Java使用POI匯出Excel(二)：多個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匯出多個sheet工具類
 * @author: ***
 * @date: 2022/9/15
 */
public class ExportSheetUtil {
 
    /**
     * 拆解並匯出多重Excel
     */
    public static void exportManySheetExcel(String fileName, List<ExcelSheet> mysheets, HttpServletResponse response) {
        //建立工作薄
        HSSFWorkbook wb = new HSSFWorkbook();
        //表頭樣式
        HSSFCellStyle style = wb.createCellStyle();
        // 垂直
        style.setVerticalAlignment(VerticalAlignment.CENTER);
        // 水平
        style.setAlignment(HorizontalAlignment.CENTER);
        //字型樣式
        HSSFFont fontStyle = wb.createFont();
        fontStyle.setFontName("微軟雅黑");
        fontStyle.setFontHeightInPoints((short) 12);
        style.setFont(fontStyle);
        for (ExcelSheet excel : mysheets) {
            //新建一個sheet
            //獲取該sheet名稱
            HSSFSheet sheet = wb.createSheet(excel.getFileName());
            //獲取sheet的標題名
            String[] handers = excel.getHanders();
            //第一個sheet的第一行為標題
            HSSFRow rowFirst = sheet.createRow(0);
            //寫標題
            for (int i = 0; i < handers.length; i++) {
                //獲取第一行的每個單元格
                HSSFCell cell = rowFirst.createCell(i);
                //往單元格里寫資料
                cell.setCellValue(handers[i]);
                //加樣式
                cell.setCellStyle(style);
                //設定每列的列寬
                sheet.setColumnWidth(i, 4000);
            }
            //寫資料集
            List<String[]> dataset = excel.getDataset();
            for (int i = 0; i < dataset.size(); i++) {
                //獲取該物件
                String[] data = dataset.get(i);
                //建立資料行
                HSSFRow row = sheet.createRow(i + 1);
                for (int j = 0; j < data.length; j++) {
                    //設定對應單元格的值
                    row.createCell(j).setCellValue(data[j]);
                }
            }
        }
 
        // 下載檔案谷歌檔名會亂碼,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: 匯出多個sheet表
 * @author: ***
 * @date: 2022/9/15
 */
@Data
public class ExcelSheet {
 
    /*** sheet的名稱*/
    private String fileName;
 
    /*** sheet裡的標題*/
    private String[] handers;
 
    /*** sheet裡的資料集*/
    private List<String[]> dataset;
 
    public ExcelSheet(String fileName, String[] handers, List<String[]> dataset) {
        this.fileName = fileName;
        this.handers = handers;
        this.dataset = dataset;
    }
 
}

    /*** 匯出開票及運單資訊*/
    ExportInvoiceAndBillVo exportInvoiceAndBillInfo(InvoiceReviewListDto dto);

 package com.***.vo.invoicereview;
 
import lombok.Data;
 
import java.io.Serializable;
import java.util.List;
 
/**
 * @description: 匯出開票和運單資訊Vo
 * @author: ***
 * @date: 2022/9/19
 */
@Data
public class ExportInvoiceAndBillVo implements Serializable {
 
    /*** 開票資訊*/
    private List<String[]> invoiceList;
 
    /*** 運單資訊*/
    private List<String[]> billList;
 
}

     @Override
    public ExportInvoiceAndBillVo exportInvoiceAndBillInfo(InvoiceReviewListDto dto) {
        ExportInvoiceAndBillVo invoiceAndBill = new ExportInvoiceAndBillVo();
        // 查詢需要匯出的開票資訊
        PageInfo<InvoiceReviewListVo> pageInfo = queryInvoiceReviewList(dto);
        List<InvoiceReviewListVo> invoiceList = pageInfo.getList();
        if (invoiceList.size() > 10000) {
            throw new ServiceException("開票資料過多,請分批次匯出");
        }
        // 查詢需要匯出的車運運單資訊
        List<Long> invoiceIdList = invoiceList.stream().map(InvoiceReviewListVo::getInvoiceId).collect(Collectors.toList());
        List<ExportBillVo> billList = getBillInfo(invoiceIdList);
        if (billList.size() > 10000) {
            throw new ServiceException("運單資料過多,請分批次匯出");
        }
        // 將表1 表2的資料 放入定義的物件Vo中
        invoiceAndBill.setInvoiceList(getInvoiceDataList(invoiceList));
        invoiceAndBill.setBillList(getBillDataList(billList));
        return invoiceAndBill;
    }

     /**
     * 匯出開票和運單資訊
     */
    @Log
    @PostMapping("/exportInvoiceAndBillInfo")
    public void exportInvoiceAndBillInfo(@RequestBody InvoiceReviewListDto dto, HttpServletResponse response) {
        ExportInvoiceAndBillVo invoiceAndBillVo = invoiceFacadeService.exportInvoiceAndBillInfo(dto);
        //設定sheet的表頭與表名
        String[] invoiceSheetHead = {"開票編號", "票號", "公司名稱", "收票方名稱", "結算型別", "納稅識別碼", "收票聯絡人", "聯絡人電話", "運單總金額(元)", "含稅總金額(元)", "開票狀態", "提交開票時間", "運營稽核時間", "運營稽核人", "財務稽核時間", "財務稽核人", "開票完成時間", "沖銷操作人", "沖銷時間"};
        String[] billSheetHead = {"開票編號", "運單號", "發貨地", "收貨地", "司機", "司機電話", "貨物名稱", "貨物數量", "單位", "貨物重量(噸)", "運單狀態", "運單金額(元)", "含稅金額(元)"};
        ExcelSheet invoiceExcel = new ExcelSheet("開票資訊", invoiceSheetHead, invoiceAndBillVo.getInvoiceList());
        ExcelSheet billExcel = new ExcelSheet("運單資訊", billSheetHead, invoiceAndBillVo.getBillList());
        List<ExcelSheet> mysheet = new ArrayList<>();
        mysheet.add(invoiceExcel);
        mysheet.add(billExcel);
        ExportSheetUtil.exportManySheetExcel("開票及運單資訊", mysheet, response);
    }