一、pom引用

pom文件中，添加以下依赖

        <!--Excel工具-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>5.2.2</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>5.2.2</version>
            <scope>compile</scope>
        </dependency>

二、工具类util

1.ExportExcelZip

package com.***.excel;

import com.***.ServiceException;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * @description: 导出多个Excel 压缩成ZIP
 */

public class ExportExcelZip {

    /**
     * 以压缩包的方式下载excel
     *
     * @param response    响应
     * @param workbookMap
     * @param zipName     压缩包名称
     */
    public static void downloadExcelForZip(HttpServletResponse response, Map<String, XSSFWorkbook> workbookMap, String zipName) throws IOException {
        // 文件名外的双引号处理firefox的空格截断问题
        ZipOutputStream out = null;
        try {
            response.setContentType("application/*");
            response.setHeader("content-disposition", "attachment;filename=" + new String(zipName.getBytes("gb2312"), "ISO8859-1"));
            response.setCharacterEncoding("UTF-8");
            out = new ZipOutputStream(response.getOutputStream());
            for (String fileName : workbookMap.keySet()) {
                XSSFWorkbook workbook = workbookMap.get(fileName);
                ZipEntry entry = new ZipEntry(fileName);
                out.putNextEntry(entry);
                // 这里讲一下，workBook.write会指定关闭数据流，如果这里直接用workbook.write(out)，
                // 下次就会抛出out已被关闭的异常，所有用ByteArrayOutputStream来拷贝一下。
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                workbook.write(bos);
                bos.writeTo(out);
                // 关闭输入流
                out.closeEntry();
            }
            out.flush();

        } catch (IOException e) {
            throw new ServiceException("下载文件异常"+e.getMessage(), 9000);
        } finally {
            if (out != null) {
                out.close();
            }

        }
    }

}

三、相关业务代码

1.service层

    /*** 清单导出*/
    Map<String, XSSFWorkbook> exportSales(ExportSalesDto dto);

2.impl实现类

@Override
    public Map<String, XSSFWorkbook> exportSales(ExportSalesDto dto) {
        List<ExportSalesVo> list = new ArrayList<>();
        ExportSalesVo exportSalesVo = new ExportSalesVo();
        // 表格title（表格title需要根据自己的项目需求进行修改）
        List<String> titleList = Arrays.asList("单据编号", "单据序号", "客户名称", "客户税号", "客户地址电话", "客户银行账号", "客户联系方式", "商品名称", "规格型号", "计量单位", "数量", "单价", "金额", "税率", "商品编码", "使用优惠政策", "优惠政策", "零税率标识", "自行编码", "备注", "开票人", "收款人", "复核人", "折扣金额", "折扣汇总金额", "扣除额", "成品油");
        exportSalesVo.setTitleList(titleList);
        // 填充清单数据
        List<SalesListVo> salesList = invoiceMapper.queryInventory(dto.getInvoiceId());
        for (SalesListVo vo : salesList) {
            vo.setInvoiceNo("3000001");
            vo.setInvoiceSerialNum("");
            vo.setCustomerMobile("");
            vo.setUnit("吨");
            // 计算货物单价：金额/数量
            vo.setPrice(vo.getTransportMoneyReal().divide(vo.getInvoiceNum(), 5, RoundingMode.HALF_UP));
            vo.setRate(new BigDecimal("0.09"));
            vo.setGoodsCode("");
            vo.setIsDiscount("");
            vo.setDiscount("");
            vo.setIsZeroRate("");
            vo.setCustomCode("");
            vo.setDrawerName("");
            vo.setPayeeName("");
            vo.setReviewName("");
            vo.setDiscountAmount("");
            vo.setDiscountTotalAmount("");
            vo.setDeductionAmount("");
            vo.setRefinedOil("");
        }
        exportSalesVo.setDataList(salesList);
        list.add(exportSalesVo);

        Map<String, XSSFWorkbook> workbookMap = new HashMap<>();
        for (ExportSalesVo vo : list) {
            XSSFWorkbook wk = new XSSFWorkbook();
            XSSFSheet sheet = wk.createSheet("清单");
            XSSFRow row = sheet.createRow(0);
            // 添加excel title
            XSSFCell cell;
            for (int t = 0, size = vo.getTitleList().size(); t < size; t++) {
                cell = row.createCell(t);
                cell.setCellValue(vo.getTitleList().get(t));
            }
            // 在sheet中再添加1行，存放数据
            // 遍历将数据写入Excel中
            for (int t = 0, size = vo.getDataList().size(); t < size; t++) {
                XSSFRow row1 = sheet.createRow(t + 1);
                SalesListVo salesListVo = vo.getDataList().get(t);
                Field[] declaredFields = salesListVo.getClass().getDeclaredFields();
                for (int j = 0; j < declaredFields.length; j++) {
                    cell = row1.createCell(j);
                    Field field = declaredFields[j];
                    field.setAccessible(true);
                    String value = "";
                    try {
                        value = field.get(salesListVo).toString();
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    }
                    cell.setCellValue(value);
                }
            }
            workbookMap.put("清单.xlsx", wk);
        }
        return workbookMap;
    }

3.controller层

controller层的代码需要注意的是：

1.因为导出Excel一般都是通过浏览器进行下载的，所以入参中需要加入HttpServletResponse

2.调用封装的工具类ExportExcelZip中的downloadExcelForZip方法就可以了

    /**
     * 导出销货清单（压缩包）
     */
    @GetMapping("/exportSales")
    public void exportSales(@Valid ExportSalesDto dto, HttpServletResponse response) {
        log.info("导出清单，入参：{}", dto);
        Map<String, XSSFWorkbook> workbookMap = invoiceReviewService.exportSales(dto);
        try {
            ExportExcelZip.downloadExcelForZip(response, workbookMap, "sales.zip");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

PS：我这边只是提供了导出zip的demo，里面的表格title、数据等需要根据自己的项目需求替换成自己的代码，切记！！！

最终导出的效果：