嵌入RTF内容的java PDFBox

Question

我正在使用我的java代码中的PDFBox创建PDF文件。在此期间，我需要在这个新的PDF文件之间嵌入一个RTF（富文本格式）文件。我无法通过谷歌找到任何方法来做到这一点

我确信，我无法将RTF内容直接写入PDF。尽管我尝试了下面的代码，但在打开PDF时出现了错误。错误表示PDF已损坏

注意：类似的事情可以在C#和VB http://www.syncfusion.com/kb/845/how-to-insert-an-rtf-text-into-a-pdf-document中完成。所以我很乐观，java中肯定也有类似的东西

我使用的是PDFBox 1.8.10

示例代码：

public static void main(String arg[])  throws IOException, COSVisitorException
{
    final PDFont font = PDType1Font.HELVETICA_OBLIQUE;
    final int font_size = 8;

    PDDocument document = new PDDocument();
    PDPage page = new PDPage(PDPage.PAGE_SIZE_LETTER);
    document.addPage(page);
    PDPageContentStream contents = new PDPageContentStream(document, page, true, true);
    float x = 10f;
    float y = page.getMediaBox().getHeight();  
    float yOffset = 15f;
    float yCurrent = y - yOffset;  

    contents.beginText();
    contents.moveTextPositionByAmount(x, yCurrent);
    contents.setFont(font, font_size);
    contents.drawString("Start Text before RTF"); 
    contents.endText();

    yCurrent = yCurrent - yOffset;

    FileInputStream fi = new FileInputStream("C:\\Test.rtf");
    StringBuffer sb = new StringBuffer();
    BufferedReader br= new BufferedReader(new InputStreamReader(fi));
    int c;
    try {
        while((c=br.read()) != -1){
            sb.append((char)c);
        }
    } catch (IOException e) {
        throw e;
    }
    br.close();
    String rtfContent = sb.toString();

    contents.beginText();
    contents.moveTextPositionByAmount(x, yCurrent);
    contents.setFont(font, font_size);
    contents.drawString(rtfContent); 
    contents.endText();
    yCurrent = yCurrent - yOffset;

    contents.beginText();
    contents.moveTextPositionByAmount(x, yCurrent);
    contents.setFont(font, font_size);
    contents.drawString("End Text after RTF"); 
    contents.endText();

    contents.close();


    File file = new File("C:\\pdf\\RTF\\RRFSample1.pdf");
    System.out.println("Sample file saved at : " + file.getAbsolutePath());
    document.save(file);
    document.close();
}