Convert Zip byte[] to Unzip byte[] using java code

Question

Could some one help me with the code snippet in converting zip byte[] to unzip byte[] in memory with out writing to a file intermediary

I looked in to this stack overflow "convert zip byte[] to unzip byte[]' but not able to get it using java code

Thanks Somu

try this: https://docs.oracle.com/javase/7/docs/technotes/guides/io/fsp/zipfilesystemprovider.html — Timothy Truckle, Jan 01 '18 at 00:30
Please see: [Why is “Can someone help me?” not an actual question?](http://meta.stackoverflow.com/q/284236) — EJoshuaS - Stand with Ukraine, Jan 01 '18 at 00:49

score 3 · Answer 1 · answered Jan 01 '18 at 00:40

3

Here are the tools you need for that:

ByteArrayInputStream - allows you to wrap an array of bytes as a stream.
ZipInputStream - reads the zipped stream of bytes and presents them as unzipped ones.
ByteArrayOutputStream - a stream that writes into internal byte buffer.
(If using Java 9) InputStream#transferTo - copy from input stream to output stream. (If not using Java 9) Copy it manually
ByteArrayOutputStream#toByteArray - extract buffer from the output stream.

Wire them all together and you are done.

answered Jan 01 '18 at 00:40

bezmax

Thank you bezmax, I tried but no luck – SomashekharRao Ramasingu Jan 02 '18 at 14:45
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(c) //here c containz zipped byte array ZipInputStream zipInputStreamn = new ZipInputStream(byteArrayInputStream) ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream() ByteStreams.copy(zipInputStreamn,byteArrayOutputStream) byte[] unZipFileByteArray = byteArrayOutputStream.toByteArray() println unZipFileByteArray.toString() //this is giving empty array – SomashekharRao Ramasingu Jan 02 '18 at 14:45

1 Answers1