问如何在PDFBox 2.0.2中从PDDocument中提取字体

EN

PDDocument doc = PDDocument.load("C:/mydoc3.pdf");
for (int i = 0; i < doc.getNumberOfPages(); ++i)
{
    PDPage page = doc.getPage(i);
    PDResources res = page.getResources();
    for (COSName fontName : res.getFontNames())
    {
        PDFont font = res.getFont(fontName);
        // do stuff with the font
    }
}

 PDFMetaData pdfMeta = new PDFMetaData();
 PDDocument document = PDDocument.load(new File("/Users/ban.pdf"));
 PDPage page = document.getPage(0);
 PDResources res = page.getResources();
 for (COSName fontName : res.getFontNames())
{
  PDFont font = res.getFont(fontName);
  pdfMeta.setFontName(font);                    
}

PDDocument  doc = PDDocument.load("C:/mydoc3.pdf");
for(PDPage page : doc.getPages()){
    // get the names of the fonts in the resources dictionary
    Iterable<COSName> iterable = page.getResources().getFontNames();
    // to get the font for each item call
    // page.getResources().getFont(COSName name);
}