程序包 java.util.zip

类 DeflaterOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.util.zip.DeflaterOutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable

直接已知子类:

GZIPOutputStream, ZipOutputStream

public class DeflaterOutputStream
extends FilterOutputStream

This class implements an output stream filter for compressing data in the "deflate" compression format. It is also used as the basis for other types of compression filters, such as GZIPOutputStream.

另请参阅:

Deflater

字段概要

字段

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

从类继承的字段 java.io.FilterOutputStream

out

构造器概要

构造器

构造器	说明
DeflaterOutputStream(OutputStream out)	Creates a new output stream with a default compressor and buffer size.
DeflaterOutputStream(OutputStream out, boolean syncFlush)	Creates a new output stream with a default compressor, a default buffer size and the specified flush mode.
DeflaterOutputStream(OutputStream out, Deflater def)	Creates a new output stream with the specified compressor and a default buffer size.
DeflaterOutputStream(OutputStream out, Deflater def, boolean syncFlush)	Creates a new output stream with the specified compressor, flush mode and a default buffer size.
DeflaterOutputStream(OutputStream out, Deflater def, int size)	Creates a new output stream with the specified compressor and buffer size.
DeflaterOutputStream(OutputStream out, Deflater def, int size, boolean syncFlush)	Creates a new output stream with the specified compressor, buffer size and flush mode.

方法概要

限定符和类型	方法	说明
void	close()	Writes remaining compressed data to the output stream and closes the underlying stream.
protected void	deflate()	Writes next block of compressed data to the output stream.
void	finish()	Finishes writing compressed data to the output stream without closing the underlying stream.
void	flush()	Flushes the compressed output stream.
void	write(byte[] b, int off, int len)	Writes an array of bytes to the compressed output stream.
void	write(int b)	Writes a byte to the compressed output stream.

从类继承的方法 java.io.FilterOutputStream

write

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 byte[] buf

Output buffer for writing compressed data.

def

protected Deflater def

Compressor for this stream.

构造器详细资料

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out,
                            Deflater def,
                            int size,
                            boolean syncFlush)

Creates a new output stream with the specified compressor, buffer size and flush mode.

参数:

out - the output stream

def - the compressor ("deflater")

size - the output buffer size

syncFlush - if true the flush() method of this instance flushes the compressor with flush mode Deflater#SYNC_FLUSH before flushing the output stream, otherwise only flushes the output stream

抛出:

IllegalArgumentException - if size <= 0

从以下版本开始:

1.7

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out,
                            Deflater def,
                            int size)

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

The new output stream instance is created as if by invoking the 4-argument constructor DeflaterOutputStream(out, def, size, false).

参数:

out - the output stream

def - the compressor ("deflater")

size - the output buffer size

抛出:

IllegalArgumentException - if size <= 0

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out,
                            Deflater def,
                            boolean syncFlush)

Creates a new output stream with the specified compressor, flush mode and a default buffer size.

参数:

out - the output stream

def - the compressor ("deflater")

syncFlush - if true the flush() method of this instance flushes the compressor with flush mode Deflater#SYNC_FLUSH before flushing the output stream, otherwise only flushes the output stream

从以下版本开始:

1.7

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out,
                            Deflater def)

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

The new output stream instance is created as if by invoking the 3-argument constructor DeflaterOutputStream(out, def, false).

参数:

out - the output stream

def - the compressor ("deflater")

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out,
                            boolean syncFlush)

Creates a new output stream with a default compressor, a default buffer size and the specified flush mode.

参数:

out - the output stream

syncFlush - if true the flush() method of this instance flushes the compressor with flush mode Deflater#SYNC_FLUSH before flushing the output stream, otherwise only flushes the output stream

从以下版本开始:

1.7

DeflaterOutputStream

public DeflaterOutputStream(OutputStream out)

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

The new output stream instance is created as if by invoking the 2-argument constructor DeflaterOutputStream(out, false).

参数:

out - the output stream

方法详细资料

write

public void write(int b)
           throws IOException

Writes a byte to the compressed output stream. This method will block until the byte can be written.

覆盖:

write 在类中 FilterOutputStream

参数:

b - the byte to be written

抛出:

IOException - if an I/O error has occurred

write

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

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

覆盖:

write 在类中 FilterOutputStream

参数:

b - the data to be written

off - the start offset of the data

len - the length of the data

抛出:

IOException - if an I/O error has occurred

另请参阅:

FilterOutputStream.write(int)

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.

抛出:

IOException - if an I/O error has occurred

close

public void close()
           throws IOException

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

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

覆盖:

close 在类中 FilterOutputStream

抛出:

IOException - if an I/O error has occurred

另请参阅:

FilterOutputStream.flush(), FilterOutputStream.out

deflate

protected void deflate()
                throws IOException

Writes next block of compressed data to the output stream.

抛出:

IOException - if an I/O error has occurred

flush

public void flush()
           throws IOException

Flushes the compressed output stream. If syncFlush is true when this compressed output stream is constructed, this method first flushes the underlying compressor with the flush mode Deflater#SYNC_FLUSH to force all pending data to be flushed out to the output stream and then flushes the output stream. Otherwise this method only flushes the output stream without flushing the compressor.

指定者:

flush 在接口中 Flushable

覆盖:

flush 在类中 FilterOutputStream

抛出:

IOException - if an I/O error has occurred

从以下版本开始:

1.7

另请参阅:

FilterOutputStream.out