vue js Excel的导入导出

vue js导入导出

引入工具

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

修改配置文件 webpack.base.conf.js

 resolve: {
    
    
    extensions: ['.js', '.vue', '.json'],
    alias: {
    
    
      'vue$': 'vue/dist/vue.esm.js', //添加此列
      '@': resolve('src'),
    }
  },

导入

添加一个隐藏的input

 <el-button type="primary"
                       plain
                       @click="importBtn">导入</el-button>

 <input id="uploadInput"
                   type="file"
                   ref="uploadExcel"
                   hidden
                   @change="importf"
                   accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />

  importBtn () {
    
      //按钮点击事件。调用input点击触发上传事件
      this.$refs.uploadExcel.click();
    },
    //导入
    importf (e) {
    
    
      let _this = this;
      var files = e.target.files;
      if (files.length <= 0) {
    
    
        return false;
      }
      var rABS = false; //是否将文件读取为二进制字符串
      var f = files[0];
      var reader = new FileReader();
      var outdata;
      try {
    
    
        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 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就是你想要的东西 excel导入的数据
            outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
            //处理得到的结果
            _this.dealImportData(outdata)
			//重置input的值，防止第一次点击之后，点击无反应问题
            document.getElementById("uploadInput").value = "";
          }
          reader.readAsArrayBuffer(f);
        }
        if (rABS) {
    
    
          reader.readAsArrayBuffer(f);
        } else {
    
    
          reader.readAsBinaryString(f);
        }
      } catch (error) {
    
    
        alert("导入失败");
      }
  },
  //处理得到的结果
  dealImportData(outdata){
    
    
    var arr = [];
    outdata.map(v => {
    
    
	var obj ={
    
    };
		obj.你的字段 = v.Excel表中的列名
		......
	}
}

导出

在自己的工具类下创建vendor文件夹

添加这两个文件

Blob.js文件内容

(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文件内容

/* eslint-disable */
// require('script-loader!file-saver');
// require('script-loader!@/vendor/Blob');
require('script-loader!file-saver');
require('./Blob');
require('script-loader!xlsx/dist/xlsx.core.min');
import XLSX from 'xlsx'

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);
    var oo = generateArray(theTable);
    var ranges = oo[1];

    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";

    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")
}
//导出
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);

    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row => row.map(val => {
    
    
        /*先判断是否为null/undefined*/
        if (val == null) {
    
    
            return {
    
     'wch': 10 };
        }
        /*再判断是否为中文*/
        else if (val.toString().charCodeAt(0) > 255) {
    
    
            return {
    
     'wch': val.toString().length * 2 };
        } else {
    
    
            return {
    
     'wch': val.toString().length };
        }
    }))
    /*以第一行为初始值*/
    let result = colWidth[0];
    for (let i = 1; i < colWidth.length; i++) {
    
    
        for (let j = 0; j < colWidth[i].length; j++) {
    
    
            if (result[j]['wch'] < colWidth[i][j]['wch']) {
    
    
                result[j]['wch'] = colWidth[i][j]['wch'];
            }
        }
    }
    ws['!cols'] = result;

    /* 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 || 'excel-list'
    saveAs(new Blob([s2ab(wbout)], {
    
     type: "application/octet-stream" }), title + ".xlsx")
}

创建exportExcel.js 封装导出调用方法

exportExcel.js

import Vue from 'vue'
/**
 * 
 * @param {*} tHeader 表格头
 * @param {*} filterVal 数据key
 * @param {*} list 数据源
 * @param {*} excelName 表格名称
 */
Vue.prototype.exportExcel = function exportExcel (tHeader, filterVal, list, excelName) {
    
    
    require.ensure([], () => {
    
    
        const {
    
     export_json_to_excel } = require('@/utils/vendor/Export2Excel');
        // let tHeader = []
        // let filterVal = []
        // columns.forEach(item => {
    
    
        //     tHeader.push(item.title)
        //     filterVal.push(item.key)
        // })
        const data = list.map(v => filterVal.map(j => v[j]))
        export_json_to_excel(tHeader, data, excelName);
    })
}

在main.js中引用此文件

import "./utils/exportExcel";

具体程序中调用

      var tHeader = ['列名1', '列名2']; //表格列的列头
      var filterVal = ['name1','name2'];  //需要导出的表格数据中的字段名
      var excelName = this.normalTime5(new Date()); //导出的文件名，自己随便定义
      //list 为需要导出表格的数据源
      this.exportExcel(tHeader, filterVal, list, excelName);//调用导出方法