nodejs 導(dǎo)出 Excel

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安裝依賴

• npm install xlsx --save
• npm install xlsx-style --save
• npm install fs --save

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修改文件

• 在導(dǎo)出 xlsx 文件中 表格展示內(nèi)容樣式錯誤 請修改下列文件部分內(nèi)容。

• 在 node_modules/xlsx-style下的xlsx.js文件中，把 write_ws_xml_data()替換成下列這個，導(dǎo)出excel沒有樣式，直接修改方法。

function write_ws_xml_data(ws, opts, idx, wb) {var o = [], r = [], range = safe_decode_range(ws['!ref']), cell, ref, rr = "", cols = [], R, C,rows = ws['!rows'];for(C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);for(R = range.s.r; R <= range.e.r; ++R) {r = [];rr = encode_row(R);for(C = range.s.c; C <= range.e.c; ++C) {ref = cols[C] + rr;if(ws[ref] === undefined) continue;if((cell = write_ws_xml_cell(ws[ref], ref, ws, opts, idx, wb)) != null) r.push(cell);}if(r.length > 0){params = ({r:rr});if(rows && rows[R]) {row = rows[R];if(row.hidden) params.hidden = 1;height = -1;if (row.hpx) height = row.hpx;else if (row.hpt) height = row.hpt;if (height > -1) { params.ht = height; params.customHeight = 1; }if (row.level) { params.outlineLevel = row.level; }}o[o.length] = (writextag('row', r.join(""), params));}}if(rows) for(; R < rows.length; ++R) {if(rows && rows[R]) {params = ({r:R+1});row = rows[R];if(row.hidden) params.hidden = 1;height = -1;if (row.hpx) height = row.hpx;else if (row.hpt) height = row.hpt;if (height > -1) { params.ht = height; params.customHeight = 1; }if (row.level) { params.outlineLevel = row.level; }o[o.length] = (writextag('row', "", params));}}return o.join(""); }

使用 導(dǎo)出Excel 功能

• ExcelData ：[{},{},{}] —— 需要自定義單元格樣式 或者 合并單元 使用下列格式
  let ExcelData = [{
  value : String // 單元格內(nèi)容
  style ：Object //單元格樣式
  colSpan ： Number //以當(dāng)前單元格為起點(diǎn) 合并列的單元格
  rowSpan ： Number //以當(dāng)前單元格為起點(diǎn) 合并行的單元格
  }];
• workSheet ：需要自定義行高或者列表 合并單元等等
  let workSheet = {
  “!merges” : [ {
  s: { //s為開始 c: 1,//開始列 r: 0//可以看成開始行,實(shí)際是取值范圍 },
  e: { // e結(jié)束 c: 4,//結(jié)束列 r: 0//結(jié)束行 }
  }],
  “!cols” : [{wch:10},{wch:10}],
  “!rows” : [{hpx:20},{hpx:20}],
  };

// 使用 導(dǎo)出Excel 功能 const excel = async () => {let ExcelHeaders = ['標(biāo)題1','標(biāo)題2','標(biāo)題3','標(biāo)題4'];let ExcelData = [[1,11,111,1111],[2,22,222,2222],[3,33,333,3333],[4,44,444,4444],];// 創(chuàng)建工作簿const buffer = await new ExportExcel().createWorkBook([{ ExcelHeaders,ExcelData, sheetName: '車輛入場通知單', workSheet : {} }, // sheet1// { ExcelData, sheetName: '車輛入場通知單', workSheet : {} }, // sheet2]);// const filename = `${DateUtils.format(new Date(), 'yyyyMMdd')}.xlsx`;// await fs.writeFileSync(`./${filename}`, buffer, { flag: 'w' }); }

功能實(shí)現(xiàn)詳細(xì)代碼

import * as xlsx from 'xlsx'; import * as XLSX_STYLE from 'xlsx-style'; import * as fs from 'fs';// 導(dǎo)出并生成Excel class ExportExcel {/*** 邊框樣式*/BorderStyle = {border: {color: {auto: 1},top: {style: 'thin'},bottom: {style: 'thin'},left: {style: 'thin'},right: {style: 'thin'}}};/** 默認(rèn)樣式 */defaultStyle = {...this.BorderStyle,alignment: {/// 自動換行wrapText: true,// 內(nèi)容在單元格 居中horizontal: "center",vertical: "center",},font: {name: "宋體",sz: 12, // 字體大小color: {auto: 1},bgColor : '#fff'},};/*** 默認(rèn)標(biāo)題樣式*/defaultTitleStyle = {...this.defaultStyle,font: {name: "宋體",sz: 12,color: {auto: 1},bold : true, // 字體加粗},};/*** 將對象數(shù)組按指定屬性順序轉(zhuǎn)為二維數(shù)組* @param objects 對象數(shù)組* @param props 對象的屬性列表,屬性可寫為數(shù)組,數(shù)組只包含兩個值,* 第一個值為對象屬性名,第二個值為過濾函數(shù)*/static objectsToRows(objects, props) {const rows = [];for (let i = 0; i < objects.length; i++) {const row = [];const item = objects[i];for (const key of props) {if (key instanceof Array) {row.push(key[1](item[key[0]]));} else {row.push(item[key]);}}rows.push(row);}return rows;}/*** 設(shè)置顯示數(shù)據(jù)樣式顯示* @param RowData 數(shù)據(jù)* @param isBold 顯示內(nèi)容是否加粗* @returns {*}*/setRowData(RowData = [],isBold = false,index = 0){for (let i = 0; i < RowData.length; i++) {if(RowData[i] instanceof Array){this.setRowData(RowData[i],isBold,(i + index));}else if(RowData[i] instanceof Object){if(!this.merges){this.merges = [];}let {value = '', style = {}, colSpan = 0, rowSpan = 0} = RowData[i];RowData[i] = {v: value, s: {...this.defaultStyle, ...style}};if(rowSpan > 0){this.merges.push({s: {c: i,r: index},e: {c: i,r: (index + rowSpan) }})}if(rowSpan === 0 && colSpan > 0){this.merges.push({s: {c: i,r: index},e: {c: (colSpan + i),r: index }})}}else {if(isBold){RowData[i] = {v: RowData[i] || '', s: this.defaultTitleStyle};}else {RowData[i] = {v: RowData[i] || '', s: this.defaultStyle};}}}return RowData;}/** * ExcelData = [{value : String 單元格內(nèi)容style ：Object 單元格樣式colSpan ： Number 以當(dāng)前單元格為起點(diǎn) 合并列的單元格rowSpan ： Number 以當(dāng)前單元格為起點(diǎn) 合并行的單元格}]workSheet = {"!merges" : [ {s: { //s為開始 c: 1,//開始列 r: 0//可以看成開始行,實(shí)際是取值范圍 },e: { // e結(jié)束 c: 4,//結(jié)束列 r: 0//結(jié)束行 }}];}*/createSheet = async ({ExcelHeaders = [], ExcelData = [] , workSheet = {}}) => {const data = [];if(ExcelHeaders.length){const headers = await this.setRowData(ExcelHeaders, true );data.push(headers);}// 表格數(shù)據(jù)內(nèi)容let rowData = await this.setRowData(ExcelData, false, data.length );data.push(...rowData);let sheet = xlsx.utils.aoa_to_sheet(data, {cellDates: true, cellStyles: true});// 表單合并情況sheet["!merges"] = this.merges || [];// 表格每列顯示的列寬let cols = [];if(workSheet['cols']){for(let i = 0; i < workSheet['cols'].length; i++){cols.push({wch: workSheet['cols'][i] || 10})}workSheet['!cols'] = cols;}else {for(let i = 0; i < ExcelHeaders.length; i++){cols.push({wch: ExcelHeaders[i] || 10})}}sheet["!cols"] = cols;// 表格顯示 行高let rows = [];if(ExcelHeaders.length) {rows.push({hpx: 30});}for(let i = 0; i < ExcelData.length; i++){rows.push({hpx: 24})}sheet['!rows'] = rows;return {...sheet, ...workSheet};};/*** 創(chuàng)建 Excel 工作簿* @param data Array 可創(chuàng)建一個或者多個 sheet* @returns {Promise<*>}*/createWorkBook = async (data = []) => {// 創(chuàng)建一個工作簿const workBook = xlsx.utils.book_new();for(let i = 0; i < data.length; i++){let sheet = await this.createSheet(data[i]);if(sheet){let sheetName = `sheet${i}`;if(data[i].sheetName){sheetName = data[i].sheetName;}xlsx.utils.book_append_sheet(workBook, sheet, sheetName);}}// 返回寫入數(shù)據(jù) bufferreturn XLSX_STYLE.write(workBook, {type: 'buffer'});};}export {ExportExcel};

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