如何使用Java iText检查所有使用的字体是否已嵌入PDF？

如何使用Java iText检查所有使用的字体是否已嵌入PDF？

看一下iText in Action中的ListUsedFonts示例。

http://itextpdf.com/examples/iia.php?id=287

看起来这将打印出pdf中使用的字体以及嵌入的字体。

package part4.chapter16;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintWriter;import java.util.Set;import java.util.TreeSet;import part3.chapter11.FontTypes;import com.itextpdf.text.documentException;import com.itextpdf.text.pdf.PdfDictionary;import com.itextpdf.text.pdf.PdfName;import com.itextpdf.text.pdf.PdfReader;public class ListUsedFonts {        public static String RESULT        = "results/part4/chapter16/fonts.txt";        public Set<String> listFonts(String src) throws IOException {        Set<String> set = new TreeSet<String>();        PdfReader reader = new PdfReader(src);        PdfDictionary resources;        for (int k = 1; k <= reader.getNumberOfPages(); ++k) { resources = reader.getPageN(k).getAsDict(PdfName.RESOURCES); processResource(set, resources);        }        reader.close();        return set;    }        public static void processResource(Set<String> set, PdfDictionary resource) {        if (resource == null) return;        PdfDictionary xobjects = resource.getAsDict(PdfName.XOBJECT);        if (xobjects != null) { for (PdfName key : xobjects.getKeys()) {     processResource(set, xobjects.getAsDict(key)); }        }        PdfDictionary fonts = resource.getAsDict(PdfName.FONT);        if (fonts == null) return;        PdfDictionary font;        for (PdfName key : fonts.getKeys()) { font = fonts.getAsDict(key); String name = font.getAsName(PdfName.baseFONT).toString(); if (name.length() > 8 && name.charAt(7) == '+') {     name = String.format("%s subset (%s)", name.substring(8), name.substring(1, 7)); } else {     name = name.substring(1);     PdfDictionary desc = font.getAsDict(PdfName.FONTDEscriptOR);     if (desc == null)         name += " nofontdescriptor";     else if (desc.get(PdfName.FONTFILE) != null)         name += " (Type 1) embedded";     else if (desc.get(PdfName.FONTFILE2) != null)         name += " (TrueType) embedded";     else if (desc.get(PdfName.FONTFILE3) != null)         name += " (" + font.getAsName(PdfName.SUBTYPE).toString().substring(1) + ") embedded"; } set.add(name);        }    }        public static void main(String[] args) throws IOException, documentException {        new FontTypes().createPdf(FontTypes.RESULT);        Set<String> set = new ListUsedFonts().listFonts(FontTypes.RESULT);        PrintWriter out = new PrintWriter(new FileOutputStream(RESULT));        for (String fontname : set) out.println(fontname);        out.flush();        out.close();    }}