java根据模板导出pdf，并将多个pdf合成一个

- 日理万妓 2024-03-25 06:24 95阅读 0赞

### 前言 ###

项目中，遇到这么一个需求：根据单个模板批量导出pdf，批量导出的pdf要合并成一个pdf进行打印。两个问题点：1、根据模板生成pdf。2、pdf合并

### 一、前期准备工作（准备pdf模板） ###

这个问题可以使用itextpdf和Adobe Acrobat 来实现。  
1、根据提供的word生成的pdf的模板样式  
![在这里插入图片描述][2fb26371b0754e5a9743e19fabd0d19b.png]  
2、将其转出为pdf，wps就可以操作  
3、用Adobe Acrobat打开该pdf  
![在这里插入图片描述][aa9933c0ddc94cf4909202246faa66a5.png]4、选择工具打开表单  
![在这里插入图片描述][69f9aab6d5b44a1dad1d9f7a04a52882.png]  
5、自动检测到一些域但是不全，我们可以自己添加并且编辑相关的属性  
![在这里插入图片描述][7002806f2c1c4fa5b81892c5c41c8b9a.png]

### 二、整合项目 ###

## 1、生成pdf ##

**1.1项目依赖**

<dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.4.3</version>
            </dependency>
    
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-asian</artifactId>
                <version>5.2.0</version>
            </dependency>

**1.2将准备好的模板pdf放入到项目中**  
![在这里插入图片描述][a909a63193354c9eaaffce0f17a04e95.png]  
**1.3相关代码**  
1、读取模板以及设置字体

File schoolRollQRCode = QrCodeUtil.generate(studentPdfVo.getSchoolRoll(), 300, 300, FileUtil.file("/qrcode" + imageNumber + ".jpg"));
                map.put("schoolRollQRCode", schoolRollQRCode.getPath());
                org.springframework.core.io.Resource resource = new ClassPathResource("pdf_template/student.pdf");
                PdfReader reader = new PdfReader(resource.getInputStream());
                BaseFont bf = BaseFont.createFont();
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                PdfStamper stamper = new PdfStamper(reader, bos);
                AcroFields form = stamper.getAcroFields();
                form.addSubstitutionFont(bf);
    
                float bigFontSize = 10;
                // false可编辑
                stamper.setFormFlattening(true);

2、普通数据的录入，即模板中文本域对应单字段的录入:

Map<String, String> map1 = new HashMap<>(32);
            imageNumber++;
            File schoolRollQRCode = QrCodeUtil.generate(studentPdfVo.getSchoolRoll(), 300, 300, FileUtil.file("/qrcode" + imageNumber + ".jpg"));
            map.put("schoolRollQRCode", schoolRollQRCode.getPath());
            map.put("schoolRoll", studentPdfVo.getSchoolRoll());
            map.put("name", studentPdfVo.getName());
            map.put("gradeName", studentPdfVo.getGradeName());
     map.forEach((key, value) -> {
        
                    try {
        
                        if ("schoolRollQRCode".equals(key)) {
        
                            int pageNo = stamper.getAcroFields().getFieldPositions(key).get(0).page;
                            Rectangle signRect = stamper.getAcroFields().getFieldPositions(key).get(0).position;
                            float x = signRect.getLeft();
                            float y = signRect.getBottom();
                            // 读图片
                            Image image = Image.getInstance(map.get(key));
                            // 获取操作的页面
                            PdfContentByte under = stamper.getOverContent(pageNo);
                            // 根据域的大小缩放图片
                            image.scaleToFit(signRect.getWidth(), signRect.getHeight());
                            // 添加图片
                            image.setAbsolutePosition(x, y);
                            under.addImage(image);
                        } else {
        
                            //设置这个表单域的字体
                            form.setFieldProperty(key, "textfont", bfChinese, null);
                            //设置这个表单域的字体大小
                            form.setFieldProperty(key, "textsize", bigFontSize, null);
                            form.setField(key, value);
                        }
                    } catch (IOException e) {
        
                        e.printStackTrace();
                    } catch (DocumentException e) {
        
                        e.printStackTrace();
                    }
                });

3、二维码图片的录入

int pageNo = stamper.getAcroFields().getFieldPositions(key).get(0).page;
                            Rectangle signRect = stamper.getAcroFields().getFieldPositions(key).get(0).position;
                            float x = signRect.getLeft();
                            float y = signRect.getBottom();
                            // 读图片
                            Image image = Image.getInstance(map.get(key));
                            // 获取操作的页面
                            PdfContentByte under = stamper.getOverContent(pageNo);
                            // 根据域的大小缩放图片
                            image.scaleToFit(signRect.getWidth(), signRect.getHeight());
                            // 添加图片
                            image.setAbsolutePosition(x, y);
                            under.addImage(image);

4、集合的录入

Map<String, List<String>> listMap = new HashMap<>(4);
                if (CollectionUtil.isNotEmpty(nameList)) {
        
                    listMap.put("Box1", nameList);
                }
    listMap.forEach((key, value) -> {
        
                    if (CollectionUtil.isNotEmpty(value)) {
        
                        int pageNo = form.getFieldPositions(key).get(0).page;
                        PdfContentByte pcb = stamper.getOverContent(pageNo);
                        Rectangle signRect = form.getFieldPositions(key).get(0).position;
                        //表格位置
                        int column = 2;
                        int row = value.size();
                        PdfPTable table = new PdfPTable(column);
                        float totalWidth = signRect.getRight() - signRect.getLeft();
    
                        float[] width = new float[2];
                        width[0] = (totalWidth / 9) * 2;
                        width[1] = (totalWidth / 9) * 7;
                        try {
        
                            table.setTotalWidth(width);
                        } catch (DocumentException e) {
        
                            e.printStackTrace();
                        }
                        table.setLockedWidth(true);
                        table.setKeepTogether(true);
                        table.setSplitLate(false);
                        table.setSplitRows(true);
                        Font fontProve = new Font(bfChinese, 13, 0);
                        //表格数据填写
                        for (int i = 0; i < row; i++) {
        
    
                            // 第一列
                            String name = value.get(i);
                            Phrase phrase;
                            if ("体检项目".equals(name)) {
        
                                phrase = new Phrase(name, new Font(bfChinese, 17, 0));
                            } else {
        
                                phrase = new Phrase(name, fontProve);
                            }
                            PdfPCell cell = new PdfPCell(phrase);
    
                            cell.setBorderWidth(1);
                            cell.setBorderWidthRight(0);
                            cell.setHorizontalAlignment(Element.ALIGN_RIGHT);
                            cell.setVerticalAlignment(Element.ALIGN_CENTER);
    
                            cell.setLeading((float) 3.0, (float) 1.0);
                            cell.setMinimumHeight(30f);
                            table.addCell(cell);
                            // 第二列
                            Phrase phrase2 = new Phrase(null, fontProve);
                            PdfPCell cell2 = new PdfPCell(phrase2);
                            cell2.setBorderWidth(1);
                            cell2.setBorderWidthLeft(0);
                            cell2.setHorizontalAlignment(Element.ALIGN_CENTER);
                            cell2.setVerticalAlignment(Element.ALIGN_CENTER);
    
                            cell2.setLeading((float) 3.0, (float) 1.0);
                            cell2.setMinimumHeight(30f);
                            table.addCell(cell2);
                        }
                        table.writeSelectedRows(0, value.size(), signRect.getLeft(), signRect.getTop(), pcb);
                    }
                });

5、导出结果  
![在这里插入图片描述][14a7f5429ef44ae6a61e4efca0c9eddf.png]

## 2、pdf合并 ##

**2.1项目依赖**

<dependency>
                <groupId>com.luhuiguo</groupId>
                <artifactId>aspose-pdf</artifactId>
                <version>23.1</version>
            </dependency>

**2.2相关代码**

OutputStream out = response.getOutputStream();
                InputStream[] inputStreams = new InputStream[outputStreams.size()];
                int i = 0;
                for (ByteArrayOutputStream byteArrayOutputStream : outputStreams) {
        
                    // 将输出流转化成输入流
                    ByteArrayInputStream swapStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
                    inputStreams[i] = swapStream;
                    i++;
                }
                // 合并pdf
                PdfFileEditor pdfFileEditor = new PdfFileEditor();
                pdfFileEditor.concatenate(inputStreams, out);

**2.3最终效果展示**  
![在这里插入图片描述][42996cb839634bbbb4b5b81c4e218a52.png]

[2fb26371b0754e5a9743e19fabd0d19b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/e45a2a132fee452095af691ea906a0fe.png
[aa9933c0ddc94cf4909202246faa66a5.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/0d93c7f2ff224f6c868bbc201741f8a9.png
[69f9aab6d5b44a1dad1d9f7a04a52882.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/92394a6443354bf9ae04f6709701ae93.png
[7002806f2c1c4fa5b81892c5c41c8b9a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/196bda7160514aa8a24be037de7afa70.png
[a909a63193354c9eaaffce0f17a04e95.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/9e7be14333eb4ef89c7cc494336c6b29.png
[14a7f5429ef44ae6a61e4efca0c9eddf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/b430564958ba4950a1a5fa2721ac51b8.png
[42996cb839634bbbb4b5b81c4e218a52.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/70f412be1b764fda800456e19591d469.png