Java实现在Word模板指定位置添加二维码并生成 PDF

<dependencies>
    <!-- Apache POI 处理 Word 文档 -->
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>5.2.3</version>
    </dependency>
    <!-- ZXing 生成二维码 -->
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>3.4.1</version>
    </dependency>
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>javase</artifactId>
        <version>3.4.1</version>
    </dependency>
    <!-- Docx4J 将 Word 转换为 PDF -->
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-JAXB-Internal</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-JAXB-ReferenceImpl</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-export-fo</artifactId>
        <version>11.4.9</version>
    </dependency>
</dependencies>

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
 
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
 
public class QRCodeGenerator {
    public static BufferedImage generateQRCode(String text, int width, int height) throws WriterException {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        Map<EncodeHintType, Object> hints = new HashMap<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);
        return MatrixToImageWriter.toBufferedImage(bitMatrix);
    }
}

import org.apache.poi.xwpf.usermodel.*;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
 
public class WordQRCodeInserter {
    public static void insertQRCodeIntoWord(String templatePath, String outputPath, BufferedImage qrCodeImage, String placeholder) throws IOException {
        try (FileInputStream fis = new FileInputStream(templatePath);
             XWPFDocument document = new XWPFDocument(fis)) {
            for (XWPFParagraph paragraph : document.getParagraphs()) {
                for (XWPFRun run : paragraph.getRuns()) {
                    String text = run.getText(0);
                    if (text != null && text.contains(placeholder)) {
                        // 清除占位符文本
                        run.setText("", 0);
                        // 插入二维码图片
                        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                        ImageIO.write(qrCodeImage, "png", byteArrayOutputStream);
                        byte[] imageBytes = byteArrayOutputStream.toByteArray();
                        int pictureType = XWPFDocument.PICTURE_TYPE_PNG;
                        int width = qrCodeImage.getWidth();
                        int height = qrCodeImage.getHeight();
                        paragraph.createRun().addPicture(new ByteArrayInputStream(imageBytes), pictureType, "qrcode.png", width * 20, height * 20);
                    }
                }
            }
            try (FileOutputStream fos = new FileOutputStream(outputPath)) {
                document.write(fos);
            }
        }
    }
}

import org.docx4j.Docx4J;
import org.docx4j.convert.out.FOSettings;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
 
import java.io.*;
 
public class WordToPdfConverter {
    public static void convertWordToPdf(String wordPath, String pdfPath) throws Exception {
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new File(wordPath));
        FOSettings foSettings = Docx4J.createFOSettings();
        foSettings.setWmlPackage(wordMLPackage);
        try (OutputStream os = new FileOutputStream(pdfPath)) {
            Docx4J.toPDF(foSettings, os, Docx4J.FLAG_EXPORT_PREFER_XSL);
        }
    }
}

import java.io.IOException;
 
import com.google.zxing.WriterException;
 
public class Main {
    public static void main(String[] args) {
        try {
            // 要生成二维码的内容
            String qrCodeContent = "https://www.example.com";
            // 生成二维码图片
            BufferedImage qrCodeImage = QRCodeGenerator.generateQRCode(qrCodeContent, 200, 200);
 
            // Word 模板文件路径
            String templatePath = "path/to/your/template.docx";
            // 插入二维码后的 Word 文件输出路径
            String wordOutputPath = "path/to/your/output.docx";
            // 最终生成的 PDF 文件输出路径
            String pdfOutputPath = "path/to/your/output.pdf";
            // Word 模板中的二维码占位符
            String placeholder = "{QR_CODE}";
 
            // 在 Word 模板中插入二维码
            WordQRCodeInserter.insertQRCodeIntoWord(templatePath, wordOutputPath, qrCodeImage, placeholder);
 
            // 将插入二维码后的 Word 文档转换为 PDF
            WordToPdfConverter.convertWordToPdf(wordOutputPath, pdfOutputPath);
 
            System.out.println("PDF 电子凭证文档生成成功！");
        } catch (WriterException | IOException | Exception e) {
            e.printStackTrace();
        }
    }
}