gistfile1.java

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
// we create a reader for a certain document
PdfReader reader = new PdfReader(pdfYExcelStream);

Rectangle psize = reader.getPageSize(1); 
System.out.println("tamaño pdf original   "+psize);
// we retrieve the total number of pages and the page size
//int total = reader.getNumberOfPages();

/*Rectangle pageSize = reader.getPageSize(1);
Rectangle newSize = new Rectangle(pageSize.getWidth() / 2,
pageSize.getHeight());*/
// step 1: creation of a document-object
Document document = new Document(PageSize.A4); //new Document(newSize, 0, 0, 0, 0);
reader.getPageContent(1);
//document.setPageSize(PageSize.A4.rotate());

// step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
writer.addPageDictEntry(PdfName.ROTATE, PdfPage.LANDSCAPE);
//writer.setPageEvent(new RotateEvent());

// step 3: we open the document
document.open();

// step 4: adding the content
PdfContentByte cb = writer.getDirectContent();
PdfImportedPage page = writer.getImportedPage(reader, 1);


System.out.println("direccion    "+writer.getPageDictEntries());

//System.out.println("tamaño general: "+document.getPageSize().getHeight());

/*document.newPage();
cb.addTemplate(page, 0, 0);*/

int cantidadPaginas =  Math.round( psize.getWidth() / 800 );
System.out.println("chancho!! "+page.getWidth());
System.out.println("cantidad paginas    " + cantidadPaginas);
System.out.println("hancho original!! "+psize.getWidth());

//System.out.println("a4 original:"+psize.getWidth());
//System.out.println("a4 new:"+document.getPageSize().getWidth());

//System.out.println("paginas---->"+document.getPageSize().getWidth()/psize.getWidth());

//System.out.println("paginas222---->"+psize.getWidth() / document.getPageSize().getWidth());

/*for(cantidadPaginas = 0; document.getPageSize().getHeight() < psize.getWidth();cantidadPaginas++){
System.out.println("paginas..."+cantidadPaginas);
}*/

//document.setPageSize(PageSize.A4.rotate());
/*document.newPage();
cb.addTemplate(page, 0, -100);

document.newPage();
cb.addTemplate(page, 0, -200);*/

//System.out.println("hacho del original" + psize.getWidth());

//document.newPage();
//cb.addTemplate(page, 1, 0, 0, 1, 0, 0);
document.setPageSize(PageSize.A4.rotate()); //-document.getPageSize().getWidth()
document.newPage();
AffineTransform afinit = new AffineTransform(0, -1, 1, 0, -32800, 600); // equivale a 11 paginas mas!
cb.addTemplate(page,afinit);

double total = 0d;

total = psize.getWidth();

/////////////////////////////////////////

int totalAnchoDePaginas = 800*cantidadPaginas;

System.out.println("total del ancho de las paginas!!" + totalAnchoDePaginas);

//int anchoPagina = totalAnchoDePaginas;

int anchoPorPagina = totalAnchoDePaginas + 800;

int tt = -32800 - 800;

for(int p = 1; p <=totalAnchoDePaginas; p++){

tt = tt + 800;
System.out.println(tt);

document.setPageSize(PageSize.A4.rotate());
document.newPage();
AffineTransform af = new AffineTransform(0, -1, 1, 0, tt, 600);
cb.addTemplate(page, af);

if(tt == 0){
break;
}

//total = total - document.getPageSize().getWidth();

//total = total2 - total;

//System.out.println("total-->"+total);
/*document.setPageSize(PageSize.A4.rotate());
document.newPage();
//document.setMarginMirroring(true);
document.setMargins(0, 0, 0, 0);
AffineTransform af = new AffineTransform(0, -1, 1, 0, -(int)total, 600);
cb.addTemplate(page, af);*/
}


//PdfImportedPage lastpage = writer.getImportedPage(reader,cantidadPaginas);
//lastpage.
//document.setPageSize(PageSize.A4.rotate());
//document.newPage();
//cb.addTemplate(page,0,0,1,-1,10,10);

//cb.addTemplate(page, 0, 0);

//double A_4 = document.getPageSize().getWidth();

//double w_inicial = -psize.getWidth();
//double total = 0d;

/*for(int p = 1; p <cantidadPaginas; p++){

total = w_inicial - document.getPageSize().getWidth();
System.out.println(total);
document.newPage();
cb.addTemplate(page, 0, (int)total);
}*/

//document.newPage();
//cb.addTemplate(page, -PageSize.A4.getWidth(), 0);

//document.newPage();
// cb.AddTemplate(page, -PageSize.A4.Width, 0);

//float offsetX, offsetY;
//int p;
// int rot;

// PdfDictionary pageDict = new PdfDictionary();

/*for (int i = 0; i < total; i++) {

p = i + 1;
pageSize = reader.getPageSize(p);
newSize = new Rectangle(pageSize.getWidth(),
	pageSize.getHeight() / 2);

document.newPage();
offsetX = 0;
offsetY = -newSize.getHeight() + 1;
page = writer.getImportedPage(reader, p);
cb.addTemplate(page, 1, 0, 0, 1, offsetX, offsetY);

/*document.newPage();
offsetX = 0;
offsetY = 0;
page = writer.getImportedPage(reader, p);
cb.addTemplate(page, 1, 0, 0, 1, offsetX, offsetY);
document.newPage();
offsetX = 0;
offsetY = 60;
page = writer.getImportedPage(reader, p);
cb.addTemplate(page, 1, 0, 0, 1, offsetX, offsetY);*/
// pageDict.put(PdfName.ROTATE, new
// PdfNumber(reader.getPageRotation(p) + 180));
//}
document.close();
writer.flush();
writer.close();
outputStream.close();


ByteArrayOutputStream out = new ByteArrayOutputStream();
out.flush();
out.write(outputStream.toByteArray());
out.close();

// de output a input!!
InputStream is = new ByteArrayInputStream(out.toByteArray());

renderBinary(is, "ReporteDeDistribucionClasesPorHoras.pdf",
"application/pdf", true);