I\'m trying to generate a PDF document using FOP and Java.
I receive the XML as a string and not as a file.
How can I convert this XML string to an XML input str
You probably want to convert it to a Reader, not an InputStream. Use StringReader to do this. StreamSource has a constructor that takes a Reader, and you can pass that StreamSource to Transformer.transform().
I say you probably want a Reader rather than an InputStream because a String holds characters, not bytes, and an InputStream is a stream of bytes while a Reader is a stream of characters.