刚开始实现excel导出是用的springboot+vue的方式实现，后来发现可能是系统的原因（同一套代码其他系统没事，就这个有事，无语，坑了我很长时间），后台老是乱码，于是索性就用纯vue写了导出

springboot+vue导出

后台控制层

 @ApiOperation(value="导出", notes="导出记录")
    @GetMapping(value = "/exportExcelAll", produces = "application/octet-stream")
    public void exportExcel(@Validated StoreOrderTwo storeOrderTwo, HttpServletResponse response) {
            storeOrderService.exportExcelAll(storeOrderTwo,response);
    }

后台服务层

/**
     * 导出文件
     * @return 返回数据
     */
    public void exportExcelAll(StoreOrderTwo storeOrderTwo, HttpServletResponse response) {
            //时间处理
            dateLimitUtilVo dateLimitUtilVo = DateUtil.getDateLimit(storeOrderTwo.getDateLimit());
            storeOrderTwo.setStartTime(dateLimitUtilVo.getStartTime());
            storeOrderTwo.setEndTime(dateLimitUtilVo.getEndTime());
            SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            //要导出的数据
            List<StoreOrderTwo> records = dao.selectOrderList(storeOrderTwo);
            HSSFWorkbook wb = new HSSFWorkbook();
            HSSFSheet sheet = wb.createSheet("ORDER_COLLECT");
            int columnIndex = 0;

            HSSFRow row = sheet.createRow(0);
            row.setHeight((short) (22.50 * 20));//设置行高
            row.createCell(columnIndex).setCellValue("序号");
            row.createCell(++columnIndex).setCellValue("订单编号");
            row.createCell(++columnIndex).setCellValue("下单时间");
            row.createCell(++columnIndex).setCellValue("订单类型");
            row.createCell(++columnIndex).setCellValue("缴费状态");
            row.createCell(++columnIndex).setCellValue("实际支付");
            row.createCell(++columnIndex).setCellValue("实际成本");
            row.createCell(++columnIndex).setCellValue("业务状态");
            row.createCell(++columnIndex).setCellValue("客户");
            row.createCell(++columnIndex).setCellValue("客户公司");
            row.createCell(++columnIndex).setCellValue("业务类型");
            row.createCell(++columnIndex).setCellValue("业务商品");
            row.createCell(++columnIndex).setCellValue("所属公司");
            row.createCell(++columnIndex).setCellValue("跟进业务员");
            for (int i = 0; i < records.size(); i++) {
                row = sheet.createRow(i + 1);
                StoreOrderTwo entity = records.get(i);
                columnIndex = 0;
                row.createCell(columnIndex).setCellValue(i + 1);
                row.createCell(++columnIndex).setCellValue(entity.getOrderId());
                row.createCell(++columnIndex).setCellValue(sd.format(entity.getCreateTime()));
                if("1".equals(entity.getOrderType())){
                    row.createCell(++columnIndex).setCellValue("正常订单");
                }else {
                    row.createCell(++columnIndex).setCellValue("退款订单");
                }
                if("1".equals(entity.getPaid())){
                    row.createCell(++columnIndex).setCellValue("已缴清");
                }else {
                    row.createCell(++columnIndex).setCellValue("未缴清");
                }
                row.createCell(++columnIndex).setCellValue(entity.getTotalPrice().toString());
                row.createCell(++columnIndex).setCellValue(entity.getBusinessCost().toString());
                if(0 == entity.getStatus()){
                    row.createCell(++columnIndex).setCellValue("待办理");
                }else if(1 == entity.getStatus()){
                    row.createCell(++columnIndex).setCellValue("办理中");
                }else if(2 == entity.getStatus()){
                    row.createCell(++columnIndex).setCellValue("已验收");
                } else {
                    row.createCell(++columnIndex).setCellValue("已办结");
                }
                row.createCell(++columnIndex).setCellValue(entity.getCustomerWxName()+"|"+entity.getCustomerName()+"|"+entity.getCustomerPhone());
                row.createCell(++columnIndex).setCellValue(entity.getCustomerCompanyNameOne());
                row.createCell(++columnIndex).setCellValue(entity.getBusinessType());
                row.createCell(++columnIndex).setCellValue(entity.getProductName());
                row.createCell(++columnIndex).setCellValue(entity.getCompanyName());
                row.createCell(++columnIndex).setCellValue(entity.getSalesmanName()+"|"+entity.getSalesmanPhone());
            }
            sheet.setDefaultRowHeight((short) (16.5 * 20));//列宽自适应
             for (int i = 0; i <= 14; i++) {
                 sheet.autoSizeColumn(i);
             }
        String bootPath = "D:\\ORDER\\EXCEL_COLLECT\\";
        File folder = new File(bootPath);
        if(!folder.exists()) {
            folder.mkdirs();
        }

        String filePath = bootPath + "订单汇总.xlsx";
        OutputStream outputStream = null;
        FileOutputStream output = null;
        try {
            String fileName = "订单汇总.xlsx";
            response.setCharacterEncoding("UTF-8");
            response.setContentType("application/x-msdownload;");
            response.setHeader("Content-disposition", "attachment; filename=".concat(String.valueOf(URLEncoder.encode(fileName, "UTF-8"))));
            outputStream = response.getOutputStream();
            output = new FileOutputStream(filePath);
            wb.write(outputStream);
            wb.write(output);
            outputStream.flush();
            output.flush();
//            ExcelUtils.downloadFiles(filePath, response);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(output!=null) {
                try {
                    output.close();
                    outputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

这里我为了测试是不是乱码，就多写了一段往本地导出文件的代码，就是String bootPath = “D:\ORDER\EXCEL_COLLECT\”;这段，你们自己写的时候可以把这段代码去掉；经过测试发现本地导出的excel不乱码，但是传给response的excel乱码了，我就很懵，为啥本地流没事，把IO流传给response就有问题，而且在别的框架没事，估计是框架哪里冲突了，但是很遗憾我没找出来，实在没时间找了

配套的前端vue

/**
     * 导出全部按钮点击事件
    */
    exportExcelAll(){
       var url = "http://localhost:8081/websocket/common/exportExcelAll";
      axios({
          method: 'get',
          url: url,
          params: this.tableFrom,
          responseType: 'blob'
      }).then(response=>{
        const content = response.data
        const blob = new Blob([content], { type: 'application/vnd.ms-excel' })
        const fileName = '订单汇总.xlsx'
        if ('download' in document.createElement('a')) { // 非IE下载
          const elink = document.createElement('a')
          elink.download = fileName
          elink.style.display = 'none'
          elink.href = URL.createObjectURL(blob)
          document.body.appendChild(elink)
          elink.click()
          URL.revokeObjectURL(elink.href) // 释放URL 对象
          document.body.removeChild(elink)
        } else { // IE10+下载
          navigator.msSaveBlob(blob, fileName)
        }
      }).catch(err=>{
          console.log(err)
      })
    },

如果想要调乱码的话，正常情况后台response只能调整文件名的编码，也就是只有response.setHeader会生效，像response.setCharacterEncoding和response.setContentType是不生效的，想调整文件内容编码只能在前端调整，很无语；前端想调整编码的话，还有很多不太容易踩进去的坑，很不幸，我全踩了。首先你要想要调整编码格式你需要用blob来调整，也就是设 responseType: ‘blob’，但是！想要blob生效的话你需要直接在axios设置，不能封装的太深，很不幸这个框架封的太深了我只能不用框架封装的request，自己写了手动用原生axios写了，如果你觉得这样很low的话，你可以封装的时候留一个config参数来接收responseType: 'blob’就行，大概这样，我就不多说了，你们自己写就行了
还有一个坑点，就是想要blob生效，你不能安装mock，记住一定 不能，安了的小伙伴赶紧去掉吧，去掉很简单，自行度娘吧。正常情况这样就行了，但是很不幸我不正常，于是我就想出了第二套方法，纯前端写，做了一个全栈来说这都是毛毛雨，当然数据处理推荐后端，实在没办法再前端吧，基本现在我都是一个人写前后端，所以有的时候前端处理数据，当然这个不推荐，一个是不安全，一个是你要是纯后端和前端对接的话，前端会骂娘的。

纯前端vue导出文件

首先你需要安装三个插件

npm install -S file-saver xlsx
npm install -D script-loader

然后你在和view同级的目录建一个vendor文件夹，你再创建两个js文件Blob.js和Export2Excel.js文件

Blob.js

/* eslint-disable */
/* Blob.js
 * A Blob implementation.
 * 2022-04-08
 *
 * 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

/* eslint-disable */
require('script-loader!file-saver');
// require('script-loader!vendor/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 = "ORDER_COLLECT";
    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 = "ORDER_COLLECT";

    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")
}

接下来写方法就行了

exportExcelAll() {
      selectAllOrderApi(this.tableFrom).then(res => {
          this.orderList = res || [];
            require.ensure([], () => {
            const { export_json_to_excel } = require('../../vendor/Export2Excel');
            const tHeader = ['序号', '订单编号', '下单时间', '订单类型', '缴费状态','实际支付', '实际成本', '业务状态', '支付方式', '客户', '客户公司','业务类型', '业务商品', '所属公司', '跟进业务员'];
            const filterVal = ['sort', 'orderId', 'createTime', 'orderTypeName', 'paid', 'totalPrice', 'businessCost', 'status', 'payTypeStr', 'customerInfo', 'customerCompanyNameOne','businessType', 'productName', 'companyName', 'salesmanInfo'];
            const list = this.orderList;
            const data = this.formatJson(filterVal, list);
            export_json_to_excel(tHeader, data, 'EXCEL_ORDER_COLLECT');
          })
        }).catch(() => {
          this.listLoading = false
        })
  },
  formatJson(filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]))
  },

来看下效果吧


可以看出已经根据我们设置的格式导出了