Use xlsx, estilo xlsx, plug-ins de proteção de arquivo em vue para imprimir arquivos Excel com dados brutos de tabela

 O arquivo Excel impresso é o seguinte: 

 1. Você precisa instalar o plug-in (o plug-in xlsx já possui a função de quebra de linha após o uso, se você não tiver requisitos de estilo para o arquivo excel exportado, não precisará baixar o plug-in estilo xlsx- em)

npm i -S xlsx

npm i -S file-saver

Escolha usar o estilo xlsx de acordo com a situação: se precisar alterar a cor de fundo da célula, adicionar uma borda etc.

npm i -S xlsx-style

Problemas encontrados durante a instalação:

Não é possível resolver './cptable' em 'xxx\node_modules_xlsx

Solução: adicione o seguinte código ao arquivo vue.config.js

  chainWebpack: (config) => {
    //忽略的打包文件
    config.externals({
      './cptable': 'var cptable'
    });
  },

2. Adicione o arquivo js da chave, adicionei-o na pasta de ferramentas

 O conteúdo completo do arquivo js é o seguinte:

Blob.js

/* 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));

 Export2Excel.js, se você tiver requisitos de estilo para o formulário impresso, precisará ler o código cuidadosamente para entender as propriedades do objeto de estilo do arquivo Excel. Recomenda-se a leitura deste artigo JavaScript, exporte o arquivo Excel e modifique o arquivo style_FEWY's blog-CSDN blog_js bubble sort

/* eslint-disable */

require('script-loader!file-saver');
require('./Blob.js');
require('script-loader!xlsx/dist/xlsx.core.min');
import XLSXS 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 = XLSXS.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'] = XLSXS.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);
    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 export_json_to_excel({
    multiHeader2 = [], // 第一行表头
    multiHeader = [], // 第二行表头
    header, // 第三行表头
    data,//传递的数据
    filename, //文件名
    merges = [], // 合并
    autoWidth = true,//用于设置列宽的
    bookType = 'xlsx'
} = {}) {
    /* original data */
    filename = filename || '列表';
    data = [...data]
    data.unshift(header);
    for (let i = multiHeader2.length - 1; i > -1; i--) {
        data.unshift(multiHeader2[i])
    }
    for (let i = multiHeader.length - 1; i > -1; i--) {
        data.unshift(multiHeader[i])
    }
    var ws_name = "SheetJS";
    var wb = new Workbook(),
        ws = sheet_from_array_of_arrays(data);
    let borderAll = { //单元格外侧框线
        top: {
            style: 'thin',//表示用细框线
        },
        bottom: {
            style: 'thin'
        },
        left: {
            style: 'thin'
        },
        right: {
            style: 'thin'
        }
    };
    for (let key in ws) {
        if (ws[key] instanceof Object) {
            ws[key].s = {
                name:'宋体',
                border: borderAll,
                alignment: {
                    horizontal: 'center', //水平居中对齐
                    vertical: 'center',//垂直居中
                    wrapText: 1,//自动换行
                },
                font: {
                    sz: 10,//单元格中字体的样式与颜色设置
                    color: {
                        rgb: '495060'
                    }
                },
                bold: true,
                numFmt: 0
            }
        }
    }
    let arr = ["A1", "B1", "C1", "D1", "E1", "F1", "G1", "H1", "I1", "J1", "K1", "L1", "M1", "N1", "O1", "P1", "Q1", "R1", "S1", "T1", "U1", "V1", "W1", "X1", "Y1", "Z1"];
    let arr1 = ["A2", "B2", "C2", "D2", "E2", "F2", "G2", "H2", "I2", "J2", "K2", "L2", "M2", "N2", "O2", "P2", "Q2", "R2", "S2", "T2", "U2", "V2", "W2", "X2", "Y2", "Z2"];
    arr.some(function (v) {//对单独的1  2 行进行样式修改，去掉框线，放大字体
        let a = merges[0].split(':')
        if (v == a[1]) {
            ws[v].s.border = {}
          return true;
        }else {
            ws[v].s.border = {}
        }
        ws[v].s.font= {
            sz: 14,//单元格中字体的样式与颜色设置
            color: {
                rgb: '495060'
            },
            bold: true,
        }
      })
      arr1.some(function (v) {
        if (ws[v]) {
            ws[v].s.border = {}
        }
      })
    if (merges.length > 0) {
        if (!ws['!merges']) ws['!merges'] = [];
        merges.forEach(item => {
            ws['!merges'].push(XLSXS.utils.decode_range(item))
        })
    }
    if (autoWidth) {
        let colWidths = [];
        // 计算每一列的所有单元格宽度
        // 先遍历行
        data.forEach((row) => {
            // 列序号
            let index = 0
            // 遍历列
            for (const key in row) {
                if (colWidths[index] == null) colWidths[index] = []
                switch (typeof row[key]) {
                    case 'string':
                    case 'number':
                    case 'boolean':                     colWidths[index].push(getCellWidth(row[key]))
                        break
                    case 'object':
                    case 'function':
                        colWidths[index].push(0)
                        break
                }
                index++
            }
        })
        ws['!cols'] = [];
        colWidths.forEach((widths, index) => {
            // 计算列头的宽度
            widths.push(getCellWidth(header[index]))
            // 设置最大值为列宽
            ws['!cols'].push({
                wch: Math.max(...widths)
            })
        })
    }
    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
    var wbout = XLSXS.write(wb, {
        bookType: bookType,
        bookSST: false,
        type: 'binary'
    });
    saveAs(new Blob([s2ab(wbout)], {
        type: "application/octet-stream"
    }), `${filename}.${bookType}`);
}
export function getCellWidth(value) {
    if (value == null) {
        return 10
    } else if (value.toString().charCodeAt(0) > 255) {
        // 判断是否包含中文
        let length = value.toString().length * 2
        if (length > 60) {
            length = length - 40 
//这里的宽度可以自己设定，在前面设置wrapText: 1可以在单元格内换行
        }
        return length
    } else {
        return value.toString().length * 1.2
    }
}

Se você não precisar operar o estilo, poderá substituir o método no arquivo Export2Excel.js pelo seguinte

// 对此方法进行修改，如下：
 export function export_json_to_excel({
     multiHeader2 = [],   // 第一行表头
    multiHeader = [], // 第二行表头
     header,  // 第三行表头
     data,
    filename, //文件名
     merges = [], // 合并
    autoWidth = true,
     bookType = 'xlsx'
 } = {}) {
     /* original data */
     filename = filename || '列表';
     data = [...data]
     data.unshift(header);

     for (let i = multiHeader2.length - 1; i > -1; i--) {
         data.unshift(multiHeader2[i])
     }

    for (let i = multiHeader.length - 1; i > -1; i--) {
         data.unshift(multiHeader[i])
     }

     var ws_name = "SheetJS";
     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))
        })
    }

    if (autoWidth) {
         /*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) {
                 return {
                     'wch': 10
               };
           }
             /*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
                 };
             }
         }))
         /*以第一行为初始值*/
         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 wbout = XLSX.write(wb, {
         bookType: bookType,
         bookSST: false,
        type: 'binary'
     });
     saveAs(new Blob([s2ab(wbout)], {
         type: "application/octet-stream"
     }), `${filename}.${bookType}`);
 }

3. Para uso na página, o formato necessário para algumas variáveis-chave é colado no final do artigo

    //html部分
<el-button
            size="small"
            icon="el-icon-download"
            @click="exportDataEvent"
            circle
          >
          </el-button>
//js部分
    exportDataEvent() {
      this.handleExportMarketingList(information,tableColumn);},

// 导出方法
    handleExportMarketingList(information, optionColumnList) {
      import("_b/pages/utils/vendor/Export2Excel.js").then((excel) => {//根据实际路径进行修改
        let tHeader = [];
        optionColumnList.forEach((ele) => {
          tHeader.push(ele.title);
        });
        let multiHeader = [[]];
        tHeader.forEach((ele, index) => {
          index === 0
            ? multiHeader[0].push("汇总表")
            : multiHeader[0].push("");
        });
        let multiHeader2 = [[]];
        tHeader.forEach((ele, index) => {
          index === 0
            ? multiHeader2[0].push(`名称：${this.proName}`)
            : multiHeader2[0].push("");
        });
        multiHeader2[0].splice(
          multiHeader2[0].length - 1,
          1,
          `编号：${this.proCode}`
        );
        const filterVal = optionColumnList;
        let data = information.map((v) => filterVal.map((j) => v[j.field]));
        const englishWordList = [
          "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",
        ];
        // 进行所有表头的单元格合并
        let typeList = [];
        data.forEach((ele) => {
          typeList.push(ele[0]);
        });
        data = data.concat(this.footerDataList);
        let merges = [
          `A1:${englishWordList[tHeader.length - 1]}1`,
          `A2:${englishWordList[tHeader.length - 2]}2`,
        ];
        for (let i = 1; merges.length < (data.length - 4) / 2 + 2; i += 2) {
          merges.push(`A${3 + i}:A${4 + i}`);
        }
        merges.push(`A${data.length}:B${data.length}`);
        merges.push(`A${data.length + 1}:B${data.length + 1}`);
        merges.push(`A${data.length + 2}:B${data.length + 2}`);
        merges.push(`A${data.length + 3}:B${data.length + 3}`);
        excel.export_json_to_excel({
          multiHeader,
          multiHeader2,
          header: tHeader,
          data,
          filename: "汇总",
          merges,
        });
      });
    },