Is there any utility (or sample source code) that truncates HTML (for preview) in Java? I want to do the truncation on the server and not on the client.
I'm using HTMLUnit to parse HTML.
UPDATE:
I want to be able to preview the HTML, so the truncator would maintain the HTML structure while stripping out the elements after the desired output length.
I think you're going to need to write your own XML parser to accomplish this. Pull out the body node, add nodes until binary length < some fixed size, and then rebuild the document. If HTMLUnit doesn't create semantic XHTML, I'd recommend tagsoup.
If you need an XML parser/handler, I'd recommend XOM.
I can offer you a Python script I wrote to do this: http://www.ellipsix.net/ext-tmp/summarize.txt. Unfortunately I don't have a Java version, but feel free to translate it yourself and modify it to suit your needs if you want. It's not very complicated, just something I hacked together for my website, but I've been using it for a little more than a year and it generally seems to work pretty well.
If you want something robust, an XML (or SGML) parser is almost certainly a better idea than what I did.