前端导入导出excel表方法

安装

npm install xlsx

< script lang="javascript" src="dist/xlsx.full.min.js"></script>

github地址https://github.com/SheetJS/sheetjs

<template>
  <div @drop="_drop" @dragenter="_suppress" @dragover="_suppress" class="sheet-upload">
    <div class="row">
      <div class="col-xs-12">
        <form class="form-inline">
          <div class="form-group">
            <Upload
              multiple
              type="drag"
              :disabled="isDisabledUpload"
              :before-upload="beforeUpload"
              action="/"
            >
              <slot></slot>
            </Upload>
          </div>
        </form>
      </div>
    </div>
  </div>
</template>

<script>
import XLSX from 'xlsx'
const make_cols = refstr =>
  Array(XLSX.utils.decode_range(refstr).e.c + 1)
    .fill(0)
    .map((x, i) => ({ name: XLSX.utils.encode_col(i), key: i }))
const _SheetJSFT = ['xlsx', 'csv']
  .map(function(x) {
    return '.' + x
  })
  .join(',')
export default {
  props: {
    isDisabled: {
      type: Boolean,
      default: function() {
        return false
      }
    }
  },
  data() {
    return {
      data: [],
      cols: [
        { name: 'A', key: 0 },
        { name: 'B', key: 1 },
        { name: 'C', key: 2 },
        { name: 'D', key: 3 },
        { name: 'E', key: 4 },
        { name: 'F', key: 5 },
        { name: 'G', key: 6 }
      ],
      SheetJSFT: _SheetJSFT,
      isDisabledUpload: true
    }
  },
  watch: {
    isDisabled: {
      handler(newId, oldId) {
        this.isDisabledUpload = newId
      },
      immediate: true
    }
  },
  methods: {
    beforeUpload(file) {
      this._file(file)
      return false
    },
    uploadHandler() {
      this.$refs.FileInput.click()
    },
    _suppress(evt) {
      evt.stopPropagation()
      evt.preventDefault()
    },
    _drop(evt) {
      evt.stopPropagation()
      evt.preventDefault()
      const files = evt.dataTransfer.files
      if (files && files[0]) this._file(files[0])
    },
    _change(evt) {
      const files = evt.target.files
      if (files && files[0]) this._file(files[0])
    },
    _export(evt) {
      /* convert state to workbook */
      const ws = XLSX.utils.json_to_sheet(this.data)
      const wb = XLSX.utils.book_new()
      XLSX.utils.book_append_sheet(wb, ws, 'SheetJS')
      /* generate file and send to client */
      XLSX.writeFile(wb, 'sheetjs.xlsx')
    },
    _file(file) {
      /* Boilerplate to set up FileReader */
      const reader = new FileReader()
      reader.onload = e => {
        /* Parse data */
        const bstr = e.target.result
        const wb = XLSX.read(bstr, { type: 'binary' })
        /* Get first worksheet */
        const wsname = wb.SheetNames[0]
        const ws = wb.Sheets[wsname]
        /* Convert array of arrays */
        const data = XLSX.utils.sheet_to_json(ws)
        // let sheetData = []
        // data.forEach(item => {
        //   if (item.length > 0) {
        //     sheetData.push(item)
        //   }
        // })
        this.data = data
        this.cols = make_cols(ws['!ref'])
        this.$emit('on-success', data)
      }
      reader.readAsBinaryString(file)
    }
  },
  created() {
    this.isDisabledUpload = this.isDisabled
  }
}
</script>
<style lang="less" scoped>
.sheet-upload {
  .form-control {
    display: none;
  }
}
</style>