1、安装依赖

cnpm install -S file-saver xlsx

cnpm install -D script-loader

2.例如在src文件夹中新建一个名为vendor（vendor---名字任取）的文件夹，在该文件夹下放置2个文件Blob.js和 Export2Excel.js。

3.配置build文件夹中的webpack.base.conf.js（注：如果webpack报解析错误）

4.应用

1 export2Excel() { 2     require.ensure([], () => { 3         const { export_json_to_excel } = require('vendor/Export2Excel'); 4         const tHeader = ['序号', 'IMSI', 'MSISDN', '证件号码', '姓名']; 5         const filterVal = ['ID', 'imsi', 'msisdn', 'address', 'name']; 6         const list = this.tableData; 7         const data = this.formatJson(filterVal, list); 8         export_json_to_excel(tHeader, data, '列表excel'); 9     })10 },11 //将数组处理成索引数组12 formatJson(filterVal, jsonData) {13     return jsonData.map(v => filterVal.map(j => v[j]))14 }

 5.Blob.js和 Export2Excel.js

①Blob.js

/* eslint-disable *//* Blob.js * A Blob implementation. * 2014-05-27 * * By Eli Grey, http://eligrey.com * By Devin Samarin, https://github.com/eboyjr * License: X11/MIT *   See LICENSE.md *//*global self, unescape *//*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true, plusplus: true *//*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */(function (view) {    "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);    };}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));

②Export2Excel.js

/* eslint-disable */require('script-loader!file-saver');require('script-loader!vendor/Blob');require('script-loader!xlsx/dist/xlsx.core.min');function generateArray(table) {    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];};function datenum(v, date1904) {    if (date1904) v += 1462;    var epoch = Date.parse(v);    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);}function sheet_from_array_of_arrays(data, opts) {    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;}function Workbook() {    if (!(this instanceof Workbook)) return new Workbook();    this.SheetNames = [];    this.Sheets = {};}function s2ab(s) {    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;}export function export_table_to_excel(id) {    var theTable = document.getElementById(id);    console.log('a')    var oo = generateArray(theTable);    var ranges = oo[1];    /* original data */    var data = oo[0];    var ws_name = "SheetJS";    console.log(data);    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")}function formatJson(jsonData) {    console.log(jsonData)}export function export_json_to_excel(th, jsonData, defaultTitle) {    /* 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")}

 

参考链接：

作者：smile.轉角

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