public class GZIPOutputStream extends DeflaterOutputStream
GZIPOutputStream class is used to write data to a stream in the
GZIP storage format.
Using GZIPOutputStream is a little easier than ZipOutputStream
because GZIP is only for compression, and is not a container for multiple files.
This code creates a GZIP stream, similar to the gzip(1) utility.
OutputStream os = ...
byte[] bytes = ...
GZIPOutputStream zos = new GZIPOutputStream(new BufferedOutputStream(os));
try {
zos.write(bytes);
} finally {
zos.close();
}
| Modifier and Type | Field and Description |
|---|---|
protected CRC32 |
crc
The checksum algorithm used when treating uncompressed data.
|
buf, defout| Constructor and Description |
|---|
GZIPOutputStream(OutputStream os)
Construct a new
GZIPOutputStream to write data in GZIP format to
the underlying stream. |
GZIPOutputStream(OutputStream os,
int size)
Construct a new
GZIPOutputStream to write data in GZIP format to
the underlying stream. |
| Modifier and Type | Method and Description |
|---|---|
void |
finish()
Indicates to the stream that all data has been written out, and any GZIP
terminal data can now be written.
|
void |
write(byte[] buffer,
int off,
int nbytes)
Write up to nbytes of data from the given buffer, starting at offset off,
to the underlying stream in GZIP format.
|
close, deflate, flush, writewriteprotected CRC32 crc
public GZIPOutputStream(OutputStream os) throws IOException
GZIPOutputStream to write data in GZIP format to
the underlying stream.os - the OutputStream to write data to.IOException - if an IOException occurs.public GZIPOutputStream(OutputStream os, int size) throws IOException
GZIPOutputStream to write data in GZIP format to
the underlying stream. Set the internal compression buffer to size
size.os - the OutputStream to write to.size - the internal buffer size.IOException - if an IOException occurs.public void finish()
throws IOException
finish in class DeflaterOutputStreamIOException - if an IOException occurs.public void write(byte[] buffer,
int off,
int nbytes)
throws IOException
write in class DeflaterOutputStreambuffer - the buffer to write.off - the index of the first byte in buffer to write.nbytes - the number of bytes in buffer to write.IOException - If an error occurs during writing.