vue中前端导出excel的两种方法

vue中前端导出excel方法

其实前端导出和后端导出的处理方式很类似 我们这样主要是根据后端接口返回的不分页的列表来进行整体导出功能的实现

依赖文件 可以直接cv到项目中

utils下的 Export2Excel.js文件

require('script-loader!file-saver');
require('script-loader!xlsx/dist/xlsx.core.min');
const {blob} = require('./Blob')

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")
}

同级别的Blob.js文件 也可以直接cv到项目中都是依赖文件

const blob = 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);
    };
}
exports.blob = blob;

然后自己创建个方法这里是老项目直接挂载到了vue原型链上

    // 前端导出
    // 数据 表头 接口字段 文件名称
    Vue.prototype.getExcel = function (res, head, file, fileName = "表单数据") {
        require.ensure([], () => {
            const {
                export_json_to_excel
            } = require('./utils/Export2Excel.js')
            const tHeader = head
            const filterVal = file
            const list = res
            const data = list.map(v => filterVal.map(j => v[j]))
            export_json_to_excel(tHeader, data, fileName)
        })
    };

在页面中如何使用

    //导出
    async function exportEvent() {
    //element loading组件封装
      startLoading();
      let head, file, fileName;
      //这个为表头 基本和你展示的列表一摸一样
      head = ['市场属性', '市场名称', '全部订单', '全部退款', '部分退款', '合计退款订单', '退款率'];
      //这个为列表对应的后端字段数据
      file = ['market_type', 'market_name', 'pay_num', 'refund_all_num', 'refund_part_num', 'refund_num', 'refund_rate'];
      //这个为下载的列表名称
      fileName = '退款分析导出列表';
      //接口搜索参数(可有可无) 我这里需要
      const params = {
        ...search.value,
        need_page: 0,
        start_date: search.value.date ? search.value.date[0] : '',
        end_date: search.value.date ? search.value.date[1] : '',
      };
      delete params.date;
      let data;
      try {
        const { data: resData } = await getList(params);
        data = resData;
      } catch (error) {
        throw new Error('导出失败');
      } finally {
      	// 调用vue原型链上的getExcel方法 
      	// vue3 直接可以引入function进传参调用
        proxy.getExcel(data.data.data, head, file, fileName);
        Message.success('导出成功');
        //element loading组件结束
        endLoading();
      }
    }

第二种方法导出excel的方法 使用插件 file-saver 和 xlsx

我们需要先下载一个 xlsx 和 file-saver

npm install --save xlsx file-saver

然后我们还是在uitls文件下创建一个 exportTbale.js 文件

//引入插件
import FileSaver from 'file-saver'
import * as XLSX from 'xlsx'
//写入方法
export const exportExcel2 = async (id, name) => {
  // 这里的outTable是需要导出的表格,选择对应id
  let vb = XLSX.utils.table_to_book(document.getElementById(id));
  let vbout = XLSX.write(vb, { bookType: 'xlsx', bookSST: true, type: 'array' });
  try {
    FileSaver.saveAs(new Blob([vbout], { type: 'application/octet-stream' }), name + '.xlsx');
  } catch (e) {
    if (typeof console !== 'undefined') console.log(e, vbout);
  }
  return vbout;
}

组件中使用

<el-table
  :data="tableData"
  class="table"
  id="outTable" 
>
  <el-table-column prop="source" label="平台" align="center">
    <template slot-scope="scope">
      <span>****span>
    template>
  el-table-column>
el-table>

import { exportExcel2 } from "@/utils/exportTbale";
    // 导出
exportExcelTable () {
  setTimeout(() => {
  //这里的前提是不分页的情况下 如果有单独不分页的接口 需要重新给 tableData 赋值然后再进行调用exportExcel2
  
  	// ps: tableData.value = res.data.data - (这里为不分页的接口数据)
  	//不然会导致只有前面10条的数据
  	
  	//这里的第一个参数为el-table的id 第二个为excel的名称
    exportExcel2('outTable', '**表')
  }, 500)
},

希望此文章能帮助到您,一键三连 谢谢支持