<?xml version="1.0" encoding="UTF-8"?>
   <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
     <!-- XSL-FO 文档内容 -->
   </fo:root>

import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.io.File;
import java.io.OutputStream;

public class XSLFOToPDF {
    public static void main(String[] args) {
        try {
            // 设置输入和输出文件路径
            String inputFilePath = "input.xslfo";
            String outputFilePath = "output.pdf";

            // 初始化 FopFactory
            FopFactory fopFactory = FopFactory.newInstance(new File(".").toURI());

            // 设置输出流
            OutputStream out = new java.io.FileOutputStream(outputFilePath);

            // 初始化 Fop 对象
            Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, out);

            // 设置 XSLT 转换
            TransformerFactory factory = TransformerFactory.newInstance();
            Transformer transformer = factory.newTransformer(new StreamSource(new File(inputFilePath)));

            // 执行转换
            transformer.transform(new StreamSource(new File(inputFilePath)), new StreamResult(fop.getDefaultHandler()));

            // 关闭输出流
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}