这里写自定义目录标题
安装
导入两个文件
Blob.js
Export2Excel.js
定义click函数
合并单元格
参考文档

安装
npm install file-saver -S
npm install xlsx -S
npm install -D script-loader

导入两个文件
在src目录下新建一个vendor(可以是别的名字,但是导入时需注意,没事别改,大神请忽略)目录,目录下放新建两个文件Blob.js和Export2Excel.js
Blob.js
/* eslint-disable */
/* Blob.js*/

/*global self, unescape */
/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
  plusplus: true */

/*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */

(function (view) {
  "use strict";

  view.URL = view.URL || view.webkitURL;

  if (view.Blob && view.URL) {
    try {
      new Blob;
      return;
    } catch (e) {
    }
  }

  // Internally we use a BlobBuilder implementation to base Blob off of
  // in order to support older browsers that only have BlobBuilder
  var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function (view) {
    var
      get_class = function (object) {
        return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
      }
      , FakeBlobBuilder = function BlobBuilder() {
        this.data = [];
      }
      , FakeBlob = function Blob(data, type, encoding) {
        this.data = data;
        this.size = data.length;
        this.type = type;
        this.encoding = encoding;
      }
      , FBB_proto = FakeBlobBuilder.prototype
      , FB_proto = FakeBlob.prototype
      , FileReaderSync = view.FileReaderSync
      , FileException = function (type) {
        this.code = this[this.name = type];
      }
      , file_ex_codes = (
        "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
        + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
      ).split(" ")
      , file_ex_code = file_ex_codes.length
      , real_URL = view.URL || view.webkitURL || view
      , real_create_object_URL = real_URL.createObjectURL
      , real_revoke_object_URL = real_URL.revokeObjectURL
      , URL = real_URL
      , btoa = view.btoa
      , atob = view.atob

      , ArrayBuffer = view.ArrayBuffer
      , Uint8Array = view.Uint8Array

      , origin = /^[\w-]+:\/*\[?[\w\.:-]+\]?(?::[0-9]+)?/
    ;
    FakeBlob.fake = FB_proto.fake = true;
    while (file_ex_code--) {
      FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
    }
    // Polyfill URL
    if (!real_URL.createObjectURL) {
      URL = view.URL = function (uri) {
        var
          uri_info = document.createElementNS("http://www.w3.org/1999/xhtml", "a")
          , uri_origin
        ;
        uri_info.href = uri;
        if (!("origin" in uri_info)) {
          if (uri_info.protocol.toLowerCase() === "data:") {
            uri_info.origin = null;
          } else {
            uri_origin = uri.match(origin);
            uri_info.origin = uri_origin && uri_origin[1];
          }
        }
        return uri_info;
      };
    }
    URL.createObjectURL = function (blob) {
      var
        type = blob.type
        , data_URI_header
      ;
      if (type === null) {
        type = "application/octet-stream";
      }
      if (blob instanceof FakeBlob) {
        data_URI_header = "data:" + type;
        if (blob.encoding === "base64") {
          return data_URI_header + ";base64," + blob.data;
        } else if (blob.encoding === "URI") {
          return data_URI_header + "," + decodeURIComponent(blob.data);
        }
        if (btoa) {
          return data_URI_header + ";base64," + btoa(blob.data);
        } else {
          return data_URI_header + "," + encodeURIComponent(blob.data);
        }
      } else if (real_create_object_URL) {
        return real_create_object_URL.call(real_URL, blob);
      }
    };
    URL.revokeObjectURL = function (object_URL) {
      if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
        real_revoke_object_URL.call(real_URL, object_URL);
      }
    };
    FBB_proto.append = function (data/*, endings*/) {
      var bb = this.data;
      // decode data to a binary string
      if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
        var
          str = ""
          , buf = new Uint8Array(data)
          , i = 0
          , buf_len = buf.length
        ;
        for (; i < buf_len; i++) {
          str += String.fromCharCode(buf[i]);
        }
        bb.push(str);
      } else if (get_class(data) === "Blob" || get_class(data) === "File") {
        if (FileReaderSync) {
          var fr = new FileReaderSync;
          bb.push(fr.readAsBinaryString(data));
        } else {
          // async FileReader won't work as BlobBuilder is sync
          throw new FileException("NOT_READABLE_ERR");
        }
      } else if (data instanceof FakeBlob) {
        if (data.encoding === "base64" && atob) {
          bb.push(atob(data.data));
        } else if (data.encoding === "URI") {
          bb.push(decodeURIComponent(data.data));
        } else if (data.encoding === "raw") {
          bb.push(data.data);
        }
      } else {
        if (typeof data !== "string") {
          data += ""; // convert unsupported types to strings
        }
        // decode UTF-16 to binary string
        bb.push(unescape(encodeURIComponent(data)));
      }
    };
    FBB_proto.getBlob = function (type) {
      if (!arguments.length) {
        type = null;
      }
      return new FakeBlob(this.data.join(""), type, "raw");
    };
    FBB_proto.toString = function () {
      return "[object BlobBuilder]";
    };
    FB_proto.slice = function (start, end, type) {
      var args = arguments.length;
      if (args < 3) {
        type = null;
      }
      return new FakeBlob(
        this.data.slice(start, args > 1 ? end : this.data.length)
        , type
        , this.encoding
      );
    };
    FB_proto.toString = function () {
      return "[object Blob]";
    };
    FB_proto.close = function () {
      this.size = 0;
      delete this.data;
    };
    return FakeBlobBuilder;
  }(view));

  view.Blob = function (blobParts, options) {
    var type = options ? (options.type || "") : "";
    var builder = new BlobBuilder();
    if (blobParts) {
      for (var i = 0, len = blobParts.length; i < len; i++) {
        if (Uint8Array && blobParts[i] instanceof Uint8Array) {
          builder.append(blobParts[i].buffer);
        }
        else {
          builder.append(blobParts[i]);
        }
      }
    }
    var blob = builder.getBlob(type);
    if (!blob.slice && blob.webkitSlice) {
      blob.slice = blob.webkitSlice;
    }
    return blob;
  };

  var getPrototypeOf = Object.getPrototypeOf || function (object) {
    return object.__proto__;
  };
  view.Blob.prototype = getPrototypeOf(new view.Blob());
}(
  typeof self !== "undefined" && self
  || typeof window !== "undefined" && window
  || this
));


Export2Excel.js
/* eslint-disable */
require('script-loader!file-saver');
// 注意,更改vendor目录此处导入需修改!!!!!!!!!!!!!!!!!!!!
require('script-loader!src/vendor/Blob');
require('script-loader!xlsx/dist/xlsx.core.min');

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);
  console.log('a')
  var oo = generateArray(theTable);
  var ranges = oo[1];

  /* original data */
  var data = oo[0];
  var ws_name = "SheetJS";
  console.log(data);

  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")
}

function formatJson(jsonData) {
  console.log(jsonData)
}

export function export_json_to_excel(th, jsonData, defaultTitle) {

  /* original data */

  var data = jsonData;
  data.unshift(th);
  var ws_name = "SheetJS";

  var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);


  /* 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'});
  var title = defaultTitle || '列表'
  saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")
}


定义click函数
当我们要导出表格执行@click事件调用handleDownload函数
handleDownload() {
        this.downloadLoading = true
        require.ensure([], () => {
          const {export_json_to_excel} = require('src/vendor/Export2Excel')
          const tHeader = Util.cutValue(this.columns1, 'title')
          const filterVal = Util.cutValue(this.columns1, 'key')
          const list = this.tableData1
          const data = this.formatJson(filterVal, list)
          export_json_to_excel(tHeader, data, '列表excel')
          this.downloadLoading = false
        })
      },
      formatJson(filterVal, jsonData) {
        return jsonData.map(v => filterVal.map(j => v[j]))
      }

Util.cutValue 是公共方法，目的是为了将，tHeader 和filterVal 的值转成数组从而生成表格
### Util module
// 截取value值
utils.cutValue = function (target, name) {
  let arr = []
  for (let i = 0; i < target.length; i++) {
    arr.push(target[i][name])
  }
  return arr
}

columns1数据结构如下,本质就是生产一个列表,也可将tHeader和filterVal 直接定义一列表,tableData格式是列表里套对象,具体可自行尝试
columns1: [
          {
            title: '序号',
            key: 'serNum'
          },
          {
            title: '选择',
            key: 'choose',
            align: 'center',
            render: (h, params) => {
              if (params.row.status !== '1' && params.row.status !== '2') {
                return h('div', [
                  h('checkbox', {
                    props: {
                      type: 'selection'
                    },
                    on: {
                      'input': (val) => {
                        console.log(val)
                      }
                    }
                  })
                ])
              } else {
                return h('span', {
                  style: {
                    color: '#587dde',
                    cursor: 'pointer'
                  },
                  on: {
                    click: () => {
                      // this.$router.push({name: '', query: { id: params.row.id }})
                    }
                  }
                }, '查看订单')
              }
            }
          },
          ...
        ],

合并单元格
一些复杂的表头并不是只有一行,还需合并单元格

更改Export2Excel.js文件中的export_json_to_excel函数
export function export_json_to_excel(th1, th, jsonData, defaultTitle) {

  /* original data */

  var data = jsonData;
  // 第二行表头
  data.unshift(th);
  // 第一行表头
  data.unshift(th1)
  // 这个地方定义sheet名,可更改
  var ws_name = "SheetJS";

  var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);


  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;
  
  // 设置合并单元格,注意预留空值,否则合并后值会被覆盖
  ws['!merges'] = [
    // 设置A3-A9的单元格合并
    {s: {r: 0, c: 2}, e: {r: 0, c: 8}}
  ];

  var wbout = XLSX.write(wb, {bookType: 'xlsx', bookSST: false, type: 'binary'});
  var title = defaultTitle || '列表'
  saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")
}

click调用时候相应传参也许更改
handleDownload() {
        this.downloadLoading = true
        require.ensure([], () => {
          const {export_json_to_excel} = require('src/vendor/Export2Excel')
          const multiHeader = ['A1', 'A2', '合并', '', '', '', '', '', '', 'A10']
          const tHeader = ['name', '用户名', '性别']
          const filterVal = ['name', 'username', 'sex']
          const list = this.tableData1
          const data = this.formatJson(filterVal, list)
          export_json_to_excel(multiHeader, tHeader, data, '列表excel')
          this.downloadLoading = false
        })
      },
      formatJson(filterVal, jsonData) {
        return jsonData.map(v => filterVal.map(j => v[j]))
      }

tableDate格式
tableDate1: [
        {'name': 'lgk', 'sex': '男', 'username': 'liqing'},
        {'name': 'll', 'sex': '女', 'username': 'yaoyao'}
      ]

参考文档
https://sheetjs.gitbooks.io/docs/#sheetjs-js-xlsx

https://github.com/han6054/export-excel

npm install --save xlsx file-saver
创建@/vendor/Export2Excel.js：
require('script-loader!file-saver');
require('script-loader!@/vendor/Blob'); //在vendor文件加下建立Blob.js，代码在最下方
import XLSXfrom 'xlsx'
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
if (range.e.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;
}
// 单列合并数据加工
//在tableData数据中对colName列进行加工(header:['xx','yy',...],mergeRule:[2,1,1,3,2,1...])
// 返回格式 newTableDatas = [[列头s], ["abc", "ss", "yyy", 0], [null, "xx", "y", 1], ["bca", "xxx", "yy", 1], [null, "xxx", "yy", 1]]
// 返回格式 newMergeRules = [{"e":{"r":2,"c":0}, "s":{"r":1,"c":0}},{"e":{"r":4,"c":0}, "s":{"r":3,"c":0}}]
function formatTableData(header,tableDatas,mergeRules,colIndex,colName){
var newTableDatas = [header]// 第一行为列头,
var newMergeRules= []//加工合并规则
var currRowIndex =1 // 因为第一行为列头所以起始为1
var mergeIndexs = [currRowIndex]// 因为第一行为列头所以起始为1,为创建newTableDatas使用
for(var i=0;i
var endRowIndex =currRowIndex + mergeRules[i] -1
var merge = {"e":{"r":endRowIndex,"c": colIndex},"s":{"r":currRowIndex,"c":colIndex}}
newMergeRules.push(merge)
currRowIndex =currRowIndex + mergeRules[i]
mergeIndexs.push(currRowIndex)
}
for(var i=0;i
var currRow = tableDatas[i]
if(mergeIndexs.indexOf(i+1) === -1){
currRow[colName] =null //合并的数据 但不是第一行时，此列赋值null
}
var newTabRow = []
for (var j in currRow) {
newTabRow.push(currRow[j])
}
newTableDatas.push(newTabRow)
}
return [newTableDatas,newMergeRules]
}
@/vendor/Blob.js：
export function export_data_to_excel(header,tableDatas,mergeRules,colIndex,colName,excelName) {
var oo =formatTableData(header,tableDatas,mergeRules,colIndex,colName);
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"}), excelName+".xlsx")
}
(function (view) {
"use strict";
view.URL = view.URL || view.webkitURL;
if (view.Blob && view.URL) {
try {
new Blob;
return;
}catch (e) {}
}
// Internally we use a BlobBuilder implementation to base Blob off of
// in order to support older browsers that only have BlobBuilder
var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) {
var
get_class =function(object) {
return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
}
,FakeBlobBuilder =function BlobBuilder() {
this.data = [];
}
,FakeBlob =function Blob(data, type, encoding) {
this.data = data;
this.size = data.length;
this.type = type;
this.encoding = encoding;
}
,FBB_proto =FakeBlobBuilder.prototype
,FB_proto =FakeBlob.prototype
,FileReaderSync = view.FileReaderSync
,FileException =function(type) {
this.code =this[this.name = type];
}
,file_ex_codes = (
"NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
+"NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
).split(" ")
,file_ex_code =file_ex_codes.length
,real_URL = view.URL || view.webkitURL || view
,real_create_object_URL =real_URL.createObjectURL
,real_revoke_object_URL =real_URL.revokeObjectURL
,URL =real_URL
,btoa = view.btoa
,atob = view.atob
,ArrayBuffer = view.ArrayBuffer
,Uint8Array = view.Uint8Array
;
FakeBlob.fake =FB_proto.fake =true;
while (file_ex_code--) {
FileException.prototype[file_ex_codes[file_ex_code]] =file_ex_code +1;
}
if (!real_URL.createObjectURL) {
URL = view.URL = {};
}
URL.createObjectURL =function(blob) {
var
type = blob.type
,data_URI_header
;
if (type ===null) {
type ="application/octet-stream";
}
if (blobinstanceof FakeBlob) {
data_URI_header ="data:" +type;
if (blob.encoding ==="base64") {
return data_URI_header +";base64," + blob.data;
}else if (blob.encoding ==="URI") {
return data_URI_header +"," +decodeURIComponent(blob.data);
}if (btoa) {
return data_URI_header +";base64," +btoa(blob.data);
}else {
return data_URI_header +"," +encodeURIComponent(blob.data);
}
}else if (real_create_object_URL) {
return real_create_object_URL.call(real_URL, blob);
}
};
URL.revokeObjectURL =function(object_URL) {
if (object_URL.substring(0,5) !=="data:" &&real_revoke_object_URL) {
real_revoke_object_URL.call(real_URL, object_URL);
}
};
FBB_proto.append =function(data/*, endings*/) {
var bb =this.data;
// decode data to a binary string
if (Uint8Array && (datainstanceof ArrayBuffer || datainstanceof Uint8Array)) {
var
str =""
,buf =new Uint8Array(data)
,i =0
,buf_len =buf.length
;
for (;i
str +=String.fromCharCode(buf[i]);
}
bb.push(str);
}else if (get_class(data) ==="Blob" ||get_class(data) ==="File") {
if (FileReaderSync) {
var fr =new FileReaderSync;
bb.push(fr.readAsBinaryString(data));
}else {
// async FileReader won't work as BlobBuilder is sync
throw new FileException("NOT_READABLE_ERR");
}
}else if (datainstanceof FakeBlob) {
if (data.encoding ==="base64" &&atob) {
bb.push(atob(data.data));
}else if (data.encoding ==="URI") {
bb.push(decodeURIComponent(data.data));
}else if (data.encoding ==="raw") {
bb.push(data.data);
}
}else {
if (typeof data !=="string") {
data +="";// convert unsupported types to strings
}
// decode UTF-16 to binary string
bb.push(unescape(encodeURIComponent(data)));
}
};
FBB_proto.getBlob =function(type) {
if (!arguments.length) {
type =null;
}
return new FakeBlob(this.data.join(""), type,"raw");
};
FBB_proto.toString =function() {
return "[object BlobBuilder]";
};
FB_proto.slice =function(start, end, type) {
var args =arguments.length;
if (args <3) {
type =null;
}
return new FakeBlob(
this.data.slice(start,args >1 ? end :this.data.length)
, type
,this.encoding
);
};
FB_proto.toString =function() {
return "[object Blob]";
};
FB_proto.close =function() {
this.size =this.data.length =0;
};
return FakeBlobBuilder;
}(view));
view.Blob =function Blob(blobParts, options) {
var type = options ? (options.type ||"") :"";
var builder =new BlobBuilder();
if (blobParts) {
for (var i =0,len = blobParts.length;i
builder.append(blobParts[i]);
}
}
return builder.getBlob(type);
};
}(typeof self !=="undefined" &&self ||typeof window !=="undefined" &&window ||this.content ||this));

src/libs/目录下增加excel.js 

excel.js 

/* eslint-disable */
import XLSX from 'xlsx';

function auto_width(ws, data){
    /*set worksheet max width per col*/
    const colWidth = data.map(row => row.map(val => {
        /*if null/undefined*/
        if (val == null) {
            return {'wch': 10};
        }
        /*if chinese*/
        else if (val.toString().charCodeAt(0) > 255) {
            return {'wch': val.toString().length * 2};
        } else {
            return {'wch': val.toString().length};
        }
    }))
    /*start in the first row*/
    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;
}

function json_to_array(key, jsonData){
    return jsonData.map(v => key.map(j => { return v[j] }));
}

// fix data,return string
function fixdata(data) {
    let o = ''
    let l = 0
    const w = 10240
    for (; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)))
    o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)))
    return o
}

// get head from excel file,return array
function get_header_row(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 */
        var cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })] /* find the cell in the first row */
        var hdr = 'UNKNOWN ' + C // <-- replace with your desired default
        if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
        headers.push(hdr)
    }
    return headers
}

export const export_table_to_excel= (id, filename) => {
    const table = document.getElementById(id);
    const wb = XLSX.utils.table_to_book(table, { raw: true });
    XLSX.writeFile(wb, filename);

    /* the second way */
    // const table = document.getElementById(id);
    // const wb = XLSX.utils.book_new();
    // const ws = XLSX.utils.table_to_sheet(table);
    // XLSX.utils.book_append_sheet(wb, ws, filename);
    // XLSX.writeFile(wb, filename);
}

export const export_json_to_excel = ({data, key, title, filename, autoWidth}) => {
    const wb = XLSX.utils.book_new();
    data.unshift(title);
    const ws = XLSX.utils.json_to_sheet(data, {header: key, skipHeader: true});
    if(autoWidth){
        const arr = json_to_array(key, data);
        auto_width(ws, arr);
    }
    XLSX.utils.book_append_sheet(wb, ws, filename);
    XLSX.writeFile(wb, filename + '.xlsx');
}

export const export_array_to_excel = ({key, data, title, filename, autoWidth}) => {
    const wb = XLSX.utils.book_new();
    const arr = json_to_array(key, data);
    arr.unshift(title);
    const ws = XLSX.utils.aoa_to_sheet(arr);
    if(autoWidth){
        auto_width(ws, arr);
    }
    XLSX.utils.book_append_sheet(wb, ws, filename);
    XLSX.writeFile(wb, filename + '.xlsx');
}

export const read = (data, type) => {
    /* if type == 'base64' must fix data first */
    // const fixedData = fixdata(data)
    // const workbook = XLSX.read(btoa(fixedData), { type: 'base64' })
    const workbook = XLSX.read(data, { type: type });
    const firstSheetName = workbook.SheetNames[0];
    const worksheet = workbook.Sheets[firstSheetName];
    const header = get_header_row(worksheet);
    const results = XLSX.utils.sheet_to_json(worksheet);
    return {header, results};
}

export default {
  export_table_to_excel,
  export_array_to_excel,
  export_json_to_excel,
  read
}


使用方法export_table_to_excel导出EXCEL,即可导出包含合并单元格格式的EXCEL

  handleExport(){

       excel.export_table_to_excel("maintable","TEST.xlsx");

    }

使用以下方法导出后，%变为0，百分制格式的字符串也变成了数字， 然后通过设置raw:true，就可以导出字符串并没有做转换。

export const export_table_to_excel= (id, filename) => {

    const table = document.getElementById(id);

    const wb = XLSX.utils.table_to_book(table);

    XLSX.writeFile(wb, filename);

}

 

 const wb = XLSX.utils.table_to_book(table, { raw: true });

 

vue + element中 el-table 导出Excel（合并单元格，解决输入框问题）
单纯记笔记，嘻嘻

合并单元格解决了，页面输入框也解决了
第一步可能需要安装相关依赖

npm install --save xlsx file-saver
2、在组件里面引入依赖

import FileSaver from ‘file-saver’

import XLSX from ‘xlsx’
3、在methods里写一个方法（直接复制就可以）

exportExcel () {

var wb = XLSX.utils.table_to_book(document.querySelector(’#out-table’))

var wbout = XLSX.write(wb, { bookType: ‘xlsx’, bookSST: true, type: ‘array’ })

try {

FileSaver.saveAs(new Blob([wbout], { type: ‘application/octet-stream’ }), ‘sheetjs.xlsx’)

} catch (e) { if (typeof console !== ‘undefined’) console.log(e, wbout) }

return wbout

},

***注意：XLSX.uitls.table_to_book(“#out-table”为el-table标签的id) ，sheetjs 就是导出表格的名字，可以更改！***
4、点击设置好的导出按钮执行 上面的方法就行啦 。
5.直接将页面的数据布局复制下来，单元格也会合并。
6.页面数据如果有输入框（不支持直接生成，输入框生成后无数据），或者需要在其他页面生成时，可以写一个隐藏的el-table，进行同步。**
7.没得图片，忘记截图了 >-<