前端使用xlsx file-saver xlsx-style导出

import FileSaver from 'file-saver'

import XLSXStyle from "xlsx-style";

import XLSX from 'xlsx'

 vue 2.0版本xlsx-style ./cptable' 报错:Can't resolve './cptable' in 'xxxx\nautical-front\node_modules_xlsx 

 解决办法

1根据脚手架版本不同可以在 webpack.base.conf.js 中写

module.exports = {
    externals: [ {
         './cptable': 'var cptable' 
    }]
}

也可以在vue.config.js中写

module.exports = {
    chainWebpack: config => {
        config.externals({ './cptable': 'var cptable' })
    }
}
问题所在：\node_modules\xlsx-style\dist\cpexcel.js 807行   var cpt = require('./cpt' + 'able');
修改为  var cpt = cptable  修改的只是本地文件
不推荐这种方式，因为你只是修改了自己的本地文件呢，下一次其他人进行打包或运行项目一样会报这类错误

setExlStyle(data) {

      let borderAll = {  //单元格外侧框线

        // top: {

        //   style: 'thin',

        // },

        // bottom: {

        //   style: 'thin'

        // },

        // left: {

        //   style: 'thin'

        // },

        // right: {

        //   style: 'thin'

        // }

      };

      data['!cols'] = [];

      for (let key in data) {

        // console.log(key)

        if (data[key] instanceof Object) {

          data[key].s = {

            border: borderAll,

            alignment: {

              horizontal: 'center',   //水平居中对齐

              vertical:'center'

            },

            font:{

              sz:11

            },

            bold:true,

            numFmt: 0

          }

          data['!cols'].push({wpx: 160});

        }

      }

      return data;

    },

    addRangeBorder (range, ws) {

      console.log(range)

      let cols = ["A", "B", "C", "D", "E"];

      range.forEach(item => {

        console.log(item)

        let style = {

          // s: {

          //   border: {

          //     top: { style: 'thin' },

          //     left: { style: 'thin' },

          //     bottom: { style: 'thin' },

          //     right: { style: 'thin' }

          //   }

          // }

        }

        // 处理合并行

        for (let i = item.s.c; i <= item.e.c; i++) {

          ws[`${cols[i]}${Number(item.e.r) + 1}`] = ws[`${cols[i]}${Number(item.e.r) + 1}`] || style

          // 处理合并列

          for (let k = item.s.r + 2; k <= item.e.r + 1; k++) {

            ws[cols[i] + k] = ws[cols[k] + item.e.r] || style

          }

        }

      })

      return ws;

    },

      exportExcel(){

        let ws = XLSX.utils.table_to_sheet(this.$refs['report-table'].$el)

      //创建一个workbook对象

      let wb = XLSX.utils.book_new()

      //把worksheet对象添加进workbook对象，第三个参数是excel中sheet的名字

      XLSX.utils.book_append_sheet(wb, ws, '列表')

      this.setExlStyle(wb['Sheets']['列表']); // 设置列宽 字号等 如果无需多余的样式则省略

      this.addRangeBorder(wb['Sheets']['列表']['!merges'],wb['Sheets']['列表']) //设置合并行的border

      let wb_out = XLSXStyle.write(wb, { type: 'buffer'})

      try {

        FileSaver.saveAs(new Blob([wb_out], {

          type: 'application/octet-stream'

        }), '用时用工统计表.xlsx');   // 导出的文件名

      } catch (e) {

        console.log(e, wb_out) ;

      }

      return wb_out;

      },

       rowspan(spanArr, position, spanName) {

      this.list.forEach((item, index) => {

        if (index === 0) {

          spanArr.push(1);

          position = 0;

        } else {

          if (

            this.list[index][spanName] ===

            this.list[index - 1][spanName]

          ) {

            spanArr[position] += 1;

            spanArr.push(0);

          } else {

            spanArr.push(1);

            position = index;

          }

        }

      });

    },

      objectSpanMethod({ row, column, rowIndex, columnIndex }) {  

          if (columnIndex === 0) {

              const _row = this.testArr0[rowIndex];

              const _col = _row > 0 ? 1 : 0;

              return {

                rowspan: _row,

                colspan: _col,

              };

          }

          if (columnIndex === 1) {

              const _row = this.testArr1[rowIndex];

              const _col = _row > 0 ? 1 : 0;

              return {

                rowspan: _row,

                colspan: _col,

              };

          }

          if (columnIndex === 2) {

              const _row = this.testArr2[rowIndex];

              const _col = _row > 0 ? 1 : 0;

              return {

                rowspan: _row,

                colspan: _col,

              };

          }

          if (columnIndex ===3) {

              const _row = this.testArr3[rowIndex];

              const _col = _row > 0 ? 1 : 0;

              return {

                rowspan: _row,

                colspan: _col,

              };

          }

      },

this.rowspan(this.testArr3, this.testPosition3, "num");

对应的表格

<el-table :data="list" fit border stripe

                  highlight-current-row

                  ref="report-table"

                  :span-method="objectSpanMethod"

                  @selection-change="handleSelectionChange"

                  height="100%">

 

对应导出列表