);this.buffer.length<=e&&this.buffer.push(0),t&&(this.buffer[e]|=128>>>this.length%8),this.length++}};var p=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]],m=function(){var t=function(t,e){this._el=t,this._htOption=e};return t.prototype.draw=function(t){function e(t,e){var r=document.createElementNS("http://www.w3.org/2000/svg",t);for(var o in e)e.hasOwnProperty(o)&&r.setAttribute(o,e[o]);return r}var r=this._htOption,o=this._el,i=t.getModuleCount();Math.floor(r.width/i),Math.floor(r.height/i);this.clear();var n=e("svg",{viewBox:"0 0 "+String(i)+" "+String(i),"100%",height:"100%",fill:r.colorLight});n.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink"),o.appendChild(n),n.appendChild(e("rect",{fill:r.colorDark,"1",height:"1",id:"template"}));for(var a=0;a<i;a++)for(var s=0;s<i;s++)if(t.isDark(a,s)){var h=e("use",{x:String(a),y:String(s)});h.setAttributeNS("http://www.w3.org/1999/xlink","href","#template"),n.appendChild(h)}},t.prototype.clear=function(){for(;this._el.hasChildNodes();)this._el.removeChild(this._el.lastChild)},t}(),v="svg"===document.documentElement.tagName.toLowerCase(),_=v?m:n()?function(){function t(){this._elImage.src=this._elCanvas.toDataURL("image/png"),this._elImage.style.display="block",this._elCanvas.style.display="none"}function e(t,e){var r=this;if(r._fFail=e,r._fSuccess=t,null===r._bSupportDataURI){var o=document.createElement("img"),i=function(){r._bSupportDataURI=!1,r._fFail&&_fFail.call(r)},n=function(){r._bSupportDataURI=!0,r._fSuccess&&r._fSuccess.call(r)};return o.onabort=i,o.onerror=i,o.onload=n,void(o.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==")}r._bSupportDataURI===!0&&r._fSuccess?r._fSuccess.call(r):r._bSupportDataURI===!1&&r._fFail&&r._fFail.call(r)}if(this._android&&this._android<=2.1){var r=1/window.devicePixelRatio,o=CanvasRenderingContext2D.prototype.drawImage;CanvasRenderingContext2D.prototype.drawImage=function(t,e,i,n,a,s,h,u,l){if("nodeName"in t&&/img/i.test(t.nodeName))for(var f=arguments.length-1;f>=1;f--)arguments[f]=arguments[f]*r;else"undefined"==typeof u&&(arguments[1]*=r,arguments[2]*=r,arguments[3]*=r,arguments[4]*=r);o.apply(this,arguments)}}var i=function(t,e){this._bIsPainted=!1,this._android=a(),this._htOption=e,this._elCanvas=document.createElement("canvas"),this._elCanvas.width=e.width,this._elCanvas.height=e.height,t.appendChild(this._elCanvas),this._el=t,this._oContext=this._elCanvas.getContext("2d"),this._bIsPainted=!1,this._elImage=document.createElement("img"),this._elImage.alt="Scan me!",this._elImage.style.display="none",this._el.appendChild(this._elImage),this._bSupportDataURI=null};return i.prototype.draw=function(t){var e=this._elImage,r=this._oContext,o=this._htOption,i=t.getModuleCount(),n=o.width/i,a=o.height/i,s=Math.round(n),h=Math.round(a);e.style.display="none",this.clear();for(var u=0;u<i;u++)for(var l=0;l<i;l++){var f=t.isDark(u,l),g=l*n,d=u*a;r.strokeStyle=f?o.colorDark:o.colorLight,r.lineWidth=1,r.fillStyle=f?o.colorDark:o.colorLight,r.fillRect(g,d,n,a),r.strokeRect(Math.floor(g)+.5,Math.floor(d)+.5,s,h),r.strokeRect(Math.ceil(g)-.5,Math.ceil(d)-.5,s,h)}this._bIsPainted=!0},i.prototype.makeImage=function(){this._bIsPainted&&e.call(this,t)},i.prototype.isPainted=function(){return this._bIsPainted},i.prototype.clear=function(){this._oContext.clearRect(0,0,this._elCanvas.width,this._elCanvas.height),this._bIsPainted=!1},i.prototype.round=function(t){return t?Math.floor(1e3*t)/1e3:t},i}():function(){var t=function(t,e){this._el=t,this._htOption=e};return t.prototype.draw=function(t){for(var e=this._htOption,r=this._el,o=t.getModuleCount(),i=Math.floor(e.width/o),n=Math.floor(e.height/o),a=['<table style="border:0;border-collapse:collapse;">'],s=0;s<o;s++){a.push("<tr>");for(var h=0;h<o;h++)a.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;'+i+"px;height:"+n+"px;background-color:"+(t.isDark(s,h)?e.colorDark:e.colorLight)+';"></td>');a.push("</tr>")}a.push("</table>"),r.innerHTML=a.join("");var u=r.childNodes[0],l=(e.width-u.offsetWidth)/2,f=(e.height-u.offsetHeight)/2;l>0&&f>0&&(u.style.margin=f+"px "+l+"px")},t.prototype.clear=function(){this._el.innerHTML=""},t}();QRCode=function(t,e){if(this._htOption={256,height:256,typeNumber:4,colorDark:"#000000",colorLight:"#ffffff",correctLevel:l.H},"string"==typeof e&&(e={text:e}),e)for(var r in e)this._htOption[r]=e[r];"string"==typeof t&&(t=document.getElementById(t)),this._android=a(),this._el=t,this._oQRCode=null,this._oDrawing=new _(this._el,this._htOption),this._htOption.text&&this.makeCode(this._htOption.text)},QRCode.prototype.makeCode=function(t){this._oQRCode=new e(s(t,this._htOption.correctLevel),this._htOption.correctLevel),this._oQRCode.addData(t),this._oQRCode.make(),this._el.title=t,this._oDrawing.draw(this._oQRCode),this.makeImage()},QRCode.prototype.makeImage=function(){"function"==typeof this._oDrawing.makeImage&&(!this._android||this._android>=3)&&this._oDrawing.makeImage()},QRCode.prototype.clear=function(){this._oDrawing.clear()},QRCode.CorrectLevel=l}();
2.使用
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>二维码生成</title> <script src="qrcode.min.js"></script> <style> .box { width: 110px; height: 110px; border: 1px solid #999; } #qrcode { width: 100px; height: 100px; margin: 5px auto; } </style> </head> <body> <div class="box"> <div id="qrcode"> </div> </div> <input type="text" id="text"> <br> <input type="button" id="btn" value="生成二维码"> </body> <script> document.getElementById('btn').onclick = function () { document.getElementById("qrcode").innerHTML = '' var text = document.getElementById('text').value; console.log(text); var qrcode = new QRCode(document.getElementById("qrcode"), { width : 100,//设置宽高 height : 100 }); qrcode.makeCode(text); } </script> </html>
则在文本框中输入相应的内容，点击按钮，即可生成二维码
效果：
