Java使用POI导出Excel(二)：多个sheet

        <!--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>

 package com.***.excel;
 
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.springframework.http.MediaType;
 
import javax.servlet.http.HttpServletResponse;
import java.net.URLEncoder;
import java.util.List;
 
/**
 * @description: excel导出多个sheet工具类
 * @author: ***
 * @date: 2022/9/15
 */
public class ExportSheetUtil {
 
    /**
     * 拆解并导出多重Excel
     */
    public static void exportManySheetExcel(String fileName, List<ExcelSheet> mysheets, HttpServletResponse response) {
        //创建工作薄
        HSSFWorkbook wb = new HSSFWorkbook();
        //表头样式
        HSSFCellStyle style = wb.createCellStyle();
        // 垂直
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        // 水平
        style.setAlignment(HorizontalAlignment.CENTER);
        //字体样式
        HSSFFont fontStyle = wb.createFont();
        fontStyle.setFontName("微软雅黑");
        fontStyle.setFontHeightInPoints((short) 12);
        style.setFont(fontStyle);
        for (ExcelSheet excel : mysheets) {
            //新建一个sheet
            //获取该sheet名称
            HSSFSheet sheet = wb.createSheet(excel.getFileName());
            //获取sheet的标题名
            String[] handers = excel.getHanders();
            //第一个sheet的第一行为标题
            HSSFRow rowFirst = sheet.createRow(0);
            //写标题
            for (int i = 0; i < handers.length; i++) {
                //获取第一行的每个单元格
                HSSFCell cell = rowFirst.createCell(i);
                //往单元格里写数据
                cell.setCellValue(handers[i]);
                //加样式
                cell.setCellStyle(style);
                //设置每列的列宽
                sheet.setColumnWidth(i, 4000);
            }
            //写数据集
            List<String[]> dataset = excel.getDataset();
            for (int i = 0; i < dataset.size(); i++) {
                //获取该对象
                String[] data = dataset.get(i);
                //创建数据行
                HSSFRow row = sheet.createRow(i + 1);
                for (int j = 0; j < data.length; j++) {
                    //设置对应单元格的值
                    row.createCell(j).setCellValue(data[j]);
                }
            }
        }
 
        // 下载文件谷歌文件名会乱码,用IE
        try {
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xlsx", "utf-8"));
            response.setHeader("Cache-Control", "No-cache");
            response.flushBuffer();
            wb.write(response.getOutputStream());
            wb.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
}

 package com.***.excel;
 
import lombok.Data;
 
import java.util.List;
 
/**
 * @description: 导出多个sheet表
 * @author: ***
 * @date: 2022/9/15
 */
@Data
public class ExcelSheet {
 
    /*** sheet的名称*/
    private String fileName;
 
    /*** sheet里的标题*/
    private String[] handers;
 
    /*** sheet里的数据集*/
    private List<String[]> dataset;
 
    public ExcelSheet(String fileName, String[] handers, List<String[]> dataset) {
        this.fileName = fileName;
        this.handers = handers;
        this.dataset = dataset;
    }
 
}

    /*** 导出开票及运单信息*/
    ExportInvoiceAndBillVo exportInvoiceAndBillInfo(InvoiceReviewListDto dto);

 package com.***.vo.invoicereview;
 
import lombok.Data;
 
import java.io.Serializable;
import java.util.List;
 
/**
 * @description: 导出开票和运单信息Vo
 * @author: ***
 * @date: 2022/9/19
 */
@Data
public class ExportInvoiceAndBillVo implements Serializable {
 
    /*** 开票信息*/
    private List<String[]> invoiceList;
 
    /*** 运单信息*/
    private List<String[]> billList;
 
}

     @Override
    public ExportInvoiceAndBillVo exportInvoiceAndBillInfo(InvoiceReviewListDto dto) {
        ExportInvoiceAndBillVo invoiceAndBill = new ExportInvoiceAndBillVo();
        // 查询需要导出的开票信息
        PageInfo<InvoiceReviewListVo> pageInfo = queryInvoiceReviewList(dto);
        List<InvoiceReviewListVo> invoiceList = pageInfo.getList();
        if (invoiceList.size() > 10000) {
            throw new ServiceException("开票数据过多,请分批次导出");
        }
        // 查询需要导出的车运运单信息
        List<Long> invoiceIdList = invoiceList.stream().map(InvoiceReviewListVo::getInvoiceId).collect(Collectors.toList());
        List<ExportBillVo> billList = getBillInfo(invoiceIdList);
        if (billList.size() > 10000) {
            throw new ServiceException("运单数据过多,请分批次导出");
        }
        // 将表1 表2的数据 放入定义的对象Vo中
        invoiceAndBill.setInvoiceList(getInvoiceDataList(invoiceList));
        invoiceAndBill.setBillList(getBillDataList(billList));
        return invoiceAndBill;
    }

     /**
     * 导出开票和运单信息
     */
    @Log
    @PostMapping("/exportInvoiceAndBillInfo")
    public void exportInvoiceAndBillInfo(@RequestBody InvoiceReviewListDto dto, HttpServletResponse response) {
        ExportInvoiceAndBillVo invoiceAndBillVo = invoiceFacadeService.exportInvoiceAndBillInfo(dto);
        //设置sheet的表头与表名
        String[] invoiceSheetHead = {"开票编号", "票号", "公司名称", "收票方名称", "结算类型", "纳税识别码", "收票联系人", "联系人电话", "运单总金额(元)", "含税总金额(元)", "开票状态", "提交开票时间", "运营审核时间", "运营审核人", "财务审核时间", "财务审核人", "开票完成时间", "冲销操作人", "冲销时间"};
        String[] billSheetHead = {"开票编号", "运单号", "发货地", "收货地", "司机", "司机电话", "货物名称", "货物数量", "单位", "货物重量(吨)", "运单状态", "运单金额(元)", "含税金额(元)"};
        ExcelSheet invoiceExcel = new ExcelSheet("开票信息", invoiceSheetHead, invoiceAndBillVo.getInvoiceList());
        ExcelSheet billExcel = new ExcelSheet("运单信息", billSheetHead, invoiceAndBillVo.getBillList());
        List<ExcelSheet> mysheet = new ArrayList<>();
        mysheet.add(invoiceExcel);
        mysheet.add(billExcel);
        ExportSheetUtil.exportManySheetExcel("开票及运单信息", mysheet, response);
    }