如何使用Unicode字符集的语言创建有关使用第三方字体的PDF文档

Question

我正在使用PDFBox和iText从各种语言创建一个简单(只是段落)的pdf文档.就像是 :

pdfBox:

private static void createPdfBoxDocument(File from, File to) {
    PDDocument document = null;
    try {
        document = new TextToPDF().createPDFFromText(new FileReader(from));
        document.save(new FileOutputStream(to));
    } finally {
        if (document != null)
            document.close();
    }
}

private void createPdfBoxDoc() throws IOException, FileNotFoundException, COSVisitorException {
    PDDocument document = new PDDocument();
    PDPage page = new PDPage();
    document.addPage(page);
    PDPageContentStream contentStream = new PDPageContentStream(document, page);

    PDType1Font font = PDType1Font.TIMES_ROMAN;
    contentStream.setFont(font, 12);
    contentStream.beginText();
    contentStream.moveTextPositionByAmount(100, 400);
    contentStream.drawString("š");
    contentStream.endText();
    contentStream.close();
    document.save("test.pdf");
    document.close();
}

itext:

private static Font blackFont = new Font(Font.FontFamily.COURIER, 12, Font.NORMAL, BaseColor.BLACK);

private static void createITextDocument(File from, File to) {
    Document document = new Document();
    PdfWriter.getInstance(document, new FileOutputStream(to));
    document.open();
    addContent(document, getParagraphs(from));
    document.close();
}

private static void addContent(Document document, List<String> paragraphs) { 

    for (int i = 0; i < paragraphs.size(); i++) {
        document.add(new Paragraph(paragraphs.get(i), blackFont));
    }
}

输入文件以UTF-8编码,并且某些Unicode字符集的语言(如俄语字母等)在pdf中无法正确呈现.两个库中的字体不支持我认为的Unicode字符集,我找不到有关如何添加和使用第三方字体的任何文档.可以请任何人帮我一个例子吗？

Answer 1

如果你使用iText,它有很好的支持.

在iText in Action(第2.2.2章)中,您可以阅读更多内容.

你必须下载一些像arialuni.ttf这样的unicode字体并按照下面这样做:

    public static File fontFile = new File("fonts/arialuni.ttf");

    public static void createITextDocument(File from, File to) throws DocumentException, IOException {

        Document document = new Document();
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(to));
        document.open();
        writer.getAcroForm().setNeedAppearances(true);
        BaseFont unicode = BaseFont.createFont(fontFile.getAbsolutePath(), BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

        FontSelector fs = new FontSelector();
        fs.addFont(new Font(unicode));

        addContent(document, getParagraphs(from), fs);
        document.close();
    }

    private static void addContent(Document document, List<String> paragraphs, FontSelector fs) throws DocumentException { 

        for (int i = 0; i < paragraphs.size(); i++) {
            Phrase phrase = fs.process(paragraphs.get(i));
            document.add(new Paragraph(phrase));
        }
    }

arialuni.ttf字体对我有用,到目前为止我检查了它的支持

BG, ES, CS, DA, DE, ET, EL, EN, FR, IT, LV, LT, HU, MT, NL, PL, PT, RO, SK, SL, FI, SV

并且只有罗马尼亚语的PDF没有正确创建...

使用PDFBox它几乎是一样的:

private void createPdfBoxDoc() throws IOException, FileNotFoundException, COSVisitorException {
    PDDocument document = new PDDocument();
    PDPage page = new PDPage();
    document.addPage(page);
    PDPageContentStream contentStream = new PDPageContentStream(document, page);

    PDFont font = PDTrueTypeFont.loadTTF(document, "fonts/arialuni.ttf");
    contentStream.setFont(font, 12);
    contentStream.beginText();
    contentStream.moveTextPositionByAmount(100, 400);
    contentStream.drawString("š");
    contentStream.endText();
    contentStream.close();
    document.save("test.pdf");
    document.close();
}

然而正如Gagravarr所说,由于这个问题PDFBOX-903,它不起作用.即使有1.6.0-SNAPSHOT版本.也许干线会起作用.我建议你使用iText.它完美地在那里工作.