Adding Header and Footer to PDF in Java

adding-header-footer-to-pdf-pages.java

import org.apache.pdfbox.pdmodel.*;
import org.apache.pdfbox.pdmodel.font.*;
import org.apache.pdfbox.pdmodel.common.*;
import org.apache.pdfbox.pdmodel.graphics.image.*;
import java.io.File;

public class PDFHeaderFooter {
    public static void main(String[] args) throws IOException {
        // 1. Load existing PDF or create new
        PDDocument document = PDDocument.load(new File("input.pdf"));
        
        // 2. Define header/footer styling
        PDFont font = PDType1Font.HELVETICA_BOLD;
        float fontSize = 10;
        float margin = 30;
        float headerY = document.getPage(0).getMediaBox().getHeight() - margin;
        float footerY = margin;
        
        // 3. Process each page
        for (int i = 0; i < document.getNumberOfPages(); i++) {
            PDPage page = document.getPage(i);
            PDRectangle pageSize = page.getMediaBox();
            
            // 4. Add header
            try (PDPageContentStream headerStream = new PDPageContentStream(
                    document, page, 
                    PDPageContentStream.AppendMode.APPEND, true)) {
                
                headerStream.beginText();
                headerStream.setFont(font, fontSize);
                headerStream.setNonStrokingColor(0, 0, 0); // Black color
                
                // Left-aligned header
                headerStream.newLineAtOffset(margin, headerY);
                headerStream.showText("Confidential Document");
                
                // Right-aligned header
                String headerRight = "Page " + (i + 1) + " of " + document.getNumberOfPages();
                float textWidth = font.getStringWidth(headerRight) / 1000 * fontSize;
                headerStream.newLineAtOffset(pageSize.getWidth() - margin * 2 - textWidth, 0);
                headerStream.showText(headerRight);
                headerStream.endText();
            }
            
            // 5. Add footer
            try (PDPageContentStream footerStream = new PDPageContentStream(
                    document, page, 
                    PDPageContentStream.AppendMode.APPEND, true)) {
                
                footerStream.beginText();
                footerStream.setFont(font, fontSize);
                footerStream.setNonStrokingColor(100, 100, 100); // Gray color
                
                // Centered footer
                String footerText = "© 2024 Your Company | " + new java.util.Date();
                float footerWidth = font.getStringWidth(footerText) / 1000 * fontSize;
                footerStream.newLineAtOffset((pageSize.getWidth() - footerWidth) / 2, footerY);
                footerStream.showText(footerText);
                footerStream.endText();
            }
        }
        
        // 6. Save modified PDF
        document.save("output_with_headers.pdf");
        document.close();
        System.out.println("Headers/footers added successfully!");
    }
}