Example usage for java.nio.channels FileChannel size

Introduction

In this page you can find the example usage for java.nio.channels FileChannel size.

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:MainClass.java

private static void createFile() throws Exception {
    long[] primes = new long[] { 1, 2, 3, 5, 7 };
    File aFile = new File("C:/primes.bin");
    FileOutputStream outputFile = new FileOutputStream(aFile);
    FileChannel file = outputFile.getChannel();
    final int BUFFERSIZE = 100;
    ByteBuffer buf = ByteBuffer.allocate(BUFFERSIZE);
    LongBuffer longBuf = buf.asLongBuffer();
    int primesWritten = 0;
    while (primesWritten < primes.length) {
        longBuf.put(primes, primesWritten, min(longBuf.capacity(), primes.length - primesWritten));
        buf.limit(8 * longBuf.position());

        file.write(buf);/*from  ww w .  j  a va2s. c om*/
        primesWritten += longBuf.position();
        longBuf.clear();
        buf.clear();
    }
    System.out.println("File written is " + file.size() + "bytes.");
    outputFile.close();
}

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From source file:Main.java

/**
 * Effective way to copy files by file channel.
 * @return Return the number of copied files.
 *///from   ww  w  .  ja v  a  2s.c o m
public static int fileChannelCopy(File[] sources, File[] targets) {
    int result = 0;
    if (sources == null || targets == null) {
        return result;
    }

    FileInputStream fis = null;
    FileOutputStream fos = null;
    FileChannel fc_in = null;
    FileChannel fc_out = null;
    try {
        for (int i = 0, len_s = sources.length, len_t = targets.length; i < len_s && i < len_t; ++i) {
            if (sources[i] == null || targets[i] == null) {
                continue;
            }

            fis = new FileInputStream(sources[i]);
            fos = new FileOutputStream(targets[i]);
            fc_in = fis.getChannel();
            fc_out = fos.getChannel();
            fc_in.transferTo(0, fc_in.size(), fc_out);

            ++result;
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (fc_out != null) {
            try {
                fc_out.close();
            } catch (IOException e) {
            }
        }
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException e) {
            }
        }
        if (fc_in != null) {
            try {
                fc_in.close();
            } catch (IOException e) {
            }
        }
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e) {
            }
        }
    }

    return result;
}

---

From source file:och.util.FileUtil.java

public static void copyFile(File sourceFile, File destFile) throws IOException {
    if (!destFile.exists()) {
        destFile.getParentFile().mkdirs();
        destFile.createNewFile();/*  ww  w  . j a  va 2  s. c o m*/
    }

    FileChannel source = null;
    FileChannel destination = null;
    try {
        source = new FileInputStream(sourceFile).getChannel();
        destination = new FileOutputStream(destFile).getChannel();
        destination.transferFrom(source, 0, source.size());
    } finally {
        if (source != null) {
            source.close();
        }
        if (destination != null) {
            destination.close();
        }
    }
}

---

From source file:de.ingrid.portal.portlets.admin.AdminPortalProfilePortlet.java

/**
 * Copy Files in file system./*  w  ww.  j  a  va2  s  . com*/
 * 
 * @param source
 * @param dest
 * @throws IOException
 */
private static void copy(File source, File dest) throws IOException {
    FileChannel in = null, out = null;
    try {
        in = new FileInputStream(source).getChannel();
        out = new FileOutputStream(dest).getChannel();

        in = new FileInputStream(source).getChannel();
        out = new FileOutputStream(dest).getChannel();
        out.transferFrom(in, 0, in.size());
    } catch (Exception e) {
        log.error("Error copy files ('" + source.getAbsolutePath() + "' -> '" + dest.getAbsolutePath() + "')",
                e);
    } finally {
        if (in != null)
            in.close();
        if (out != null)
            out.close();
    }
}

---

From source file:com.github.fritaly.dualcommander.Utils.java

private static void doCopyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
    if (destFile.exists() && destFile.isDirectory()) {
        throw new IOException("Destination '" + destFile + "' exists but is a directory");
    }//from  w  ww .j a  v  a2  s.c  om

    FileInputStream fis = null;
    FileOutputStream fos = null;
    FileChannel input = null;
    FileChannel output = null;
    try {
        fis = new FileInputStream(srcFile);
        fos = new FileOutputStream(destFile);
        input = fis.getChannel();
        output = fos.getChannel();
        long size = input.size();
        long pos = 0;
        long count = 0;
        while (pos < size) {
            count = size - pos > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : size - pos;
            pos += output.transferFrom(input, pos, count);
        }
    } finally {
        IOUtils.closeQuietly(output);
        IOUtils.closeQuietly(fos);
        IOUtils.closeQuietly(input);
        IOUtils.closeQuietly(fis);
    }

    if (srcFile.length() != destFile.length()) {
        throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
    }
    if (preserveFileDate) {
        destFile.setLastModified(srcFile.lastModified());
    }
}

---

From source file:dsd.controller.ParserControler.java

@SuppressWarnings("resource")
private static boolean TransferImageToSite(File inFile, File outFile) {
    if (!outFile.exists()) {
        try {//from w  w w . j  a  v  a2 s.c o m
            outFile.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

    FileChannel inChannel = null;
    FileChannel outChannel = null;
    try {
        inChannel = new FileInputStream(inFile).getChannel();
        outChannel = new FileOutputStream(outFile).getChannel();
        int maxCount = (64 * 1024 * 1024) - (32 * 1024);
        long size = inChannel.size();
        long position = 0;
        while (position < size) {
            position += inChannel.transferTo(position, maxCount, outChannel);
        }
        return true;
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (inChannel != null)
                inChannel.close();
            if (outChannel != null)
                outChannel.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
    return false;
}

---

From source file:com.weihuoya.bboo._G.java

public static boolean copyFile(File src, File dst) {
    FileInputStream instream = null;
    FileOutputStream outstream = null;
    FileChannel inchannel = null;
    FileChannel outchannel = null;

    try {//from  w  w  w  .ja  va 2s  .  c o m
        // channel
        instream = new FileInputStream(src);
        outstream = new FileOutputStream(dst);
        inchannel = instream.getChannel();
        outchannel = outstream.getChannel();
        // transfer
        inchannel.transferTo(0, inchannel.size(), outchannel);
        // close
        inchannel.close();
        outchannel.close();
        instream.close();
        outstream.close();
        //
        return true;
    } catch (IOException e) {
        _G.log(e.toString());
    }
    return false;
}

---

From source file:org.bibsonomy.lucene.util.generator.LuceneGenerateResourceIndex.java

/**
 * Fast & simple file copy./*from   www  .j a  v  a2s . co m*/
 * 
 * @param source 
 * @param dest 
 * @throws IOException 
 */
public static void copyFile(final File source, final File dest) throws IOException {
    FileChannel in = null, out = null;
    try {
        in = new FileInputStream(source).getChannel();
        out = new FileOutputStream(dest).getChannel();

        final long size = in.size();
        final MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);

        out.write(buf);

    } finally {
        if (in != null)
            in.close();
        if (out != null)
            out.close();
    }
}

---

From source file:org.jboss.as.forge.util.Files.java

/**
 * Copies the source file to the destination file.
 *
 * @param srcFile    the file to copy//ww w. ja v a2  s.com
 * @param targetFile the target file
 *
 * @return {@code true} if the file was successfully copied, {@code false} if the copy failed or was incomplete
 *
 * @throws IOException if an IO error occurs copying the file
 */
public static boolean copyFile(final File srcFile, final File targetFile) throws IOException {
    FileInputStream in = null;
    FileOutputStream out = null;
    FileChannel inChannel = null;
    FileChannel outChannel = null;
    try {
        in = new FileInputStream(srcFile);
        inChannel = in.getChannel();
        out = new FileOutputStream(targetFile);
        outChannel = out.getChannel();
        long bytesTransferred = 0;
        while (bytesTransferred < inChannel.size()) {
            bytesTransferred += inChannel.transferTo(0, inChannel.size(), outChannel);
        }
    } finally {
        Streams.safeClose(outChannel);
        Streams.safeClose(out);
        Streams.safeClose(inChannel);
        Streams.safeClose(in);
    }
    return srcFile.length() == targetFile.length();
}

---

From source file:org.sakaiproject.emailtemplateservice.service.impl.EmailTemplateServiceImpl.java

private static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {/*from w w w .  j a  va  2 s.c  om*/
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        /* Instead of using default, pass in a decoder. */
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

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