前端表格导出excel文件（粘贴即用）

Posted 2023-03-05 奥特曼　

1.下载 file-saver 和 script-loader

npm install -S file-saver xlsx
npm install -D script-loader

2.新建js文件 不用知道干嘛的 能用就行 

utils/excel/Blob.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));

utils/excel/Export2Excel.js

/* eslint-disable */
// require('script-loader!file-saver');
// require('script-loader!src/vendor/Blob');
// require('script-loader!./Blob');
// require('script-loader!xlsx/dist/xlsx.core.min');

import 'script-loader!file-saver'
import 'script-loader!./Blob'
import 'script-loader!xlsx/dist/xlsx.core.min'
import * as XLSX from 'xlsx'
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 exportJsonToExcel(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")

3. 使用

 <el-button @click="downLoad">下载</el-button>

<script>
export default 
  name: 'HomeView',
  data () 
    return 
      tableData: [
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1518'
      , 
        date: '2016-05-04',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1517'
      , 
        date: '2016-05-01',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1519'
      , 
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516'
      ]
    
  ,
  methods: 
    downLoad () 
      require.ensure([], () => 
        const  exportJsonToExcel  = require('@/utils/excel/Export2Excel')// 此处把路径要写对
        const tHeader = ['日期', '名字', '地址']
        // 上面设置Excel的表格第一行的标题
        const filterVal = ['date', 'name', 'address']
        // 上面的index、nickName、name是tableData里对象的属性
        const list = this.tableData // 把data里的tableData存到list
        const data = this.formatJson(filterVal, list)
        exportJsonToExcel(tHeader, data, '表格')// "列表excel"  是下载后的表名 可修改
      )
    ,
    formatJson (filterVal, jsonData) 
      return jsonData.map(v => 
        return filterVal.map(j => v[j])
      )
    
  

</script>

导出结果