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https://issues.apache.org/jira/browse/COMPRESS-380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839507#comment-15839507
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Dawid Weiss commented on COMPRESS-380:
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bq. A pure Java DEFLATE64 will certainly be slower than the JNI based DEFLATE
built into the JDK (which we re-use as well).
I don't think Java supports DEFLATE64 -- tried Java8 and Java9 and they don't
(Oracle and IBM). This tool does, supposedly (and is Apache licensed):
http://www.lingala.net/zip4j/
But I haven't tried it.
> Support for ENHANCED_DEFLATED (Deflate64) in ZIP files
> ------------------------------------------------------
>
> Key: COMPRESS-380
> URL: https://issues.apache.org/jira/browse/COMPRESS-380
> Project: Commons Compress
> Issue Type: New Feature
> Reporter: Dawid Weiss
>
> Some of the (large) ZIP files we try to process currently will throw this:
> {code}
> UnsupportedZipFeatureException: unsupported feature method
> 'ENHANCED_DEFLATED'
> {code}
> which is a bummer since JDK's implementation also doesn't support Deflate64.
> This seems to be PKWare's extensions, although code to decrypt it exists in
> zlib (and is appropriately licensed, I believe).
> https://github.com/madler/zlib/tree/master/contrib/infback9
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