在 vue-cli 项目中在前端导出 excel 表格数据

1\ 通过 post 接口请求

methods: {
  excelExport() {
      let qinfo = {
        data: ""
      };
      let url = "/ip";   // 接口地址
      this.$axios
        .post(url, qinfo, {
          headers: {
            "Content-Type": "application/json;charset=UTF-8"
          },
          responseType: "blob" //二进制流,
        })
        .then(function(res) {
          if (!res) return;
          let blob = new Blob([res.data], {
            type: "application/vnd.ms-excel;charset=utf-8"
          });

          let url = window.URL.createObjectURL(blob);
          let aLink = document.createElement("a");
          aLink.style.display = "none";
          aLink.href = url;
          aLink.setAttribute("download", "导出测试.xls");
          document.body.appendChild(aLink);
          aLink.click();
          document.body.removeChild(aLink);
          window.URL.revokeObjectURL(url);
        })
        .catch(function(error) {
          this.$message.error(error);
        });
    }
}

2\ 通过前端 js 代码

methods: {
// 数据导出
    enterBtnClick() {
      if (this.pqListDataSum.length > 0) {
        this.export2Excel();
      } else {
        this.$message.info("暂无可下载数据！");
      }
    },
    // 导出excel 调用方法
    formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]));
    },
    export2Excel() {
      let that = this;
      require.ensure([], () => {
        const { export_json_to_excel } = require("../../vendor/Export2Excel");
        const tHeader = [
          "类型",
          "车牌号",
          "通行介质",          
          "车型",
          "总重(吨)",
          "金额(元)"
        ];
        const filterVal = [
          "mode",
          "cardid",
          "mediatype",          
          "vclass",
          "totalWeight",
          "totalToll"
        ];
        const data = this.formatJson(filterVal, this.pqListDataSum);
        export_json_to_excel(
          tHeader,
          data,
          "excel列表数据"
        );
      });
    }
}

Blob.js 参考下载地址：https://github.com/eligrey/Blob.js
require("…/…/vendor/Export2Excel") 的 Export2Excel.js 代码如下，其中目录结构：

/* Export2Excel.js */
/* eslint-disable */
require('script-loader!file-saver');
require('script-loader!@/vendor/Blob');
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")
}