itxt打印多种不同布局、不同纸张大小的PDF

itext打印PDF格式的文件，当需要打印多种页面布局和纸张的时候，可以先 new Page(),然后再setPageSize()即可。
public class PdfDocmentCheck {

public static void main(String[] args){
makePdf();
}

public static void makePdf() {
Rectangle rec = new Rectangle(300f, 127f);
Document document = new Document(rec);
try {
PdfWriter.getInstance(document, new FileOutputStream("d:\\testDoc.pdf"));
document.open();
for(int i=0; i<5; i++){
//Rectangle rec = PageSize.A4.rotate();
//if(i!=0 && i%2!=0) rec = PageSize.A4;
if(i!=0 && i%2!=0) rec = rec.rotate();
changeDocument(document, rec);
printTable(document);
}
document.close();
} catch (Exception e) {
e.printStackTrace();
}
}

private static void changeDocument(Document doc, Rectangle rec)throws Exception{
doc.newPage();
doc.setPageSize(rec);
}

private static void printTable(Document doc)throws Exception{
Table titleTable = new Table(2); //this is number col of table
titleTable.setWidth(100f);
titleTable.setWidths( new float[] {30f,70f} );
titleTable.setBorder(Rectangle.NO_BORDER);
titleTable.setSpacing(15f);

BaseFont charbf = BaseFont.createFont("HeiseiKakuGo-W5", "UniJIS-UCS2-H",false);
Cell cell = new Cell(new Phrase ("test",new Font(charbf, 12f)));
titleTable.addCell(cell);
cell = new Cell(new Phrase ("test2",new Font(charbf, 12f)));
titleTable.addCell(cell);
doc.add(titleTable);
}

}