vue 实现导入 导出

Posted 2022-10-26 fengshaopu

导出

1. 先下载插件 xlsx ， file-saver ， script-loader

2.src目录下创建 Blob ，Export2Excel js文件

npm install xlsx            npm install file-saver          npm isntall  script-loader

3.在main.js导入

import Blob from './Excel/Blob'

import Export2Excel from './Excel/Export2Excel'

 Blob.js

/* eslint-disable */
/*  Blob.js
 * A Blob implementation.
 * 2014-05-27
 *
 * By Eli Grey, http://eligrey.com
 * By Devin Samarin, https://github.com/eboyjr
 * License: X11/MIT
 *   See LICENSE.md
 */
 
/*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
                ;
            FakeBlob.fake = FB_proto.fake = true;
            while (file_ex_code--) 
                FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
            
            if (!real_URL.createObjectURL) 
                URL = view.URL = ;
            
            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 = this.data.length = 0;
            ;
            return FakeBlobBuilder;
        (view));
  
    view.Blob = function Blob(blobParts, options) 
        var type = options ? (options.type || "") : "";
        var builder = new BlobBuilder();
        if (blobParts) 
            for (var i = 0, len = blobParts.length; i < len; i++) 
                builder.append(blobParts[i]);
            
        
        return builder.getBlob(type);
    ;
  (typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));

 Export2Excel.js

 

//Export2Excel.js
/* eslint-disable */
require('script-loader!file-saver');
require('./Blob.js');//转二进制用  这边要写你的blob的实际地址
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")
;

然后页面使用导出

   <el-button type="success" @click="click">导出</el-button>


      tableData1: [
         id: 1, title: "我是", author: 3, pageviews: 4, display_time: 5 ,
         id: 6, title: "勾搭", author: 8, pageviews: 9, display_time: 10 ,
         id: 11, title: "欧克", author: 13, pageviews: 14, display_time: 15 
      ],

      
      require.ensure([], () => 
        const  export_json_to_excel  = require("../Excel/Export2Excel"); //注意这个 
            Export2Excel路径
        const tHeader = ["序号", "昵称", "姓名"]; // 上面设置Excel的表格第一行的标题
        const filterVal = ["id", "title", "author"]; // 上面的index、nickName、name是 
            tableData里对象的属性key值
        const list = this.tableData1; //把要导出的数据tableData存到list
        const data = this.formatJson(filterVal, list);
        export_json_to_excel(tHeader, data, "导出文件名"); //最后一个是表名字
      );
    ,
    formatJson(filterVal, jsonData) 
      return jsonData.map(v => filterVal.map(j => v[j]));
    ,

 导入

<el-upload
      class="upload-demo"
      action=""
      :on-change="handleChange"
      :on-exceed="handleExceed"
      :on-remove="handleRemove"
      :file-list="fileListUpload"
      :limit="limitUpload"
      accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel"
      :auto-upload="false"
    >
      <el-button size="small" type="primary">点击上传</el-button>
      <div slot="tip" class="el-upload__tip">只 能 上 传 xlsx / xls 文 件</div>
    </el-upload>

data里面数据

  limitUpload: 1,
      tableData: [],
      column: [
        
          prop: "name",
          label: "名字"
        ,
        
          prop: "class",
          label: "分类"
        ,
        
          prop: "des",
          label: "单位"
        ,
        
          prop: "state",
          label: "状态"
        ,
        
          prop: "price",
          label: "价格"
        ,
        
          prop: "interger",
          label: "积分"
        ,
        
          prop: "pinpai",
          label: "品牌"
        ,
        
          prop: "chandi",
          label: "产地"
        ,
        
          prop: "spec",
          label: "规格"
        ,
        
          prop: "index",
          label: "排序"
        ,
        
          prop: "baozhi",
          label: "保质天数"
        ,
        
          prop: "shixiao",
          label: "失效预警"
        
      ]

methods里面

    handleChange(file, fileList) 
      this.fileTemp = file.raw;
      console.log(this.fileTemp);
      if (this.fileTemp) 
        if (
          this.fileTemp.type ==
            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" ||
          this.fileTemp.type == "application/vnd.ms-excel"
        ) 
          this.importfxx(this.fileTemp);
         else 
          this.$message(
            type: "warning",
            message: "附件格式错误，请删除后重新上传！"
          );
        
       else 
        this.$message(
          type: "warning",
          message: "请上传附件！"
        );
      
    ,

    handleRemove(file, fileList) 
      this.fileTemp = null;
    ,

    importfxx(obj) 
      console.log(obj);
    let _this = this;
    // 通过DOM取文件数据
    this.file = obj
    var rABS = false; //是否将文件读取为二进制字符串
    var f = this.file;
    var reader = new FileReader();
    //if (!FileReader.prototype.readAsBinaryString) 
    FileReader.prototype.readAsBinaryString = function(f) 
        var binary = "";
        var rABS = false; //是否将文件读取为二进制字符串
        var pt = this;
        var wb; //读取完成的数据
        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]);
        
        var XLSX = require('xlsx');
        if(rABS) 
            // wb = XLSX.read(btoa(fixdata(binary)),  //手动转化
            //     type: 'base64'
            // );
         else 
            wb = XLSX.read(binary, 
                type: 'binary'
            );
        
        outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);//outdata就是你想要的东西
            this.da = [...outdata]
            let arr = []
            this.da.map(v => 
              console.log(v);
                let obj = 
                obj.code = v['序号']
                obj.type = v['昵称'] 
                   obj.name = v['姓名']
                arr.push(obj)
            )
            console.log(arr);
            return arr
        
        reader.readAsArrayBuffer(f);
    
    
    if(rABS) 
        reader.readAsArrayBuffer(f);
     else 
        reader.readAsBinaryString(f);
    
,