一、页面表格导入功能

我们借鉴vue-element-admin文件来学习表格导入功能,如果你有vue-element-admin的完整文件，可以去这里找

or 用我这里的代码

1. 整体复制到你要用到的页面

<template>
  <div class="app-container">
    <upload-excel-component :on-success="handleSuccess" :before-upload="beforeUpload" />
    <el-table :data="tableData" border highlight-current-row style="width: 100%;margin-top:20px;">
      <el-table-column v-for="item of tableHeader" :key="item" :prop="item" :label="item" />
    </el-table>
  </div>
</template>

<script>
import UploadExcelComponent from '@/components/UploadExcel/index.vue'

export default {
  name: 'UploadExcel',
  components: { UploadExcelComponent },
  data() {
    return {
      tableData: [],
      tableHeader: []
    }
  },
  methods: {
    beforeUpload(file) {
      const isLt1M = file.size / 1024 / 1024 < 1

      if (isLt1M) {
        return true
      }

      this.$message({
        message: 'Please do not upload files larger than 1m in size.',
        type: 'warning'
      })
      return false
    },
    handleSuccess({ results, header }) {
      this.tableData = results
      this.tableHeader = header
    }
  }
}
</script>

然后 ----注意导入文件!

• 将vue-element-admin中的src/components/UploadExcel 文件拖入到自己项目中,存放在相同位置,如果修改位置记得在导入的地方修改路径
  

• or 复制这里的文件到src/components/UploadExcel/index.vue

<template>
  <div>
    <input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="handleClick">
    <div class="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
      Drop excel file here or
      <el-button :loading="loading" style="margin-left:16px;" size="mini" type="primary" @click="handleUpload">
        Browse
      </el-button>
    </div>
  </div>
</template>

<script>
import XLSX from 'xlsx'

export default {
  props: {
    beforeUpload: Function, // eslint-disable-line
    onSuccess: Function// eslint-disable-line
  },
  data() {
    return {
      loading: false,
      excelData: {
        header: null,
        results: null
      }
    }
  },
  methods: {
    generateData({ header, results }) {
      this.excelData.header = header
      this.excelData.results = results
      this.onSuccess && this.onSuccess(this.excelData)
    },
    handleDrop(e) {
      e.stopPropagation()
      e.preventDefault()
      if (this.loading) return
      const files = e.dataTransfer.files
      if (files.length !== 1) {
        this.$message.error('Only support uploading one file!')
        return
      }
      const rawFile = files[0] // only use files[0]

      if (!this.isExcel(rawFile)) {
        this.$message.error('Only supports upload .xlsx, .xls, .csv suffix files')
        return false
      }
      this.upload(rawFile)
      e.stopPropagation()
      e.preventDefault()
    },
    handleDragover(e) {
      e.stopPropagation()
      e.preventDefault()
      e.dataTransfer.dropEffect = 'copy'
    },
    handleUpload() {
      this.$refs['excel-upload-input'].click()
    },
    handleClick(e) {
      const files = e.target.files
      const rawFile = files[0] // only use files[0]
      if (!rawFile) return
      this.upload(rawFile)
    },
    upload(rawFile) {
      this.$refs['excel-upload-input'].value = null // fix can't select the same excel

      if (!this.beforeUpload) {
        this.readerData(rawFile)
        return
      }
      const before = this.beforeUpload(rawFile)
      if (before) {
        this.readerData(rawFile)
      }
    },
    readerData(rawFile) {
      this.loading = true
      return new Promise((resolve, reject) => {
        const reader = new FileReader()
        reader.onload = e => {
          const data = e.target.result
          const workbook = XLSX.read(data, { type: 'array' })
          const firstSheetName = workbook.SheetNames[0]
          const worksheet = workbook.Sheets[firstSheetName]
          const header = this.getHeaderRow(worksheet)
          const results = XLSX.utils.sheet_to_json(worksheet)
          this.generateData({ header, results })
          this.loading = false
          resolve()
        }
        reader.readAsArrayBuffer(rawFile)
      })
    },
    getHeaderRow(sheet) {
      const headers = []
      const range = XLSX.utils.decode_range(sheet['!ref'])
      let C
      const R = range.s.r
      /* start in the first row */
      for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
        const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })]
        /* find the cell in the first row */
        let hdr = 'UNKNOWN ' + C // <-- replace with your desired default
        if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
        headers.push(hdr)
      }
      return headers
    },
    isExcel(file) {
      return /\.(xlsx|xls|csv)$/.test(file.name)
    }
  }
}
</script>

<style scoped>
.excel-upload-input{
  display: none;
  z-index: -9999;
}
.drop{
  border: 2px dashed #bbb;
  width: 600px;
  height: 160px;
  line-height: 160px;
  margin: 0 auto;
  font-size: 24px;
  border-radius: 5px;
  text-align: center;
  color: #bbb;
  position: relative;
}
</style>

2. 下载xlsx文件

由于admin中的xlsx版本不一样,我们需要下载它的版本,在package.json可以看到版本

我们直接复制到自己项目中的package.json相同位置

 "xlsx": "0.14.1"

然后在控制台下载依赖

npm  i

3. 重启服务器,测试是否能上传Excel,正确效果如下

二、表格导入格式转换

原本格式:

转化后格式:

转换函数:

// 表格数据转换函数
export function transformData(result) {
  const mapInfo = {
    '入职日期': 'timeOfEntry',
    '手机号': 'mobile',
    '姓名': 'username',
    '转正日期': 'correctionTime',
    '工号': 'workNumber',
    '部门': 'departmentName',
    '聘用形式': 'formOfEmployment'
  }
  return result.map(item => {
    const zhKeys = Object.keys(item)
    const obj = {}
    zhKeys.forEach(zhKey => {
      const enKey = mapInfo[zhKey]
      if (enKey === 'timeOfEntry' || enKey === 'correctionTime') {
        obj[enKey] = formatExcelDate(item[zhKey])
      } else {
        obj[enKey] = item[zhKey]
      }
    })
    return obj
  })
}
// 转换表格时间为2021/1/2格式
export function formatExcelDate(numb, format = '/') {
  const time = new Date((numb - 25567) * 24 * 3600000 - 5 * 60 * 1000 - 43 * 1000 - 24 * 3600000 - 8 * 3600000)
  time.setYear(time.getFullYear())
  const year = time.getFullYear() + ''
  const month = time.getMonth() + 1 + ''
  const date = time.getDate() + ''
  if (format && format.length === 1) {
    return year + format + month + format + date
  }
  return year + (month < 10 ? '0' + month : month) + (date < 10 ? '0' + date : date)
}

使用函数转换:

 handleSuccess({ results, header }) {
      console.log(results, header)//表格的初始数据
      this.tableData = results
      this.tableHeader = header
      const data = transformData(results)//调用函数转换格式
      console.log(data)//最终得到图2效果---因为后台需要这样的数据
    }

如果需要转换为标准格式可以用new Date():(18行)

// 表格数据转换函数
export function transformData(result) {
  const mapInfo = {
    '入职日期': 'timeOfEntry',
    '手机号': 'mobile',
    '姓名': 'username',
    '转正日期': 'correctionTime',
    '工号': 'workNumber',
    '部门': 'departmentName',
    '聘用形式': 'formOfEmployment'
  }
  return result.map(item => {
    const zhKeys = Object.keys(item)
    const obj = {}
    zhKeys.forEach(zhKey => {
      const enKey = mapInfo[zhKey]
      if (enKey === 'timeOfEntry' || enKey === 'correctionTime') {
        obj[enKey] = new Date(formatExcelDate(item[zhKey]))
      } else {
        obj[enKey] = item[zhKey]
      }
    })
    return obj
  })
}
// 转换表格时间为2021/1/2格式
// 把excel文件中的日期格式的内容转回成标准时间
export function formatExcelDate(numb, format = '/') {
  const time = new Date((numb - 25567) * 24 * 3600000 - 5 * 60 * 1000 - 43 * 1000 - 24 * 3600000 - 8 * 3600000)
  time.setYear(time.getFullYear())
  const year = time.getFullYear() + ''
  const month = time.getMonth() + 1 + ''
  const date = time.getDate() + ''
  if (format && format.length === 1) {
    return year + format + month + format + date
  }
  return year + (month < 10 ? '0' + month : month) + (date < 10 ? '0' + date : date)
}

---

现在是2022年12.31号晚上23：37分，马上又是充满希望的一年~
加油加油！ O(∩_∩)O