我有一个带有复选标记和当前日期的邮票。 我需要使用itext和java将此邮票添加到pdf的所有页面中

Question

我有一张上面有复选标记和当前日期的邮票。
我需要在使用itext和java的按钮上单击时，将此邮票添加到pdf中的所有页面。
印章是一种具有文本字段的表单，其中使用javascript自动输入日期。

PdfReader reader = new PdfReader(src);
PdfReader s_reader = new PdfReader(stationery);
// Create the stamper
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
// Add the stationery to each page
PdfImportedPage page = stamper.getImportedPage(s_reader, 1);
int n = reader.getNumberOfPages();
PdfContentByte background;
for (int i = 1; i <= n; i++) {
    background = stamper.getUnderContent(i);
    background.addTemplate(page, 0, 0);
}
// Close the stamper
stamper.close();
reader.close();
s_reader.close();

现在，如何从pdf中获取该保存的图章（窗体），为其添加当前日期，以及如何将该图章添加到Pdf文档的所有页面上？
需要JavaScript吗？

Answer 1

创建pdf

private static final Font headerFont = new Font(Font.FontFamily.TIMES_ROMAN, 9,
            Font.BOLD, BaseColor.BLACK);
Document document = new Document(PageSize.A4, 20, 20, 120, 50);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(realPath + "/PdfTable.pdf"));
        writer.setBoxSize("art", new Rectangle(36, 54, 559, 788));
        HeaderFooterOfPdf event = new HeaderFooterOfPdf(batchDate);
        writer.setPageEvent(event);
        document.open();
//to create table
PdfPTable vppTable = new PdfPTable(new float[]{3, 7, 9, 3, 5, 3, 3, 3, 4});
        vppTable.setWidthPercentage(100f);
//pdf table header
        vppTable.addCell(new PdfPCell(new Phrase("Your column name", headerFont)));
        vppTable.addCell(new PdfPCell(new Phrase("Your column name", headerFont)));
        vppTable.setHeaderRows(1);

//to add cell data
PdfPCell slNoCell = new PdfPCell(new Phrase("your data", contentFont));
            slNoCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            slNoCell.setPaddingLeft(15f);
            vppTable.addCell(slNoCell);

document.add(vppTable);
document.close();

HeaderFooterOfPdf类

public class HeaderFooterOfPdf extends PdfPageEventHelper{

public HeaderFooterOfPdf(String batchDate){
        this.batchDate = batchDate;
    }

@Override
    public void onOpenDocument(PdfWriter writer, Document document) {
    }

@Override
    public void onStartPage(PdfWriter writer, Document document) {
//do what you want to enter on header
}

@Override
    public void onEndPage(PdfWriter writer, Document document) {
//do what you want to enter on footer
}
}

Answer 2

    import java.io.ByteArrayOutputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;

import java.util.*;  
import java.util.Set;  
import java.util.TreeSet;

import java.text.*;

//itext libraries to read & write to a PDF file
import com.itextpdf.text.*;  
import com.itextpdf.text.pdf.*;  
import com.itextpdf.text.pdf.PdfReader;  
import com.itextpdf.text.pdf.PdfPageEventHelper;  
import com.itextpdf.text.pdf.PdfWriter;  
import com.itextpdf.text.Document;  
import com.itextpdf.text.DocumentException;  
import com.itextpdf.text.Rectangle;  
import com.itextpdf.text.BaseColor;  
import com.itextpdf.text.Element;  
import com.itextpdf.text.Paragraph;  
import com.itextpdf.text.Phrase;  
import com.itextpdf.text.Font;  
import com.itextpdf.text.Image;  
import com.itextpdf.text.Font.FontFamily;  
import com.itextpdf.text.pdf.PdfPTable;    
import com.itextpdf.text.pdf.PdfReader;    
import com.itextpdf.text.pdf.PdfStamper;    
import com.itextpdf.text.pdf.PdfWriter;  


public class TwoPasses1  
{  
   public static final String RESULT = "K:\\DCIN_TER\\DCIN_EPU2\\CIRCUIT FROM BRANCH\\RAINBOW ORDERS\\111111\\PADR Release\\Final PADR Release 1.pdf";

         public static void main(String[] args) throws DocumentException, IOException
        {
         // ADD THE FOOTER, Create a reader
         PdfReader reader = new PdfReader("K:\\DCIN_TER\\DCIN_EPU2\\CIRCUIT FROM BRANCH\\RAINBOW ORDERS\\111111\\PADR Release\\Final PADR Release.pdf");

         // Create a stamper
         PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(RESULT));

         // Loop over the pages and add a footer to each page
         int n = reader.getNumberOfPages();

         for(int i = 1; i <= n; i++)
                {
                         getFooterTable(i, n).writeSelectedRows(0, -1, 34, 80, stamper.getOverContent(i));

                        // getFooterTable(i, n).writeSelectedRows(0, -1, 34, 803, stamper.getOverContent(i));
         }

         // Close the stamper
         stamper.close();

         reader.close();
         }

        public static PdfPTable getFooterTable(int x, int y)
        {
         java.util.Date date = new java.util.Date();

                SimpleDateFormat sdf = new SimpleDateFormat("dd MMM yyyy");

                String month = sdf.format(date);
                System.out.println("Month : " + month);

                PdfPTable table = new PdfPTable(1);

         table.setTotalWidth(150);
         table.setLockedWidth(true);

         table.getDefaultCell().setFixedHeight(20);
         table.getDefaultCell().setBorder(Rectangle.TOP);
         table.getDefaultCell().setBorder(Rectangle.LEFT);
         table.getDefaultCell().setBorder(Rectangle.RIGHT);
         table.getDefaultCell().setBorderColorTop(BaseColor.BLUE);
         table.getDefaultCell().setBorderColorLeft(BaseColor.BLUE);
         table.getDefaultCell().setBorderColorRight(BaseColor.BLUE);
         table.getDefaultCell().setBorderWidthTop(2f);
         table.getDefaultCell().setBorderWidthLeft(2f);
         table.getDefaultCell().setBorderWidthRight(2f);

         table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);

                Font font1 = new Font(FontFamily.HELVETICA, 12, Font.BOLD, BaseColor.BLUE);

         table.addCell(new Phrase("CONTROLLED COPY", font1));

         table.getDefaultCell().setFixedHeight(20);
         table.getDefaultCell().setBorder(Rectangle.LEFT);
         table.getDefaultCell().setBorder(Rectangle.RIGHT);
         table.getDefaultCell().setBorderColorLeft(BaseColor.BLUE);
         table.getDefaultCell().setBorderColorRight(BaseColor.BLUE);
         table.getDefaultCell().setBorderWidthLeft(2f);
         table.getDefaultCell().setBorderWidthRight(2f);

         table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);

                Font font = new Font(FontFamily.HELVETICA, 12, Font.BOLD, BaseColor.RED);

         table.addCell(new Phrase(month, font));

         table.getDefaultCell().setFixedHeight(20);
         table.getDefaultCell().setBorder(Rectangle.LEFT);
         table.getDefaultCell().setBorder(Rectangle.RIGHT);
         table.getDefaultCell().setBorder(Rectangle.BOTTOM);
         table.getDefaultCell().setBorderColorLeft(BaseColor.BLUE);
         table.getDefaultCell().setBorderColorRight(BaseColor.BLUE);
         table.getDefaultCell().setBorderColorBottom(BaseColor.BLUE);
         table.getDefaultCell().setBorderWidthLeft(2f);
         table.getDefaultCell().setBorderWidthRight(2f);
         table.getDefaultCell().setBorderWidthBottom(2f);

         table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);

         table.addCell(new Phrase("BLR DESIGN DEPT.", font1));

         return table;
         }
}