vue 使用   excel 导出

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在 vue 中将数据导出为 excel 文件 file-saver+xlsx+script-loader

下载依赖

npm install -S file-saver

npm install -S xlsx

npm install -D script-loader

### 创建文件
**Blob.js** **和** **index.js**

![](https://cdn.bazijun.top/yuqueImg/FoudlpY-MBbrA4JfJuJlY6MdoxAB.png)



#### 引用与使用
`**import { export2Excel } from '@/util/export2Excel'**`

```javascript
formatJson (filterVal, jsonData) {
  return jsonData.map((v) => filterVal.map((j) => v[j]))
}
...
const tHeader = [
  '时间',
  '店铺',
  '支付状态',
  '商品总数',
  ...
]
  const excelData = this.formatJson(
  [
  'happened_at',
  'box_name',
  'status',
  'total_amount',
  'total_price',
  ...
],
  arr
)
excelData.unshift(tHeader)
excelData.unshift([])
excelData.unshift(['手机号码:'].concat(this.row.phones))
export2Excel(tHeader, excelData, name, range)
  ...
```



**文件中添加如下代码**

#### Blob.js
```javascript
/* eslint-disable */
/* Blob.js
* A Blob implementation.
* 2014-05-27
*
* By Eli Grey, http://eligrey.com
* By Devin Samarin, https://github.com/eboyjr
* License: X11/MIT
*   See LICENSE.md
*/


/*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
    ;
    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 (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 = 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 < len; i++) {
        builder.append(blobParts[i]);
      }
    }
    return builder.getBlob(type);
  };
}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));
```



#### index.js (入口)
```javascript
/* eslint-disable */
import './Blob'
import '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);
  console.log('a')
  var oo = generateArray(theTable);
  var ranges = oo[1];


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


export function exportexcel2(th, jsonData, defaultTitle, range) {


  /* original data */


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


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


  /* 自适应宽度 */
  /*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 || val == undefined || val == '') {
      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 * 1.4
      }
    }
  })
                           );
  let result = colWidth[1];
  for (let i = 0; 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
  /* 结束 */


  ws['!merges'] = range
  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;
  console.log(wb)
  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")
}


export function exportJsonToExcel3(th, jsonData, defaultTitle, range) {


  /* original data */


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


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


  ws['!merges'] = range;
  /* 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 || '逃单'
  saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")
}


export function excel(th, jsonData, defaultTitle, range, top = [], rows) {


  /* original data */
  // [{ e: { r: i, c: 0 }, s: { r: d, c: 0 } }, { e: { r: i, c: 1 }, s: { r: d, c: 1 } }, { e: { r: i, c: 2 }, s: { r: d, c: 2 } }, { e: { r: i, c: 3 }, s: { r: d, c: 3 } }, { e: { r: i, c: 4 }, s: { r: d, c: 4 } }, { e: { r: i, c: 5 }, s: { r: d, c: 5 } }, { e: { r: i, c: 6 }, s: { r: d, c: 6 } }, { e: { r: i, c: 7 }, s: { r: d, c: 7 } }]
  // if (range && range.length === 0) {
  //   range = [{e: {r: 0, c: 0}, s: {r: 0, c: 8}}]
  // }
  // console.log(rows)
  // console.log(111)
  // if (rows) {
  //   range = [{e: {r: 0, c: 0}, s: {r: 0, c: (rows)}}]
  // }
  var data = jsonData;
  data.unshift(th);
  let num = 0
  if (top.length >= 2) {
    num = top[1].length
    range = range.concat([{e: {r: 0, c: 0}, s: {r: 0, c: (num - 1)}, font: {color: 'red'}}])
  }
  for (let i = 0; i < top.length; i++) {
    data.unshift(top[top.length - i - 1])
  }
  var ws_name = "SheetJS";


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


  ws['!merges'] = range;
  console.log(ws)
  // ws['A2'].s = { fill: { bgColor: { rgb: '30000000' }, fgColor: { rgb: "AABBCC" }, patternType: 'solid' } }
  // ws['A3'].s = { fill: { bgColor: { rgb: '30000000' }, fgColor: { rgb: "AABBCC" }, patternType: 'solid' } }
  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;
  console.log(wb)
  var wbout = XLSX.write(wb, {bookType: 'xlsx', bookSST: true, type: 'binary', cellStyles: true});
  var title = defaultTitle || '列表'
  saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")
}

```









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