前端导出Excel表格
import XLSX from "xlsx";
let common = {
install: function ($Vue) {
let Vue = $Vue.prototype;
let common = {
// 导出excel表格
// data：导出参数，name：表格名称，cols： 每列宽度
exportExcel(data, name, cols = []) {
let sheet = XLSX.utils.aoa_to_sheet(data)
sheet['!cols'] = cols
this.downExcel(this.sheetBlob(sheet), name)
},
downExcel(url, saveName) {
if (typeof url === 'object' && url instanceof Blob) {
url = URL.createObjectURL(url) // 创建blob地址
}
let aLink = document.createElement('a')
aLink.href = url
aLink.download = saveName || '' // HTML5新增的属性，指定保存文件名，可以不要后缀，注意，file:///模式下不会生效
let event
if (window.MouseEvent) event = new MouseEvent('click')
else {
event = document.createEvent('MouseEvents')
event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
}
aLink.dispatchEvent(event)
},
// 将一个sheet转成最终的excel文件的blob对象，然后利用下载
sheetBlob(sheet, sheetName) {
sheetName = sheetName || 'sheet1'
let workbook = {
SheetNames: [sheetName],
Sheets: {}
}
workbook.Sheets[sheetName] = sheet
// 生成excel的配置项
let wopts = {
bookType: 'xlsx', // 要生成的文件类型
bookSST: false, // 是否生成Shared String Table，官方解释是，如果开启生成速度会下降，但在低版本IOS设备上有更好的兼容性
type: 'binary'
}
let wbout = XLSX.write(workbook, wopts)
let blob = new Blob([s2ab(wbout)], {
type: 'application/octet-stream'
})
// 字符串转ArrayBuffer
function s2ab(s) {
if (typeof ArrayBuffer !== 'undefined') {
var buf = new ArrayBuffer(s.length);
var view = new Uint8Array(buf);
for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
return buf;
} else {
var buf = new Array(s.length);
for (var i = 0; i != s.length; ++i) buf[i] = s.charCodeAt(i) & 0xFF;
return buf;
}
}
return blob
}
}
// 将公共方法复制到原型上
Vue.$common = common;
}
}
export default common;