Java Requires Chilkat v11.7.0+

Replace PDF Text on Selected Pages Only

See more PDF Text Replacement Examples

Demonstrates the "pages" option, which limits the search for placeholders and labels to the given pages: "all" (the default), "first", "last", "odd", "even", or a list such as "1,3,5-9". The two-page order confirmation carries the same "Status:" label on both pages; the status is changed on page 2 only, then on both pages. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  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 order_confirmation.pdf

    CkPdf pdf = new CkPdf();
    success = pdf.LoadFile("qa_data/pdf/order_confirmation.pdf");
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    CkJsonObject json = new CkJsonObject();
    CkJsonObject jsonOut = new CkJsonObject();

    //  Both pages have "Status:   Pending".  With pages "2", only page 2 is searched.
    json.UpdateString("pages","2");
    json.UpdateString("labels[0].label","Status:");
    json.UpdateString("labels[0].value","Shipped");
    success = pdf.TextReplace("check",json,jsonOut);
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    System.out.println("pages 2: found on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    //  With every page searched, the default occurrence ("first") still replaces one -- the first in reading order.
    json.UpdateString("pages","all");
    success = pdf.TextReplace("check",json,jsonOut);
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    System.out.println("pages all, first occurrence: found on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    //  Every occurrence on every page.
    json.UpdateString("labels[0].occurrence","all");
    success = pdf.TextReplace("apply",json,jsonOut);
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    System.out.println("pages all, every occurrence: " + jsonOut.IntOf("replacements[0].count") + " replaced on page(s) " + jsonOut.stringOf("replacements[0].pages"));

    success = pdf.WriteFile("qa_output/order_shipped.pdf");
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    //  Sample output:

    //  pages 2: found on page(s) 2
    //  pages all, first occurrence: found on page(s) 1
    //  pages all, every occurrence: 2 replaced on page(s) 1,2
  }
}