Example usage for java.io OutputStream write

Introduction

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

Prototype

public 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 this output stream.

Usage

From source file:com.zb.app.common.file.FileUtils.java

public static void unJar(File jarFile, File toDir) throws IOException {
    JarFile jar = new JarFile(jarFile);
    try {/*from w w w . j a  v a  2  s.  c om*/
        Enumeration<JarEntry> entries = jar.entries();
        while (entries.hasMoreElements()) {
            JarEntry entry = (JarEntry) entries.nextElement();
            if (!entry.isDirectory()) {
                InputStream in = jar.getInputStream(entry);
                try {
                    File file = new File(toDir, entry.getName());
                    if (!file.getParentFile().mkdirs()) {
                        if (!file.getParentFile().isDirectory()) {
                            throw new IOException("Mkdirs failed to create " + file.getParentFile().toString());
                        }
                    }
                    OutputStream out = new FileOutputStream(file);
                    try {
                        byte[] buffer = new byte[8192];
                        int i;
                        while ((i = in.read(buffer)) != -1) {
                            out.write(buffer, 0, i);
                        }
                    } finally {
                        out.close();
                    }
                } finally {
                    in.close();
                }
            }
        }
    } finally {
        jar.close();
    }
}

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From source file:hivemall.xgboost.NativeLibLoader.java

/**
 * Create a temp file that copies the resource from current JAR archive.
 *
 * @param libName Library name with a suffix
 * @param is Input stream to the native library
 * @return The created temp file//from   w  ww . j  av  a  2  s.co m
 * @throws IOException
 * @throws IllegalArgumentException
 */
static File createTempFileFromResource(String libName, InputStream is)
        throws IOException, IllegalArgumentException {
    // Create a temporary folder with a random number for the native lib
    final String uuid = UUID.randomUUID().toString();
    final File tempFolder = new File(System.getProperty("java.io.tmpdir"),
            String.format("%s-%s", getPrefix(libName), uuid));
    if (!tempFolder.exists()) {
        boolean created = tempFolder.mkdirs();
        if (!created) {
            throw new IOException("Failed to create a temporary folder for the native lib");
        }
    }

    // Prepare buffer for data copying
    final byte[] buffer = new byte[8192];
    int readBytes;

    // Open output stream and copy the native library into the temporary one
    File extractedLibFile = new File(tempFolder.getAbsolutePath(), libName);
    final OutputStream os = new FileOutputStream(extractedLibFile);
    try {
        while ((readBytes = is.read(buffer)) != -1) {
            os.write(buffer, 0, readBytes);
        }
    } finally {
        // If read/write fails, close streams safely before throwing an exception
        os.close();
        is.close();
    }
    return extractedLibFile;
}

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From source file:Main.java

public static void write(InputStream inputStream, OutputStream outputStream) throws IOException {
    int len;/*w ww . j  av  a2 s .c om*/
    byte[] buffer = new byte[4096];
    while ((len = inputStream.read(buffer)) != -1)
        outputStream.write(buffer, 0, len);
}

---

From source file:Main.java

public static void CopyStream(InputStream is, OutputStream os) {
    final int buffer_size = 1024;
    int total = 0;
    try {/*from  w  w w  .  ja v a2s.c o  m*/
        byte[] bytes = new byte[buffer_size];
        for (;;) {
            int count = is.read(bytes, 0, buffer_size);
            total += count;
            if (count == -1)
                break;
            os.write(bytes, 0, count);
        }
    } catch (Exception ex) {
    }
}

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From source file:org.eclipse.wst.json.core.internal.download.HttpClientProvider.java

private static void copy(InputStream in, OutputStream out) throws IOException {
    byte[] buffer = new byte[8192];
    int n = 0;/*  w  ww. j  a  va 2  s.  c  om*/
    while ((n = in.read(buffer)) != -1) {
        out.write(buffer, 0, n);
    }
}

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From source file:gobblin.util.io.StreamUtils.java

/**
 * Reads the full contents of a ByteBuffer and writes them to an OutputStream. The ByteBuffer is
 * consumed by this operation; eg in.remaining() will be 0 after it completes successfully.
 * @param in  ByteBuffer to write into the OutputStream
 * @param out Destination stream/*  w  w  w  .ja  v a 2s  .co m*/
 * @throws IOException If there is an error writing into the OutputStream
 */
public static void byteBufferToOutputStream(ByteBuffer in, OutputStream out) throws IOException {
    final int BUF_SIZE = 8192;

    if (in.hasArray()) {
        out.write(in.array(), in.arrayOffset() + in.position(), in.remaining());
    } else {
        final byte[] b = new byte[Math.min(in.remaining(), BUF_SIZE)];
        while (in.remaining() > 0) {
            int bytesToRead = Math.min(in.remaining(), BUF_SIZE);
            in.get(b, 0, bytesToRead);

            out.write(b, 0, bytesToRead);
        }
    }
}

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From source file:ml.dmlc.xgboost4j.java.NativeLibLoader.java

/**
 * Create a temp file that copies the resource from current JAR archive
 * <p/>//www . ja va 2 s.c  o  m
 * The file from JAR is copied into system temp file.
 * The temporary file is deleted after exiting.
 * Method uses String as filename because the pathname is "abstract", not system-dependent.
 * <p/>
 * The restrictions of {@link File#createTempFile(java.lang.String, java.lang.String)} apply to
 * {@code path}.
 * @param path Path to the resources in the jar
 * @return The created temp file.
 * @throws IOException
 * @throws IllegalArgumentException
 */
static String createTempFileFromResource(String path) throws IOException, IllegalArgumentException {
    // Obtain filename from path
    if (!path.startsWith("/")) {
        throw new IllegalArgumentException("The path has to be absolute (start with '/').");
    }

    String[] parts = path.split("/");
    String filename = (parts.length > 1) ? parts[parts.length - 1] : null;

    // Split filename to prexif and suffix (extension)
    String prefix = "";
    String suffix = null;
    if (filename != null) {
        parts = filename.split("\\.", 2);
        prefix = parts[0];
        suffix = (parts.length > 1) ? "." + parts[parts.length - 1] : null; // Thanks, davs! :-)
    }

    // Check if the filename is okay
    if (filename == null || prefix.length() < 3) {
        throw new IllegalArgumentException("The filename has to be at least 3 characters long.");
    }
    // Prepare temporary file
    File temp = File.createTempFile(prefix, suffix);
    temp.deleteOnExit();

    if (!temp.exists()) {
        throw new FileNotFoundException("File " + temp.getAbsolutePath() + " does not exist.");
    }

    // Prepare buffer for data copying
    byte[] buffer = new byte[1024];
    int readBytes;

    // Open and check input stream
    InputStream is = NativeLibLoader.class.getResourceAsStream(path);
    if (is == null) {
        throw new FileNotFoundException("File " + path + " was not found inside JAR.");
    }

    // Open output stream and copy data between source file in JAR and the temporary file
    OutputStream os = new FileOutputStream(temp);
    try {
        while ((readBytes = is.read(buffer)) != -1) {
            os.write(buffer, 0, readBytes);
        }
    } finally {
        // If read/write fails, close streams safely before throwing an exception
        os.close();
        is.close();
    }
    return temp.getAbsolutePath();
}

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From source file:com.example.facebookfriendviewer.utils.Utils.java

public static void copyStream(InputStream is, OutputStream os) {
    try {/*  w w  w.j a  v  a  2s .co  m*/
        byte[] bytes = new byte[BUFFER_SIZE];
        for (;;) {
            int count = is.read(bytes, 0, BUFFER_SIZE);
            if (count == -1)
                break;
            os.write(bytes, 0, count);
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

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From source file:br.org.ipti.guigoh.util.DownloadService.java

public static synchronized void downloadFile(File file, String mimeType) {
    FacesContext facesContext = FacesContext.getCurrentInstance();
    ExternalContext context = facesContext.getExternalContext();
    HttpServletResponse response = (HttpServletResponse) context.getResponse();
    response.setHeader("Content-Disposition", "attachment;filename=\"" + file.getName() + "\"");
    response.setContentLength((int) file.length());
    response.setContentType(mimeType);// w  w  w .j  a v a 2 s .  c  om
    try {
        OutputStream out;
        try (FileInputStream in = new FileInputStream(file)) {
            out = response.getOutputStream();
            byte[] buf = new byte[(int) file.length()];
            int count;
            while ((count = in.read(buf)) >= 0) {
                out.write(buf, 0, count);
            }
        }
        out.flush();
        out.close();
        facesContext.responseComplete();
    } catch (IOException ex) {
        System.out.println("Error in downloadFile: " + ex.getMessage());
    }
}

---

From source file:Main.java

public static void writeInputStreamToOutputStream(InputStream in, OutputStream out, long maxLength)
        throws IOException {
    byte[] buf = new byte[4096];
    int bytesRead;

    while ((bytesRead = in.read(buf)) != -1) {
        maxLength -= bytesRead;//from   ww w .  j ava2s  . c om
        if (maxLength <= 0) {
            throw new IOException("Stream exceeded max size");
        }
        out.write(buf, 0, bytesRead);
    }
}

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