Compress an InputStream with gzip

Question

I would like to compress an input stream in java using Gzip compression.

Let\'s say we have an input stream (1GB of data..) not compressed. I want as a result a comp

Answer 1

There is no DeflatingGZIPInputStream in the JRE. To deflate with the "deflate" compression format, use java.util.zip.DeflaterInputStream and java.util.zip.DeflaterOutputStream:

public InputStream getCompressedStream(InputStream unCompressedStream) {
    return new DeflaterInputStream(unCompressedStream); 
}

You could derive a class from java.util.zip.DeflaterInputStream that deflates in GZIP format by looking at the the source of java.util.zip.GZIPOutputStream.