Java compact1, compact2, compact3 java.util.zip Class GZIPOutputStream（JDK8）

Field Detail

• crc

  protected CRC32 crc

  CRC-32 of uncompressed data.

Constructor Detail

• GZIPOutputStream

  public GZIPOutputStream(OutputStream out,
                          int size)
                   throws IOException

  Creates a new output stream with the specified buffer size.

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

  Parameters:

  out - the output stream

  size - the output buffer size

  Throws:

  IOException - If an I/O error has occurred.

  IllegalArgumentException - if size <= 0

• GZIPOutputStream

  public GZIPOutputStream(OutputStream out,
                          int size,
                          boolean syncFlush)
                   throws IOException

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

  Parameters:

  out - the output stream

  size - the output buffer size

  syncFlush - if true invocation of the inherited 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

  Throws:

  IOException - If an I/O error has occurred.

  IllegalArgumentException - if size <= 0

  Since:

  1.7

• GZIPOutputStream

  public GZIPOutputStream(OutputStream out)
                   throws IOException

  Creates a new output stream with a default buffer size.

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

  Parameters:

  out - the output stream

  Throws:

  IOException - If an I/O error has occurred.

• GZIPOutputStream

  public GZIPOutputStream(OutputStream out,
                          boolean syncFlush)
                   throws IOException

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

  Parameters:

  out - the output stream

  syncFlush - if true invocation of the inherited 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

  Throws:

  IOException - If an I/O error has occurred.

  Since:

  1.7

Method Detail

• write

  public 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.

  Overrides:

  write in class DeflaterOutputStream

  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.

  See Also:

  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.

  Overrides:

  finish in class DeflaterOutputStream

  Throws:

  IOException - if an I/O error has occurred