1、安装插件

  1. npm install file-saver --save
  2. npm install script-loader -D
  3. npm install xlsx --save

在src目录，utils文件夹下新建 Blob.js 和 Export2Excel.jsimage.png

  2. /*global self, unescape */
  3. /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
  4.  plusplus: true */
  5.  (function(view) {
  6.     "use strict";
  8.     view.URL = view.URL || view.webkitURL;
  10.     if (view.Blob && view.URL) {
  11.       try {
  12.         new Blob();
  13.         return;
  14.       } catch (e) {}
  15.     }
  17.     // Internally we use a BlobBuilder implementation to base Blob off of
  18.     // in order to support older browsers that only have BlobBuilder
  19.     var BlobBuilder =
  20.       view.BlobBuilder ||
  21.       view.WebKitBlobBuilder ||
  22.       view.MozBlobBuilder ||
  23.       (function(view) {
  24.         var get_class = function(object) {
  25.             return Object.prototype.toString
  26.               .call(object)
  27.               .match(/^\[object\s(.*)\]$/)[1];
  28.           },
  29.           FakeBlobBuilder = function BlobBuilder() {
  30.             this.data = [];
  31.           },
  32.           FakeBlob = function Blob(data, type, encoding) {
  33.             this.data = data;
  34.             this.size = data.length;
  35.             this.type = type;
  36.             this.encoding = encoding;
  37.           },
  38.           FBB_proto = FakeBlobBuilder.prototype,
  39.           FB_proto = FakeBlob.prototype,
  40.           FileReaderSync = view.FileReaderSync,
  41.           FileException = function(type) {
  42.             this.code = this[(this.name = type)];
  43.           },
  44.           file_ex_codes = (
  45.             "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR " +
  46.             "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
  47.           ).split(" "),
  48.           file_ex_code = file_ex_codes.length,
  49.           real_URL = view.URL || view.webkitURL || view,
  50.           real_create_object_URL = real_URL.createObjectURL,
  51.           real_revoke_object_URL = real_URL.revokeObjectURL,
  52.           URL = real_URL,
  53.           btoa = view.btoa,
  54.           atob = view.atob,
  55.           ArrayBuffer = view.ArrayBuffer,
  56.           Uint8Array = view.Uint8Array;
  57.         FakeBlob.fake = FB_proto.fake = true;
  58.         while (file_ex_code--) {
  59.           FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
  60.         }
  61.         if (!real_URL.createObjectURL) {
  62.           URL = view.URL = {};
  63.         }
  64.         URL.createObjectURL = function(blob) {
  65.           var type = blob.type,
  66.             data_URI_header;
  67.           if (type === null) {
  68.             type = "application/octet-stream";
  69.           }
  70.           if (blob instanceof FakeBlob) {
  71.             data_URI_header = "data:" + type;
  72.             if (blob.encoding === "base64") {
  73.               return data_URI_header + ";base64," + blob.data;
  74.             } else if (blob.encoding === "URI") {
  75.               return data_URI_header + "," + decodeURIComponent(blob.data);
  76.             }
  77.             if (btoa) {
  78.               return data_URI_header + ";base64," + btoa(blob.data);
  79.             } else {
  80.               return data_URI_header + "," + encodeURIComponent(blob.data);
  81.             }
  82.           } else if (real_create_object_URL) {
  83.             return real_create_object_URL.call(real_URL, blob);
  84.           }
  85.         };
  86.         URL.revokeObjectURL = function(object_URL) {
  87.           if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
  88.             real_revoke_object_URL.call(real_URL, object_URL);
  89.           }
  90.         };
  91.         FBB_proto.append = function(data /*, endings*/) {
  92.           var bb = this.data;
  93.           // decode data to a binary string
  94.           if (
  95.             Uint8Array &&
  96.             (data instanceof ArrayBuffer || data instanceof Uint8Array)
  97.           ) {
  98.             var str = "",
  99.               buf = new Uint8Array(data),
  100.               i = 0,
  101.               buf_len = buf.length;
  102.             for (; i < buf_len; i++) {
  103.               str += String.fromCharCode(buf[i]);
  104.             }
  105.             bb.push(str);
  106.           } else if (get_class(data) === "Blob" || get_class(data) === "File") {
  107.             if (FileReaderSync) {
  108.               var fr = new FileReaderSync();
  109.               bb.push(fr.readAsBinaryString(data));
  110.             } else {
  111.               // async FileReader won't work as BlobBuilder is sync
  112.               throw new FileException("NOT_READABLE_ERR");
  113.             }
  114.           } else if (data instanceof FakeBlob) {
  115.             if (data.encoding === "base64" && atob) {
  116.               bb.push(atob(data.data));
  117.             } else if (data.encoding === "URI") {
  118.               bb.push(decodeURIComponent(data.data));
  119.             } else if (data.encoding === "raw") {
  120.               bb.push(data.data);
  121.             }
  122.           } else {
  123.             if (typeof data !== "string") {
  124.               data += ""; // convert unsupported types to strings
  125.             }
  126.             // decode UTF-16 to binary string
  127.             bb.push(unescape(encodeURIComponent(data)));
  128.           }
  129.         };
  130.         FBB_proto.getBlob = function(type) {
  131.           if (!arguments.length) {
  132.             type = null;
  133.           }
  134.           return new FakeBlob(this.data.join(""), type, "raw");
  135.         };
  136.         FBB_proto.toString = function() {
  137.           return "[object BlobBuilder]";
  138.         };
  139.         FB_proto.slice = function(start, end, type) {
  140.           var args = arguments.length;
  141.           if (args < 3) {
  142.             type = null;
  143.           }
  144.           return new FakeBlob(
  145.             this.data.slice(start, args > 1 ? end : this.data.length),
  146.             type,
  147.             this.encoding
  148.           );
  149.         };
  150.         FB_proto.toString = function() {
  151.           return "[object Blob]";
  152.         };
  153.         FB_proto.close = function() {
  154.           this.size = this.data.length = 0;
  155.         };
  156.         return FakeBlobBuilder;
  157.       })(view);
  159.     view.Blob = function Blob(blobParts, options) {
  160.       var type = options ? options.type || "" : "";
  161.       var builder = new BlobBuilder();
  162.       if (blobParts) {
  163.         for (var i = 0, len = blobParts.length; i < len; i++) {
  164.           builder.append(blobParts[i]);
  165.         }
  166.       }
  167.       return builder.getBlob(type);
  168.     };
  169.   })(
  170.     (typeof self !== "undefined" && self) ||
  171.       (typeof window !== "undefined" && window) ||
  172.       this.content ||
  173.       this
  174.   );
  1. //Export2Excel.js
  2. require("script-loader!file-saver");
  3. // require("script-loader!./Blob.js"); //转二进制用  引入项目中的blob的实际路径
  4. require('./Blob');//转二进制用
  5. require("script-loader!xlsx/dist/xlsx.core.min");
  7. function generateArray(table) {
  8.   var out = [];
  9.   var rows = table.querySelectorAll("tr");
  10.   var ranges = [];
  11.   for (var R = 0; R < rows.length; ++R) {
  12.     var outRow = [];
  13.     var row = rows[R];
  14.     var columns = row.querySelectorAll("td");
  15.     for (var C = 0; C < columns.length; ++C) {
  16.       var cell = columns[C];
  17.       var colspan = cell.getAttribute("colspan");
  18.       var rowspan = cell.getAttribute("rowspan");
  19.       var cellValue = cell.innerText;
  20.       if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;
  22.       //Skip ranges
  23.       ranges.forEach(function(range) {
  24.         if (
  25.           R >= range.s.r &&
  26.           R <= range.e.r &&
  27.           outRow.length >= range.s.c &&
  28.           outRow.length <= range.e.c
  29.         ) {
  30.           for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
  31.         }
  32.       });
  34.       //Handle Row Span
  35.       if (rowspan || colspan) {
  36.         rowspan = rowspan || 1;
  37.         colspan = colspan || 1;
  38.         ranges.push({
  39.           s: {
  40.             r: R,
  41.             c: outRow.length
  42.           },
  43.           e: {
  44.             r: R + rowspan - 1,
  45.             c: outRow.length + colspan - 1
  46.           }
  47.         });
  48.       }
  50.       //Handle Value
  51.       outRow.push(cellValue !== "" ? cellValue : null);
  53.       //Handle Colspan
  54.       if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
  55.     }
  56.     out.push(outRow);
  57.   }
  58.   return [out, ranges];
  59. }
  61. function datenum(v, date1904) {
  62.   if (date1904) v += 1462;
  63.   var epoch = Date.parse(v);
  64.   return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
  65. }
  67. function sheet_from_array_of_arrays(data, opts) {
  68.   var ws = {};
  69.   var range = {
  70.     s: {
  71.       c: 10000000,
  72.       r: 10000000
  73.     },
  74.     e: {
  75.       c: 0,
  76.       r: 0
  77.     }
  78.   };
  79.   for (var R = 0; R != data.length; ++R) {
  80.     for (var C = 0; C != data[R].length; ++C) {
  81.       if (range.s.r > R) range.s.r = R;
  82.       if (range.s.c > C) range.s.c = C;
  83.       if (range.e.r < R) range.e.r = R;
  84.       if (range.e.c < C) range.e.c = C;
  85.       var cell = {
  86.         v: data[R][C]
  87.       };
  88.       if (cell.v == null) continue;
  89.       var cell_ref = XLSX.utils.encode_cell({
  90.         c: C,
  91.         r: R
  92.       });
  94.       if (typeof cell.v === "number") cell.t = "n";
  95.       else if (typeof cell.v === "boolean") cell.t = "b";
  96.       else if (cell.v instanceof Date) {
  97.         cell.t = "n";
  98.         cell.z = XLSX.SSF._table[14];
  99.         cell.v = datenum(cell.v);
  100.       } else cell.t = "s";
  102.       ws[cell_ref] = cell;
  103.     }
  104.   }
  105.   if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
  106.   return ws;
  107. }
  109. function Workbook() {
  110.   if (!(this instanceof Workbook)) return new Workbook();
  111.   this.SheetNames = [];
  112.   this.Sheets = {};
  113. }
  115. function s2ab(s) {
  116.   var buf = new ArrayBuffer(s.length);
  117.   var view = new Uint8Array(buf);
  118.   for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
  119.   return buf;
  120. }
  122. export function export_table_to_excel(id) {
  123.   var theTable = document.getElementById(id);
  124.   console.log("a");
  125.   var oo = generateArray(theTable);
  126.   var ranges = oo[1];
  128.   /* original data */
  129.   var data = oo[0];
  130.   var ws_name = "SheetJS";
  131.   console.log(data);
  133.   var wb = new Workbook(),
  134.     ws = sheet_from_array_of_arrays(data);
  136.   /* add ranges to worksheet */
  137.   // ws['!cols'] = ['apple', 'banan'];
  138.   ws["!merges"] = ranges;
  140.   /* add worksheet to workbook */
  141.   wb.SheetNames.push(ws_name);
  142.   wb.Sheets[ws_name] = ws;
  144.   var wbout = XLSX.write(wb, {
  145.     bookType: "xlsx",
  146.     bookSST: false,
  147.     type: "binary"
  148.   });
  150.   saveAs(
  151.     new Blob([s2ab(wbout)], {
  152.       type: "application/octet-stream"
  153.     }),
  154.     "test.xlsx"
  155.   );
  156. }
  158. function formatJson(jsonData) {
  159.   console.log(jsonData);
  160. }
  161. export function export_json_to_excel(th, jsonData, defaultTitle) {
  162.   /* original data */
  164.   var data = jsonData;
  165.   data.unshift(th);
  166.   var ws_name = "SheetJS";
  168.   var wb = new Workbook(),
  169.     ws = sheet_from_array_of_arrays(data);
  171.   /* add worksheet to workbook */
  172.   wb.SheetNames.push(ws_name);
  173.   wb.Sheets[ws_name] = ws;
  175.   var wbout = XLSX.write(wb, {
  176.     bookType: "xlsx",
  177.     bookSST: false,
  178.     type: "binary"
  179.   });
  180.   var title = defaultTitle || "列表";
  181.   saveAs(
  182.     new Blob([s2ab(wbout)], {
  183.       type: "application/octet-stream"
  184.     }),
  185.     title + ".xlsx"
  186.   );
  187. }

使用

（1） 如果项目中有很多地方用到导出数据成表格，则在 main.js中引入 Blob.js 和 Export2Excel.js

  1. //在main.js中
  2. // 注意引入 Blob.js 和 Export2Excel.js 的路径
  3. import Blob from '@/utils/Blob.js'    
  4. import Export2Excel from '@/utils/Export2Excel.js'

（2） 如果项目中只有一个地方用到，则可以在要使用到的页面里引入：

  1. //在main.js中
  2. // 注意引入 Blob.js 和 Export2Excel.js 的路径
  3. import Blob from '@/utils/Blob.js'    
  4. import Export2Excel from '@/utils/Export2Excel.js'
  5. //  导入excel插件，挂载到全局
  6. import XLSX from 'xlsx';
  7. Vue.prototype.XLSX = XLSX;

（3） 以下以在项目中全局使用为例（已在main.js中引入）：

  1. <template>
  2.   <div>
  3.     <el-button size="small" type="primary" @click="exportExcel" icon="el-icon-download">导出</el-button>   
  4.   </div>
  5. </template>
  7. <script>
  8. import {
  9.   addmaterial,
  10.   updatematerial,
  11.   getmaterials_by_cid_mid,
  12.   get_materials_page,
  13.   getall_citys,
  14.   getall_mtypes,
  15.   getall_stypes,
  16.   updatematerial_main,
  17. } from "../../api/api";
  18. export default {
  19.   data() {
  20.     return {
  21.       selectList: [],  // 选中的数据
  22.     }
  23.   },
  25.   methods: {
  26.     //选中某条数据时
  27.     handleSelectionChange(row) {
  28.       this.selectList = row;     // 将选中的数据给selectList
  29.     },
  30.    //定义导出Excel表格事件
  31.     exportExcel() {
  32.       if (this.selectList.length === 0) {
  33.         this.$message({
  34.           message: "请至少选择一条需要导出的数据",
  35.           type: "warning",
  36.         });
  37.         return;
  38.       }
  39.       this.$msgbox
  40.         .confirm("该操作将导出选中的数据，是否继续", "提示", {
  41.           confirmButtonText: "确定",
  42.           cancelButtonText: "取消",
  43.           type: "warning",
  44.         })
  45.         .then(() => {
  46.           //导出
  47.           require.ensure([], () => {
  48.             const { export_json_to_excel } = require("@/utils/Export2Excel"); //注意这个Export2Excel路径
  49.             const tableHeader = [
  50.               "地市",
  51.               "教材名称",
  52.               "教材类型",
  53.               "创建时间",
  54.               "描述",
  55.               "教材地址",
  56.             ]; // 设置Excel表格的表头内容
  57.             const header = [];
  58.             const filterVal = [
  59.               "province",
  60.               "mname",
  61.               "lname",
  62.               "createdate",
  63.               "memo",
  64.               "path",
  65.             ]; // 跟表格表头对应的绑定的prop 属性值
  66.             // let list = this.filterTableData(
  67.             //   JSON.parse(JSON.stringify(this.selectList))
  68.             // ); // 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
  69.             let data = this.formatJson(filterVal, list);
  70.             export_json_to_excel(tableHeader,header, data, "教材管理"); //最后一个是导出表格的名字
  71.           });
  72.         })
  73.         .catch(() => {});
  74.     },
  75.     formatJson(filterVal, Data) {
  76.       return Data.map(v => filterVal.map(j => v[j]))
  77.     },
  78.     //导出数据前对数据处理，变为想要的格式。
  79.     filterTableData(data) {
  80.       data.forEach((item) => {
  81.         item.country ? (item.province =item.province +"-" +item.city +"-" +item.area +"-" +
  82.               item.country)
  83.           : (item.province = item.province + "-" + item.city + "-" + item.area);
  84.         item.isdel ? (item.isdel = "已开启") : "已关闭";
  85.       });
  86.       return data;
  87.     },
  88. }
  89. </script>

（3）以上步骤就可以把table 表格数据导出为excel 了。