Java使用itext生成復(fù)雜數(shù)據(jù)的pdf的示例代碼

更新時(shí)間：2024年12月15日 10:49:19 作者：Java小王子呀

Apache iText 是一個開源 Java 庫,支持 PDF 文檔的開發(fā)和轉(zhuǎn)換,在本教程中,我們將學(xué)習(xí)如何使用 iText 開發(fā)可以創(chuàng)建、轉(zhuǎn)換和操作 PDF 文檔的 Java 程序,感興趣的小伙伴跟著小編一起來看看吧

首先，什么是Itext

Apache iText 是一個開源 Java 庫，支持 PDF 文檔的開發(fā)和轉(zhuǎn)換。
在本教程中，我們將學(xué)習(xí)如何使用 iText 開發(fā)可以創(chuàng)建、轉(zhuǎn)換和操作 PDF 文檔的 Java 程序。
Itext目前遵從AGPL開源協(xié)議，AGPL 可以說是最嚴(yán)格的 GPL 了，強(qiáng)傳染性，即使是 RPC 調(diào)用也會被感染，不發(fā)行軟件而是作為 web 服務(wù)對外提供也必須開放源代碼
目前Itext有很多product開始收費(fèi)，但你所需的功能基本上open source都能滿足

特點(diǎn)：

以下是 iText 庫的顯著特點(diǎn) −

Interactive − iText 為你提供類（API）來生成交互式 PDF 文檔。使用這些，你可以創(chuàng)建地圖和書籍。
Adding bookmarks, page numbers, etc − 使用 iText，你可以添加書簽、頁碼和水印。
Split & Merge − 使用 iText，你可以將現(xiàn)有的 PDF 拆分為多個 PDF，還可以向其中添加/連接其他頁面。
Fill Forms − 使用 iText，你可以在 PDF 文檔中填寫交互式表單。
Save as Image − 使用 iText，你可以將 PDF 保存為圖像文件，例如 PNG 或 JPEG。
Canvas − iText 庫為您提供了一個 Canvas 類，你可以使用它在 PDF 文檔上繪制各種幾何形狀，如圓形、線條等。
Create PDFs − 使用 iText，你可以從 Java 程序創(chuàng)建新的 PDF 文件。你也可以包含圖像和字體。
下載地址：Examples

iText官網(wǎng)： The Leading PDF Library for Developers | iText

一上依賴

            <!-- ITEXTPDF 依賴 -->
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>${com.itextpdf.version}</version>
            </dependency>
 
<com.itextpdf.version>5.5.13.2</com.itextpdf.version>

二 ctroller層

HttpServletResponse：用于將生成的 PDF 文件直接寫入 HTTP 響應(yīng)流中，以便客戶端可以下載或查看 PDF 文件。

目前，方法聲明拋出了 Exception，這會導(dǎo)致所有未捕獲的異常都被拋出到客戶端。為了提高代碼的健壯性，建議捕獲特定的異常，并根據(jù)不同的異常類型返回適當(dāng)?shù)?HTTP 狀態(tài)碼和錯誤信息。

例如，你可以使用 @ExceptionHandler 來捕獲常見的異常，如 IOException、DocumentException 等，并返回 500 Internal Server Error 或其他適當(dāng)?shù)捻憫?yīng)。

    @PostMapping(value = "print/sorting", produces = MediaType.APPLICATION_PDF_VALUE)
    @ApiOperation(value = "打印分揀清單(新)", produces = MediaType.APPLICATION_PDF_VALUE)
    public void printSortingNew(@Valid @RequestBody SortingPrintRequest request, HttpServletResponse response){
        crossdockSortingService.printSortingNew(request,response);
    }

三 Service層

按照業(yè)務(wù)邏輯從數(shù)據(jù)庫獲取數(shù)據(jù)并處理數(shù)據(jù)，放到合適的對象里

（這里主要是和業(yè)務(wù)相關(guān)，不必深究里面內(nèi)容，最后能得出需要的數(shù)據(jù)傳出即可）

@Override
    public void printSorting(SortingPrintRequest request, HttpServletResponse response) throws IOException {
        Crossdock crossdock1 = crossdockService.getByFieldValue(request.getOrderNo(), Crossdock::getOrderNo);
        Set<String> idSet = Sets.newHashSet();idSet.add(crossdock1.getId());
        // 集裝箱編號/柜號、柜型
            List<Crossdock> crossdockList = crossdockService.listByFieldValueSet(idSet, Crossdock::getId);
            if (ObjectUtils.isEmpty(crossdockList)) {
                throw new ApiException(ResultCode.PARAMES_INVALID);
            }
            // 統(tǒng)計(jì)快遞、卡派、自提、存?zhèn)}數(shù)量
            List<CrossdockPlan> crossdockPlanByOrderList = crossdockPlanService.listByFieldValueSet(idSet, CrossdockPlan::getOrderId);
            Map<String, List<CrossdockPlan>> crossdockPlanOrderIdMap = crossdockPlanByOrderList.stream().collect(Collectors.groupingBy(CrossdockPlan::getOrderId));
            // 客戶id、公司
            // 客戶(發(fā)件人)信息 customerVo
            Set<String> customerIdSet = crossdockList.stream().map(Crossdock::getCustomerId).collect(Collectors.toSet());
            Map<String, Customer> customerMap = customerService.mapByFieldValueSet(customerIdSet, Customer::getId);
            // 箱數(shù)統(tǒng)計(jì)，分揀表
            List<CrossdockSorting> crossdockSortingList = listByFieldValueSet(idSet, CrossdockSorting::getOrderId);
            Map<String, List<CrossdockSorting>> crossdockSortingMap = crossdockSortingList.stream().collect(Collectors.groupingBy(CrossdockSorting::getOrderId));
            Set<String> sortingIdSet = crossdockSortingList.stream().map(CrossdockSorting::getId).collect(Collectors.toSet());
            List<CrossdockSortingItem> crossdockSortingItemList = crossdockSortingItemService.listByFieldValueSet(sortingIdSet, CrossdockSortingItem::getSortingId);
            Map<String, List<CrossdockSortingItem>> crossdockSortingItemMap = crossdockSortingItemList.stream().collect(Collectors.groupingBy(CrossdockSortingItem::getSortingId));
            // 公司信息
            Set<String> companySet = crossdockList.stream().map(Crossdock::getCompanyId).collect(Collectors.toSet());
            Map<String, Company> companyMap = companyService.mapByFieldValueSet(companySet, Company::getId);
            // 拼接參數(shù)
            List<ExportSortingVo> exportSortingVoList = new ArrayList<>();
            Map<String, List<ExportSortingDetailVo>> exportSortingDetailVoMap = new HashMap<>(16);
            for (Crossdock crossdock : crossdockList) {
                ExportSortingVo exportSortingVo = new ExportSortingVo();
                exportSortingVo.setKey(crossdock.getOrderNo());
                exportSortingVo.setCabinetType(crossdock.getContainerType());
                exportSortingVo.setCtnr(crossdock.getContainerNo());
                exportSortingVo.setCompany(companyMap.containsKey(crossdock.getCompanyId()) ? companyMap.get(crossdock.getCompanyId()).getName() : null);
                if (customerMap.containsKey(crossdock.getCustomerId())) {
                    exportSortingVo.setCustomerCode(customerMap.get(crossdock.getCustomerId()).getCode());
                }
                // 設(shè)置統(tǒng)計(jì)數(shù)量
                if (crossdockPlanOrderIdMap.containsKey(crossdock.getId())) {
                    List<CrossdockPlan> crossdockPlanList = crossdockPlanOrderIdMap.get(crossdock.getId());
                    // 快遞
                    Map<String, List<CrossdockPlan>> shippingTypeMap = crossdockPlanList.stream().collect(Collectors.groupingBy(CrossdockPlan::getShippingType));
                    if (shippingTypeMap.containsKey(CrossdockEnums.ShippingType.EXPRESS.name())) {
                        List<CrossdockPlan> expressCrossdockPlanList = shippingTypeMap.get(CrossdockEnums.ShippingType.EXPRESS.name());
                        BigDecimal expressAmount = expressCrossdockPlanList.stream().filter(crossdockPlan -> !ObjectUtils.isEmpty(crossdockPlan.getTotalAmount()))
                                .map(CrossdockPlan::getTotalAmount).reduce(BigDecimal.ZERO, BigDecimal::add);
                        exportSortingVo.setUps(expressAmount);
                    }
                    // 卡車
                    if (shippingTypeMap.containsKey(CrossdockEnums.ShippingType.TRUCK.name())) {
                        List<CrossdockPlan> truckCrossdockPlanList = shippingTypeMap.get(CrossdockEnums.ShippingType.TRUCK.name());
                        BigDecimal truckAmount = truckCrossdockPlanList.stream().filter(crossdockPlan -> !ObjectUtils.isEmpty(crossdockPlan.getTotalAmount()))
                                .map(CrossdockPlan::getTotalAmount).reduce(BigDecimal.ZERO, BigDecimal::add);
                        exportSortingVo.setTruck(truckAmount);
                    }
                    // 自提
                    if (shippingTypeMap.containsKey(CrossdockEnums.ShippingType.SELF.name())) {
                        List<CrossdockPlan> selfCrossdockPlanList = shippingTypeMap.get(CrossdockEnums.ShippingType.SELF.name());
                        BigDecimal selfAmount = selfCrossdockPlanList.stream().filter(crossdockPlan -> !ObjectUtils.isEmpty(crossdockPlan.getTotalAmount()))
                                .map(CrossdockPlan::getTotalAmount).reduce(BigDecimal.ZERO, BigDecimal::add);
                        exportSortingVo.setSelf(selfAmount);
                    }
                    // 總數(shù)
                    BigDecimal totalAmount = crossdockPlanList.stream().filter(crossdockPlan -> !ObjectUtils.isEmpty(crossdockPlan.getTotalAmount()))
                            .map(CrossdockPlan::getTotalAmount).reduce(BigDecimal.ZERO, BigDecimal::add);
                    exportSortingVo.setTotal(crossdock.getTotalAmount());       //這里設(shè)置的總箱數(shù)應(yīng)該是轉(zhuǎn)運(yùn)單里面的總箱數(shù)
                    // 留倉/hold
                    BigDecimal warehouseAmount = crossdock.getTotalAmount().subtract(totalAmount);
                    exportSortingVo.setWarehouse(warehouseAmount);
                }
                exportSortingVoList.add(exportSortingVo);
                // 設(shè)置分揀詳細(xì)信息
                List<ExportSortingDetailVo> exportSortingDetailVoList = new ArrayList<>();
                if (crossdockSortingMap.containsKey(crossdock.getId())) {
                    List<CrossdockSorting> crossdockSortingByOrderIdList = crossdockSortingMap.get(crossdock.getId());
                    for (CrossdockSorting crossdockSorting : crossdockSortingByOrderIdList) {
                        if (crossdockSortingItemMap.containsKey(crossdockSorting.getId())) {
                            CrossdockPlan plan = crossdockPlanService.getByFieldValue(crossdockSorting.getSortingPlanRid(), CrossdockPlan::getSortingPlanRid);
                            List<CrossdockPlanGoods> planGoodsList = null;
                            if (plan != null) {
                                planGoodsList = crossdockPlanGoodsService.list(new QueryWrapper<CrossdockPlanGoods>().lambda()
                                        .eq(CrossdockPlanGoods::getPlanId, plan.getId()));
                            }
                            // 箱子信息
                            List<CrossdockSortingItem> crossdockSortingItems = crossdockSortingItemMap.get(crossdockSorting.getId());
                            for (CrossdockSortingItem crossdockSortingItem : crossdockSortingItems) {
                                ExportSortingDetailVo exportSortingDetailVo = new ExportSortingDetailVo();
                                exportSortingDetailVo.setInstructions(crossdockSortingItem.getNote());
                                exportSortingDetailVo.setOrderNo(crossdockSortingItem.getPlNo());
                                exportSortingDetailVo.setBoxesNo(crossdockSortingItem.getPackageNum());
 
                                exportSortingDetailVo.setCbm(BigDecimal.ZERO);
                                if (CollectionUtils.isNotEmpty(planGoodsList)){
                                    List<CrossdockPlanGoods> filterPlanGoodsList = planGoodsList.stream()
                                            .filter(Objects::nonNull)
                                            .filter(x -> Objects.equals(x.getFbaNumber(), crossdockSortingItem.getPlNo()))
                                            .collect(Collectors.toList());
                                    exportSortingDetailVo.setCbm(CollectionUtils.isNotEmpty(filterPlanGoodsList) ? filterPlanGoodsList.get(0).getCbm() : BigDecimal.ZERO);
                                }
 
                                exportSortingDetailVo.setPalletsNo(crossdockSorting.getInboundPallet());
                                exportSortingDetailVo.setStorageLocation(null);
                                exportSortingDetailVo.setSubtotalQuantity(crossdockSorting.getPackageNum());
 
                                if (plan != null && plan.getIsHold()) {
                                    exportSortingDetailVo.setWarehouseCode(crossdockSorting.getSortingNote() + "-HOLD");
                                } else {
                                    exportSortingDetailVo.setWarehouseCode(crossdockSorting.getSortingNote());
                                }
                                exportSortingDetailVoList.add(exportSortingDetailVo);
                            }
                            exportSortingDetailVoMap.put(crossdock.getOrderNo(), exportSortingDetailVoList);
                        }
                    }
                }
            }
            complexFill(exportSortingVoList, exportSortingDetailVoMap, response);
    }

上面數(shù)據(jù)處理好放進(jìn)去然后繼續(xù)調(diào)用

 public void complexFill(List<ExportSortingVo> baseInfoList, Map<String, List<ExportSortingDetailVo>> detailInfoMap, HttpServletResponse response) throws IOException {
        byte[] pdfBytes = convertExcelToPdf(baseInfoList,detailInfoMap);
        // 設(shè)置響應(yīng)頭
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "attachment; filename="+detailInfoMap.keySet().iterator().next()+".pdf");
        // 獲取響應(yīng)輸出流
        OutputStream outputStream = response.getOutputStream();
        outputStream.write(pdfBytes);
        outputStream.flush();
        outputStream.close();
        //打印日志
        PrintLogCreateRequest request = new PrintLogCreateRequest();
        request.setPrintNo(detailInfoMap.keySet().iterator().next());
        request.setPrintType(PrintEnums.type.SORTING.name());
        printLogService.createPrintLog(request);
    }

捕獲特定異常：目前，方法聲明拋出了 IOException，但沒有處理其他可能的異常（如 NullPointerException 或 IllegalArgumentException）。建議捕獲特定的異常，并根據(jù)不同的異常類型返回適當(dāng)?shù)腻e誤信息。

private byte[] convertExcelToPdf(List<ExportSortingVo> baseInfoList,Map<String, List<ExportSortingDetailVo>> detailInfoMap) throws IOException{
        Document document = new Document();
        ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();
        try {
            PdfWriter writer = PdfWriter.getInstance(document, pdfOutputStream);
            BaseFont bf = BaseFont.createFont(TEMPLATE_FONT, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            // 設(shè)置頁邊距
            document.setMargins(1, 1, 10, 10);
            document.open();
            ExportSortingVo sorting = baseInfoList.get(0);
            PdfPTable table = new PdfPTable(8); // 有8列
            // 第一行
            PdfPCell cell1 = new PdfPCell(new Paragraph("客戶編號："+sorting.getCustomerCode(),new Font(bf,12,Font.NORMAL)));
            cell1.setColspan(1);
            cell1.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell1);
            PdfPCell cell2 = new PdfPCell(new Paragraph("總數(shù)",new Font(bf,12,Font.NORMAL)));
            cell2.setColspan(1);
            cell2.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell2);
            PdfPCell cell3 = new PdfPCell(new Paragraph(" ",new Font(bf,12,Font.NORMAL)));
            cell3.setColspan(1);
            cell3.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell3);
            PdfPCell cell4 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(sorting.getTotal()) ? StringUtils.EMPTY : sorting.getTotal().stripTrailingZeros().toPlainString(),new Font(bf,12,Font.NORMAL)));
            cell4.setColspan(3);
            cell4.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell4);
            PdfPCell cell5 = new PdfPCell(new Paragraph("拆柜公司",new Font(bf,12,Font.NORMAL)));
            cell5.setColspan(1);
            cell5.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell5);
            PdfPCell cell6 = new PdfPCell(new Paragraph(" ",new Font(bf,12,Font.NORMAL)));
            cell6.setColspan(1);
            cell6.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell6);
            // 第二行
            PdfPCell cell7 = new PdfPCell(new Paragraph("公司："+sorting.getCompany(),new Font(bf,12,Font.NORMAL)));
            cell7.setColspan(1);
            cell7.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell7);
            PdfPCell cell8 = new PdfPCell(new Paragraph("UPS/Fedex",new Font(bf,12,Font.NORMAL)));
            cell8.setColspan(1);
            cell8.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell8);
            PdfPCell cell9 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell9.setColspan(1);
            cell9.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell9);
            PdfPCell cell10 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(sorting.getUps()) ? StringUtils.EMPTY : sorting.getUps().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
            cell10.setColspan(3);
            cell10.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell10);
            PdfPCell cell11 = new PdfPCell(new Paragraph("拆柜碼頭", new Font(bf, 12, Font.NORMAL)));
            cell11.setColspan(1);
            cell11.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell11);
            PdfPCell cell12 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell12.setColspan(1);
            cell12.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell12);
            // 第三行
            PdfPCell cell13 = new PdfPCell(new Paragraph("柜號："+sorting.getCtnr(),new Font(bf,12,Font.NORMAL)));
            cell13.setColspan(1);
            cell13.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell13);
            PdfPCell cell14 = new PdfPCell(new Paragraph("留倉/Hold",new Font(bf,12,Font.NORMAL)));
            cell14.setColspan(1);
            cell14.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell14);
            PdfPCell cell15 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell15.setColspan(1);
            cell15.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell15);
            PdfPCell cell16 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(sorting.getWarehouse()) ? StringUtils.EMPTY : sorting.getWarehouse().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
            cell16.setColspan(3);
            cell16.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell16);
            PdfPCell cell17 = new PdfPCell(new Paragraph("拆柜開始時(shí)間", new Font(bf, 12, Font.NORMAL)));
            cell17.setColspan(1);
            cell17.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell17);
            PdfPCell cell18 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell18.setColspan(1);
            cell18.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell18);
            // 第四行
            PdfPCell cell19 = new PdfPCell(new Paragraph("柜式："+sorting.getCabinetType(),new Font(bf,12,Font.NORMAL)));
            cell19.setColspan(1);
            cell19.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell19);
            PdfPCell cell20 = new PdfPCell(new Paragraph("卡派",new Font(bf,12,Font.NORMAL)));
            cell20.setColspan(1);
            cell20.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell20);
            PdfPCell cell21 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell21.setColspan(1);
            cell21.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell21);
            PdfPCell cell22 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(sorting.getTruck()) ? StringUtils.EMPTY : sorting.getTruck().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
            cell22.setColspan(3);
            cell22.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell22);
            PdfPCell cell23 = new PdfPCell(new Paragraph("拆柜結(jié)束時(shí)間", new Font(bf, 12, Font.NORMAL)));
            cell23.setColspan(1);
            cell23.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell23);
            PdfPCell cell24 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell24.setColspan(1);
            cell24.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell24);
            // 第五行
            PdfPCell cell25 = new PdfPCell(new Paragraph(" ",new Font(bf,12,Font.NORMAL)));
            cell25.setColspan(1);
            cell25.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell25);
            PdfPCell cell26 = new PdfPCell(new Paragraph("自提",new Font(bf,12,Font.NORMAL)));
            cell26.setColspan(1);
            cell26.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell26);
            PdfPCell cell27 = new PdfPCell(new Paragraph(" ", new Font(bf, 12, Font.NORMAL)));
            cell27.setColspan(1);
            cell27.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell27);
            PdfPCell cell28 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(sorting.getSelf()) ? StringUtils.EMPTY : sorting.getSelf().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
            cell28.setColspan(1);
            cell28.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell28);
            PdfPCell cell29 = createBarcodeImage(writer, sorting.getKey());
            cell29.setColspan(4);
            cell29.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell29);
            //第六行
            PdfPCell cell31 = new PdfPCell(new Paragraph("訂單號", new Font(bf, 12, Font.NORMAL)));
            cell31.setColspan(1);
            cell31.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell31);
            PdfPCell cell32 = new PdfPCell(new Paragraph("箱子數(shù)量", new Font(bf, 12, Font.NORMAL)));
            cell32.setColspan(1);
            cell32.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell32);
            PdfPCell cell33 = new PdfPCell(new Paragraph("體積", new Font(bf, 12, Font.NORMAL)));
            cell33.setColspan(1);
            cell33.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell33);
            PdfPCell cell34 = new PdfPCell(new Paragraph("倉庫代碼", new Font(bf, 12, Font.NORMAL)));
            cell34.setColspan(1);
            cell34.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell34);
            PdfPCell cell35 = new PdfPCell(new Paragraph("數(shù)量小計(jì)", new Font(bf, 12, Font.NORMAL)));
            cell35.setColspan(1);
            cell35.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell35);
            PdfPCell cell36 = new PdfPCell(new Paragraph("存儲位置", new Font(bf, 12, Font.NORMAL)));
            cell36.setColspan(1);
            cell36.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell36);
            PdfPCell cell37 = new PdfPCell(new Paragraph("托盤數(shù)量", new Font(bf, 12, Font.NORMAL)));
            cell37.setColspan(1);
            cell37.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell37);
            PdfPCell cell38 = new PdfPCell(new Paragraph("外箱標(biāo)記或說明", new Font(bf, 12, Font.NORMAL)));
            cell38.setColspan(1);
            cell38.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
            table.addCell(cell38);
            //第七行
            List<ExportSortingDetailVo> detailList = detailInfoMap.get(sorting.getKey());
            //按照倉庫代碼的A-Z順序來排序
            detailList.sort(Comparator.comparing(ExportSortingDetailVo::getWarehouseCode, Comparator.nullsLast(Comparator.naturalOrder())));
            Map<String, Long> warehouseCodeCountMap = detailList.stream().filter(Objects::nonNull).map(ExportSortingDetailVo::getWarehouseCode).filter(Objects::nonNull)
                    .collect(Collectors.groupingBy(Function.identity(),Collectors.counting()));
            Map<String, Integer> firstOccurrenceMap = new HashMap<>();
            for (int i = 0; i < detailList.size(); i++) {
                ExportSortingDetailVo detail = detailList.get(i);
                String warehouseCode = detail.getWarehouseCode();
                if (warehouseCode != null && !firstOccurrenceMap.containsKey(warehouseCode)) {
                    firstOccurrenceMap.put(warehouseCode, i);
                }
            }
            for (int i = 0; i < detailList.size(); i++) {
                ExportSortingDetailVo detail = detailList.get(i);
                PdfPCell cell39 = new PdfPCell(new Paragraph(detail.getOrderNo(), new Font(bf, 12, Font.NORMAL)));
                cell39.setColspan(1);
                cell39.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                table.addCell(cell39);
                PdfPCell cell40 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getBoxesNo()) ? StringUtils.EMPTY : detail.getBoxesNo().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
                cell40.setColspan(1);
                cell40.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                table.addCell(cell40);
                PdfPCell cell41 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getCbm()) ? StringUtils.EMPTY : detail.getCbm().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
                cell41.setColspan(1);
                cell41.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                table.addCell(cell41);
                Integer i1 = firstOccurrenceMap.get(detail.getWarehouseCode());
                Long l = warehouseCodeCountMap.get(detail.getWarehouseCode());
                if (i1 == i) {
                    PdfPCell cell42 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getWarehouseCode()) ? StringUtils.EMPTY : detail.getWarehouseCode(), new Font(bf, 12, Font.NORMAL)));
                    cell42.setColspan(1);
                    cell42.setRowspan(Math.toIntExact(l));
                    cell42.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                    cell42.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);
                    table.addCell(cell42);
                    PdfPCell cell43 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getSubtotalQuantity()) ? StringUtils.EMPTY : detail.getSubtotalQuantity().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
                    cell43.setColspan(1);
                    cell43.setRowspan(Math.toIntExact(l));
                    cell43.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                    cell43.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);
                    table.addCell(cell43);
                    PdfPCell cell44 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getStorageLocation()) ? StringUtils.EMPTY : detail.getStorageLocation(), new Font(bf, 12, Font.NORMAL)));
                    cell44.setColspan(1);
                    cell44.setRowspan(Math.toIntExact(l));
                    cell44.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                    cell44.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);
                    table.addCell(cell44);
                    PdfPCell cell45 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getPalletsNo()) ? StringUtils.EMPTY : detail.getPalletsNo().stripTrailingZeros().toPlainString(), new Font(bf, 12, Font.NORMAL)));
                    cell45.setColspan(1);
                    cell45.setRowspan(Math.toIntExact(l));
                    cell45.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                    cell45.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);
                    table.addCell(cell45);
                }
                PdfPCell cell46 = new PdfPCell(new Paragraph(ObjectUtils.isEmpty(detail.getInstructions()) ? StringUtils.EMPTY : detail.getInstructions(), new Font(bf, 12, Font.NORMAL)));
                cell46.setColspan(1);
                cell46.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
                table.addCell(cell46);
            }
            document.add(table);
        } catch (DocumentException e) {
            log.error("error!", e);
            throw new ApiException(ResultCode.FAULT);
        }
        document.close();
        return pdfOutputStream.toByteArray();
    }

上面代碼就是一行行的把值塞進(jìn)去，

值得一提的是行合并，也就是幾行明細(xì)對應(yīng)一行的內(nèi)容

代碼

按照倉庫代碼的A-Z順序來排序 處

detailList 中的 ExportSortingDetailVo 對象將按照 warehouseCode 的字母表順序進(jìn)行排序，null 值排在最后。

warehouseCodeCountMap 是一個 Map<String, Long>，其中鍵是倉庫代碼，值是該倉庫代碼在 detailList 中出現(xiàn)的次數(shù)。
firstOccurrenceMap 是一個 Map<String, Integer>，其中鍵是倉庫代碼，值是該倉庫代碼在 detailList 中第一次出現(xiàn)的索引位置。

看這里可能有點(diǎn)不明白，看到效果圖相信你會恍然大悟的

四條形碼工具類

    private PdfPCell createBarcodeImage(PdfWriter writer, String code) {
        Barcode128 barcode = new Barcode128();
        barcode.setCode(code);
        barcode.setCodeType(Barcode128.CODE128);
        barcode.setSize(12); // 設(shè)置條形碼的字體大小
        barcode.setBaseline(10); // 設(shè)置基線位置
        barcode.setX(1.5f); // 設(shè)置條形碼的寬度
        barcode.setBarHeight(50f); // 設(shè)置條形碼的高度
 
        // 將條形碼轉(zhuǎn)換為 Image 對象
        Image barcodeImage = barcode.createImageWithBarcode(writer.getDirectContent(), null, null);
        PdfPCell cell = new PdfPCell(barcodeImage);
        cell.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
        return cell;
    }