Cómo utilizar PDF con Java mediante ITEXT

import java.io.FileOutputStream;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.Font.FontFamily;
import com.itextpdf.text.<strong>pdf</strong>.ColumnText;
import com.itextpdf.text.<strong>pdf</strong>.PdfPCell;
import com.itextpdf.text.<strong>pdf</strong>.PdfPTable;
import com.itextpdf.text.<strong>pdf</strong>.PdfPageEventHelper;
import com.itextpdf.text.<strong>pdf</strong>.PdfWriter;
 
public class Test {
 
//Nombre del fichero <strong>PDF</strong> Resultante de la ejecucion
public static final String RESULT = “Ejemplo1.<strong>pdf</strong>”;
//Titulos
public static final String CHUNK = “CHUNK”;
public static final String PHRASE = “PHRASE”;
public static final String PARAGRAPH = “PARAGRAPH”;
public static final String TABLE = “TABLE”;
public static final String IMAGE = “IMAGE”;
//Textos
public static final String SEPARADOR = “———————————————————————————————————————-”;
public static final String CHUNK1 = “This is the smallest significant part of text that can be added to a document.”;
public static final String CHUNK2 = “Most elements can be divided in one or more Chunks. A chunk is a String with a certain Font. All other layout parameters should be defined in the object to which this chunk of text is added.”;
public static final String PHRASE1 = “A Phrase is a series of Chunks.”;
public static final String CHUNKPHRASE21 = “A Phrase has a main Font,”;
public static final String CHUNKPHRASE22 = ” but some chunks within the phrase can have a Font that differs from the main Font.”;
public static final String CHUNKPHRASE23 = ” All the Chunks in a Phrase  have the same leading.”;
public static final String PARAGRAPH1 = “A Paragraph is a series of Chunks and/or Phrases.”;
public static final String PARAGRAPH2 = “A Paragraph has the same qualities of a Phrase, but also some additional layout-parameters: The indentation AND The alignment of the text”;
 
public static void main (String[] args) {
try
{
//Creacion del documento con un tamaño y unos margenes predeterminados
Document document = new Document(PageSize.A4, 50, 50, 50, 50);
//Al documento se le puede añadir cierta metaInformacion
document.addAuthor(“FJHO”);
document.addTitle(“EJEMPLO1″);
 
//A DocWriter class for PDF con Java.
//When this PdfWriter is added to a certain PdfDocument,
//the <strong>PDF</strong> representation of every Element added to this Document will be written to the outputstream.
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
//LEADING = separacion entre lineas del documento
writer.setInitialLeading(16);
Rectangle rct = new Rectangle(36, 54, 559, 788);
//Definimos un nombre y un tamaño para el PageBox los nombres posibles son: “crop”, “trim”, “art” and “bleed”.
writer.setBoxSize(“art”, rct);
 
//Se crea una instancia de la clase que pinta la cabecera y el pie de pagina y se le asignan los eventos que ocurran en el <strong>PDF</strong>
//La en la clase HeaderFooter se capturarar el evento onEndPage para pintarlos
HeaderFooter event = new HeaderFooter();
writer.setPageEvent(event);
 
//Opens the document.
//You have to open the document before you can begin to add content to the body of the document.
document.open();
//Ejemplos de CHUNKS
//Creamos el CHUNK definiendo su tipo de letra, tamaño…
Chunk titulo = new Chunk(CHUNK, FontFactory.getFont(FontFactory.COURIER, 20, Font.UNDERLINE, BaseColor.BLACK));
//Lo añadimos al documento
document.add(titulo);
//CHUNK predefinido, es un salto de linea
document.add(Chunk.NEWLINE);
Chunk chunkSeparador =  new Chunk(SEPARADOR);
Chunk chunkNormal = new Chunk(CHUNK1);
document.add(chunkNormal);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
Chunk chunkTunning = new Chunk(CHUNK2,FontFactory.getFont(FontFactory.COURIER, 20, Font.ITALIC, BaseColor.GREEN));
document.add(chunkTunning);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
Chunk chunkTunning2 = new Chunk(CHUNK2,new Font(FontFamily.HELVETICA, 6, Font.BOLD, BaseColor.WHITE));
chunkTunning2.setBackground(BaseColor.BLACK, 10f, 10f, 10f, 10f);
document.add(chunkTunning2);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
document.add(chunkSeparador);
//FIN Ejemplos de CHUNKS
//**************************************************************
//Ejemplos de PHRASES
titulo = new Chunk(PHRASE, FontFactory.getFont(FontFactory.COURIER, 20, Font.UNDERLINE, BaseColor.BLACK));
document.add(titulo);
document.add(Chunk.NEWLINE);
Phrase phraseNormal = new Phrase(PHRASE1);
document.add(phraseNormal);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
Phrase phraseTunning = new Phrase(new Chunk(CHUNKPHRASE21));
phraseTunning.add(new Chunk(CHUNKPHRASE22, FontFactory.getFont(FontFactory.COURIER, 5, Font.ITALIC, BaseColor.GREEN)));
phraseTunning.add(new Chunk(CHUNKPHRASE23, FontFactory.getFont(FontFactory.TIMES_ROMAN, 15, Font.BOLD, BaseColor.ORANGE)));
document.add(phraseTunning);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
Phrase phraseConLeading = new Phrase(30, “Todo es la misma frase LEADING de esta PHRASE=100, Todo es la misma frase LEADING de esta PHRASE=100, Todo es la misma frase LEADING de esta PHRASE=100″);
document.add(phraseConLeading);
document.add(Chunk.NEWLINE);
document.add(chunkSeparador);
//FIN Ejemplos de PHRASES
//**************************************************************
//Ejemplos de PARAGRAPH
titulo = new Chunk(PARAGRAPH, FontFactory.getFont(FontFactory.COURIER, 20, Font.UNDERLINE, BaseColor.BLACK));
document.add(titulo);
document.add(Chunk.NEWLINE);
// Añadir parrafo sin formato
document.add(new Paragraph(PARAGRAPH1));
Paragraph par = new Paragraph(PARAGRAPH2);
par.setIndentationLeft(200);
document.add(par);
par = new Paragraph(PARAGRAPH2);
par.setIndentationRight(300);
document.add(par);
// Añadir parrafo en Negrita
par = new Paragraph(PARAGRAPH2);
par.getFont().setStyle(Font.BOLD);
par.setAlignment(Element.ALIGN_CENTER);
document.add(par);
// Añadir parrafo en Cursiva
par = new Paragraph(PARAGRAPH2);
par.getFont().setStyle(Font.ITALIC);
par.setAlignment(Element.ALIGN_RIGHT);
document.add(par);
// Añadir parrafo tunning
par = new Paragraph(PARAGRAPH2,
FontFactory.getFont(“arial”,   // fuente
16,                    // tamaño
Font.ITALIC,           // estilo
BaseColor.RED));       // color
document.add(par);
par.setAlignment(Element.ALIGN_LEFT);
document.add(chunkSeparador);
document.add(Chunk.NEWLINE);
document.add(Chunk.NEWLINE);
//FIN Ejemplos de PARAGRAPH
//**************************************************************
//Ejemplos de TABLE
titulo = new Chunk(TABLE, FontFactory.getFont(FontFactory.COURIER, 20, Font.UNDERLINE, BaseColor.BLACK));
document.add(titulo);
//Añadir tabla 5 columnas
PdfPTable table = new PdfPTable(5);
//Añadir CABECERA
PdfPCell cell = new PdfPCell(new Phrase(“CABECERA”));
cell.setColspan(5);
cell.setBackgroundColor(BaseColor.GREEN);
table.addCell(cell);
//Añadir dos filas de celdas sin formato
table.addCell(“1.1″);
table.addCell(“1.2″);
table.addCell(“1.3″);
table.addCell(“1.4″);
table.addCell(“1.5″);
table.addCell(“2.1″);
table.addCell(“2.2″);
table.addCell(“2.3″);
table.addCell(“2.4″);
table.addCell(“2.5″);
//tunning de Celdas
cell = new PdfPCell(new Phrase(“Alto 3 celdas”));
cell.setRowspan(2);
cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
table.addCell(cell);
table.addCell(“3.1″);
table.addCell(“3.2″);
table.addCell(“3.3″);
table.addCell(“3.4″);
table.addCell(“4.1″);
table.addCell(“4.2″);
table.addCell(“4.3″);
table.addCell(“4.4″);
table.addCell(“5.1″);
cell = new PdfPCell(new Phrase(“Ancho 4 celdas”));
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
cell.setColspan(4);
table.addCell(cell);
document.add(table);
document.add(chunkSeparador);
//FIN Ejemplos de TABLE
//**************************************************************
//Ejemplos de IMAGE
titulo = new Chunk(IMAGE, FontFactory.getFont(FontFactory.COURIER, 20, Font.UNDERLINE, BaseColor.BLACK));
document.add(titulo);
Image foto = Image.getInstance(“resources/ferrari.jpg”);
foto.scaleToFit(100, 100);
foto.setAlignment(Chunk.ALIGN_MIDDLE);
document.add(foto);
//FIN Ejemplos de IMAGE
//**************************************************************
// Cierre del documento
document.close();
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
 
static class HeaderFooter extends PdfPageEventHelper {
 
public void onEndPage (PdfWriter writer, Document document) {
Rectangle rect = writer.getBoxSize(“art”);
//CABECERA
ColumnText.showTextAligned(writer.getDirectContent(),
Element.ALIGN_RIGHT, new Phrase(“<strong>LaMandarinaMecanica</strong>”),
rect.getRight(), rect.getTop(), 0);
//PIE
ColumnText.showTextAligned(writer.getDirectContent(),
Element.ALIGN_CENTER, new Phrase(String.format(“page %d”, writer.getPageNumber())),
(rect.getLeft() + rect.getRight()) / 2, rect.getBottom() – 18, 0);
}
}
}

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.<strong>pdf</strong>.PdfWriter;
 
public class Demo extends HttpServlet {
 
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
 
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
 
/*GENERACION AL VUELO DE <strong>PDF</strong>*/
try {
// Texto que va a ser añadido al <strong>PDF</strong>
String text = “Generacion al Vuelo de un <strong>PDF</strong>”;
 
// Paso 1: Creamos el documento
Document document = new Document();
// Paso 2: Creamos un ByteArrayOutputStream
// todo lo que se escriba en el documento
// se escribe tambien en el ByteArrayOutputStream
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter.getInstance(document, baos);
// Abrimos el documento
document.open();
// Escribimos
document.add(new Paragraph(text));
// Cerramos
document.close();
 
// Hay que configurar las cabeceras para que
//el navegador detecte que es un <strong>PDF</strong>
response.setHeader(“Expires”, “0″);
response.setHeader(“Cache-Control”,
“must-revalidate, post-check=0, pre-check=0″);
response.setHeader(“Pragma”, “public”);
// Configuramos el content type
response.setContentType(“application/<strong>pdf</strong>”);
// Tamaño
response.setContentLength(baos.size());
// Esccribir el ByteArrayOutputStream a el ServletOutputStream
OutputStream os = response.getOutputStream();
baos.writeTo(os);
os.flush();
os.close();
}
catch(com.itextpdf.text.DocumentException e) {
throw new IOException(e.getMessage());
}
}
}