I was surprised to find that StringEscapeUtils
in the Apache Commons Lang
library doesn't let you specify whether it should double encode existing XML
entities or not. After all, even PHP
lets you do this. There is a very simple workaround for that however, so read on.
if you want to avoid double-encoding you simply pass false
to the htmlentities()
function like so:
This will output &
instead of &amp;
i.e. the string is not double encoded.
To achieve the same result with Java
and Apache Commons Lang StringEscapeUtils
all you have to do is:
That's simple after you see it! Just unescape
the string first, then escape
it. That will take care of any already encoded entities and will avoid double encoding.
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