Example usage for java.io ByteArrayOutputStream flush

Introduction

In this page you can find the example usage for java.io ByteArrayOutputStream flush.

Prototype

public void flush() throws IOException

Source Link

Document

Flushes this output stream and forces any buffered output bytes to be written out.

Usage

From source file:Main.java

public static byte[] getCompressedImage(byte[] rgb) {

    BufferedImage image;//from w w  w.  ja  v  a  2 s  . com
    int width;
    int height;

    try {
        image = ImageIO.read(new ByteArrayInputStream(rgb));
        width = image.getWidth();
        height = image.getHeight();

        for (int i = 0; i < height; i++) {

            for (int j = 0; j < width; j++) {

                Color c = new Color(image.getRGB(j, i));
                int red = (int) (c.getRed() * 0.299);
                int green = (int) (c.getGreen() * 0.587);
                int blue = (int) (c.getBlue() * 0.114);
                Color newColor = new Color(red + green + blue,

                        red + green + blue, red + green + blue);

                image.setRGB(j, i, newColor.getRGB());
            }
        }

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageIO.write(image, "jpg", baos);
        baos.flush();
        byte[] imageInByte = baos.toByteArray();
        baos.close();

        return imageInByte;

    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String imageDigest(BufferedImage img) {

    // write image to byte stream
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    try {/*from ww  w  . j av  a  2 s.  co  m*/
        ImageIO.write(img, "png", os);
        os.flush();
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
    byte[] data = os.toByteArray();

    // compute md5 hash
    byte[] hash = null;
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(data);
        hash = md.digest();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return null;
    }

    // convert to string
    String hexString = "";
    for (int i = 0; i < hash.length; i++) {
        hexString += Integer.toString((hash[i] & 0xff) + 0x100, 16).substring(1);
    }
    return hexString;
}

From source file:Main.java

public static byte[] compressBitmap(Bitmap bitmap) {
    ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
    if (bitmap.compress(Bitmap.CompressFormat.JPEG, 80, byteStream)) {
        try {// w  w w. ja v  a  2 s .  c o m
            byteStream.flush();
            byteStream.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    return byteStream.toByteArray();
}

From source file:Main.java

/**
 * Converts image to byte array.//from w ww  .  j  a v  a  2 s.  c o m
 * <br /><br />
 * <p/>
 * <b>ATTENTION</b>: image conversion is done by compression, witch is very long running operation.
 *
 * @param bmp     original bitmap
 * @param format  compress format
 * @param quality compress quality
 * @return compress image as byte array
 * @see android.graphics.Bitmap#compress(android.graphics.Bitmap.CompressFormat, int, java.io.OutputStream)
 */
public static byte[] bmpToByte(Bitmap bmp, Bitmap.CompressFormat format, int quality) {
    final ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bmp.compress(format, quality, stream);

    try {
        stream.flush();
        byte[] data = stream.toByteArray();
        stream.close();

        return data;
    } catch (IOException e) {
        return null;
    }
}

From source file:Main.java

public static byte[] getContent(Document doc) throws Exception {
    ByteArrayOutputStream writer = new ByteArrayOutputStream();
    transformer.transform(new DOMSource(doc), new StreamResult(new BufferedOutputStream(writer, 65536)));
    writer.flush();
    return writer.toByteArray();
}

From source file:Main.java

public static byte[] readInputStream(InputStream is) throws IOException {
    byte[] buffer = new byte[1024];
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    int len;//from   ww w. j  a  v a2s.c o m
    while ((len = is.read(buffer)) != -1) {
        baos.write(buffer, 0, len);
    }
    baos.flush();
    baos.close();
    is.close();
    return baos.toByteArray();
}

From source file:Main.java

public static byte[] readBytes(InputStream is) throws IOException {
    try {/*ww w. ja  v  a2s . c  o m*/
        BufferedInputStream bis = new BufferedInputStream(is);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        int ch;
        while ((ch = bis.read()) >= 0) {
            bos.write(ch);
        }
        bos.flush();
        return bos.toByteArray();
    } finally {
        is.close();
    }
}

From source file:Main.java

public static byte[] bitmap2Bytes(Bitmap bm) {
    if (bm == null || bm.isRecycled()) {
        return null;
    }/*from w ww.j  av  a  2 s  .  c  o  m*/
    byte[] bytes;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
    bytes = baos.toByteArray();
    try {
        baos.flush();
        baos.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return bytes;
}

From source file:Main.java

static byte[] compress(byte[] decompressed) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    GZIPOutputStream gzip = new GZIPOutputStream(bos);
    gzip.write(decompressed);/*from ww  w.j  a va  2 s  .  com*/
    gzip.flush();
    gzip.close();
    bos.flush();
    bos.close();
    return bos.toByteArray();
}

From source file:Main.java

public static byte[] bitmap2Bytes(Bitmap bitmap) {
    ByteArrayOutputStream baos;
    try {//from  ww  w .j  a va 2 s  . c o  m
        baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
        byte[] b = baos.toByteArray();
        baos.flush();
        baos.close();
        return b;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}