vue element-ui项目将table导出Excel

第一步:安装三个依赖包

npm install --save xlsx
npm install --save file-saver
npm install --save-dev script-loader
前两个是插件依赖,最后一个是webpack打包报错的解决方案

第二步:写入导出的工具函数

在vue-cli项目下的src文件夹下新建vendor文件夹,里面写入的Export2Excel.js文件,内容

/* eslint-disable */
require('script-loader!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}`);
}

第三步:在需要使用导出的页面组件中调用。

示例如下:

<template>
  <div class="table-to-excel">
    <h3 class="uuid">表格转换Excel</h3>
    <el-button class="button" @click="handleDownToExcel">导出Excel</el-button>
    <el-table :data="tableData" border style="width: 100%">
      <el-table-column prop="date" label="日期" width="180"></el-table-column>
      <el-table-column prop="name" label="姓名" width="180"></el-table-column>
      <el-table-column prop="address" label="地址"></el-table-column>
    </el-table>
  </div>
</template>
 
<script>
export default {
  data() {
    return {
      tableData: [
        {
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }
      ]
    }
  },
  created() {},
  methods: {
    handleDownToExcel() {
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['日期', '姓名', '地址'] // 表头
        const filterVal = ['date', 'name', 'address'] // 与表头对应的字段
        const list = this.tableData
        const data = this.formatJson(filterVal, list)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: '测试表格Excel' // 导出Excel的名字
        })
      })
    },
    formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]))
    }
  }
}
</script>
<style lang="scss" scoped>
.table-to-excel {
  padding: 20px;
}
</style>

导出的其他配置,查看工具函数内的参数配置项。

关于导出多级表头和树形数据表格的处理示例:

<template>
  <div class="table-to-excel">
    <h3 class="uuid">表格转换Excel</h3>
    <el-button class="button" @click="handleDownToExcel">导出Excel</el-button>
    <el-table :data="tableData" border style="width: 100%">
      <el-table-column prop="date" label="日期" width="180"></el-table-column>
      <el-table-column prop="name" label="姓名" width="180"></el-table-column>
      <el-table-column prop="address" label="地址"></el-table-column>
    </el-table>
     <el-button class="button" @click="handleDownToExcel1">导出Excel</el-button>
    <el-table
      :data="tableData1"
      :span-method="objectSpanMethod"
      border
      style="width: 100%; margin-top: 20px">
      <el-table-column
        prop="id"
        label="ID"
        width="180">
      </el-table-column>
      <el-table-column
        prop="name"
        label="姓名">
      </el-table-column>
      <el-table-column
        prop="amount1"
        label="数值 1(元)">
      </el-table-column>
      <el-table-column
        prop="amount2"
        label="数值 2(元)">
      </el-table-column>
      <el-table-column
        prop="amount3"
        label="数值 3(元)">
      </el-table-column>
    </el-table>
    <el-button class="button" @click="handleDownToExcel2">导出Excel</el-button>
     <el-table
    :data="tableData2"
    style="width: 100%;margin-bottom: 20px;"
    row-key="id"
    border
    default-expand-all
    :tree-props="{children: 'tree_children', hasChildren: 'hasChildren'}">
    <el-table-column
      prop="date"
      label="日期"
      sortable
      width="180">
    </el-table-column>
    <el-table-column
      prop="name"
      label="姓名"
      sortable
      width="180">
    </el-table-column>
    <el-table-column
      prop="address"
      label="地址">
    </el-table-column>
  </el-table>
  </div>
</template>
 
<script>
export default {
  data() {
    return {
      tableData: [
        {
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }
      ],
      tableData1: [{
          id: '12987122',
          name: '王小虎',
          amount1: '234',
          amount2: '3.2',
          amount3: 10
        }, {
          id: '12987123',
          name: '王小虎',
          amount1: '165',
          amount2: '4.43',
          amount3: 12
        }, {
          id: '12987124',
          name: '王小虎',
          amount1: '324',
          amount2: '1.9',
          amount3: 9
        }, {
          id: '12987125',
          name: '王小虎',
          amount1: '621',
          amount2: '2.2',
          amount3: 17
        }, {
          id: '12987126',
          name: '王小虎',
          amount1: '539',
          amount2: '4.1',
          amount3: 15
      }],
      tableData2: [ 
        {
          id: 1,
          date: '2016-05',
          name: '',
          address: '',
          tree_children: [{
              id: 11,
              date: '2016-05-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }, {
              id: 12,
              date: '2016-05-02',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
          }]
        },
        {
          id: 2,
          date: '2016-06',
          name: '',
          address: '',
          tree_children: [{
              id: 21,
              date: '2016-06-01',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
            }, {
              id: 22,
              date: '2016-06-02',
              name: '王小虎',
              address: '上海市普陀区金沙江路 1519 弄'
          }]
        },
        {
          id: 3,
          date: '2016-07',
          name: '',
          address: ''
        }
      ]
    }
  },
  created() {},
  methods: {
    handleDownToExcel() {
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['日期', '姓名', '地址'] // 表头
        const filterVal = ['date', 'name', 'address'] // 表头对应的字段
        const list = this.tableData
        const data = this.formatJson(filterVal, list)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: '测试表格Excel' // 导出excel名称
        })
      })
    },
    handleDownToExcel1() {
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['ID', '姓名', '数值1','数值2','数值3'] // 表头
        const filterVal = ['id', 'name', 'amount1','amount2','amount3'] // 表头对应的字段
        const list = this.tableData1
        const data = this.formatJson(filterVal, list)
        const merges = ['A2:A3', 'A4:A5']
        excel.export_json_to_excel({
          header: tHeader,
          data,
          merges,
          filename: '测试表格Excel1' // 导出excel名称
        })
      })
    },
    formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]))
    },
    handleDownToExcel2() {
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['日期', '姓名', '地址'] // 表头
        const filterVal = ['date', 'name', 'address'] // 表头对应的字段
        const list = this.tableData2
        const data = this.formatJson2(filterVal, list)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: '测试表格Excel2' // 导出excel名称
        })
      })
    },
    formatJson2(filterVal, jsonData) {
      let tempArr = []
      jsonData.forEach(v => {
        tempArr.push(this.formatFun(v, filterVal))
        if(v.tree_children) {
          v.tree_children.forEach(i => {
             tempArr.push(this.formatFun(i, filterVal))
          })
        }
      });
      // console.log(tempArr)
      return tempArr
    },
    formatFun(v,filterVal) {
      // console.log(filterVal.map(j => v[j]))
      return filterVal.map(j => v[j])
    },
    objectSpanMethod({ row, column, rowIndex, columnIndex }) {
        if (columnIndex === 0) {
          if (rowIndex % 2 === 0) {
            return {
              rowspan: 2,
              colspan: 1
            };
          } else {
            return {
              rowspan: 0,
              colspan: 0
            };
          }
        }
      }
  }
}
</script>
<style lang="scss" scoped>
.table-to-excel {
  padding: 20px;
}
</style>
原创文章 103 获赞 128 访问量 3万+

猜你喜欢

转载自blog.csdn.net/qq_42991509/article/details/103322732