Question

We are running into problems caused by the bug described here: https://bugs.java.com/bugdatabase/view_bug?bug_id=6183404

I have already implemented a fix using a custom charset to fix the incorrect mappings.
However this still does not fix the problem for one Java application we are using, as that is hard-coded to use standard "GBK" charset.

Is there any way using java.nio.charset.spi.CharsetProvider to override existing, standard charsets?

Answer 1

Based on this code in Charset, it doesn’t look like you can override the standardProvider since it gets searched before any additional ones.

if ((cs = standardProvider.charsetForName(charsetName)) != null ||
    (cs = lookupExtendedCharset(charsetName))           != null ||
    (cs = lookupViaProviders(charsetName))              != null)

If the application stores the charset name in a field, you could do something nasty with reflection to change it before the application starts up.