如何将字节数组转换为pdf？

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class ByteArrayToPdfConverter {
    public static void main(String[] args) {
        byte[] byteArray = getByteArray(); // 获取字节数组

        try {
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));

            document.open();
            document.add(new com.itextpdf.text.Paragraph("Hello, World!")); // 添加文本内容

            // 将字节数组写入PDF文档
            ByteArrayInputStream inputStream = new ByteArrayInputStream(byteArray);
            writer.getDirectContent().addTemplate(writer.getImportedPage(inputStream, 1), 0, 0);

            document.close();
            writer.close();

            System.out.println("PDF生成成功！");
        } catch (DocumentException | IOException e) {
            e.printStackTrace();
        }
    }

    private static byte[] getByteArray() {
        // 获取字节数组的逻辑
        // ...
        return new byte[0];
    }
}