Class java.util.zip.GZIPOutputStream - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.util.zip.GZIPOutputStream

java.lang.Object
   |
   +----java.io.OutputStream
           |
           +----java.io.FilterOutputStream
                   |
                   +----java.util.zip.DeflaterOutputStream
                           |
                           +----java.util.zip.GZIPOutputStream

public class GZIPOutputStream
extends DeflaterOutputStream

This class implements a stream filter for writing compressed data in the GZIP file format.

crc: CRC-32 of uncompressed data.

GZIPOutputStream(OutputStream): Creates a new output stream with a default buffer size.
GZIPOutputStream(OutputStream, int): Creates a new output stream with the specified buffer size.

close(): Writes remaining compressed data to the output stream and closes the underlying stream.
finish(): Finishes writing compressed data to the output stream without closing the underlying stream.
write(byte[], int, int): Writes array of bytes to the compressed output stream.

crc

 protected CRC32 crc

CRC-32 of uncompressed data.

GZIPOutputStream

 public GZIPOutputStream(OutputStream out,
                         int size) throws IOException

Creates a new output stream with the specified buffer size.

Parameters:: out - the output stream; size - the output buffer size
Throws: IOException: If an I/O error has occurred.

GZIPOutputStream

 public GZIPOutputStream(OutputStream out) throws IOException

Creates a new output stream with a default buffer size.

Parameters:: out - the output stream
Throws: IOException: If an I/O error has occurred.

write

 public synchronized void write(byte buf[],
                                int off,
                                int len) throws IOException

Writes array of bytes to the compressed output stream. This method will block until all the bytes are written.

Parameters:: buf - the data to be written; off - the start offset of the data; len - the length of the data
Throws: IOException: If an I/O error has occurred.
Overrides:: write in class DeflaterOutputStream

finish

 public void finish() throws IOException

Finishes writing compressed data to the output stream without closing the underlying stream. Use this method when applying multiple filters in succession to the same output stream.

Throws: IOException: if an I/O error has occurred
Overrides:: finish in class DeflaterOutputStream

close

 public void close() throws IOException

Writes remaining compressed data to the output stream and closes the underlying stream.

Throws: IOException: if an I/O error has occurred
Overrides:: close in class DeflaterOutputStream

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