vue 表格导出excel

首先：安装依赖

cnpm install  file-saver

cnpm install xlsx

cnpm install script-loader

然后在src目录下，新建vendor目录，存放Blob.js和Export2Excel.js文件
Blob.js

/* eslint-disable */
/* Blob.js*/

/*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

            , origin = /^[\w-]+:\/*\[?[\w\.:-]+\]?(?::[0-9]+)?/
        ;
        FakeBlob.fake = FB_proto.fake = true;
        while (file_ex_code--) {
            FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
        }
        // Polyfill URL
        if (!real_URL.createObjectURL) {
            URL = view.URL = function (uri) {
                var
                    uri_info = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
                    , uri_origin
                ;
                uri_info.href = uri;
                if (!("origin" in uri_info)) {
                    if (uri_info.protocol.toLowerCase() === "data:") {
                        uri_info.origin = null;
                    } else {
                        uri_origin = uri.match(origin);
                        uri_info.origin = uri_origin && uri_origin[1];
                    }
                }
                return uri_info;
            };
        }
        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 = 0;
            delete this.data;
        };
        return FakeBlobBuilder;
    }(view));

    view.Blob = function (blobParts, options) {
        var type = options ? (options.type || "") : "";
        var builder = new BlobBuilder();
        if (blobParts) {
            for (var i = 0, len = blobParts.length; i < len; i++) {
                if (Uint8Array && blobParts[i] instanceof Uint8Array) {
                    builder.append(blobParts[i].buffer);
                }
                else {
                    builder.append(blobParts[i]);
                }
            }
        }
        var blob = builder.getBlob(type);
        if (!blob.slice && blob.webkitSlice) {
            blob.slice = blob.webkitSlice;
        }
        return blob;
    };

    var getPrototypeOf = Object.getPrototypeOf || function (object) {
        return object.__proto__;
    };
    view.Blob.prototype = getPrototypeOf(new view.Blob());
}(
    typeof self !== "undefined" && self
    || typeof window !== "undefined" && window
    || this
));

Export2Excel.js

/* eslint-disable */
require('./Blob');
require('script-loader!file-saver');
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);
    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row => row.map(val => {
        /*先判断是否为null/undefined*/
        if (val == null) {
            return { 'wch': 10 };
        }
        /*再判断是否为中文*/
        else if (val.toString().charCodeAt(0) > 255) {
            return { 'wch': val.toString().length * 2 + 5 };
        } else {
            return { 'wch': val.toString().length + 5 };
        }
    }));
    /*以第一行为初始值*/    let result = colWidth[0];
    for (let i = 1; i < colWidth.length; i++) {
        for (let j = 0; j < colWidth[i].length; j++) {
            if (result[j]['wch'] < colWidth[i][j]['wch']) {
                result[j]['wch'] = colWidth[i][j]['wch'];
            }
        }
    }
    ws['!cols'] = result;

    /* 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")
}

最后在组件里面引用：（this.tableTitleData用于设置表头内容，在data(){}里面设置）

        exportExcel() {
              // 导出表格的表头设置
                let allColumns = this.tableTitleData;
                var columnNames = [];
                var columnValues = [];
                for (var i = 0; i < allColumns.length; i++) {
                    columnNames[i] = allColumns[i].label;
                    columnValues[i] = allColumns[i].prop
                }
                require.ensure([], () => {
                    const { export_json_to_excel } = require('vendor/Export2Excel'); //设置的别名，也可以直接使用../vendor/Export2Excel
                    const tHeader = columnNames;
                    const filterVal = columnValues;
                    const list = this.Tab;
                    const data = this.formatJson(filterVal, list);
                    export_json_to_excel(tHeader, data, 'test')
                })
    
        },
        formatJson(filterVal, jsonData) {
            return jsonData.map(v => filterVal.map(j => v[j]))
        },

设置方法：在/build/webpack.base.conf.js中新增一行代码

  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      'vendor': resolve('src/vendor')
    }
  },