安裝

導(dǎo)入導(dǎo)出excel這是前端做管理系統(tǒng)最常用的功能了，
這里使用到了兩個(gè)組件: file-saver （用于保存文件） xlsx (用于導(dǎo)入導(dǎo)出excel)

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

2.建立文件

打開你的vue項(xiàng)目镰绎，在src/js文件夾下新建 json2excel.js韩容。

import { saveAs } from 'file-saver'
import XLSX from 'xlsx/dist/xlsx.full.min'


// 將json數(shù)據(jù)處理為xlsx需要的格式
function datenum(v, date1904) {
    if (date1904) v += 1462
    let epoch = Date.parse(v)
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000)
}


function data2ws(data) {
    const ws = {}
    const range = {s: {c: 10000000, r: 10000000}, e: {c: 0, r: 0}}
    for (let R = 0; R != data.length; ++R) {
        for (let 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
            const cell = { v: data[R][C] }
            if (cell.v == null) continue
            const 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
}
// 導(dǎo)出Excel
function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook()
    this.SheetNames = []
    this.Sheets = {}
}


function s2ab(s) {
    const buf = new ArrayBuffer(s.length)
    const view = new Uint8Array(buf)
    for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF
    return buf
}


/*
* th => 表頭
* data => 數(shù)據(jù)
* fileName => 文件名
* fileType => 文件類型
* sheetName => sheet頁(yè)名
*/
export default function toExcel ({th, data, fileName, fileType, sheetName}) {
    data.unshift(th)
    const wb = new Workbook(), ws = data2ws(data)
    sheetName = sheetName || 'sheet1'
    wb.SheetNames.push(sheetName)
    wb.Sheets[sheetName] = ws
    fileType = fileType || 'xlsx'
    var wbout = XLSX.write(wb, {bookType: fileType, bookSST: false, type: 'binary'})
    fileName = fileName || '列表'
    saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), `${fileName}.${fileType}`)
}

3.使用

1.導(dǎo)出excel

這里有兩種使用方法，一種是加載為組件宵荒，一種是全局加載，我這里因?yàn)榇蟛糠猪?yè)面都需要這個(gè)導(dǎo)出功能，所以我就直接在全局加載了寺谤。

第一步：在main.js中全局掛載toExcel方法

import toExcel from '../src/js/json2excel'
Vue.prototype.$toExcel = toExcel

第二步：創(chuàng)建下載表格的方法即可

//下載表格
downExcel() {
        const th = ['文件路徑', '檢測(cè)結(jié)果', '違規(guī)原因', '關(guān)鍵詞'] //創(chuàng)建表頭
        const filterVal = ['path', 'conclusion', 'msg', 'words'] //輸出的內(nèi)容
        const data = this.dialogData.error.map(v => filterVal.map(k => v[k]))//循環(huán)添加條數(shù)
        const [fileName, fileType, sheetName] = ['違規(guī)文件檢測(cè)結(jié)果', 'xlsx', '違規(guī)文件目錄']//文件名稱，后綴吮播，文件內(nèi)的頁(yè)名
        this.$toExcel({th, data, fileName, fileType, sheetName})
 },

2.讀取excel
此方法應(yīng)該配合一個(gè)file框使用

importfxx(obj) {
        //讀取excel
        let _this = this;
        let inputDOM = this.$refs.upload;
        // 通過DOM取文件數(shù)據(jù)
        this.file = event.currentTarget.files[0];

        var rABS = false; //是否將文件讀取為二進(jìn)制字符串
        var f = this.file;

        var reader = new FileReader();
        //if (!FileReader.prototype.readAsBinaryString) {
        FileReader.prototype.readAsBinaryString = function(f) {
            var binary = "";
            var rABS = false; //是否將文件讀取為二進(jìn)制字符串
            var pt = this;
            var wb; //讀取完成的數(shù)據(jù)
            var outdata;
            var reader = new FileReader();
            reader.onload = function(e) {
                var bytes = new Uint8Array(reader.result);
                var length = bytes.byteLength;
                for (var i = 0; i < length; i++) {
                    binary += String.fromCharCode(bytes[i]);
                }
                //此處引入变屁，用于解析excel
                if (rABS) {
                    wb = XLSX.read(btoa(fixdata(binary)), {
                    //手動(dòng)轉(zhuǎn)化
                    type: "base64"
                    });
                } else {
                    wb = XLSX.read(binary, {
                    type: "binary"
                    });
                }
                //outdata = XLSX.utils.sheet_to_txt(wb.Sheets[wb.SheetNames[1]]);
                //console.log("解析的文件內(nèi)容為：" + outdata)
                outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[1]]);
                //outdata就是讀取的數(shù)據(jù)（不包含標(biāo)題行即表頭，表頭會(huì)作為對(duì)象的下標(biāo)）
                //此處可對(duì)數(shù)據(jù)進(jìn)行處理
                // let arr = [];
                // outdata.map(v => {
                //     let obj = {}
                //     obj.code = v['Code']
                //     obj.name = v['Name']
                //     obj.pro = v['province']
                //     obj.cit = v['city']
                //     obj.dis = v['district']
                //     arr.push(obj)
                // });
                // _this.da=arr;
                // _this.dalen=arr.length;
                //把結(jié)果轉(zhuǎn)為json字符串
                var jsonstr = JSON.stringify(outdata);
                console.log("解析的文件內(nèi)容為：" + jsonstr)
                //console.log(jsonstr)
                _this.text = jsonstr;
                //return arr;
            };
            reader.readAsArrayBuffer(f);
        };
        if (rABS) {
            reader.readAsArrayBuffer(f);
        } else {
            reader.readAsBinaryString(f);
        }
      }