Question

我尝试调整代码以将PDF中的页码添加到PDF / A.

如果我不添加PdfTemplate的添加，我添加了字体，配色方案和PDF / A创作。

// PDF is created successfully when this part is removed
// Though without the page number in the header
PdfPCell cell = new PdfPCell(Image.getInstance(total));
cell.setBorder(Rectangle.BOTTOM);
table.addCell(cell);"

虽然我真的很喜欢带有页码的标题。我没有线索如何将字体添加到PdfPCell。对于其他字段，我通常会添加一个短语或段落，我可以提供我的字体。

抛出的错误是：Exception in thread "main" com.itextpdf.text.DocumentException: com.itextpdf.text.pdf.PdfAConformanceException: All the fonts must be embedded. This one isn't: Helvetica at com.itextpdf.text.pdf.PdfDocument.add(PdfDocument.java:809)

public class MovieCountries1 {

/**
 * The resulting PDF file.
 */
public static final String RESULT
    = "d:/tmp/pdf/movie_countries1.pdf";

private static final String FONT_LOCATION = "./fonts/arial.ttf";

public static Font fontArial = FontFactory.getFont(FONT_LOCATION, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

/**
 * Inner class to add a table as header.
 */
class TableHeader extends PdfPageEventHelper {
/**
 * The header text.
 */
String header;
/**
 * The template with the total number of pages.
 */
PdfTemplate total;

/**
 * Allows us to change the content of the header.
 *
 * @param header The new header String
 */
public void setHeader(String header) {
    this.header = header;
}

/**
 * Creates the PdfTemplate that will hold the total number of pages.
 *
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(
 *com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
 */
public void onOpenDocument(PdfWriter writer, Document document) {
    total = writer.getDirectContent().createTemplate(30, 16);
}

/**
 * Adds a header to every page
 *
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(
 *com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
 */
public void onEndPage(PdfWriter writer, Document document) {
    PdfPTable table = new PdfPTable(3);
    try {
    table.setWidths(new int[]{24, 24, 2});
    table.setTotalWidth(527);
    table.setLockedWidth(true);
    table.getDefaultCell().setFixedHeight(20);
    table.getDefaultCell().setBorder(Rectangle.BOTTOM);
    table.addCell(header);
    table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
    table.addCell(String.format("Page %d of", writer.getPageNumber()));

    //PDF is created successfully when this part is removed
    //Though without the page number in the header
    PdfPCell cell = new PdfPCell(Image.getInstance(total));
    cell.setBorder(Rectangle.BOTTOM);
    table.addCell(cell);

    table.writeSelectedRows(0, -1, 34, 803, writer.getDirectContent());
    } catch (DocumentException de) {
    throw new ExceptionConverter(de);
    }
}

/**
 * Fills out the total number of pages before the document is closed.
 *
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onCloseDocument(
 *com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
 */
public void onCloseDocument(PdfWriter writer, Document document) {
    ColumnText.showTextAligned(total, Element.ALIGN_LEFT,
        new Phrase(String.valueOf(writer.getPageNumber() - 1), fontArial),
        2, 2, 0);
}
}

/**
 * Creates a PDF document.
 *
 * @param filename the path to the new PDF document
 * @throws DocumentException
 * @throws IOException
 * @throws SQLException
 */
public void createPdf(String filename)
    throws IOException, DocumentException, SQLException {
// Create a database connection

// step 1
Document document = new Document(PageSize.A4, 36, 36, 54, 36);
// step 2
PdfAWriter writer = PdfAWriter.getInstance(document, new FileOutputStream(RESULT), PdfAConformanceLevel.PDF_A_1A);
//PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(RESULT));

document.addAuthor("Author");
document.addSubject("Subject");
document.addLanguage("nl-nl");
document.addCreationDate();
document.addCreator("Creator");
document.addTitle("Title");

writer.setPdfVersion(PdfName.VERSION);
writer.setTagged();
writer.createXmpMetadata();

TableHeader event = new TableHeader();
writer.setPageEvent(event);
// step 3
document.open();
// step 4
List<Movie> movies = composeMovies();
for (int i = 0; i < 10; i++) {
    for (Movie movie : movies) {
    document.add(new Paragraph(movie.getMovieTitle(), fontArial));
    if (movie.getOriginalTitle() != null)
        document.add(new Paragraph(movie.getOriginalTitle(), fontArial));
    final String format = String.format("Year: %s; run length: %s minutes",
        movie.getYear(), movie.getDuration());
    document.add(new Paragraph(format, fontArial));
    }
}

// step 4
final String colorProfile = "/color/sRGB_Color_Space_Profile.icm";
final InputStream resourceAsStream = this.getClass().getResourceAsStream(colorProfile);
ICC_Profile icc = ICC_Profile.getInstance(resourceAsStream);
writer.setOutputIntents("Custom", "", "http://www.color.org", "sRGB IEC61966-2.1", icc);
document.close();
}

private List<Movie> composeMovies() {
List<Movie> movies = new ArrayList<>();
final Movie movie1 = new Movie();
movie1.setYear("2012");
movie1.setMovieTitle("movieTitle1");
movie1.setOriginalTitle("originalTitle1");
movie1.setDuration("1h");
final Movie movie2 = new Movie();
movie2.setYear("2013");
movie2.setMovieTitle("movieTitle2");
movie2.setOriginalTitle("originalTitle2");
movie2.setDuration("2h");
movies.add(movie1);
movies.add(movie2);
return movies;
}

/**
 * Main method.
 *
 * @param args no arguments needed
 * @throws DocumentException
 * @throws IOException
 * @throws SQLException
 */
public static void main(String[] args)
    throws IOException, DocumentException, SQLException {
new MovieCountries1().createPdf(RESULT);
}

}

Answer 1

请看一下这一行：

table.addCell(String.format("Page %d of", writer.getPageNumber()));

在此行中，您可以直接向String添加table。在内部，创建了PdfPCell，以及Phrase对象。由于没有定义字体，因此使用默认字体（Helvetica，unmbedded）。

请将以上一行改为：

table.addCell(new Phrase(String.format("Page %d of", writer.getPageNumber()), fontArial);

这将解决一个问题（除非我忽略了引入默认字体的其他实例）。如果你想要PDF / A A级，还会有其他例外。

我编写了一个基于CSV文件创建PDF / A文档的示例。我在本文档中添加了一个页脚重用您的页面事件实现：PdfA1A

您遇到的问题可以解释如下：当您告诉PdfWriter需要创建标记PDF（使用writer.setTagged();）时，iText将确保在创建时创建相应的标记将Element个对象添加到document。只要你坚持使用高级对象，这就行了。

但是，当您引入在绝对位置添加的对象时，您有责任正确标记您添加的任何内容。在您的情况下，您正在添加页脚。页脚不属于＆＃34;真实内容＆＃34;，因此需要将其标记为＆＃34;工件＆＃34;。

在我的示例中，我以一种允许我解释两种不同方法的方式调整了您的页面事件实现：

在第一种方法中，我将角色设置在对象的级别：

Image total = Image.getInstance(t);
total.setRole(PdfName.ARTIFACT);

在第二种方法中，我将内容标记为最低级别的工件：

PdfContentByte canvas = writer.getDirectContent();
canvas.beginMarkedContentSequence(PdfName.ARTIFACT);
table.writeSelectedRows(0, -1, 36, 30, canvas);
canvas.endMarkedContentSequence();

我对PdfPTable使用第二种方法，因为如果我不这样做，我必须将表的所有子元素（每一行）标记为工件。如果我没有，iText会在工件中引入TR个元素（这是错误的）。

有关完整的源代码，请参阅http://itextpdf.com/sandbox/pdfa/PdfA1A。

PDF / A中标题中的iText页码

1 个答案: