Example usage for java.nio.channels FileChannel close

List of usage examples for java.nio.channels FileChannel close

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Introduction

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

Prototype

public final void close() throws IOException

Source Link

Document

Closes this channel.

Usage

From source file:org.infai.amor.test.ModelUtil.java

public static void copyFile(final File in, final File out) throws IOException {
    final FileChannel inChannel = new FileInputStream(in).getChannel();
    final FileChannel outChannel = new FileOutputStream(out).getChannel();
    try {// ww  w  .  j  a  v a  2  s  .c om
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } catch (final IOException e) {
        throw e;
    } finally {
        if (inChannel != null) {
            inChannel.close();
        }
        if (outChannel != null) {
            outChannel.close();
        }
    }
}

From source file:edu.mit.csail.sdg.alloy4.Terminal.java

public static void copyFile(File sourceFile, File destFile) throws IOException {
    if (!sourceFile.exists()) {
        return;/*from   w  w  w  .  j  a va 2  s .  com*/
    }
    if (!destFile.exists()) {
        destFile.createNewFile();
    }

    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:yui.classes.utils.IOUtils.java

/**
 *
 * good for Large Files >2Mb/*w w w  .j  av a  2 s  . c  o  m*/
 * @param filename
 * @return
 */
private static byte[] largeFileReader(String filename) {
    byte[] bytes = null;
    FileChannel fc = null;
    try {
        fc = new FileInputStream(filename).getChannel();

        MappedByteBuffer byteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        int size = byteBuffer.capacity();
        if (size > 0) {
            // Retrieve all bytes in the buffer
            byteBuffer.clear();
            bytes = new byte[size];
            byteBuffer.get(bytes, 0, bytes.length);
        }
        fc.close();
    } catch (FileNotFoundException fnf) {
        System.err.println("" + fnf);
    } catch (IOException io) {
        System.err.println("" + io);
    } finally {
        if (fc != null) {
            try {
                fc.close();
            } catch (IOException ioe) {
                // ignore
            }
        }
    }
    return bytes;
}

From source file:com.aliyun.oss.integrationtests.TestUtils.java

public static String genRandomLengthFile() throws IOException {
    ensureDirExist(TestBase.UPLOAD_DIR);
    String filePath = TestBase.UPLOAD_DIR + System.currentTimeMillis();
    RandomAccessFile raf = new RandomAccessFile(filePath, "rw");
    FileChannel fc = raf.getChannel();

    long fileLength = rand.nextInt(MAX_RANDOM_LENGTH);
    MappedByteBuffer mbb = fc.map(MapMode.READ_WRITE, 0, fileLength);
    try {/*from   ww  w. j av a2s  .  c  om*/
        for (int i = 0; i < fileLength; i++) {
            mbb.put(pickupAlphabet());
        }
        return filePath;
    } finally {
        if (fc != null) {
            fc.close();
        }

        if (raf != null) {
            raf.close();
        }
    }
}

From source file:cn.com.sunjiesh.wechat.handler.WechatBaseHandler.java

/**
 * ?//from w  w w .  j a  v  a2s  . c  om
 *
 * @param httpResponse httpResponse
 * @param fileTpye fileTpye
 * @return File
 * @throws ServiceException ServiceException
 */
public static File getFileResponseFromHttpResponse(HttpResponse httpResponse, String fileTpye)
        throws ServiceException {
    File file = null;

    try {
        StatusLine httpStatusLine = httpResponse.getStatusLine();
        HttpEntity httpEntity = httpResponse.getEntity();
        int statusCode = httpStatusLine.getStatusCode();
        if (statusCode != HttpStatus.SC_OK) {
            LOGGER.error(DOWNLOAD_FILE_ERROR);
            throw new ServiceException(DOWNLOAD_FILE_ERROR);
        }

        String fileName = UUID.randomUUID().toString();
        fileName = fileName + "." + fileTpye;
        InputStream is = httpEntity.getContent();
        if (!StringUtils.isEmpty(fileName)) {
            //??
            file = new File("/var/tmp", fileName);
            if (file.exists()) {
                file.delete();
            }
            FileOutputStream fos = new FileOutputStream(file, false);
            FileChannel fileChannel = fos.getChannel();
            ByteBuffer byteBuffer = null;
            byte[] tempBytes = new byte[4096];
            while (is.read(tempBytes) > 0) {
                byteBuffer = ByteBuffer.wrap(tempBytes);
                fileChannel.write(byteBuffer);
            }
            if (fos != null) {
                fos.close();
            }
            fileChannel.close();
        }
    } catch (IllegalStateException e) {
        LOGGER.error(DOWNLOAD_FILE_ERROR, e);
        throw new ServiceException(DOWNLOAD_FILE_ERROR, e);
    } catch (FileNotFoundException e) {
        LOGGER.error(DOWNLOAD_FILE_ERROR, e);
        throw new ServiceException(DOWNLOAD_FILE_ERROR, e);
    } catch (IOException e) {
        LOGGER.error(DOWNLOAD_FILE_ERROR, e);
        throw new ServiceException(DOWNLOAD_FILE_ERROR, e);
    }

    return file;
}

From source file:net.filterlogic.util.imaging.ToTIFF.java

private static String bigEndian2LittleEndian(String fileName) throws FileNotFoundException, IOException {

    //import java.nio.ByteBuffer;
    //import java.nio.ByteOrder;
    //import java.nio.channels.FileChannel;
    //import java.io.FileOutputStream;

    byte[] imgData = loadFileToByteArray(fileName);
    String newFileName = fileName + ".be2le.tif";

    ByteBuffer buffer = ByteBuffer.allocate(imgData.length);
    buffer.order(ByteOrder.LITTLE_ENDIAN);
    buffer.put(imgData);//from  ww  w .j av a2  s .  c om
    FileChannel out = new FileOutputStream(newFileName).getChannel();
    out.write(buffer);
    out.close();

    return newFileName;
}

From source file:org.eclipse.thym.core.internal.util.FileUtils.java

private static void createFileFromZipFile(File file, ZipFile zipFile, ZipEntry zipEntry) throws IOException {
    if (!file.getParentFile().exists() && !file.getParentFile().mkdirs()) {
        throw new IOException("Can not create parent directory for " + file.toString());
    }/*from www.  j  a v  a 2s .c  o m*/
    file.createNewFile();
    FileOutputStream fout = null;
    FileChannel out = null;
    InputStream in = null;
    try {
        fout = new FileOutputStream(file);
        out = fout.getChannel();
        in = zipFile.getInputStream(zipEntry);
        out.transferFrom(Channels.newChannel(in), 0, Integer.MAX_VALUE);
    } finally {
        if (out != null)
            out.close();
        if (in != null)
            in.close();
        if (fout != null)
            fout.close();
    }
}

From source file:Main.java

/**
 * Effective way to copy files by file channel.
 * @return Return the number of copied files.
 *///from w  w w  .  j a  v a 2 s.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:ru.adios.budgeter.BundleProvider.java

private static void transferFile(String source, String destination, String errMsg) {
    final File sourceFile = new File(source);
    final File destFile = new File(destination);

    FileChannel fcSource = null;
    FileChannel fcDest = null;//from  www. jav  a 2  s .  co  m
    try {
        fcSource = new FileInputStream(sourceFile).getChannel();
        fcDest = new FileOutputStream(destFile).getChannel();
        fcDest.transferFrom(fcSource, 0, fcSource.size());
        fcSource.close();
        fcDest.close();
    } catch (IOException e) {
        logger.error(errMsg, e);
        throw new DataAccessResourceFailureException(errMsg, e);
    } finally {
        try {
            if (fcSource != null) {
                fcSource.close();
            }
            if (fcDest != null) {
                fcDest.close();
            }
        } catch (IOException ignore) {
            logger.warn("Exception while closing IO channels", ignore);
        }
    }
}

From source file:com.aurel.track.lucene.util.FileUtil.java

/**
 * Copies a source file to a destination file
 * @param source/*from   ww  w .j  a  va 2  s  .  c  o m*/
 * @param destination
 */
public static void copyFile(File source, File destination) {
    if (!source.exists()) {
        return;
    }

    if ((destination.getParentFile() != null) && (!destination.getParentFile().exists())) {

        destination.getParentFile().mkdirs();
    }

    FileChannel srcChannel = null;
    FileChannel dstChannel = null;

    try {
        srcChannel = new FileInputStream(source).getChannel();
        dstChannel = new FileOutputStream(destination).getChannel();

        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

        srcChannel.close();
        dstChannel.close();
    } catch (IOException ioe) {
        LOGGER.error(ExceptionUtils.getStackTrace(ioe));
    } finally {
        if (srcChannel != null)
            try {
                srcChannel.close();
            } catch (IOException ioe) {
            }
        ;
        if (dstChannel != null)
            try {
                dstChannel.close();
            } catch (IOException ioe) {
            }
        ;
    }
}