Java使用docx4j实现将Word文档转换为PDF

<dependencies>
    <!-- docx4j 核心库 -->
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-core</artifactId>
        <version>11.5.4</version>
    </dependency>
    <!-- FO 导出（转PDF必需） -->
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-export-fo</artifactId>
        <version>11.5.4</version>
    </dependency>
    <!-- JAXB 实现（JDK 9+ 必须显式引入） -->
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-JAXB-ReferenceImpl</artifactId>
        <version>11.5.4</version>
    </dependency>
</dependencies>

import org.docx4j.Docx4J;
import org.docx4j.fonts.IdentityPlusMapper;
import org.docx4j.fonts.Mapper;
import org.docx4j.fonts.PhysicalFonts;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
public class DocxToPdfConverter {
    public static void convert(String docxPath, String pdfPath) throws Exception {
        // 1. 加载 DOCX 文件
        WordprocessingMLPackage pkg = WordprocessingMLPackage.load(new File(docxPath));
        // 2. 配置字体映射（解决中文乱码/方框问题）
        Mapper fontMapper = new IdentityPlusMapper();
        // 自动扫描系统字体
        PhysicalFonts.discoverPhysicalFonts();
        // 常用中文字体映射（Windows/Linux通用）
        fontMapper.put("宋体", PhysicalFonts.get("SimSun"));
        fontMapper.put("微软雅黑", PhysicalFonts.get("Microsoft YaHei"));
        fontMapper.put("黑体", PhysicalFonts.get("SimHei"));
        fontMapper.put("楷体", PhysicalFonts.get("KaiTi"));
        fontMapper.put("隶书", PhysicalFonts.get("LiSu"));
        pkg.setFontMapper(fontMapper);
        // 3. 转换并输出 PDF
        try (OutputStream os = new FileOutputStream(pdfPath)) {
            // FLAG_EXPORT_PREFER_XSL：兼容性最好
            Docx4J.toPDF(pkg, os);
        }
    }
    // 测试
    public static void main(String[] args) throws Exception {
        convert("input.docx", "output.pdf");
        System.out.println("转换完成");
    }
}