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

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Class java.util.zip.GZIPInputStream

java.lang.Object
   |
   +----java.io.InputStream
           |
           +----java.io.FilterInputStream
                   |
                   +----java.util.zip.InflaterInputStream
                           |
                           +----java.util.zip.GZIPInputStream

public class GZIPInputStream
extends InflaterInputStream

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

See Also:: InflaterInputStream

crc: CRC-32 for uncompressed data.
eos: Indicates end of input stream.
GZIP_MAGIC: GZIP header magic number.

GZIPInputStream(InputStream): Creates a new input stream with a default buffer size.
GZIPInputStream(InputStream, int): Creates a new input stream with the specified buffer size.

close(): Closes the input stream.
read(byte[], int, int): Reads uncompressed data into an array of bytes.

crc

 protected CRC32 crc

CRC-32 for uncompressed data.

eos

 protected boolean eos

Indicates end of input stream.

GZIP_MAGIC

 public static final int GZIP_MAGIC

GZIP header magic number.

GZIPInputStream

 public GZIPInputStream(InputStream in,
                        int size) throws IOException

Creates a new input stream with the specified buffer size.

Parameters:: in - the input stream; size - the input buffer size
Throws: IOException: if an I/O error has occurred

GZIPInputStream

 public GZIPInputStream(InputStream in) throws IOException

Creates a new input stream with a default buffer size.

Parameters:: in - the input stream
Throws: IOException: if an I/O error has occurred

read

 public int read(byte buf[],
                 int off,
                 int len) throws IOException

Reads uncompressed data into an array of bytes. Blocks until enough input is available for decompression.

Parameters:: buf - the buffer into which the data is read; off - the start offset of the data; len - the maximum number of bytes read
Returns:: the actual number of bytes read, or -1 if the end of the compressed input stream is reached
Throws: IOException: if an I/O error has occurred or the compressed input data is corrupt
Overrides:: read in class InflaterInputStream

close

 public void close() throws IOException

Closes the input stream.

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

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