Java GZIPOutputStream.flush方法代碼示例

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
@Override
protected void encode(ChannelHandlerContext ctx, MessageOrBuilder in, List<Object> out)
        throws Exception {
    Message msg = in instanceof Message ? (Message) in : ((Message.Builder) in).build();

    int typeId = register.getTypeId(msg.getClass());
    if (typeId == Integer.MIN_VALUE) {
        throw new IllegalArgumentException("Unrecognisable message type, maybe not registered! ");
    }
    byte[] messageData = msg.toByteArray();

    if (messageData.length <= 0) {
        out.add(ByteBufAllocator.DEFAULT.heapBuffer().writeInt(typeId)
                .writeInt(0));
        return;
    }

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    GZIPOutputStream def = new GZIPOutputStream(bos);
    def.write(messageData);
    def.flush();
    def.close();
    byte[] compressedData = bos.toByteArray();
    out.add(ByteBufAllocator.DEFAULT.heapBuffer().writeInt(typeId).writeInt(compressedData.length)
            .writeBytes(compressedData));
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
@Override
public byte[] compress( final byte[] data , final int start , final int length ) throws IOException{
  ByteArrayOutputStream bOut = new ByteArrayOutputStream();
  GZIPOutputStream out = new GZIPOutputStream( bOut );

  out.write( data , start , length );
  out.flush();
  out.finish();
  byte[] compressByte = bOut.toByteArray();
  byte[] retVal = new byte[ Integer.BYTES + compressByte.length ];
  ByteBuffer wrapBuffer = ByteBuffer.wrap( retVal );
  wrapBuffer.putInt( length );
  wrapBuffer.put( compressByte );

  bOut.close();
  out.close();

  return retVal;
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
private String i(String str) {
    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(str.getBytes());
    OutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    String str2 = null;
    try {
        GZIPOutputStream gZIPOutputStream = new GZIPOutputStream(byteArrayOutputStream);
        byte[] bArr = new byte[1024];
        while (true) {
            int read = byteArrayInputStream.read(bArr, 0, 1024);
            if (read == -1) {
                break;
            }
            gZIPOutputStream.write(bArr, 0, read);
        }
        gZIPOutputStream.flush();
        gZIPOutputStream.close();
        byte[] toByteArray = byteArrayOutputStream.toByteArray();
        byteArrayOutputStream.flush();
        byteArrayOutputStream.close();
        byteArrayInputStream.close();
        str2 = Base64.encodeToString(toByteArray, 2);
    } catch (Throwable e) {
        Ln.e(e);
    }
    return str2;
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
/**
 * 數據壓縮
 *
 * @param is
 * @param os
 * @throws Exception
 */
public static void compress(InputStream is, OutputStream os)
        throws Exception {

    GZIPOutputStream gos = new GZIPOutputStream(os);

    int count;
    byte data[] = new byte[BUFFER];
    while ((count = is.read(data, 0, BUFFER)) != -1) {
        gos.write(data, 0, count);
    }

    gos.finish();

    gos.flush();
    gos.close();
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
/**
 * Compress.
 *
 * @param str the str
 * @return the byte[]
 * @throws IOException Signals that an I/O exception has occurred.
 */
public static byte[] compress(final String str) throws IOException {
	if ((str == null) || (str.length() == 0)) {
		return null;
	}
	ByteArrayOutputStream obj = new ByteArrayOutputStream();
	GZIPOutputStream gzip = new GZIPOutputStream(obj);
	gzip.write(str.getBytes("UTF-8"));
	gzip.flush();
	gzip.close();
	return obj.toByteArray();
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
public static byte[] compress(byte[] data) throws IOException {
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    GZIPOutputStream gout = new GZIPOutputStream(bout);
    gout.write(data);
    gout.flush();
    gout.close();
    return bout.toByteArray();
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
/**
 * 數據壓縮
 * @param is
 * @param os
 * @throws Exception
 */
public static void compress(InputStream is, OutputStream os) throws Exception {
	GZIPOutputStream gos = new GZIPOutputStream(os);
	int count;
	byte data[] = new byte[BUFFER];
	while ((count = is.read(data, 0, BUFFER)) != -1) {
		gos.write(data, 0, count);
	}
	gos.finish();
	gos.flush();
	gos.close();
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
public static byte[] compress(byte[] data) throws IOException {
	ByteArrayOutputStream bout = new ByteArrayOutputStream();
	GZIPOutputStream gout = new GZIPOutputStream(bout);
	gout.write(data);
	gout.flush();
	gout.close();
	return bout.toByteArray();
}
 

import java.util.zip.GZIPOutputStream; //導入方法依賴的package包/類
@Override
public void run() {
    for (;;) {
        if (mic.available() >= SoundPacket.defaultDataLenght) { //we got enough data to send
            byte[] buff = new byte[SoundPacket.defaultDataLenght];
            while (mic.available() >= SoundPacket.defaultDataLenght) { //flush old data from mic to reduce lag, and read most recent data
                mic.read(buff, 0, buff.length); //read from microphone
            }
            try {
                //this part is used to decide whether to send or not the packet. if volume is too low, an empty packet will be sent and the remote client will play some comfort noise
                long tot = 0;
                for (int i = 0; i < buff.length; i++) {
                    buff[i] *= amplification;
                    tot += Math.abs(buff[i]);
                }
                tot *= 2.5;
                tot /= buff.length;
                //create and send packet
                Message m = null;
                if (tot == 0) {//send empty packet
                    m = new Message(-1, -1, new SoundPacket(null));
                } else { //send data
                    //compress the sound packet with GZIP
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    GZIPOutputStream go = new GZIPOutputStream(baos);
                    go.write(buff);
                    go.flush();
                    go.close();
                    baos.flush();
                    baos.close();
                    m = new Message(-1, -1, new SoundPacket(baos.toByteArray()));  //create message for server, will generate chId and timestamp from this computer's IP and this socket's port 
                }
                toServer.writeObject(m); //send message
            } catch (IOException ex) { //connection error
                stop();
            }
        } else {
            Utils.sleep(10); //sleep to avoid busy wait
        }
    }
}