Using Watermarks with iText in Java

Watermarks are a great way to add a unique branding to your PDF documents. This tutorial will show you how to add watermarks to documents using the open source Java library iText.

Creating a Watermark

The first step is to create a watermark document. We will use a template that contains our logo and text. We need to modify the template to fit our needs such as setting the size, position, and rotation of the elements in the template.

Adding the Watermark To The Document

Once the template is ready, we can add it to our existing document. We will use the iText addWatermark() method for this. This method takes two parameters: a PdfReader object containing the existing document, and a PdfStamper object that contains the watermark.

Finishing Up

Finally, we need to save the modified document. We can do this by calling the close() method on the PdfStamper object. This will save any changes that have been made to the document.

Using watermarks with iText in Java is easy, and it is a powerful tool for adding unique branding to your documents. Whether you are creating a document from scratch or just adding a watermark to an existing document, iText makes it easy.