微信小程序生成Excel
Posted ZackSock
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微信小程序生成Excel
一、问题描述
最近一直在查找在微信小程序中生成Excel的办法。需求就是根据一个json数据或者对象数组，生成一个Excel文件，或者打开Excel文件。网上找了很久，没找到很有效的解决办法。最后自己动手做了一个，不过生成效率还比较低。
二、实现思路
我比较赞同的方法有两种，第一种是使用api来实现。如果你有个服务器，那么一切就好办了。只需要把数据传给服务器，然后服务器生成Excel文件，并返回文件的url。之后通过wx.downloadFile下载文件，配合wx.openDocument打开文件即可。至于如何编写一个返回Excel文件url的api，方法就太多了。
但是不是所有人都有服务器，所以还得相关离线的办法生成Excel文件。我的思路是，Excel文件本身是一个压缩文件，我们只需要安装Excel的目录结构，逐个文件和文件夹创建，如何将文件压缩为xx.xlsx文件即可。
结果查找，腾讯狗没有提供压缩相关的api。不过js倒是有现成jszip库可以使用，有了jszip，我们就可以开始实现了。
三、具体实现
先下载jszip库，然后将dist中的js文件放到小程序下的utils目录下。
在pages/index/index.wxml中写个按钮：
<!--index.wxml-->
<view class="container">
<view>
<button bindtap="createXLSX_zip">生成压缩包</button>
</view>
</view>
然后在pages/index/index.js中最上面导入JSZip：
const JSZip = require("../../utils/jszip");
并编写响应函数：
createXLSX_zip()
const fs = wx.getFileSystemManager();
let zip = new JSZip();
const content = [
name: 'zack', age: 21, gender: 'male',
name: 'alice', age: 20, gender: 'female',
name: 'atom', age: 23, gender: 'male',
name: 'rudy', age: 22, gender: 'male',
]
let contentXML = "";
let idx = 0
//按照Excel的规则，生成xml字符串
let sheetData = `<row r="1" span="1:3">`
let keys = Object.keys(content[0])
for (let i = 0; i < keys.length; i++)
contentXML += `<si><t>$keys[i]</t></si>`
sheetData += `<c r="$String.fromCharCode(i + 'A'.charCodeAt())1" t="s"><v>$idx</v></c>`
idx += 1
sheetData += '</row>'
for (let i = 0; i < content.length; i++)
sheetData += `<row r="$i + 2" span="1:3">`
for (let j = 0; j < keys.length; j++)
contentXML += `<si><t>$content[i][keys[j]]</t></si>`
sheetData += `<c r="$String.fromCharCode(j + 'A'.charCodeAt())$j + 2" t="s"><v>$idx</v></c>`
idx += 1
sheetData += "</row>"
wx.showLoading(
title: '正在生成',
)
zip.folder("docProps")
zip.folder("xl")
zip.folder("_rels")
zip.file("[Content_Types].xml", '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/><Default Extension="xml" ContentType="application/xml"/><Override PartName="/docProps/app.xml" ContentType="application/vnd.openxmlformats-officedocument.extended-properties+xml"/><Override PartName="/docProps/core.xml" ContentType="application/vnd.openxmlformats-package.core-properties+xml"/><Override PartName="/docProps/custom.xml" ContentType="application/vnd.openxmlformats-officedocument.custom-properties+xml"/><Override PartName="/xl/sharedStrings.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml"/><Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/><Override PartName="/xl/theme/theme1.xml" ContentType="application/vnd.openxmlformats-officedocument.theme+xml"/><Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/><Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/></Types>')
zip.file(`docProps/app.xml`, '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/extended-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes"><Application>SheetJS</Application><HeadingPairs><vt:vector size="2" baseType="variant"><vt:variant><vt:lpstr>工作表</vt:lpstr></vt:variant><vt:variant><vt:i4>1</vt:i4></vt:variant></vt:vector></HeadingPairs><TitlesOfParts><vt:vector size="1" baseType="lpstr"><vt:lpstr>Sheet1</vt:lpstr></vt:vector></TitlesOfParts></Properties>')
zip.file(`docProps/core.xml`, '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<cp:coreProperties xmlns:cp="http://schemas.openxmlformats.org/package/2006/metadata/core-properties" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><cp:lastModifiedBy>ivx</cp:lastModifiedBy><dcterms:created xsi:type="dcterms:W3CDTF">2022-07-11T07:23:00Z</dcterms:created><dcterms:modified xsi:type="dcterms:W3CDTF">2022-07-11T07:25:43Z</dcterms:modified></cp:coreProperties>')
zip.file(`docProps/custom.xml`, '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/custom-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes"><property fmtid="D5CDD505-2E9C-101B-9397-08002B2CF9AE" pid="2" name="ICV"><vt:lpwstr>784038AB04864B7497D2D5CF431A9FF0</vt:lpwstr></property><property fmtid="D5CDD505-2E9C-101B-9397-08002B2CF9AE" pid="3" name="KSOProductBuildVer"><vt:lpwstr>2052-11.1.0.11830</vt:lpwstr></property></Properties>')
zip.folder(`xl/theme`)
zip.folder(`xl/worksheets`)
zip.folder(`xl/_rels`)
zip.file(`xl/sharedStrings.xml`, `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<sst xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" count="$keys.length * (content.length + 1)" uniqueCount="$keys.length * (content.length + 1)">$contentXML</sst>`)
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zip.file(`xl/workbook.xml`, '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><fileVersion appName="xl" lastEdited="3" lowestEdited="5" rupBuild="9302"/><workbookPr codeName="ThisWorkbook"/><bookViews><workbookView windowWidth="24225" windowHeight="11940"/></bookViews><sheets><sheet name="Sheet1" sheetId="1" r:id="rId1"/></sheets><calcPr calcId="144525"/></workbook>')
zip.file(`xl/theme/theme1.xml`, '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\\n<a:theme xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" name="Office Theme"><a:themeElements><a:clrScheme name="Office"><a:dk1><a:sysClr val="windowText" lastClr="000000"/></a:dk1><a:lt1><a:sysClr val="window" lastClr="FFFFFF"/></a:lt1><a:dk2><a:srgbClr val="1F497D"/></a:dk2><a:lt2><a:srgbClr val="EEECE1"/></a:lt2><a:accent1><a:srgbClr val="4F81BD"/></a:accent1><a:accent2><a:srgbClr val="C0504D"/></a:accent2><a:accent3><a:srgbClr val="9BBB59"/></a:accent3><a:accent4><a:srgbClr val="8064A2"/></a:accent4><a:accent5><a:srgbClr val="4BACC6"/></a:accent5><a:accent6><a:srgbClr val="F79646"/></a:accent6><a:hlink><a:srgbClr val="0000FF"/></a:hlink><a:folHlink><a:srgbClr val="800080"/></a:folHlink></a:clrScheme><a:fontScheme name="Office"><a:majorFont><a:latin typeface="Cambria"/><a:ea typeface=""/><a:cs typeface=""/><a:font script="Jpan" typeface="ＭＳ Ｐゴシック"/><a:font script="Hang" typeface="맑은 고딕"/><a:font script="Hans" typeface="宋体"/><a:font script="Hant" typeface="新細明體"/><a:font script="Arab" typeface="Times New Roman"/><a:font script="Hebr" typeface="Times New Roman"/><a:font script="Thai" typeface="Tahoma"/><a:font script="Ethi" typeface="Nyala"/><a:font script="Beng" typeface="Vrinda"/><a:font script="Gujr" typeface="Shruti"/><a:font script="Khmr" typeface="MoolBoran"/><a:font script="Knda" typeface="Tunga"/><a:font script="Guru" typeface="Raavi"/><a:font script="Cans" typeface="Euphemia"/><a:font script="Cher" typeface="Plantagenet Cherokee"/><a:font script="Yiii" typeface="Microsoft Yi Baiti"/><a:font script="Tibt" typeface="Microsoft Himalaya"/><a:font script="Thaa" typeface="MV Boli"/><a:font script="Deva" typeface="Mangal"/><a:font script="Telu" typeface="Gautami"/><a:font script="Taml" typeface="Latha"/><a:font script="Syrc" typeface="Estrangelo Edessa"/><a:font script="Orya" typeface="Kalinga"/><a:font script="Mlym" typeface="Kartika"/><a:font script="Laoo" typeface="DokChampa"/><a:font script="Sinh" typeface="Iskoola Pota"/><a:font script="Mong" typeface="Mongolian Baiti"/><a:font script="Viet" typeface="Times New Roman"/><a:font script="Uigh" typeface="Microsoft Uighur"/><a:font script="Geor" typeface="Sylfaen"/></a:majorFont><a:minorFont>&l以上是关于微信小程序生成Excel的主要内容，如果未能解决你的问题，请参考以下文章
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