如何在java中使用pdfbox将文件转换为pdf？

我想从.docx或.txt文件中提取所有内容，然后创建一个包含确切内容的新pdf文档。问题是，我想用精确的字体样式提取内容，如果是粗体或斜体…这是我到目前为止所做的：

public class Main {
    public static void main(String[] args) {
        JFileChooser fileChooser = new JFileChooser();
        File file = null;
        do {

            int returnedValue = fileChooser.showOpenDialog(null);
            if (returnedValue == JFileChooser.APPROVE_OPTION) {
                file = fileChooser.getSelectedFile();
            } else break;
        } while (!file.getAbsolutePath().endsWith(".txt") &&
                !file.getAbsolutePath().endsWith(".docx"));
        Controller controller = new Controller();
        controller.createPDF(file);
    }
}

public class Controller {
    public void createPDF(File file) {
        String text = readFileContent(file);
        System.out.println(text);
        try {
            newPdf(text, file);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (COSVisitorException e) {
            e.printStackTrace();
        } catch (FontFormatException e) {
            e.printStackTrace();
        }
    }


    private void newPdf(String text, File file) throws IOException, COSVisitorException, FontFormatException {
        PDDocument doc = new PDDocument();
        PDPage page = new PDPage();
        doc.addPage(page);
        PDPageContentStream contentStream = new PDPageContentStream(doc, page);
        PDFont font = PDType1Font.COURIER;
        contentStream.setFont(font, 14);
        contentStream.beginText();
        contentStream.setNonStrokingColor(Color.black);
        contentStream.moveTextPositionByAmount(20, 750);
        contentStream.drawString(text);
        contentStream.endText();
        contentStream.close();
        doc.save("doc.pdf");
        doc.close();
    }

    private String readFileContent(File file) {
        String finalText = new String();
        try {
            FileReader fileReader = new FileReader(file.getAbsolutePath());
            BufferedReader br = new BufferedReader(fileReader);
            String line;
            while ((line = br.readLine()) != null)
                finalText += line;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return finalText;
    }
}

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有关TXT，请参阅TextToPDF的源代码。对于docx，我不知道。。。也许可以研究ApachePOI.TXT，请参阅TextToPDF的源代码。对于docx，我不知道。。。也许是研究ApachePOI。