【vue开发】vue导出Excel表格教程&demo
前端工作量最多的就是需求,需求就是一直在变,比如当前端数据写完之后,需要用Excel把数据下载出来;再比如前端在没有数据库想写些demo玩时,也是很好的选择。
第一步安装依赖包,修改配置
1、装依赖:
cnpm install file-saver
cnpm install xlsx
cnpm install script-loader
2、修改配置:
在如下截图文件位置新增一行即可:'vendor': path.resolve(__dirname, '../src/vendor'),//新增加一行
【提示】若新建的项目出现严格模式报错,修改如下文件,增加src/*
第二步在项目中创建一个新的文件夹用于存放Blob和Export2Excel两个js文件(需要把这个两个文件复制到自己的目录中)
Export2Excel.js源码如下:
/* eslint-disable */ require('script-loader!file-saver'); // require('script-loader!src/vendor/Blob'); // require('script-loader!./Blob'); //这个本来有但是去掉功能暂无受影响 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") }
Blob.js源码如下:
/* 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 ));
第三步在你组件中使用
tHeader:标题
filterVal:字段名
tableData:前端请求的数据
我写的demo组件源码如下:
<template> <!-- 这是导出Excel的demo --> <div class="hello "> <van-field v-model="info.username" label="用户" placeholder="请输入用户名" /> <van-field v-model="info.sex" label="性别" placeholder="请输入性别" /> <van-field v-model="info.age" label="年龄" placeholder="请输入年龄" /> <van-field v-model="info.phone" label="手机" placeholder="请输入手机号" /> <van-field v-model="info.city" label="城市" placeholder="请输入城市" /> <van-button class="margin-top" type="primary" @click="exportTo()">继续添加</van-button> <van-button class="margin-left" type="primary" @click="exportToExcel()">导出表格</van-button> <div class="text-left mid-auto margin-top"> <div v-for="item in intData">{{item.username}}-{{item.sex}}-{{item.age}}-{{item.phone}}-{{item.city}}</br></div> </div> </div> </template> <script> import Vue from 'vue'; import { Button, Field } from 'vant'; import 'vant/lib/index.css'; Vue.use(Button); Vue.use(Field); export default { name: 'HelloWorld', data() { return { info: { username: '', phone: '', city: "", sex: "", age: "", }, tableData: [], intData: [], } }, methods: { exportTo() { //push数据 接触双向绑定 this.intData.push(JSON.parse(JSON.stringify(this.info))); this.tableData = this.intData; console.log(this.tableData) // let {username,phone,city,sex,age} = this.info; //表单置空继续输入 this.info.username = ""; this.info.phone = ""; this.info.city = ""; this.info.sex = ""; this.info.age = ""; }, exportToExcel() { console.log('提交了', this.tableData) //excel数据导出 require.ensure([], () => { const { export_json_to_excel } = require('../vendor/Export2Excel'); const tHeader = ['用户名', '性别', '年龄', '手机号', '城市', ]; const filterVal = ['username', 'sex', 'age', 'phone', 'city']; const list = this.tableData; const data = this.formatJson(filterVal, list); export_json_to_excel(tHeader, data, '列表excel'); }) }, formatJson(filterVal, jsonData) { return jsonData.map(v => filterVal.map(j => v[j])) } } } </script> <!-- Add "scoped" attribute to limit CSS to this component only --> <style scoped> h1, h2 { font-weight: normal; } ul { list-style-type: none; padding: 0; } li { display: inline-block; margin: 0 10px; } a { color: #42b983; } .text-left { text-align: left; } .mid-auto { width: 86%; margin: auto; } .margin-top { margin-top: 20px; } .margin-left { margin-left: 20px; } </style>
demo截图如下:
导出的表格如下:
温馨提示:
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本文来自博客园,作者:JeckHui;
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转载请注明原文链接:https://www.cnblogs.com/xiaohuizhang/p/11463509.html