来源 : vue-element-admin

依赖包

    npm install xlsx@0.14.1 -S
    npm install script-loader -S -D
    npm install file-saver -S

依赖JS - Export2Excel

/* 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;
}

export 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")
}

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

依赖JS - Export2Zip

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

export function export_txt_to_zip(th, jsonData, txtName, zipName) {
  const zip = new JSZip()
  const txt_name = txtName || 'file'
  const zip_name = zipName || 'file'
  const data = jsonData
  let txtData = `${th}\r\n`
  data.forEach((row) => {
    let tempStr = ''
    tempStr = row.toString()
    txtData += `${tempStr}\r\n`
  })
  zip.file(`${txt_name}.txt`, txtData)
  zip.generateAsync({
    type: "blob"
  }).then((blob) => {
    saveAs(blob, `${zip_name}.zip`)
  }, (err) => {
    alert('导出失败')
  })
}

导入组件

<template>
  <div class="upload-content">
      <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">
        <el-button  size="mini" type="success" plain icon="el-icon-upload2"  :loading="loading" @click="handleUpload">
          <slot></slot>
        </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>
.upload-content{
  display:inline-block;
  margin: 0 10px;
}
.excel-upload-input{
  display: none;
  z-index: -9999;
}
.drop{
 display:inline-block;
}
</style>

使用导入组件 - template

<UploadExcelComponent :on-success="handleSuccess" :before-upload="beforeUpload">导入</UploadExcelComponent>

回调事件 - handleSuccess

//上传后对excel数据处理解析并效验每项表格值是否符合要求
handleSuccess({results, header}) {
  // console.log(results, 'results')
  // console.log(header, 'header')
  if (results && results.length) {
    //从导入数据解析后是中文的 需要转换为对象形式
    //比如姓名 转换为 personName 是我自己写的一个switch循环传入中文返回keys
    let result = results.map(x => {
      let temp = {};
      for (let k in x) {
        let keys = this.chineseToKeys(k);
        temp[keys] = x[k];
      }
      return temp;
    })
    //从解析后的excel数据转换为存入后端需要的字典对象 从label转换为value方便存储后台
    let data = result.map(x => {
      //这一步可以对导入的excel数据进行处理...
      return x
    })
    //验证用户在excel表中，填写错误信息
    let errorLine = 0; //用于定位错误行 
    //插入数据 暂时未对每个表单项进行验证
    let allVerificationResults = data.every((x,index)=>{
    //@verificationForm这个方法是我写的具体的验证内容比如判断某个字段是否为空等等
      let flag = this.verificationForm(x); 
      if(!flag){
        errorLine = index+2; //是加上表头行 初始值是0所以还要再加1 = +2
      }
      return flag;
    })
    //如果全部通过验证 Array.every
    if(allVerificationResults){
      //则向需要传递给后端的数据中push处理好后的数据
      data.map(x => this.pbsList.push(x));
      return this.$message.success('导入成功')
    }else{
      //否则提示具体错误行
      this.$message({
        showClose: true,
        message: `导入失败,请检查Excel中 第 ${errorLine} 行 存在空数据`,
        duration:0,
        type: 'error'
      });
    }

  }
},

回调事件 - beforeUpload

//上传文件前校验
beforeUpload(file) {
  let fileType = file.name.split('.')[1];
  if(fileType&&fileType!=='xlsx'){
     this.$message.error('上传失败,上传的文件类型 必须是xlsx格式 ')
    return false
  }
  //是否小于10m 小于则通过
  const isLt10M = file.size / 1024 / 1024 < 10
  if(!isLt10M){
    this.$message.error('上传失败,上传的文件大小必须小于10M ')
    return false
  }else{
    return true
  }
},

表格数据导出成Excel方法

//导出数据 绑定到按钮上点击即可导出
handleDownload() {
  import('@/vendor/Export2Excel').then(excel => {
    const tHeader = ['姓名', '性别'] //表头名称
    //对应绑定值 例如 姓名 = personName 要对应上
    const filterVal = ['personName','sex']
    //excel - 数据字典进行处理
    const list = this.pbsList.map(x => {
      //一样是对数据进行处理...
      return x
    })
    const data = this.formatJson(filterVal, list)
    excel.export_json_to_excel({
      header: tHeader,
      data,
      filename: '人员基本情况列表',
      autoWidth: true,
      bookType: 'xlsx',
    })
    return this.$message.success('导出成功!')
  })
},

其他自己写的一些验证方法

//转JSON传入给方法
formatJson(filterVal, jsonData) {
  return jsonData.map(v => filterVal.map(j => {
    if (j === 'timestamp') {
      return processingTimestamp(v[j])
    } else {
      return v[j]
    }
  }))
},

//将导入的表格中文key转为实际需要的存储的英文key
chineseToKeys(str) {
  //获取字符对应的keys
  switch (str) {
    case '姓名':
      return 'personName';
    case '备注':
      return 'remark';
  }
},

//验证表格每项是否正确填写
verificationForm(item){
  let rules = ['appointedPost','personGender','personName','presentPost','remark','removedPost']
  //先验证所有必填项
  let everyRules = rules.every(x=>{
    return this.notNull(item[x]);
  })
  //如果所有必填项已经填 则验证是否该项是否勾选 如果为同意则继续验证
  if(everyRules){
    if(this.notNull(item.supervisionDeptOpinionSolicited)){
      if(item.supervisionDeptOpinionSolicited===true){
        return this.notNull(item.supervisionDeptOpinion)
      }else if(item.supervisionDeptOpinionSolicited===false){
        return true
      }
    }else{
      return false
    }
  }else{
    return false
  }
},

//验证传入的数据是否为空
notNull(val){
  return !(val===null ||val===undefined || (typeof val === 'string' && val.trim() === ''));
},

最后附上vue-element-admin 项目地址 和 文档地址

建议先拉一下vue-element-admin代码看一下有写好的例子，然后就很好理解了

git：gitee.com/panjiachen/…

文档： panjiachen.gitee.io/vue-element…