解析HTML和CSS，并且能输出成image，PDF等格式.
Flying Saucer is an XML/CSS renderer, which means it takes XML files as input, applies formatting and styling using CSS, and generates a rendered representation of that XML as output. The output may go to the screen (in a GUI), to an image, or to a PDF file. Because we believe most people will be interested in re-using their knowledge of web layout, our main target for content is XHTML 1.0 (strict), an XML document format that standardizes HTML.
作者的一篇文章: http://today.java.net/pub/a/today/2007/06/26/generating-pdfs-with-flying- saucer-and-itext.html
