Java Tutorial/PDF/PDF Writer

Add page event listener to PDF writer

import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Iterator;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    MyPdfPageEventHelper tracker = new MyPdfPageEventHelper();
    writer.setPageEvent(tracker);
    document.open();
    document.add(createParagraph("Fox", "Hello lazy dog."));
    document.newPage();
    HashMap lines = tracker.getLines();
    for (Iterator i = lines.keySet().iterator(); i.hasNext();) {
      String speaker = (String) i.next();
      Integer count = (Integer) lines.get(speaker);
      document.add(new Paragraph(speaker + ": " + count.intValue() + " lines."));
    }
    document.close();
  }
  private static Paragraph createParagraph(String speaker, String line) {
    Paragraph p = new Paragraph(18);
    Chunk s = new Chunk(speaker + ": ", new Font(Font.HELVETICA, 12, Font.BOLD));
    s.setGenericTag(speaker);
    p.add(s);
    p.add(line);
    return p;
  }
}
class MyPdfPageEventHelper extends PdfPageEventHelper {
  protected HashMap lines = new HashMap();
  public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
    Integer count = (Integer) lines.get(text);
    if (count == null) {
      lines.put(text, new Integer(1));
    } else {
      lines.put(text, new Integer(count.intValue() + 1));
    }
  }
  public HashMap getLines() {
    return lines;
  }
}

Generates a PDF file (version ith the text "Hello World"

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document(new Rectangle(14400, 14400));
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("HelloWorld_1_6.pdf"));
    writer.setPdfVersion(PdfWriter.VERSION_1_6);
    document.open();
    document.add(new Paragraph("Hello World"));
    document.close();
  }
}

Output to console with PdfWriter

import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter.getInstance(document, System.out);
    document.open();
    document.add(new Paragraph("Hello World"));
    document.close();
  }
}

Pause and resume a writer

import java.awt.Color;
import java.io.FileOutputStream;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Font;
import com.lowagie.text.FontFactory;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writerA = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    PdfWriter writerB = PdfWriter.getInstance(document, new FileOutputStream("3.pdf"));
    document.open();
    Font font = FontFactory.getFont(FontFactory.HELVETICA, 12, Font.UNDERLINE, new Color(0, 0, 255));
    Paragraph p1 = new Paragraph("1");
    Chunk chunk = new Chunk(" 2", font);
    chunk.setRemoteGoto("dog.pdf", "2");
    p1.add(chunk);
    Paragraph p2 = new Paragraph("test");
    writerB.pause();
    document.add(p1);
    writerB.resume();
    document.add(p2);
    writerA.resume();
    writerB.pause();
    document.newPage();
    document.add(new Paragraph("page 2"));
    document.newPage();
    document.add(new Paragraph("page 3"));
    writerB.resume();
    document.close();
  }
}

PdfWriter.AllowCopy | PdfWriter.AllowPrinting

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("1.pdf"));
    writer.setEncryption(PdfWriter.STRENGTH128BITS, "Hello", "World", PdfWriter.AllowCopy
        | PdfWriter.AllowPrinting);
    document.open();
    document.add(new Paragraph("Hello World"));
    document.close();
  }
}

PdfWriter.NO_SPACE_CHAR_RATIO

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document(PageSize.A8.rotate());
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    String text = "this is a test";
    Paragraph paragraph = new Paragraph(text);
    paragraph.setAlignment(Element.ALIGN_JUSTIFIED);
    document.add(paragraph);
    document.newPage();
    writer.setSpaceCharRatio(PdfWriter.NO_SPACE_CHAR_RATIO);
    document.add(paragraph);
    document.close();
  }
}

Set Userunit

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document(new Rectangle(14400, 14400));
    PdfWriter writer = PdfWriter.getInstance(document,
        new FileOutputStream("2.pdf"));
    writer.setPdfVersion(PdfWriter.VERSION_1_6);
    writer.setUserunit(75000f);
    document.open();
    document.add(new Paragraph("Hello World"));
    document.close();
  }
}