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我无法使用 itext 在 pdf 中打印中文日文字符。我正在使用 xmlWorker 在单个字符串中转换包含中文、日文和韩文字符的 HTML。但是尽管我使用 xmlFontProvider 注册了字体，但我在 pdf 中得到了空格。

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.Charset;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import com.itextpdf.tool.xml.XMLWorkerHelper;

public class ParseHtml11 {
    public static final String DEST = "cyrillic.pdf";
    public static final String HTML = "<html><head>    <meta http-equiv='content-type' content='application/xhtml+xml; charset=UTF-8'/></head><body><h4 style='font-family: Arial Unicode MS, FreeSans; font-size:16px; font-weight: normal; ' >Здраво Kristijan!</h4><p>This is chinese language test 测试 </p></body></html>";



    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);

        new ParseHtml11().createPdf(DEST);
    }

    /**
     * Creates a PDF with the words "Hello World"
     * @param file
     * @throws IOException
     * @throws DocumentException
     */
    public void createPdf(String file) throws IOException, DocumentException {
        // step 1
        Document document = new Document();
        // step 2
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
        // step 3
        document.open();
        // step 4
        XMLWorkerFontProvider fontImp = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
        fontImp.register("/Users/user/Downloads/MyFonts/FreeSans.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/THSarabunNew.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/Kh-Content.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/THSarabunNew Italic.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/THSarabunNew BoldItalic.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/THSarabunNew Bold.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/arial.ttf");
        fontImp.register("/Users/user/Downloads/MyFonts/FreeSans.ttf");
        fontImp.register( "/Users/user/Downloads/MyFonts/NotoSansCJKsc-Regular.otf");
        fontImp.register( "/Users/user/Downloads/MyFonts/arialuni.ttf");
        XMLWorkerHelper.getInstance().parseXHtml(writer, document,
                new ByteArrayInputStream((HTML.toString().getBytes("UTF-8"))), null, Charset.forName("UTF-8"), fontImp);
        // step 5
        document.close();
    }
}
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