Example usage for java.io DataOutputStream write

Introduction

In this page you can find the example usage for java.io DataOutputStream write.

Prototype

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

Source Link

Document

Writes len bytes from the specified byte array starting at offset off to the underlying output stream.

Usage

From source file:Main.java

public static void main(String[] args) throws IOException {

    byte[] buf = { 87, 64, 72, 31, 90 };
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    DataOutputStream dos = new DataOutputStream(baos);

    dos.write(buf, 2, 3);

    dos.flush();//  ww w . j  a  v  a  2  s  .  c  om

    for (byte b : baos.toByteArray()) {
        System.out.println(b);
    }
}

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From source file:Ch7_Images.java

public static void main(String[] args) {
    int numRows = 6, numCols = 11, pix = 20;
    PaletteData pd = new PaletteData(
            new RGB[] { new RGB(0x00, 0x00, 0x00), new RGB(0x80, 0x80, 0x80), new RGB(0xFF, 0xFF, 0xFF) });

    ImageData[] flagArray = new ImageData[3];
    for (int frame = 0; frame < flagArray.length; frame++) {
        flagArray[frame] = new ImageData(pix * numCols, pix * numRows, 4, pd);
        flagArray[frame].delayTime = 10;
        for (int x = 0; x < pix * numCols; x++) {
            for (int y = 0; y < pix * numRows; y++) {
                int value = (((x / pix) % 3) + (3 - ((y / pix) % 3)) + frame) % 3;
                flagArray[frame].setPixel(x, y, value);
            }/*from  www.  j a v a  2 s.c  o m*/
        }
    }

    ImageLoader gifloader = new ImageLoader();
    ByteArrayOutputStream flagByte[] = new ByteArrayOutputStream[3];
    byte[][] gifarray = new byte[3][];
    gifloader.data = flagArray;

    for (int i = 0; i < 3; i++) {
        flagByte[i] = new ByteArrayOutputStream();
        flagArray[0] = flagArray[i];
        gifloader.save(flagByte[i], SWT.IMAGE_GIF);
        gifarray[i] = flagByte[i].toByteArray();
    }

    byte[] gif = new byte[4628];
    System.arraycopy(gifarray[0], 0, gif, 0, 61);
    System.arraycopy(new byte[] { 33, (byte) 255, 11 }, 0, gif, 61, 3);
    System.arraycopy("NETSCAPE2.0".getBytes(), 0, gif, 64, 11);
    System.arraycopy(new byte[] { 3, 1, -24, 3, 0, 33, -7, 4, -24 }, 0, gif, 75, 9);
    System.arraycopy(gifarray[0], 65, gif, 84, 1512);

    for (int i = 1; i < 3; i++) {
        System.arraycopy(gifarray[i], 61, gif, 1516 * i + 80, 3);
        gif[1516 * i + 83] = (byte) -24;
        System.arraycopy(gifarray[i], 65, gif, 1516 * i + 84, 1512);
    }

    try {
        DataOutputStream in = new DataOutputStream(
                new BufferedOutputStream(new FileOutputStream(new File("FlagGIF.gif"))));
        in.write(gif, 0, gif.length);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

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From source file:Main.java

protected static void serialiseByteArray(DataOutputStream os, byte[] data, int start, int length,
        int max_length)

        throws IOException {
    serialiseLength(os, length, max_length);

    os.write(data, start, length);
}

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From source file:Main.java

public static String uploadFile(String filePath, String requestURL) {

    String result = "";
    File file = new File(filePath);

    try {/*  ww w. java 2  s  .com*/
        HttpURLConnection connection = initHttpURLConn(requestURL);

        if (filePath != null) {
            DataOutputStream dos = new DataOutputStream(connection.getOutputStream());
            StringBuffer sb = new StringBuffer();
            InputStream is = new FileInputStream(filePath);
            byte[] bytes = new byte[1024];
            int len = 0;
            while ((len = is.read(bytes)) != -1) {
                dos.write(bytes, 0, len);
            }
            dos.flush();
            is.close();
            int res = connection.getResponseCode();
            Log.e(TAG, "response code:" + res);
            if (res == 200) {
                Log.e(TAG, "request success");
                InputStream input = connection.getInputStream();
                StringBuffer sb1 = new StringBuffer();
                int ss;
                while ((ss = input.read()) != -1) {
                    sb1.append((char) ss);
                }

                result = sb1.toString();
                Log.d(TAG, "result: " + result);

                input.close();
            }
        }

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return result;

}

---

From source file:Main.java

public static void post(String actionUrl, String file) {
    try {//from w  w w .  jav  a  2s . c  om
        URL url = new URL(actionUrl);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false);
        con.setRequestMethod("POST");
        con.setRequestProperty("Charset", "UTF-8");
        con.setRequestProperty("Content-Type", "multipart/form-data;boundary=*****");
        DataOutputStream ds = new DataOutputStream(con.getOutputStream());
        FileInputStream fStream = new FileInputStream(file);
        int bufferSize = 1024; // 1MB
        byte[] buffer = new byte[bufferSize];
        int bufferLength = 0;
        int length;
        while ((length = fStream.read(buffer)) != -1) {
            bufferLength = bufferLength + 1;
            ds.write(buffer, 0, length);
        }
        fStream.close();
        ds.flush();
        InputStream is = con.getInputStream();
        int ch;
        StringBuilder b = new StringBuilder();
        while ((ch = is.read()) != -1) {
            b.append((char) ch);
        }
        new String(b.toString().getBytes("ISO-8859-1"), "utf-8");
        ds.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

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From source file:com.adaptris.security.StdOutput.java

private static void write(DataOutputStream out, byte[] bytes) throws IOException {
    if (bytes == null) {
        out.writeInt(0);/* w w  w .  ja  va  2s  .  co  m*/
    } else {
        out.writeInt(bytes.length);
        out.write(bytes, 0, bytes.length);
    }
}

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From source file:com.almarsoft.GroundhogReader.lib.FSUtils.java

public static long writeInputStreamAndGetSize(String directory, String filename, InputStream is)
        throws IOException {

    File outDir = new File(directory);
    if (!outDir.exists())
        outDir.mkdirs();/*from ww  w . j av  a 2s  .c  om*/

    File outFile = new File(directory, filename);

    DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(outFile)));

    byte buf[] = new byte[1024];
    int len;
    while ((len = is.read(buf)) > 0)
        dos.write(buf, 0, len);

    dos.close();

    return outFile.length();

}

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From source file:org.apache.hadoop.io.compress.TestCodec.java

private static void codecTest(Configuration conf, int seed, int count, String codecClass) throws IOException {

    // Create the codec
    CompressionCodec codec = null;//from  w ww.  ja va  2 s .  co  m
    try {
        codec = (CompressionCodec) ReflectionUtils.newInstance(conf.getClassByName(codecClass), conf);
    } catch (ClassNotFoundException cnfe) {
        throw new IOException("Illegal codec!");
    }
    LOG.info("Created a Codec object of type: " + codecClass);

    // Generate data
    DataOutputBuffer data = new DataOutputBuffer();
    RandomDatum.Generator generator = new RandomDatum.Generator(seed);
    for (int i = 0; i < count; ++i) {
        generator.next();
        RandomDatum key = generator.getKey();
        RandomDatum value = generator.getValue();

        key.write(data);
        value.write(data);
    }
    DataInputBuffer originalData = new DataInputBuffer();
    DataInputStream originalIn = new DataInputStream(new BufferedInputStream(originalData));
    originalData.reset(data.getData(), 0, data.getLength());

    LOG.info("Generated " + count + " records");

    // Compress data
    DataOutputBuffer compressedDataBuffer = new DataOutputBuffer();
    CompressionOutputStream deflateFilter = codec.createOutputStream(compressedDataBuffer);
    DataOutputStream deflateOut = new DataOutputStream(new BufferedOutputStream(deflateFilter));
    deflateOut.write(data.getData(), 0, data.getLength());
    deflateOut.flush();
    deflateFilter.finish();
    LOG.info("Finished compressing data");

    // De-compress data
    DataInputBuffer deCompressedDataBuffer = new DataInputBuffer();
    deCompressedDataBuffer.reset(compressedDataBuffer.getData(), 0, compressedDataBuffer.getLength());
    CompressionInputStream inflateFilter = codec.createInputStream(deCompressedDataBuffer);
    DataInputStream inflateIn = new DataInputStream(new BufferedInputStream(inflateFilter));

    // Check
    for (int i = 0; i < count; ++i) {
        RandomDatum k1 = new RandomDatum();
        RandomDatum v1 = new RandomDatum();
        k1.readFields(originalIn);
        v1.readFields(originalIn);

        RandomDatum k2 = new RandomDatum();
        RandomDatum v2 = new RandomDatum();
        k2.readFields(inflateIn);
        v2.readFields(inflateIn);
        assertTrue("original and compressed-then-decompressed-output not equal",
                k1.equals(k2) && v1.equals(v2));
    }
    LOG.info("SUCCESS! Completed checking " + count + " records");
}

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From source file:Main.java

/**
 * The URL looks like a request for a resource, such as a JavaScript or CSS file. Write
 * the given resource to the response output in binary format (needed for images).
 *//*ww w. j a v  a 2  s .c  o  m*/
public static void readWriteBinaryUtil(String sxURL, String resource, OutputStream outStream)
        throws IOException {

    DataOutputStream outData = null;
    DataInputStream inData = null;
    int byteCnt = 0;
    byte[] buffer = new byte[4096];

    // get full qualified path of class
    System.out.println("RW Base Directory - " + sxURL);

    // remove class and add resource relative path
    sxURL = getResourceURL(sxURL, resource);

    System.out.println("RW Loading - " + sxURL);
    try {
        outData = new DataOutputStream(outStream);
        inData = new DataInputStream(new URL(sxURL).openConnection().getInputStream());

        while ((byteCnt = inData.read(buffer)) != -1) {
            if (outData != null && byteCnt > 0) {
                outData.write(buffer, 0, byteCnt);
            }
        }
    } catch (IOException e) {
        throw e;
    } finally {
        try {
            if (inData != null) {
                inData.close();
            }
        } catch (IOException ioe) {
        }
    }
}

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From source file:Main.java

private static byte[] getBytesFromFile(File file) {
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream);
    try {/* w w  w  . ja v a2 s . c  om*/
        FileInputStream fileInputStream = null;
        try {
            fileInputStream = new FileInputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        int maxBufferSize = 1024 * 1024;
        int bufferSize = (int) Math.min(file.getTotalSpace(), maxBufferSize);
        byte[] buffer = new byte[bufferSize];

        // read file and write it into form...
        int bytesRead = 0;

        if (fileInputStream != null) {
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }

        while (bytesRead > 0) {
            dataOutputStream.write(buffer, 0, bufferSize);
            int bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return byteArrayOutputStream.toByteArray();
}

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