vue导出excel数据表格功能

• 2019 年 10 月 6 日
• 筆記

前端工作量最多的就是需求，需求就是一直在变，比如当前端数据写完之后，需要用Excel把数据下载出来。

第一步安装依赖包,需要把代码下载你的项目当中

　　cnpm install  file-saver

　　cnpm install xlsx

       cnpm install script-loader

第二步在项目中创建一个新的文件夹用于存放Blob和Export2Excel两个js文件

第三步在你那个组件中使用

tHeader:标题

filterVal：字段名

tableData:前端请求的数据

exportToExcel() {          //excel数据导出          require.ensure([], () => {              const {                  export_json_to_excel              } = require('../../assets/js/Export2Excel');              const tHeader = ['序号','省份', '投资总额', '收益总额', '主要投资项目','投资周期', '投资人数', '投资年变化率','备注'];              const filterVal = ['index','provinces', 'orderMoney', 'incomeMoney', 'payType','orderPeriod', 'orderPersonConunt', 'orderYearRate', 'remarks'];              const list = this.tableData;              const data = this.formatJson(filterVal, list);              export_json_to_excel(tHeader, data, '列表excel');          })      },      formatJson(filterVal, jsonData) {          return jsonData.map(v => filterVal.map(j => v[j]))      }

附录：

需要把这个两个文件复制到自己的目录中

Export2Excel.js文件

/* eslint-disable */  require('script-loader!file-saver');  // require('script-loader!src/vendor/Blob');  require('script-loader!../../assets/js/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")  }

Blob.js文件

/* 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(/^[objects(.*)]$/)[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  ));