程序包 java.util.zip

类 DeflaterInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.util.zip.DeflaterInputStream

所有已实现的接口:

Closeable, AutoCloseable

public class DeflaterInputStream
extends FilterInputStream

Implements an input stream filter for compressing data in the "deflate" compression format.

从以下版本开始:

1.6

另请参阅:

DeflaterOutputStream, InflaterOutputStream, InflaterInputStream

字段概要

字段

限定符和类型	字段	说明
protected byte[]	buf	Input buffer for reading compressed data.
protected Deflater	def	Compressor for this stream.

从类继承的字段 java.io.FilterInputStream

in

构造器概要

构造器

构造器	说明
DeflaterInputStream(InputStream in)	Creates a new input stream with a default compressor and buffer size.
DeflaterInputStream(InputStream in, Deflater defl)	Creates a new input stream with the specified compressor and a default buffer size.
DeflaterInputStream(InputStream in, Deflater defl, int bufLen)	Creates a new input stream with the specified compressor and buffer size.

方法概要

限定符和类型	方法	说明
int	available()	Returns 0 after EOF has been reached, otherwise always return 1.
void	close()	Closes this input stream and its underlying input stream, discarding any pending uncompressed data.
void	mark(int limit)	This operation is not supported.
boolean	markSupported()	Always returns false because this input stream does not support the mark() and reset() methods.
int	read()	Reads a single byte of compressed data from the input stream.
int	read(byte[] b, int off, int len)	Reads compressed data into a byte array.
void	reset()	This operation is not supported.
long	skip(long n)	Skips over and discards data from the input stream.

从类继承的方法 java.io.FilterInputStream

read

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

buf

protected final byte[] buf

Input buffer for reading compressed data.

def

protected final Deflater def

Compressor for this stream.

构造器详细资料

DeflaterInputStream

public DeflaterInputStream(InputStream in)

Creates a new input stream with a default compressor and buffer size.

参数:

in - input stream to read the uncompressed data to

抛出:

NullPointerException - if in is null

DeflaterInputStream

public DeflaterInputStream(InputStream in,
                           Deflater defl)

Creates a new input stream with the specified compressor and a default buffer size.

参数:

in - input stream to read the uncompressed data to

defl - compressor ("deflater") for this stream

抛出:

NullPointerException - if in or defl is null

DeflaterInputStream

public DeflaterInputStream(InputStream in,
                           Deflater defl,
                           int bufLen)

Creates a new input stream with the specified compressor and buffer size.

参数:

in - input stream to read the uncompressed data to

defl - compressor ("deflater") for this stream

bufLen - compression buffer size

抛出:

IllegalArgumentException - if bufLen <= 0

NullPointerException - if in or defl is null

方法详细资料

close

public void close()
           throws IOException

Closes this input stream and its underlying input stream, discarding any pending uncompressed data.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

覆盖:

close 在类中 FilterInputStream

抛出:

IOException - if an I/O error occurs

另请参阅:

FilterInputStream.in

read

public int read()
         throws IOException

Reads a single byte of compressed data from the input stream. This method will block until some input can be read and compressed.

覆盖:

read 在类中 FilterInputStream

返回:

a single byte of compressed data, or -1 if the end of the uncompressed input stream is reached

抛出:

IOException - if an I/O error occurs or if this stream is already closed

另请参阅:

FilterInputStream.in

read

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

Reads compressed data into a byte array. This method will block until some input can be read and compressed.

覆盖:

read 在类中 FilterInputStream

参数:

b - buffer into which the data is read

off - starting offset of the data within b

len - maximum number of compressed bytes to read into b

返回:

the actual number of bytes read, or -1 if the end of the uncompressed input stream is reached

抛出:

IndexOutOfBoundsException - if len > b.length - off

IOException - if an I/O error occurs or if this input stream is already closed

另请参阅:

FilterInputStream.in

skip

public long skip(long n)
          throws IOException

Skips over and discards data from the input stream. This method may block until the specified number of bytes are read and skipped. Note: While n is given as a long, the maximum number of bytes which can be skipped is Integer.MAX_VALUE.

覆盖:

skip 在类中 FilterInputStream

参数:

n - number of bytes to be skipped

返回:

the actual number of bytes skipped

抛出:

IOException - if an I/O error occurs or if this stream is already closed

available

public int available()
              throws IOException

Returns 0 after EOF has been reached, otherwise always return 1.

Programs should not count on this method to return the actual number of bytes that could be read without blocking

覆盖:

available 在类中 FilterInputStream

返回:

zero after the end of the underlying input stream has been reached, otherwise always returns 1

抛出:

IOException - if an I/O error occurs or if this stream is already closed

markSupported

public boolean markSupported()

Always returns false because this input stream does not support the mark() and reset() methods.

覆盖:

markSupported 在类中 FilterInputStream

返回:

false, always

另请参阅:

FilterInputStream.in, InputStream.mark(int), InputStream.reset()

mark

public void mark(int limit)

This operation is not supported.

覆盖:

mark 在类中 FilterInputStream

参数:

limit - maximum bytes that can be read before invalidating the position marker

另请参阅:

FilterInputStream.in, FilterInputStream.reset()

reset

public void reset()
           throws IOException

This operation is not supported.

覆盖:

reset 在类中 FilterInputStream

抛出:

IOException - always thrown

另请参阅:

FilterInputStream.in, FilterInputStream.mark(int)