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我正在尝试在使用 PDFBox 生成的 pdf 文件中显示阿拉伯字符串,实际上我可以使用 ICU4J 和特定字体显示来自 RTL 的阿拉伯字符串,但问题是这样的:即使字符串从 RTL 中正确显示,字符仍然分开即使我尝试了一些字体,问题还没有解决。这是用于测试的代码片段:

     PDDocument document = new PDDocument();
     PDPage page = new PDPage(PDRectangle.A4);
     document.addPage(page);

     String dir = "resources/fonts/";
     //I've used several fonts
     PDType0Font farialUni = PDType0Font.load(document, new File(dir + "ARIALUNI.ttf"));
     PDFont fArabType = PDType0Font.load(document, new File(dir + "arabtype.ttf"));
     PDFont fMuka = PDType0Font.load(document, new File(dir + "Mukadimah.ttf"));
     PDFont fFreeSans = PDType0Font.load(document, new File(dir + "FreeSans.ttf"));
     PDFont fNoto = PDType0Font.load(document, new File(dir + "NotoNaskhArabic-Regular.ttf"));

     PDPageContentStream stream = new PDPageContentStream(document, page);

     stream.beginText();
     stream.setFont(fNoto, 12);
     stream.setLeading(12 * 1.2);

     stream.newLineAtOffset(100, 800);
     //Switch text order from to RTL
     BiDiClass bidiClass = new BiDiClass();
     String arabicText = "\u0627\u0644\u0633\u0644\u0627\u0645 \u0639\u0644\u064A\u0643\u0645 ";

     //Use icu to inverse the order
     String out = bidiClass.makeLineLogicalOrder(arabicText, true);
     System.out.println(out);

     stream.showText(out);
     stream.newLine();

     // ligature
     stream.showText(out);

     stream.endText();
     stream.close();


     document.save("example.pdf");
     document.close();

这段代码给我的结果字符串是这样的: ال س ل ام ع ل ي ك م </p>

注意:我在结果字符串中添加空格字符只是为了清楚起见。

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