Hi Howard
1. Yes you can. More info at
http://xml.apache.org/xalan-j/index.html 2. It's not necessary to create a file on the server, you can directly send the output of the transformation to the outputstream of a Socket for example. By doing so, no HTML file are generated on the server's filesystem and thus no manual cleaning is necessary.
Here is an exerpt of what you could do:
HIH
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Valentin Crettaz
Sun Certified Programmer for
Java 2 Platform