Op 9/04/2012 5:14, 眼镜兄 schreef:
> I want to add some words as a watermark to a PDF file. The watermark 
> should list vertically and the words of the watermark should rotate 90 
> degrees.
> Can you give me an example?

Can you read the documentation? See http://itextpdf.com/book/
ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, new 
Phrase("rotated 90 degrees"), x, y, 90);

canvas is an instance of PdfContentByte (for instance obtained from a 
PdfStamper using getOverContent()).
x and y are coordinates.

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