前端导出 excel（基于 Blob.js 和 Export2Excel.js 做前端导出）

var out = [];

var rows = table.querySelectorAll('tr');

var ranges = [];

for (var R = 0; R < rows.length; ++R) {

    var outRow = [];

    var row = rows[R];

    var columns = row.querySelectorAll('td');

    for (var C = 0; C < columns.length; ++C) {

        var cell = columns[C];

        var colspan = cell.getAttribute('colspan');

        var rowspan = cell.getAttribute('rowspan');

        var cellValue = cell.innerText;

        if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

        //Skip ranges

        ranges.forEach(function (range) {

            if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {

                for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);

            }

        });

        //Handle Row Span

        if (rowspan || colspan) {

            rowspan = rowspan || 1;

            colspan = colspan || 1;

            ranges.push({ s: { r: R, c: outRow.length }, e: { r: R + rowspan - 1, c: outRow.length + colspan - 1 } });

        }

        ;

        //Handle Value

        outRow.push(cellValue !== "" ? cellValue : null);

        //Handle Colspan

        if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);

    }

    out.push(outRow);

}

return [out, ranges];

if (date1904) v += 1462;

var epoch = Date.parse(v);

return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);

var ws = {};

var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };

for (var R = 0; R != data.length; ++R) {

    for (var C = 0; C != data[R].length; ++C) {

        if (range.s.r > R) range.s.r = R;

        if (range.s.c > C) range.s.c = C;

        if (range.e.r < R) range.e.r = R;

        if (range.e.c < C) range.e.c = C;

        var cell = { v: data[R][C] };

        if (cell.v == null) continue;

        var cell_ref = XLSX.utils.encode_cell({ c: C, r: R });

        if (typeof cell.v === 'number') cell.t = 'n';

        else if (typeof cell.v === 'boolean') cell.t = 'b';

        else if (cell.v instanceof Date) {

            cell.t = 'n';

            cell.z = XLSX.SSF._table[14];

            cell.v = datenum(cell.v);

        }

        else cell.t = 's';

        ws[cell_ref] = cell;

    }

}

if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);

return ws;

if (!(this instanceof Workbook)) return new Workbook();

this.SheetNames = [];

this.Sheets = {};

var buf = new ArrayBuffer(s.length);

var view = new Uint8Array(buf);

for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;

return buf;

var theTable = document.getElementById(id);

var oo = generateArray(theTable);

var ranges = oo[1];

/* original data */

var data = oo[0];

var ws_name = "SheetJS";

var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

/* add ranges to worksheet */

// ws['!cols'] = ['apple', 'banan'];

ws['!merges'] = ranges;

/* add worksheet to workbook */

wb.SheetNames.push(ws_name);

wb.Sheets[ws_name] = ws;

var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), "test.xlsx")

/* original data */

var data = jsonData;

data.unshift(th);

var ws_name = "SheetJS";

var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

/* add worksheet to workbook */

wb.SheetNames.push(ws_name);

wb.Sheets[ws_name] = ws;

var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

var title = defaultTitle || '列表'

saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), title + ".xlsx")

"use strict";

view.URL = view.URL || view.webkitURL;

if (view.Blob && view.URL) {

    try {

        new Blob;

        return;

    } catch (e) {}

}

// Internally we use a BlobBuilder implementation to base Blob off of

// in order to support older browsers that only have BlobBuilder

var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) {

        var

            get_class = function(object) {

                return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];

            }

            , FakeBlobBuilder = function BlobBuilder() {

                this.data = [];

            }

            , FakeBlob = function Blob(data, type, encoding) {

                this.data = data;

                this.size = data.length;

                this.type = type;

                this.encoding = encoding;

            }

            , FBB_proto = FakeBlobBuilder.prototype

            , FB_proto = FakeBlob.prototype

            , FileReaderSync = view.FileReaderSync

            , FileException = function(type) {

                this.code = this[this.name = type];

            }

            , file_ex_codes = (

                "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "

                + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"

            ).split(" ")

            , file_ex_code = file_ex_codes.length

            , real_URL = view.URL || view.webkitURL || view

            , real_create_object_URL = real_URL.createObjectURL

            , real_revoke_object_URL = real_URL.revokeObjectURL

            , URL = real_URL

            , btoa = view.btoa

            , atob = view.atob

            , ArrayBuffer = view.ArrayBuffer

            , Uint8Array = view.Uint8Array

            ;

        FakeBlob.fake = FB_proto.fake = true;

        while (file_ex_code--) {

            FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;

        }

        if (!real_URL.createObjectURL) {

            URL = view.URL = {};

        }

        URL.createObjectURL = function(blob) {

            var

                type = blob.type

                , data_URI_header

                ;

            if (type === null) {

                type = "application/octet-stream";

            }

            if (blob instanceof FakeBlob) {

                data_URI_header = "data:" + type;

                if (blob.encoding === "base64") {

                    return data_URI_header + ";base64," + blob.data;

                } else if (blob.encoding === "URI") {

                    return data_URI_header + "," + decodeURIComponent(blob.data);

                } if (btoa) {

                    return data_URI_header + ";base64," + btoa(blob.data);

                } else {

                    return data_URI_header + "," + encodeURIComponent(blob.data);

                }

            } else if (real_create_object_URL) {

                return real_create_object_URL.call(real_URL, blob);

            }

        };

        URL.revokeObjectURL = function(object_URL) {

            if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {

                real_revoke_object_URL.call(real_URL, object_URL);

            }

        };

        FBB_proto.append = function(data/*, endings*/) {

            var bb = this.data;

            // decode data to a binary string

            if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {

                var

                    str = ""

                    , buf = new Uint8Array(data)

                    , i = 0

                    , buf_len = buf.length

                    ;

                for (; i < buf_len; i++) {

                    str += String.fromCharCode(buf[i]);

                }

                bb.push(str);

            } else if (get_class(data) === "Blob" || get_class(data) === "File") {

                if (FileReaderSync) {

                    var fr = new FileReaderSync;

                    bb.push(fr.readAsBinaryString(data));

                } else {

                    // async FileReader won't work as BlobBuilder is sync

                    throw new FileException("NOT_READABLE_ERR");

                }

            } else if (data instanceof FakeBlob) {

                if (data.encoding === "base64" && atob) {

                    bb.push(atob(data.data));

                } else if (data.encoding === "URI") {

                    bb.push(decodeURIComponent(data.data));

                } else if (data.encoding === "raw") {

                    bb.push(data.data);

                }

            } else {

                if (typeof data !== "string") {

                    data += ""; // convert unsupported types to strings

                }

                // decode UTF-16 to binary string

                bb.push(unescape(encodeURIComponent(data)));

            }

        };

        FBB_proto.getBlob = function(type) {

            if (!arguments.length) {

                type = null;

            }

            return new FakeBlob(this.data.join(""), type, "raw");

        };

        FBB_proto.toString = function() {

            return "[object BlobBuilder]";

        };

        FB_proto.slice = function(start, end, type) {

            var args = arguments.length;

            if (args < 3) {

                type = null;

            }

            return new FakeBlob(

                this.data.slice(start, args > 1 ? end : this.data.length)

                , type

                , this.encoding

            );

        };

        FB_proto.toString = function() {

            return "[object Blob]";

        };

        FB_proto.close = function() {

            this.size = this.data.length = 0;

        };

        return FakeBlobBuilder;

    }(view));

view.Blob = function Blob(blobParts, options) {

    var type = options ? (options.type || "") : "";

    var builder = new BlobBuilder();

    if (blobParts) {

        for (var i = 0, len = blobParts.length; i < len; i++) {

            builder.append(blobParts[i]);

        }

    }

    return builder.getBlob(type);

};

return filterVal.map(j => {

  return v[j]

})

let [th, filekey, data, fileName] = [[], [], [], ""];

let lebData = await this.getExcelData(); //表格主要数据，通过下面的方法接收

if (!fileName) fileName = '商品统计表'; //文件名

    if (!filekey.length) {

        filekey = lebData.filekey;

    }

if (!th.length) th = lebData.header; //表头

data = data.concat(lebData.exportData);

exportExcel(th, filekey, fileName, data); //导出数据的核心方法

productTrendApi({dateLimit:this.dateLimitPram}).then(res=>{

    let header = ['日期/时间','浏览量','新增商品数量','收藏量','加购件数','下单商品数','交易成功商品数']; //设置表头

    let filekey = ['date','pageView','addProductNum','collectNum','addCartNum','orderProductNum','orderSuccessProductNum']; //设置表头对应的key值

    let exportData = new Array();

    exportData = res.map((item)=>{

    return {

        date:item.date,

        pageView:item.pageView,

        addProductNum:item.addProductNum,

        collectNum:item.collectNum,

        addCartNum:item.addCartNum,

        orderProductNum:item.orderProductNum,

        orderSuccessProductNum:item.orderSuccessProductNum

    }

  })

  resolve({header,filekey,exportData}); //将上面的数据转为 Promise 对象

})