需求：
点击批量导入按钮，弹出弹窗。
下载模板如图二
上传后，如果有错误，会弹出提示，如图三
点击查看失败原因，会自动下载失败的excel如图四。

请求参数和返回结果

1. vue项目导出表格功能实现步骤
npm install [email protected]
npm install [email protected]
需要的页面引入详细看src/utils/exportExcel.js

2. 页面实现

<template>
	<div>
			<el-button type="primary" @click="batchUpAndDown" size="mini">导入商品上下架</el-button>
			<up-loader ref="addUploader" @downLoad="addExcelExport" @upLoad="addExcelImport" :tip="tip" :tipRed="tipRed"></up-loader>
		    <el-dialog title="上传结果" :visible.sync="dialogUpLoaderVisible" width="300px">
		      <div style="text-align: center; margin: 20px 0;">上传失败！</div>
		      <div slot="footer" style="text-align: center">
		        <el-button type="primary" @click="handleUpLoaderDialogConfirm" size="mini">下载文件，查看失败原因</el-button>
		      </div>
		    </el-dialog>
	</div>
</template>

<script>
import exportSheet from '@/utils/exportExcel'
import * as utils from '@/utils/utils'
import UpLoader from "@/module/components/uploader/uploader.vue"
export default {
components: {
    UpLoader
  },
  data(){
		tip: '说明：批量导入商品上下架状态信息；支持.xlsx .xls格式。',
	      tipRed: '请根据下载模版编辑文件进行上传!',
	      importAddConfig: {
	        regionCode: '区域编号',
	        storeNo: '母店编号',
	        goodsNo: '商品编号',
	        shelfStatusName: '状态（上架/下架）',
	      },
	      dialogUpLoaderVisible: false,
	      importAddFailedConfig: {
	        regionCode: '区域编号',
	        storeNo: '母店编号',
	        goodsNo: '商品编号',
	        shelfStatusName: '状态（上架/下架）',
	        errMsg: '失败原因'
	      },
	      failureList: [],
	},
methods: {
	
			batchUpAndDown() {
		      this.$refs.addUploader.open()
		    },
		    // 下载模版
		    addExcelExport() {
		      console.log('new Date()', new Date())
		      console.log('utils.formatDate(new Date())', utils.formatDate(new Date()))
		      eportsheet.exportFileByConfig([{}], `菜猫商品信息批量导入${utils.formatDate(new Date())}.xlsx`, this.importAddConfig)
		    },
		    async addExcelImport(file) {
		      let parseConfig = {}
		      for (let key in this.importAddConfig) {
		        parseConfig[this.importAddConfig[key]] = key
		      }
		      await eportsheet.parseToJSON(file, parseConfig).then(result => {
		
		        if(!result){
		          this.$notify.error({ title: '提示', message:"上传文件数据解析为空" })
		          return false
		        }
		        if(result.length > 5000){
		          this.$notify.error({ title: '提示', message:"文件过大，请上传最大支持5000条数据。" })
		          return false
		        }
		        // 循环excel中的每一项
		        for(let i=0; i<result.length; i++){
		          let row = result[i]
		          if(!row.regionCode){
		            this.$notify.error({ title: '提示', message:"区域编号不能为空" })
		            return false
		          }
		          if(!row.storeNo){
		            this.$notify.error({ title: '提示', message:"母店编号不能为空" })
		            return false
		          }
		          if(!row.goodsNo){
		            this.$notify.error({ title: '提示', message:"商品编号不能为空" })
		            return false
		          }
		          if(!row.shelfStatusName){
		            this.$notify.error({ title: '提示', message:"上下架状态不能为空" })
		            return false
		          }
		        }
		        // 将excel的数据转成数组后传给后端，后端返回操作结果的文件流
		        this.$http.post(requestUrl.buyer.batchImportShelfStatus, result).then(res => {
		          if (res.code === 0) {
		            this.$refs.addUploader.close()
		            if (res.data.length == 0) {
		              this.$notify.success({title: '操作提示',message: "导入成功"})
		              this.doSearchHandle()
		            } else {
		              this.dialogUpLoaderVisible = true
		              this.failureList = res.data
		              return
		            }
		            // this.exportLoading = false
		          } else {
		            this.$notify.error({
		              title: '提示',
		              message: res.msg
		            })
		          }
		        })
		      })
		    },
		    handleUpLoaderDialogConfirm() {
		      let exportedData = this.failureList
		      try {
		        const tHeader = utils.objectToArray(this.importAddFailedConfig, false)
		        const filterVal = utils.objectToArray(this.importAddFailedConfig, true)
		        exportSheet.ExportJsonToExcel({
		          header: tHeader,
		          filterVal,
		          data: exportedData,
		          filename: '商品信息批量导入结果'
		        })
		        this.dialogUpLoaderVisible = false
		      } catch (exception) {
		        this.loading = false
		        this.$notify.error({
		          title: '温馨提示',
		          message: '导出遇到错误'
		        })
		      }
		    },
		
	}
}

</script>

@/module/components/uploader/uploader.vue

<template>
  <!--批量导入弹窗-->
  <el-dialog :visible.sync="visible" size="large" title="批量导入" :loading="loadingInfo">
    <el-row class="mv10">
      <el-col :span="24">
        <label :for="`excelFile${tmp}`" class="excelFileLabel">
          <span class="file-label-text">请选择文件</span>
          <input accept=".xlm,.xls,.xlt,.xlw,.xlsx" type="file" :id="`excelFile${tmp}`" hidden @change="handleFileSelect" :value="fileValue" />
          <el-input class="search-input" v-model="file.name" disabled></el-input>
        </label>
        <el-button style="margin-left: 10px" size="small" type="text" @click="exportTemp">下载模版</el-button>
      </el-col>
      <el-col v-if="tip || tipRed">
        <div class="tipBox">{{tip}}<span class="tipRed">{{tipRed}}</span></div>
      </el-col>
    </el-row>
    <el-row>
      <el-col :span="24">
        <el-button style="margin-top: 20px" :loading="loadingInfo" size="small" type="primary" @click="submitUpload">导入
        </el-button>
        <el-button @click="exportErrorFile" v-if="upStatus.code">下载错误列表</el-button>
      </el-col>
    </el-row>
    <el-row class="mt20" v-if="upStatus.code">
      <el-col :span="24" style="color:red">
        <p>{{file.name}} 导入失败，请修改后重新上传</p>
        <p>失败原因：{{upStatus.msg}}</p>
      </el-col>
    </el-row>
  </el-dialog>
</template>
<script>

export default {
  name: 'upLoader',
  props: {
    loadingInfo: { type: Boolean, default: false },
    tip: { type: String, default: '' },
    tipRed: { type: String, default: '' },
  },
  data () {
    return {
      tmp: Date.now(),
      visible: false,
      fileValue: '',
      loading: false,
      file: { name: '' },
      upStatus: {
        code: '',
        msg: '',
        data: []
      },
      tempConfig: {}
    }
  },
  methods: {
    handleFileSelect (e) {
      this.file = e.target.files[0] || { name: '' }
      console.log(e.target.files)
      console.log(this.file)
      // 如果文件改变需要初始化上传状态
      this.upStatus = { code: '', msg: '', data: [] }
    },
    exportTemp () {
      try {
        // let item = {}
        // Object.keys(this.tempConfig).forEach(v => {
        //   item[v] = ''
        // })
        // exportsheet.exportFileByConfig([item], '配送中心盘点.xlsx', this.tempConfig)
        // this.$notify.success({
        //   title: '提示',
        //   message: '下载模块成功'
        // })
        this.$emit('downLoad')
      } catch (e) {
        this.$notify.error({
          title: '提示',
          message: '模板下载遇到错误'
        })
      }
    },
    submitUpload () {
      if (!this.file.name || this.file.name.indexOf(".xl") === -1) {
        this.$notify.warning({
          title: '提示',
          message: '请选择excel文件'
        })
        return
      }
      this.$emit('upLoad', this.file)
      // let items = []
      // let parseConfig = {}
      // for (let key in this.tempConfig) {
      //   parseConfig[this.tempConfig[key]] = key
      // }
      // this.loading = true
      // try {
      //   items = await exportsheet.parseToJSON(this.file, parseConfig)
      //   // 过滤空行
      //   items = items.filter(item => !!item.LocatorNO)
      //   api.post('/api/CheckInventory/CheckLovInvImport', items, true)
      //     .then(res => {
      //       this.loading = false
      //       if (res.code === 0) {
      //         this.$notify.success({
      //           title: '提示',
      //           message: '导入成功'
      //         })
      //         this.$emit('success', res.data)
      //         this.upStatus.code = 0
      //         this.visible = false
      //       } else {
      //         this.upStatus = {...res}
      //       }
      //     })
      //     .catch(e => {
      //       this.loading = false
      //       this.$notify.error({
      //         title: '提示',
      //         message: e.message
      //       })
      //     })
      // } catch (e) {
      //   this.loading = false
      //   this.$notify.error({
      //     title: '提示',
      //     message: e.message
      //   })
      // }
    },
    open () {
      this.visible = true
      this.fileValue = ''
      this.file = { name: '' }
    },
    close () {
      this.visible = false
    }
  }
}
</script>
<style scoped>
.file-label-text {
  cursor: pointer;
  color: #409eff;
}
.tipBox {
  margin: 10px 0;
}
.tipRed {
  color: red;
}
</style>

/src/utils/utils.js

/**
 * @description: 将对象的key转化成数组
 * @param {type} byeKey true 将key转化成数组   false将key对应的值转化成数组
 * @return:
 */
export function objectToArray(obj, byeKey) {
  let arrList = []
  for(let key in obj) {
    if(byeKey) {
      arrList.push(key)
    }else {
      arrList.push(obj[key])
    }
  }
  return arrList
}

src/utils/exportExcel.js

/* eslint-disable */
import { saveAs } from 'file-saver'
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;
}

/**
 * @description: 格式化要导出的数据
 * @param {type} 
 * @return: 
 */
function formatJson(filterVal, jsonData) {
  return jsonData.map(v => filterVal.map(j => {
    if (j === 'timestamp') {
      return parseTime(v[j])
    } else {
      return v[j]
    }
  }))
}

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")
}

function export_json_to_excel({
  multiHeader = [],
  header,
  filterVal,
  data,
  filename,
  merges = [],
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  filename = filename || 'excel-list'
  data = formatJson(filterVal, data)
  data.unshift(header);

  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }

  var ws_name = "SheetJS";
  var wb = new Workbook(),
      ws = sheet_from_array_of_arrays(data);

  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = [];
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }

  if (autoWidth) {
    /*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: bookType,
    bookSST: false,
    type: 'binary'
  });
  saveAs(new Blob([s2ab(wbout)], {
    type: "application/octet-stream"
  }), `${filename}.${bookType}`);
}

/*
 *  @excelFile File
 *  @config Object 解析字段
 *  @setter Object XLSX.utils.sheet_to_json的配置
*/
function parseToJSON (excelFile, config, setter = {}) {
  return new Promise((resolve, reject) => {
    if (window.FileReader) {
      let result = []
      let fr = new FileReader()
      fr.readAsBinaryString(excelFile)
      fr.onload = ev => {
        try {
          let data = ev.target.result
          // 以二进制形式读取excel文件
          let workbook = XLSX.read(data, {
            type: 'binary'
          })
          // 只遍历第一个表
          let name = workbook.SheetNames[0]
          let sheet = workbook.Sheets[name]
          if (sheet) {
            result = XLSX.utils.sheet_to_json(sheet, {defval: '', ...setter})
            if (config) {
              result.forEach(item => {
                for (let key in item) {
                  if (config[key]) {
                    item[config[key]] = item[key]
                    if(config[key] !== key) {
                      delete item[key]
                    }
                  }
                }
              })
            }
          }
          resolve(result)
        } catch (e) {
          reject(new Error("文件类型不正确"))
        }
      }
      return
    }
    reject(new Error("该浏览器不支持该功能，请更换或升级浏览器"))
  })
}


export default {
  export_table_to_excel,
  ExportJsonToExcel: export_json_to_excel,
  parseToJSON
}