Java Requires Chilkat v11.7.0+

Put a Letterhead Behind the First Page of a PDF

See more PDF Watermark Examples

Demonstrates the pdfPage type, which places a page of another PDF as the watermark. It is the way to use a letterhead, a cover overlay or a vector logo that was saved as a PDF, and unlike an image it stays sharp at any size because it is drawn, not resampled. "zOrder" set to back puts it behind the existing content, where a letterhead belongs, and "pages" set to first restricts it to page one. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Pdf;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // The PDF used in this example is available at two_page_memo.pdf

        // The PDF used in this example is available at letterhead.pdf

        Pdf pdf = new Pdf();
        try {
            pdf.loadFile("qa_data/pdf/two_page_memo.pdf");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        JsonObject json = new JsonObject();
        json.updateString("type", "pdfPage");
        json.updateString("pdf.path", "qa_data/pdf/letterhead.pdf");

        // The page of the source PDF to use (1 by default).  "match" instead of a number places source
        // page n on target page n, which suits a set of per-page backgrounds.
        json.updateInt("pdf.page", 1);

        // Behind the memo's own text, on page one, scaled to the page.
        json.updateString("zOrder", "back");
        json.updateString("pages", "first");
        json.updateString("scale.fit", "page");
        json.updateString("id", "letterhead");

        JsonObject jsonOut = new JsonObject();
        try {
            pdf.watermark("add", json, jsonOut);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("id: " + jsonOut.stringOf("id") + " pages: " + jsonOut.stringOf("pages"));

        try {
            pdf.writeFile("qa_output/memo_letterhead.pdf");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Sample output:

        // id: letterhead pages: 1
    }
}