我想将页眉图像和页码作为页脚添加到我的PDF文件中。如何使用Itext将页眉和页脚添加到我的PDF文件中？
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.Header;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;
public class Demo {
/**
* @param args
*/
public static void main(String[] args) {
new Demo().createPDF();
}
public void createPDF(){
Document document = new Document (PageSize.A4);
try {
PdfWriter.getInstance(document, new FileOutputStream("C:/Documents and Settings/mnavya/Desktop/AddImage.pdf"));
document.open ();
document.addCreator("Binod by Demo.java");
document.addAuthor("Binod Suman");
document.addTitle("First PDF By Binod");
Image image = Image.getInstance("https://snaplogic-h.s3.amazonaws.com/uploads/partner/logo/24/stratappa.jpg?u=1382443264");
image.scaleAbsolute(50,50);
document.add(image);
Paragraph paragraph = new Paragraph(
" Factors",new Font(Font.FontFamily.HELVETICA, 25));
document.add(paragraph);
document.add(Chunk.SPACETABBING);
PdfPTable table = new PdfPTable(8);
table.setWidthPercentage(100);
float[] columnWidths = new float[] { 7, 20, 9, 9, 9, 9, 5, 3 };
table.setWidths(columnWidths);
PdfPCell cell = new PdfPCell();
cell.setColspan(8);
cell.setBackgroundColor(BaseColor.LIGHT_GRAY);
table.addCell(cell);
table.addCell(" ");
table.addCell(" ");
table.addCell("");
table.addCell("");
table.addCell("%");
table.addCell("");
table.addCell(" ");
table.addCell(" ");
document.add(table);
document.close ();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
System.out.println("******** PDF Created ***************");
}
}
页脚页眉实用程序：
import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;
public class HeaderFooterPageEvent extends PdfPageEventHelper {
public void onStartPage(PdfWriter writer, Document document) {
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase("Top Left"), 30, 800, 0);
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase("Top Right"), 550, 800, 0);
}
public void onEndPage(PdfWriter writer, Document document) {
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase("http://www.xxxx-your_example.com/"), 110, 30, 0);
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase("page " + document.getPageNumber()), 550, 30, 0);
}
}
使用HeaderFoterPageEvent：
ByteArrayOutputStream bos = new ByteArrayOutputStream();
Document document = new Document(PageSize.A4, 20, 20, 50, 25);
PdfWriter writer = PdfWriter.getInstance(document, baos);
HeaderFooterPageEvent event = new HeaderFooterPageEvent();
writer.setPageEvent(event);
编辑（添加图像样本）：
public void onStartPage(PdfWriter writer, Document document) {
String img = APPLICATION_SERVER_ROOT_PATH + File.separator + "assets" + File.separator + "images" + File.separator + "logo-tp-white.png";
Image image;
try {
image = Image.getInstance(img);
image.setAlignment(Element.ALIGN_RIGHT);
image.setAbsolutePosition(20, 790);
image.scalePercent(7.5f, 7.5f);
writer.getDirectContent().addImage(image, true);
} catch (IOException | DocumentException e) {
log.error("L'image logo-tp-50x50.png a provoqué une erreur.", e);
}
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase(""), 30, 800, 0);
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_CENTER, new Phrase(Constants.GLOBAL_HOST + " pour réussir votre prochain concours."), 400, 800, 0);
}
HeaderFooter event = new HeaderFooter();
writer.setBoxSize("art", new Rectangle(36, 54, 559, 788));
writer.setPageEvent(event);
文件itxt
EjemploPDF示例
在StackOverflow上发布问题之前，请查看官方iText留档。更具体地说：检查关键字页眉/页脚的示例。
您将找到MovieCountries1示例，该示例创建了一个带有页码Page 1/39、Page 2/39等页眉的PDF。
用这个例子作为灵感。如果你不需要Y页眉（或页脚）的X页。你可以使用一个更简单的例子，比如如何使用iTextLibrary在动态pdf中添加页眉和页脚？答案中的那个（这也是受我书中一个例子的启发）。
