vue-cli3导出表格excel，Export2Excel导出表格，导出多sheet excel，vue导出多页表格

目录

（一）直接调用

 

（二）、封装导出函数调用

---

最近做项目中有一个导出excel表格的需求

具体思路是：后端返回给我json数据，前端根据数据和具体的几项字段去导出excel表格，还有导出多个sheet，多页表格到一个excel表里面，具体思路 根据Export2Excel插件，并修改插件Export2Excel完成导出多页(多个sheet)的excel

第一步：安装插件 依赖

npm install file-saver --save
npm install xlsx --save
npm install script-loader --save-dev

第二步、下载两个所需要的js文件Blob.js和 Export2Excel.js。

下载地址 微信扫描二维码下载

第三步、src目录下新建vendor文件夹，将Blob.js和 Export2Excel.js放进去。

 

（一）直接调用

第一步，在.vue中调用

//引入字段过滤器时间过滤
import { parseTime } from "@/utils/setMethods"



handleDownload () {
      var excelDatas = [
        {
          tHeader: ["Id", "Title", "Author", "Readings", "Date"], // sheet表一头部
          filterVal: ["id", "title", "author", "pageviews", "display_time"], // 表一的数据字段
          tableDatas: this.list, // 表一的整体json数据
          sheetName: "sheet1"// 表一的sheet名字
        },
        {
          tHeader: ["序号", "标题", "作者", "服务"],
          filterVal: ["id", "title", "author", "reviewer"],
          tableDatas: this.list,
          sheetName: "sheet2"
        },
        {
          tHeader: ["序号", "名字", "描述"],
          filterVal: ["userId", "userName", "userDescription"],
          tableDatas: this.rolesList,
          sheetName: "sheet5555"
        }
      ]

      this.json2excel(excelDatas, "数据报表", true, "xlsx")
    },
    // tableJson 导出数据 ; filenames导出表的名字; autowidth表格宽度自动 true or false; bookTypes xlsx & csv & txt
    json2excel (tableJson, filenames, autowidth, bookTypes) {
      var that = this
//这个是引用插件
      import("@/vendor/Export2Excel").then(excel => {
        var tHeader = []
        var dataArr = []
        var sheetnames = []
        for (var i in tableJson) {
          tHeader.push(tableJson[i].tHeader)
          dataArr.push(that.formatJson(tableJson[i].filterVal, tableJson[i].tableDatas))
          sheetnames.push(tableJson[i].sheetName)
        }
        excel.export_json_to_excel({
          header: tHeader,
          data: dataArr,
          sheetname: sheetnames,
          filename: filenames,
          autoWidth: autowidth,
          bookType: bookTypes
        })
      })
    },
    // 数据过滤，时间过滤
    formatJson (filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => {
        if (j === "timestamp") {
          return parseTime(v[j])
        } else {
          return v[j]
        }
      }))
    }

第二步：修改插件Export2Excel导出多个sheet表格，导出多页

修改过的  Export2Excel.js 主要修改 export_json_to_excel 函数

//Export2Excel.js 

/* 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"
  )
}



//主要修改此函数内的方法

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

  for (var i = 0; i < header.length; i++) {
    data[i].unshift(header[i])
  }

  // data.unshift(header)

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

  var ws_name = sheetname
  var wb = new Workbook(),
    ws = []
  for (var j = 0; j < header.length; j++) {
    ws.push(sheet_from_array_of_arrays(data[j]))
  }

  if (merges.length > 0) {
    if (!ws["!merges"]) ws["!merges"] = []
    merges.forEach(item => {
      ws["!merges"].push(XLSX.utils.decode_range(item))
    })
  }
  // console.log("width", autoWidth)
  if (autoWidth) {
    /*设置worksheet每列的最大宽度*/
    var colWidth = []
    for (var k = 0; k < header.length; k++) {
      colWidth.push(
        data[k].map(row =>
          row.map(val => {
            /*先判断是否为null/undefined*/
            if (val == null) {
              return {
                wch: 10
              }
            } else if (val.toString().charCodeAt(0) > 255) {
              /*再判断是否为中文*/
              return {
                wch: val.toString().length * 2
              }
            } else {
              return {
                wch: val.toString().length
              }
            }
          })
        )
      )
    }

    /*以第一行为初始值*/
    let result = []
    for (var k = 0; k < colWidth.length; k++) {
      result[k] = colWidth[k][0]
      for (let i = 1; i < colWidth[k].length; i++) {
        for (let j = 0; j < colWidth[k][i].length; j++) {
          if (result[k][j]["wch"] < colWidth[k][i][j]["wch"]) {
            result[k][j]["wch"] = colWidth[k][i][j]["wch"]
          }
        }
      }
    }
    // 分别给sheet表设置宽度
    for (var l = 0; l < result.length; l++) {
      ws[l]["!cols"] = result[l]
    }
  }

  /* add worksheet to workbook */
  for (var k = 0; k < header.length; k++) {
    wb.SheetNames.push(ws_name[k])
    wb.Sheets[ws_name[k]] = ws[k]
  }

  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false,
    type: "binary"
  })
  saveAs(
    new Blob([s2ab(wbout)], {
      type: "application/octet-stream"
    }),
    `${filename}.${bookType}`
  )
}

Export2Excel.js 原文件

// Export2Excel.js 
/* 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}`);
}

 

（二）、封装导出函数调用

在src中新建utils文件夹 ——> 新建文件setMethods.js

setMethods.js

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string}
 */
export function parseTime (time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || "{y}-{m}-{d} {h}:{i}:{s}"
  let date
  if (typeof time === "object") {
    date = time
  } else {
    if (typeof time === "string" && /^[0-9]+$/.test(time)) {
      time = parseInt(time)
    }
    if (typeof time === "number" && time.toString().length === 10) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  // eslint-disable-next-line
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === "a") {
      return ["日", "一", "二", "三", "四", "五", "六"][value]
    }
    if (result.length > 0 && value < 10) {
      value = "0" + value
    }
    return value || 0
  })
  // eslint-disable-next-line
  return time_str
}

/**
 * Parse the json to excel
 *  tableJson 导出数据 ; filenames导出表的名字; autowidth表格宽度自动 true or false; bookTypes xlsx & csv & txt
 * @param {(Object)} tableJson
 * @param {string} filenames
 * @param {boolean} autowidth
 * @param {string} bookTypes
 */
export function json2excel (tableJson, filenames, autowidth, bookTypes) {
  import("@/vendor/Export2Excel").then(excel => {
    var tHeader = []
    var dataArr = []
    var sheetnames = []
    for (var i in tableJson) {
      tHeader.push(tableJson[i].tHeader)
      dataArr.push(formatJson(tableJson[i].filterVal, tableJson[i].tableDatas))
      sheetnames.push(tableJson[i].sheetName)
    }
    excel.export_json_to_excel({
      header: tHeader,
      data: dataArr,
      sheetname: sheetnames,
      filename: filenames,
      autoWidth: autowidth,
      bookType: bookTypes
    })
  })
}
// 数据过滤，时间过滤
function formatJson (filterVal, jsonData) {
  return jsonData.map(v =>
    filterVal.map(j => {
      if (j === "timestamp") {
        return parseTime(v[j])
      } else {
        return v[j]
      }
    })
  )
}

在需要使用到的 .vue文件组件中调用上面封装的函数

//exportExcel.vue

 

亲测有效！！欢迎留言交流