页面生成二维码并下载（页面下载，程序下载）

function QR8bitByte(a) {
    this.mode = QRMode.MODE_8BIT_BYTE,
        this.data = a
}

function QRCode(a, b) {
    this.typeNumber = a,
        this.errorCorrectLevel = b,
        this.modules = null,
        this.moduleCount = 0,
        this.dataCache = null,
        this.dataList = new Array()
}
function QRPolynomial(a, b) {
    var c, d;
    if (void 0 == a.length) {
        throw new Error(a.length + "/" + b)
    }
    for (c = 0; c < a.length && 0 == a[c];) {
        c++
    }
    for (this.num = new Array(a.length - c + b), d = 0; d < a.length - c; d++) {
        this.num[d] = a[d + c]
    }
}
function QRRSBlock(a, b) {
    this.totalCount = a,
        this.dataCount = b
}
function QRBitBuffer() {
    this.buffer = new Array(),
        this.length = 0
}
var QRMode, QRErrorCorrectLevel, QRMaskPattern, QRUtil, QRMath, i;
for (function (a) {
    a.fn.qrcode = function (b) {
        var c, d;
        return "string" == typeof b && (b = { text: b }),
            b = a.extend({}, {
                render: "canvas",
                width: 256,
                height: 256,
                //?????????????????
                imgWidth: b.width / 4.7,
                imgHeight: b.height / 4,
                typeNumber: -1,
                correctLevel: QRErrorCorrectLevel.H,
                background: "#ffffff",
                foreground: "#000000"
            }, b), c = function () {
                var c, d, e, f, g, h, i, j, k, a = new QRCode(b.typeNumber, b.correctLevel);
                for (a.addData(utf16to8(b.text)), a.make(),
                    c = document.createElement("canvas"),
                    c.width = b.width, c.height = b.height, d = c.getContext("2d"),
                    b.src && (e = new Image(), e.src = b.src, e.οnlοad = function () {
                        d.drawImage(e, (b.width - b.imgWidth) / 2, (b.height - b.imgHeight) / 2,
                            b.imgWidth, b.imgHeight)
                    }), f = b.width / a.getModuleCount(),
                    g = b.height / a.getModuleCount(), h = 0; h < a.getModuleCount(); h++) {
                    for (i = 0; i < a.getModuleCount(); i++) {
                        d.fillStyle = a.isDark(h, i) ? b.foreground : b.background,
                            j = Math.ceil((i + 1) * f) - Math.floor(i * f),
                            k = Math.ceil((h + 1) * f) - Math.floor(h * f),
                            d.fillRect(Math.round(i * f), Math.round(h * g), j, k)
                    }
                } return c
            },
            d = function () {
                var d, e, f, g, h, i,
                c = new QRCode(b.typeNumber, b.correctLevel);
                //?????tf16to8(b.text)???Text????????????????????????
                for (c.addData(utf16to8(b.text)), c.make(), d = a("<table></table>").css("width", b.width + "px").css("height", b.height + "px").css("border", "0px").css("border-collapse", "collapse").css("background-color", b.background), e = b.width / c.getModuleCount(), f = b.height / c.getModuleCount(), g = 0; g < c.getModuleCount(); g++) { for (h = a("<tr></tr>").css("height", f + "px").appendTo(d), i = 0; i < c.getModuleCount(); i++) { a("<td></td>").css("width", e + "px").css("background-color", c.isDark(g, i) ? b.foreground : b.background).appendTo(h) } } return d
            }, this.each(function () { var e = "canvas" == b.render ? c() : d(); a(e).appendTo(this) })
    }
}(jQuery), QR8bitByte.prototype = { getLength: function () { return this.data.length }, write: function (a) { for (var b = 0; b < this.data.length; b++) { a.put(this.data.charCodeAt(b), 8) } } }, QRCode.prototype = { addData: function (a) { var b = new QR8bitByte(a); this.dataList.push(b), this.dataCache = null }, isDark: function (a, b) { if (0 > a || this.moduleCount <= a || 0 > b || this.moduleCount <= b) { throw new Error(a + "," + b) } return this.modules[a][b] }, getModuleCount: function () { return this.moduleCount }, make: function () { var a, b, c, d, e, f; if (this.typeNumber < 1) { for (a = 1, a = 1; 40 > a; a++) { for (b = QRRSBlock.getRSBlocks(a, this.errorCorrectLevel), c = new QRBitBuffer(), d = 0, e = 0; e < b.length; e++) { d += b[e].dataCount } for (e = 0; e < this.dataList.length; e++) { f = this.dataList[e], c.put(f.mode, 4), c.put(f.getLength(), QRUtil.getLengthInBits(f.mode, a)), f.write(c) } if (c.getLengthInBits() <= 8 * d) { break } } this.typeNumber = a } this.makeImpl(!1, this.getBestMaskPattern()) }, makeImpl: function (a, b) { var c, d; for (this.moduleCount = 4 * this.typeNumber + 17, this.modules = new Array(this.moduleCount), c = 0; c < this.moduleCount; c++) { for (this.modules[c] = new Array(this.moduleCount), d = 0; d < this.moduleCount; d++) { this.modules[c][d] = null } } this.setupPositionProbePattern(0, 0), this.setupPositionProbePattern(this.moduleCount - 7, 0), this.setupPositionProbePattern(0, this.moduleCount - 7), this.setupPositionAdjustPattern(), this.setupTimingPattern(), this.setupTypeInfo(a, b), this.typeNumber >= 7 && this.setupTypeNumber(a), null == this.dataCache && (this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList)), this.mapData(this.dataCache, b) }, setupPositionProbePattern: function (a, b) { var c, d; for (c = -1; 7 >= c; c++) { if (!(-1 >= a + c || this.moduleCount <= a + c)) { for (d = -1; 7 >= d; d++) { -1 >= b + d || this.moduleCount <= b + d || (this.modules[a + c][b + d] = c >= 0 && 6 >= c && (0 == d || 6 == d) || d >= 0 && 6 >= d && (0 == c || 6 == c) || c >= 2 && 4 >= c && d >= 2 && 4 >= d ? !0 : !1) } } } }, getBestMaskPattern: function () { var c, d, a = 0, b = 0; for (c = 0; 8 > c; c++) { this.makeImpl(!0, c), d = QRUtil.getLostPoint(this), (0 == c || a > d) && (a = d, b = c) } return b }, createMovieClip: function (a, b, c) { var f, g, h, i, j, d = a.createEmptyMovieClip(b, c), e = 1; for (this.make(), f = 0; f < this.modules.length; f++) { for (g = f * e, h = 0; h < this.modules[f].length; h++) { i = h * e, j = this.modules[f][h], j && (d.beginFill(0, 100), d.moveTo(i, g), d.lineTo(i + e, g), d.lineTo(i + e, g + e), d.lineTo(i, g + e), d.endFill()) } } return d }, setupTimingPattern: function () { var a, b; for (a = 8; a < this.moduleCount - 8; a++) { null == this.modules[a][6] && (this.modules[a][6] = 0 == a % 2) } for (b = 8; b < this.moduleCount - 8; b++) { null == this.modules[6][b] && (this.modules[6][b] = 0 == b % 2) } }, setupPositionAdjustPattern: function () { var b, c, d, e, f, g, a = QRUtil.getPatternPosition(this.typeNumber); for (b = 0; b < a.length; b++) { for (c = 0; c < a.length; c++) { if (d = a[b], e = a[c], null == this.modules[d][e]) { for (f = -2; 2 >= f; f++) { for (g = -2; 2 >= g; g++) { this.modules[d + f][e + g] = -2 == f || 2 == f || -2 == g || 2 == g || 0 == f && 0 == g ? !0 : !1 } } } } } }, setupTypeNumber: function (a) { var c, d, b = QRUtil.getBCHTypeNumber(this.typeNumber); for (c = 0; 18 > c; c++) { d = !a && 1 == (1 & b >> c), this.modules[Math.floor(c / 3)][c % 3 + this.moduleCount - 8 - 3] = d } for (c = 0; 18 > c; c++) { d = !a && 1 == (1 & b >> c), this.modules[c % 3 + this.moduleCount - 8 - 3][Math.floor(c / 3)] = d } }, setupTypeInfo: function (a, b) { var e, f, c = this.errorCorrectLevel << 3 | b, d = QRUtil.getBCHTypeInfo(c); for (e = 0; 15 > e; e++) { f = !a && 1 == (1 & d >> e), 6 > e ? this.modules[e][8] = f : 8 > e ? this.modules[e + 1][8] = f : this.modules[this.moduleCount - 15 + e][8] = f } for (e = 0; 15 > e; e++) { f = !a && 1 == (1 & d >> e), 8 > e ? this.modules[8][this.moduleCount - e - 1] = f : 9 > e ? this.modules[8][15 - e - 1 + 1] = f : this.modules[8][15 - e - 1] = f } this.modules[this.moduleCount - 8][8] = !a }, mapData: function (a, b) { var g, h, i, j, c = -1, d = this.moduleCount - 1, e = 7, f = 0; for (g = this.moduleCount - 1; g > 0; g -= 2) { for (6 == g && g--; ;) { for (h = 0; 2 > h; h++) { null == this.modules[d][g - h] && (i = !1, f < a.length && (i = 1 == (1 & a[f] >>> e)), j = QRUtil.getMask(b, d, g - h), j && (i = !i), this.modules[d][g - h] = i, e-- , -1 == e && (f++ , e = 7)) } if (d += c, 0 > d || this.moduleCount <= d) { d -= c, c = -c; break } } } } }, QRCode.PAD0 = 236, QRCode.PAD1 = 17, QRCode.createData = function (a, b, c) { var f, g, h, d = QRRSBlock.getRSBlocks(a, b), e = new QRBitBuffer(); for (f = 0; f < c.length; f++) { g = c[f], e.put(g.mode, 4), e.put(g.getLength(), QRUtil.getLengthInBits(g.mode, a)), g.write(e) } for (h = 0, f = 0; f < d.length; f++) { h += d[f].dataCount } if (e.getLengthInBits() > 8 * h) { throw new Error("code length overflow. (" + e.getLengthInBits() + ">" + 8 * h + ")") } for (e.getLengthInBits() + 4 <= 8 * h && e.put(0, 4); 0 != e.getLengthInBits() % 8;) { e.putBit(!1) } for (; ;) { if (e.getLengthInBits() >= 8 * h) { break } if (e.put(QRCode.PAD0, 8), e.getLengthInBits() >= 8 * h) { break } e.put(QRCode.PAD1, 8) } return QRCode.createBytes(e, d) }, QRCode.createBytes = function (a, b) { var h, i, j, k, l, m, n, o, p, q, r, c = 0, d = 0, e = 0, f = new Array(b.length), g = new Array(b.length); for (h = 0; h < b.length; h++) { for (i = b[h].dataCount, j = b[h].totalCount - i, d = Math.max(d, i), e = Math.max(e, j), f[h] = new Array(i), k = 0; k < f[h].length; k++) { f[h][k] = 255 & a.buffer[k + c] } for (c += i, l = QRUtil.getErrorCorrectPolynomial(j), m = new QRPolynomial(f[h], l.getLength() - 1), n = m.mod(l), g[h] = new Array(l.getLength() - 1), k = 0; k < g[h].length; k++) { o = k + n.getLength() - g[h].length, g[h][k] = o >= 0 ? n.get(o) : 0 } } for (p = 0, k = 0; k < b.length; k++) { p += b[k].totalCount } for (q = new Array(p), r = 0, k = 0; d > k; k++) { for (h = 0; h < b.length; h++) { k < f[h].length && (q[r++] = f[h][k]) } } for (k = 0; e > k; k++) { for (h = 0; h < b.length; h++) { k < g[h].length && (q[r++] = g[h][k]) } } return q }, 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 (a) { for (var b = a << 10; QRUtil.getBCHDigit(b) - QRUtil.getBCHDigit(QRUtil.G15) >= 0;) { b ^= QRUtil.G15 << QRUtil.getBCHDigit(b) - QRUtil.getBCHDigit(QRUtil.G15) } return (a << 10 | b) ^ QRUtil.G15_MASK }, getBCHTypeNumber: function (a) { for (var b = a << 12; QRUtil.getBCHDigit(b) - QRUtil.getBCHDigit(QRUtil.G18) >= 0;) { b ^= QRUtil.G18 << QRUtil.getBCHDigit(b) - QRUtil.getBCHDigit(QRUtil.G18) } return a << 12 | b }, getBCHDigit: function (a) { for (var b = 0; 0 != a;) { b++ , a >>>= 1 } return b }, getPatternPosition: function (a) { return QRUtil.PATTERN_POSITION_TABLE[a - 1] }, getMask: function (a, b, c) { switch (a) { case QRMaskPattern.PATTERN000: return 0 == (b + c) % 2; case QRMaskPattern.PATTERN001: return 0 == b % 2; case QRMaskPattern.PATTERN010: return 0 == c % 3; case QRMaskPattern.PATTERN011: return 0 == (b + c) % 3; case QRMaskPattern.PATTERN100: return 0 == (Math.floor(b / 2) + Math.floor(c / 3)) % 2; case QRMaskPattern.PATTERN101: return 0 == b * c % 2 + b * c % 3; case QRMaskPattern.PATTERN110: return 0 == (b * c % 2 + b * c % 3) % 2; case QRMaskPattern.PATTERN111: return 0 == (b * c % 3 + (b + c) % 2) % 2; default: throw new Error("bad maskPattern:" + a) } }, getErrorCorrectPolynomial: function (a) { var c, b = new QRPolynomial([1], 0); for (c = 0; a > c; c++) { b = b.multiply(new QRPolynomial([1, QRMath.gexp(c)], 0)) } return b }, getLengthInBits: function (a, b) { if (b >= 1 && 10 > b) { switch (a) { 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:" + a) } } else { if (27 > b) { switch (a) { 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:" + a) } } else { if (!(41 > b)) { throw new Error("type:" + b) } switch (a) { 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:" + a) } } } }, getLostPoint: function (a) { var d, e, f, g, h, i, j, k, l, b = a.getModuleCount(), c = 0; for (d = 0; b > d; d++) { for (e = 0; b > e; e++) { for (f = 0, g = a.isDark(d, e), h = -1; 1 >= h; h++) { if (!(0 > d + h || d + h >= b)) { for (i = -1; 1 >= i; i++) { 0 > e + i || e + i >= b || (0 != h || 0 != i) && g == a.isDark(d + h, e + i) && f++ } } } f > 5 && (c += 3 + f - 5) } } for (d = 0; b - 1 > d; d++) { for (e = 0; b - 1 > e; e++) { j = 0, a.isDark(d, e) && j++ , a.isDark(d + 1, e) && j++ , a.isDark(d, e + 1) && j++ , a.isDark(d + 1, e + 1) && j++ , (0 == j || 4 == j) && (c += 3) } } for (d = 0; b > d; d++) { for (e = 0; b - 6 > e; e++) { a.isDark(d, e) && !a.isDark(d, e + 1) && a.isDark(d, e + 2) && a.isDark(d, e + 3) && a.isDark(d, e + 4) && !a.isDark(d, e + 5) && a.isDark(d, e + 6) && (c += 40) } } for (e = 0; b > e; e++) { for (d = 0; b - 6 > d; d++) { a.isDark(d, e) && !a.isDark(d + 1, e) && a.isDark(d + 2, e) && a.isDark(d + 3, e) && a.isDark(d + 4, e) && !a.isDark(d + 5, e) && a.isDark(d + 6, e) && (c += 40) } } for (k = 0, e = 0; b > e; e++) { for (d = 0; b > d; d++) { a.isDark(d, e) && k++ } } return l = Math.abs(100 * k / b / b - 50) / 5, c += 10 * l } }, QRMath = { glog: function (a) { if (1 > a) { throw new Error("glog(" + a + ")") } return QRMath.LOG_TABLE[a] }, gexp: function (a) { for (; 0 > a;) { a += 255 } for (; a >= 256;) { a -= 255 } return QRMath.EXP_TABLE[a] }, EXP_TABLE: new Array(256), LOG_TABLE: new Array(256) }, i = 0; 8 > i; i++) { QRMath.EXP_TABLE[i] = 1 << i } for (i = 8; 256 > i; 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 (i = 0; 255 > i; i++) { QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i } QRPolynomial.prototype = { get: function (a) { return this.num[a] }, getLength: function () { return this.num.length }, multiply: function (a) { var c, d, b = new Array(this.getLength() + a.getLength() - 1); for (c = 0; c < this.getLength(); c++) { for (d = 0; d < a.getLength(); d++) { b[c + d] ^= QRMath.gexp(QRMath.glog(this.get(c)) + QRMath.glog(a.get(d))) } } return new QRPolynomial(b, 0) }, mod: function (a) { var b, c, d; if (this.getLength() - a.getLength() < 0) { return this } for (b = QRMath.glog(this.get(0)) - QRMath.glog(a.get(0)), c = new Array(this.getLength()), d = 0; d < this.getLength(); d++) { c[d] = this.get(d) } for (d = 0; d < a.getLength(); d++) { c[d] ^= QRMath.gexp(QRMath.glog(a.get(d)) + b) } return new QRPolynomial(c, 0).mod(a) } }, 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 (a, b) { var d, e, f, g, h, i, j, c = QRRSBlock.getRsBlockTable(a, b); if (void 0 == c) { throw new Error("bad rs block @ typeNumber:" + a + "/errorCorrectLevel:" + b) } for (d = c.length / 3, e = new Array(), f = 0; d > f; f++) { for (g = c[3 * f + 0], h = c[3 * f + 1], i = c[3 * f + 2], j = 0; g > j; j++) { e.push(new QRRSBlock(h, i)) } } return e }, QRRSBlock.getRsBlockTable = function (a, b) { switch (b) { case QRErrorCorrectLevel.L: return QRRSBlock.RS_BLOCK_TABLE[4 * (a - 1) + 0]; case QRErrorCorrectLevel.M: return QRRSBlock.RS_BLOCK_TABLE[4 * (a - 1) + 1]; case QRErrorCorrectLevel.Q: return QRRSBlock.RS_BLOCK_TABLE[4 * (a - 1) + 2]; case QRErrorCorrectLevel.H: return QRRSBlock.RS_BLOCK_TABLE[4 * (a - 1) + 3]; default: return void 0 } }, QRBitBuffer.prototype = { get: function (a) { var b = Math.floor(a / 8); return 1 == (1 & this.buffer[b] >>> 7 - a % 8) }, put: function (a, b) { for (var c = 0; b > c; c++) { this.putBit(1 == (1 & a >>> b - c - 1)) } }, getLengthInBits: function () { return this.length }, putBit: function (a) { var b = Math.floor(this.length / 8); this.buffer.length <= b && this.buffer.push(0), a && (this.buffer[b] |= 128 >>> this.length % 8), this.length++ } };

/* utf.js - UTF-8 <=> UTF-16 convertion
 *
 * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
 * Version: 1.0
 * LastModified: Dec 25 1999
 * This library is free.  You can redistribute it and/or modify it.
 */

/*
 * Interfaces:
 * utf8 = utf16to8(utf16);
 * utf16 = utf16to8(utf8);
 */

function utf16to8(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;
}

function utf8to16(str) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = str.length;
    i = 0;
    while (i < len) {
        c = str.charCodeAt(i++);
        switch (c >> 4) {
            case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
                // 0xxxxxxx
                out += str.charAt(i - 1);
                break;
            case 12: case 13:
                // 110x xxxx   10xx xxxx
                char2 = str.charCodeAt(i++);
                out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
                break;
            case 14:
                // 1110 xxxx  10xx xxxx  10xx xxxx
                char2 = str.charCodeAt(i++);
                char3 = str.charCodeAt(i++);
                out += String.fromCharCode(((c & 0x0F) << 12) |
                    ((char2 & 0x3F) << 6) |
                    ((char3 & 0x3F) << 0));
                break;
        }
    }

    return out;
}

<script src="~/ewm/jquery.qrcode.js"></script>
<script src="~/ewm/utf.js"></script>

<div id="ewmImg"><div>
<script type="text/javascript">
var ewm = "https://www.cnblogs.com/ZxtIsCnblogs";//初始内容
    function init(url) {
        $("#ewmImg").html("");//清理div
      $("#ewmImg").qrcode({
       render: "canvas",    //设置渲染方式，有table和canvas，使用canvas方式渲染性能相对来说比较好
       text: url,    //扫描二维码后显示的内容,可以直接填一个网址，扫描二维码后自动跳向该链接
       width: "300",               //二维码的宽度
       height: "300",              //二维码的高度
       background: "#ffffff",       //二维码的后景色
       foreground: "#000000"//,        //二维码的前景色
       src: ‘https://images.cnblogs.com/cnblogs_com/ZxtIsCnblogs/1106236/o_J1.png‘             //二维码中间的图片
       });
     }
    init(ewm);
</script>

<input type="button" onclick="dcEWM(‘https://www.baidu.com/‘)" value="导出" />

<script>
    var now = getDate();
    function dcEWM(Url) {
        init(Url);
        getDate();
        var img = document.getElementById("ewmImg").getElementsByTagName("canvas"); 
        var alink = document.createElement("a");
        alink.href = img[0].toDataURL("image/png");
        alink.download = now + ".png";
        alink.click();
    }

    function getDate() {
        var myDate = new Date();
        //获取当前年
        var year = myDate.getFullYear();
        //获取当前月
        var month = myDate.getMonth() + 1;
        //获取当前日
        var date = myDate.getDate();
        var h = myDate.getHours(); //获取当前小时数(0-23)
        var m = myDate.getMinutes(); //获取当前分钟数(0-59)
        var s = myDate.getSeconds();
        //获取当前时间
        now = year +"" +month+ date + h+ m  + s;
    }
</script>

 public string DCUrl(string Url, int width, int height)
        {//二维码内容，宽，高
            string Response = "";
            try
            {
                BarcodeWriter writer = new BarcodeWriter();
                writer.Format = BarcodeFormat.QR_CODE;
                QrCodeEncodingOptions options = new QrCodeEncodingOptions();
                options.DisableECI = true;
                //设置内容编码
                options.CharacterSet = "UTF-8";
                //将传来的值赋给二维码的宽度和高度
                options.Width = Convert.ToInt32(width);
                options.Height = Convert.ToInt32(height);
                //设置二维码的边距,单位不是固定像素
                options.Margin = 1;
                writer.Options = options;

                Bitmap map = writer.Write(Url);
                string di = "DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";
                string strDesktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);//获取桌面地址//
                string path = Path.Combine(strDesktopPath, di);//保存路径
                map.Save(path, ImageFormat.Png);
                map.Dispose();
                Response = "二维码生成成功！";
            }
            catch (Exception)
            {
                Response = "二维码生成失败！";
            }
            return Response;
        }