vue纯前台导出---最全版本

原创已于 2023-11-08 11:38:57 修改 · 274 阅读

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#vue.js #前端 #javascript

于 2023-11-08 11:36:26 首次发布

博客介绍了纯Vue前台导出Excel的方法，重点讲解直接导出方式。首先要确保“node_modules”中有xlsx库，介绍了下载xlsx的方法，安装后需添加两个js文件处理数据解析，最后在前台引用xls方法编写导出方法。还提到带样式导出会报错，寻求解决办法。

在实现纯vue前台导出excel导出有两种，第一种就是直接导出还有一种就是存在样式导出。
今天我们学习的是第一种方式，直接导出。
在直接导出的时候存在一个前提就是，在你的“node_modules”中是否存在xlsx库，如果不存在则要添加。
1：添加xlsx方法
-下载xlsx有两种:

第一种：npm install xlsx --save 
第二种：npm install xlsx-style --save （存在导出样式）

当然建议你们使用第一种方法进行添加，因为本次讲解的是第一种方式直接导出、
2:添加js方法实现导出excel
当你安装完成xlsx后，我们还需要添加两个js文件，这两个js会处理你导出时传过去的数据并解析。

1：Blob.js 内容

/* 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));

2：Export2Excel.js 信息内容

/* eslint-disable */
// require('script-loader!file-saver');
// require('script-loader!@/vendor/Blob');
require('script-loader!file-saver');
require('./Blob');
//require('script-loader!./Blob');
require('script-loader!xlsx/dist/xlsx.core.min');
import * as XLSX from 'xlsx'
// import * as 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;
}
//将json转换成excel并提供下载
//header:头部【‘姓名+转正时间.....’】
//data:列表数据【江三+2020-11-20.....】
//filename：下载文件名，默认excel-list
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 download(data) {
//    return request({
//        url: 'C:/Users/23751/download',
//        method: 'get',
//        data: data,
//        responseType: 'blob'
//    })
//}
// th, jsonData, defaultTitle
// header, // 表头 必填
// data, // 具体数据 必填
// filename: 'excel', // 文件名称
// autoWidth: true, // 宽度是否自适应
// bookType: 'xlsx' // 生成的文件类型

// multiHeader = [], header,  data, filename,  merges = [], percent = [], autoWidth = true, bookType = 'xlsx'
export function export_json_to_excel(th, jsonData, defaultTitle, multiHeader = [], merges = [], percent = [], autoWidth = true, bookType = 'xlsx') {
  // console.log(multiHeader = [], header,  data, filename,  merges = [], percent = [])
  /* original data */

  // var data = jsonData;
  var data = jsonData
  data.unshift(th);
  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }
  var ws_name = "SheetJS";
  // debugger
  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))
    })
  }


  /*设置worksheet每列的最大宽度*/
  if (autoWidth) {
    const colWidth = data.map(row => row.map(val => {
      /*先判断是否为null/undefined*/
      if (val == null || val == undefined) {
        return { 'wch': 20 };
      }
      /*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 * 2 };
      }
    }))
    /*以第一行为初始值*/  /* 以主表第二行为初始值，因为我的第一行是表格标题，会比较长，所以以主表第二行为初始值*/
    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 dataInfo = wb.Sheets[wb.SheetNames[0]];

  const borderAll = {  //单元格外侧框线
    top: {
      style: 'thin'
    },
    bottom: {
      style: 'thin'
    },
    left: {
      style: 'thin'
    },
    right: {
      style: 'thin'
    }
  };
  var merges = [];
  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = [];
    merges.forEach(item => {
      ws['!merges'].push(XLSX.utils.decode_range(item))
    })
  }
  //给所以单元格加上边框
  for (var i in dataInfo) {
    if (i == '!ref' || i == '!merges' || i == '!cols' || i == 'A1') {

    } else {
      dataInfo[i + ''].s = {
        border: borderAll,
        alignment: {
          horizontal: 'center',
          vertical: 'center'
        },
        font: {
          name: '微软雅黑',
          sz: 12
        }
      }


      // dataInfo[i + ''].s = {
      //   border: borderAll
      // }
    }
  }

  const arrabc = ['A',
    'B',
    'C',
    'D',
    'E',
    'F',
    'G',
    'H',
    'I',
    'J',
    'K',
    'L',
    'M',
    'N',
    'O',
    'P',
    'Q',
    'R',
    'S',
    'T',
    'U',
    'V',
    'W',
    'X',
    'Y',
    'Z'
  ]

  // 给标题、表格描述信息、表头等部分加上特殊格式
  arrabc.some(function (v) {
    for (let j = 1; j < (data.length + 1); j++) {
      const _v = v + j
      if (dataInfo[_v]) {
        dataInfo[_v].s = {}
        // 标题部分A1-Z1
        dataInfo['A' + j].s = {
          border: borderAll,
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            },
            bold: true
          },
          alignment: {
            horizontal: 'center',
            vertical: 'center'
          }
        }
        dataInfo[v + j].s = {
          border: borderAll,
          numFmt: '0.00',
          font: {
            name: '微软雅黑',
            sz: 12,
            color: {
              rgb: '000000'
            }
          },
          alignment: {
            horizontal: 'right',
            vertical: 'center'
          }
        }
        // 头部
        if (j == 1) {
          dataInfo[v + j].s = {
            border: borderAll,
            font: {
              name: '微软雅黑',
              sz: 13,
              color: {
                rgb: '000000'
              },
              bold: true
            },
            alignment: {
              horizontal: 'center',
              vertical: 'center'
            },
            fill: {
              fgColor: {
                rgb: 'f0f0f0'
              }
            }
          }
        }
        // 百分比 %
        if (percent.length != 0) {
          for (let index = 0; index < percent.length; index++) {
            if (j == percent[index]) {
              dataInfo[v + percent[index]].s = {
                numFmt: '0.00%',
                border: borderAll,
                font: {
                  name: '微软雅黑',
                  sz: 12,
                  color: {
                    rgb: '000000'
                  }
                },
                alignment: {
                  horizontal: 'right',
                  vertical: 'center'
                },
                fill: {
                  fgColor: {
                    rgb: 'FFF8DC'
                  }
                }
              }
            }
          }
        }
      }
    }
  })


  // //设置主标题样式
  // dataInfo["A1"].s = {
  //   font: {
  //     name: '宋体',
  //     sz: 18,
  //     color: { rgb: "ff0000" },
  //     bold: true,
  //     italic: false,
  //     underline: false
  //   },
  //   alignment: {
  //     horizontal: "center",
  //     vertical: "center"
  //   },
  // }


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

当你们已经创建这两个js之后，我们就可以到前台去编写导出方法了。
1：在前台引用xls方法

import * as  XLSX from "xlsx";

当引用完成后开始编写方法了（按钮方法名自行编写）


```csharp
//导出Execl
            handleExport() {
                this.$confirm('正在导出数据，是否继续', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    //导出
                    require.ensure([], () => {
                        const { export_json_to_excel } = require('.../Export2Excel.js');   //注意这个Export2Excel路径
                        const tableHeader = ['xxxx', 'xxxx', 'xxxx电话', '公司xxxx'];   // 设置Excel表格的表头 (存放你们的字段名称)
                        const filterVal = ['xxxxx', 'xxxxxxx', 'xxxxxx', 'xxxxx', ];  // 跟表格表头对应的绑定的prop (存放你们的字段)
                        var selectList = []; // 接收数据
                        selectList = this.deleteRowIdArraysStaff;
                        let date = new Date()
                        let y = date.getFullYear()
                        let m = date.getMonth() + 1
                        let d = date.getDate()
                        let time = y + '.' + m + '.' + d;
                        **备注：selectList 是根据你们选择的行数来进行判断的、集合类型**
                        if (selectList.length == 1) {
                            for (var i = 0; i < selectList.length; i++) {
                                let list = this.filterTableData(JSON.parse(JSON.stringify(selectList)));   // this.selectList为选中的要导出的数据，用filterTableData方法先处理一下数据格式(要进行深度拷贝，以免过滤的时候，影响页面上展示的数据)，再存到list
                                let data = this.formatJson(filterVal, list);
                                export_json_to_excel(tableHeader, data, '导出excel文件名' + "-" + 时间);  //最后一个是导出表格的名字
                            }
                        }
                            else {
                                let list = this.filterTableData(JSON.parse(JSON.stringify(selectList)));
                                let data = this.formatJson(filterVal, list);
                                export_json_to_excel(tableHeader, data, '导出excel文件名' + "-" + 时间);
                            }
                        }
                    })
                }).catch(() => {
                    this.$message({
                        type: 'info',
                        message: '已取消导出'
                    });
                });
            },
            formatJson(filterVal, Data) {
                return Data.map(v => filterVal.map(j => v[j]))
            },
            //导出数据前对数据处理
            filterTableData(data) {
                data.forEach(item => {
                备注：在此处进行导出前处理数据、
                如：时间
                    item.xx= item.xx== "" ? "" : this.dayjs(item.xx).format("YYYY-MM-DD HH:mm")
                    item.xx= item.xx== null ? "" : this.dayjs(item.xx).format("YYYY-MM-DD HH:mm")
                  
                    
                   
                   
                })
                return data;
            },