jPDFProcess

jPDFProcess is a Java library to work with PDF documents that can be used to deliver customized PDF content to your users or to process and manipulate incoming PDF content. The library has a simple interface to work with PDF documents and is designed to be integrated easily and seamlessly into your PDF document workflow. jPDFProcess provides the functionality found in many of our other libraries, including printing, setting permissions and security, creating and assembling documents, digital signing, working with form fields, and extracting text.

Requirements:

Java 1.6 or higher

Limitations:

10 pages per documents / watermark