Consists of a three utilities that let you convert/strip/insert HTML
entities such as & and " from files converting them back and
forth to their equivalent single characters & and ".  It handles the HTML
4 entities such as ♥ as well as decimal { and hexadecimal
&x#123; entities.
You may us this package as standalone utilities, or use the classes in
your own programs to insert or strip entities from HTML.
You can use them like this:
REM to remove & entities and HTML tags from from two files and all files in somedir
REM converting entities back to characters
flatten.jar  afile.html another.html -s somedir
REM to convert & to & etc. entities in two files and all files in somedir
entify.jar afile.html another.html -s somedir
REM to convert entities in in two files and all files in somedir back to UFT-8 chars
REM leaving all HTML tags as is.
deentify.jar afile.html another.html -s somedir
They come complete with Java source and jar files.
The Apache people have some similar utilities at:
http://commons.apache.org/lang/api-2.4/org/apache/commons/lang/StringEscapeUtils.html