vue纯前端导出excel

提供数据

从后端获取list数据或者前端定义list数据。

引用包

"dependencies": {
    "file-saver": "^2.0.1",
    "xlsx-style": "^0.8.13",
}

导出

分别定义表格中展示的名称和list中对应的字段

const tHeader = [
        "登录名",
        "姓名",
        "手机号码",
        "邮箱",
        "状态",
        "类型",
        "机构名称",
        "更新时间"
];
const filterVal = [
    "userName",
    "realName",
    "mobile",
    "email",
    "statusDesc",
    "typeDesc",
    "tierName",
    "createTime"
];

获取list数据

略。包含定义的字段即可

导出实现

downloadExcel("导出数据", tHeader, filterVal, list, () => {});

导出方法

export function downloadExcel(filename, colNameList, colKeyList, list, callback, sheetName) {
  const autoWidth = true
  const bookType = 'xlsx'
  import('@/vendor/Export2Excel').then(excel => {
    const tHeader = colNameList
    const filterVal = colKeyList
    const data = formatJson(filterVal, list)
    filename = (filename != null && filename != '') ? filename : 'excel'
    excel.export_json_to_excel({
      header: tHeader,
      data,
      filename: filename,
      autoWidth: autoWidth,
      bookType: bookType,
      sheetName: sheetName
    })
    if (callback != null && callback != undefined) {
      callback()
    }
  })
}

function formatJson(filterVal, jsonData) {
  const data = []
  for (let i = 0; i < jsonData.length; i++) {
    const row = jsonData[i]
    const val = []
    for (let j = 0; j < filterVal.length; j++) {
      val.push(row[filterVal[j]])
    }
    data.push(val)
  }
  return data
}

Export2Excel

/* eslint-disable */
import { saveAs } from 'file-saver'
import XLSX from "xlsx-style"
// import XLSX from 'xlsx'
// import XLSX from "xlsx-style"


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 = "Sheet1";

  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_multi({
  dataArray,
  filename,
  merges = [],
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  filename = filename || 'excel-list'
  // var dataArray = [{header, data, sheetName}]

  let finalDataArr = []
  let wb = new Workbook();
  if (dataArray != null && dataArray != []) {
    for (let i = 0; i < dataArray.length; i++) {
      let data = [...dataArray[i].data]

      let topHeader = []
      for (let km = 0; km < dataArray[i].header.length; km++) {
        if (km==0) {
          topHeader.push(dataArray[i].sheetName)
        } else {
          topHeader.push("")
        }
      }
      data.unshift(dataArray[i].header);
      data.unshift(topHeader);
      let start = getColumnNameFromIdNotAdd([1, 0])
      let end = getColumnNameFromIdNotAdd([1, dataArray[i].header.length -1])

      merges = [start + ":" + end];
/*      for (let j = dataArray[i].multiHeader.length - 1; j > -1; j--) {
        data.unshift(dataArray[i].multiHeader[j])
      }*/
      finalDataArr.push(data)

      let ws_name = dataArray[i].sheetName;

      let 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;
      //excel标题样式
      let dataInfo = wb.Sheets[ws_name];


      let overCells = []
      let overPosArr = dataArray[i].overPosArr
      if (overPosArr != null && overPosArr != undefined && overPosArr != '') {
        for (let n = 0; n < overPosArr.length; n++) {
          overCells.push(getColumnNameFromId(overPosArr[n]))
        }
      }
      for (let m in dataInfo) {
        if (m == "!ref" || m == "!merges" || m == "!cols" || m == "!rows") { } else {
          let num = getNum(m+"");
          if (num != null && num != undefined && num == 1) {
            dataInfo[m + ""].s = getHeaderStyle();
          }
          if (overCells.indexOf(m + "") >= 0) {
            dataInfo[m + ""].s = getOverStyle();
          }
        }
      }
     /* for (let m = 0; m < dataArray[i].header.length; m++) {
        dataInfo[arr[i]].s = style;
      }*/
    }
    let wbout = XLSX.write(wb, {
      bookType: bookType,
      bookSST: false,
      type: 'binary'
    });
    saveAs(new Blob([s2ab(wbout)], {
      type: "application/octet-stream"
    }), `${filename}.${bookType}`);
  }

  /*data = [...data]
  data.unshift(header);

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




}

function getNum(str) {

  let numArr = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0'];
  let num
 if (str != null && str != '') {
   for (let i = 0; i < str.length; i++) {
     if (numArr.indexOf(str[i]) >= 0) {
      num = str.substring(i)
       return num
     }
   }
 }
}

function getHeaderStyle() {
  const borderAll = {
    top: {
      style: "thin"
    },
    bottom: {
      style: "thin"
    },
    left: {
      style: "thin"
    },
    right: {
      style: "thin"
    }
  };
  let style = {
    // border: borderAll,
    font: {
      // name: "宋体",
      // sz: 18,
      color: { rgb: "000000" },
      bold: true,
      // italic: false,
      // underline: false
    },
    alignment: {
      horizontal: "center",
      vertical: "center"
    }

    // fill: {
    //   fgColor: {rgb: "008000"},
    // },
  };
  return style
}


function getOverStyle() {
  let style = {
    font: {
      // name: "宋体",
      // sz: 18,
      color: { rgb: "FF0000" },
      bold: false,
    }
  };
  return style
}

export function export_json_to_excel({
                                       multiHeader = [],
                                       header,
                                       data,
                                       filename,
                                       merges = [],
                                       autoWidth = true,
                                       bookType = 'xlsx'
                                     } = {}) {
  /* original data */
  filename = filename || 'excel-list'
  data = [...data]
  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }
  data.unshift(header);

  var ws_name = "Sheet1";
  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}`);
}


/**
 * 根据坐标获取列名
 * @param {Object} cellId
 */
function getColumnNameFromId(cellId){
  if (! Array.isArray(cellId)) {
    cellId = cellId.split('-');
  }
  var i = cellId[1];
  var letter = '';
  if (i > 701) {
    letter += String.fromCharCode(64 + parseInt(i / 676));
    letter += String.fromCharCode(64 + parseInt((i % 676) / 26));
  } else if (i > 25) {
    letter += String.fromCharCode(64 + parseInt(i / 26));
  }
  letter += String.fromCharCode(65 + (i % 26));
  return letter + (parseInt(cellId[0]) + 3);
}


/**
 * 根据坐标获取列名
 * @param {Object} cellId
 */
function getColumnNameFromIdNotAdd(cellId){
  if (! Array.isArray(cellId)) {
    cellId = cellId.split('-');
  }
  var i = cellId[1];
  var letter = '';
  if (i > 701) {
    letter += String.fromCharCode(64 + parseInt(i / 676));
    letter += String.fromCharCode(64 + parseInt((i % 676) / 26));
  } else if (i > 25) {
    letter += String.fromCharCode(64 + parseInt(i / 26));
  }
  letter += String.fromCharCode(65 + (i % 26));
  return letter + (parseInt(cellId[0]));
}