Example usage for java.io File length

List of usage examples for java.io File length

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Introduction

In this page you can find the example usage for java.io File length.

Prototype

public long length()

Source Link

Document

Returns the length of the file denoted by this abstract pathname.

Usage

From source file:Main.java

public static String getFileMD5String(File file) throws IOException {
    FileInputStream in = new FileInputStream(file);
    FileChannel ch = in.getChannel();
    MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
    messagedigest.update(byteBuffer);/*from  w ww. ja v a  2s .  c  om*/
    return bufferToHex(messagedigest.digest());
}

From source file:FileTableHTML.java

public static String makeHTMLTable(String dirname) {
    // Look up the contents of the directory
    File dir = new File(dirname);
    String[] entries = dir.list();

    // Set up an output stream we can print the table to.
    // This is easier than concatenating strings all the time.
    StringWriter sout = new StringWriter();
    PrintWriter out = new PrintWriter(sout);

    // Print the directory name as the page title
    out.println("<H1>" + dirname + "</H1>");

    // Print an "up" link, unless we're already at the root
    String parent = dir.getParent();
    if ((parent != null) && (parent.length() > 0))
        out.println("<A HREF=\"" + parent + "\">Up to parent directory</A><P>");

    // Print out the table
    out.print("<TABLE BORDER=2 WIDTH=600><TR>");
    out.print("<TH>Name</TH><TH>Size</TH><TH>Modified</TH>");
    out.println("<TH>Readable?</TH><TH>Writable?</TH></TR>");
    for (int i = 0; i < entries.length; i++) {
        File f = new File(dir, entries[i]);
        out.println("<TR><TD>" + (f.isDirectory() ? "<a href=\"" + f + "\">" + entries[i] + "</a>" : entries[i])
                + "</TD><TD>" + f.length() + "</TD><TD>" + new Date(f.lastModified()) + "</TD><TD align=center>"
                + (f.canRead() ? "x" : " ") + "</TD><TD align=center>" + (f.canWrite() ? "x" : " ")
                + "</TD></TR>");
    }//from w w w. jav  a 2 s. c o m
    out.println("</TABLE>");
    out.close();

    // Get the string of HTML from the StringWriter and return it.
    return sout.toString();
}

From source file:documentToVector.spotlight.evaluation.external.AnnotationClient.java

protected static String readFileAsString(File file) throws IOException {
    byte[] buffer = new byte[(int) file.length()];
    BufferedInputStream f = new BufferedInputStream(new FileInputStream(file));
    f.read(buffer);/*from w  ww .  j a va2s .  co m*/
    f.close();
    return new String(buffer);
}

From source file:Main.java

public static Document addXMLItems(File xmlfile, String tag) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc;//  w w  w.  ja v  a 2 s.co  m
    if (xmlfile.length() == 0) {
        doc = builder.newDocument();
        Element rootElement = doc.createElement(tag + "s");
        doc.appendChild(rootElement);
    } else {
        doc = builder.parse(xmlfile);
    }
    return doc;
}

From source file:org.phpmaven.pear.impl.Helper.java

/**
 * Returns the binary file contents./* w w  w  .  ja  v  a 2  s  . co m*/
 * @param uri URI of the resource.
 * @return the files content.
 * @throws IOException thrown on errors.
 */
public static byte[] getBinaryFileContents(String uri) throws IOException {
    // is it inside the local filesystem?
    if (uri.startsWith("file://")) {
        final File channelFile = new File(uri.substring(7));

        final byte[] result = new byte[(int) channelFile.length()];
        final FileInputStream fis = new FileInputStream(channelFile);
        fis.read(result);
        return result;
    }

    // try http connection
    final HttpClient client = new DefaultHttpClient();
    final HttpGet httpget = new HttpGet(uri);
    final HttpResponse response = client.execute(httpget);
    if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
        throw new IOException("Invalid http status: " + response.getStatusLine().getStatusCode() + " / "
                + response.getStatusLine().getReasonPhrase());
    }
    final HttpEntity entity = response.getEntity();
    if (entity == null) {
        throw new IOException("Empty response.");
    }
    return EntityUtils.toByteArray(entity);
}

From source file:au.org.ala.layers.util.BatchProducer.java

private static int getFieldCount(String batchPath, String batchId) throws IOException {
    int count = 0;
    String dir = batchPath + File.separator + batchId + File.separator;
    if (new File(dir).exists()) {
        File f = new File(dir + "fids.txt");
        if (f.exists() && f.length() > 0) {
            count = FileUtils.readFileToString(new File(dir + "fids.txt")).split(",").length;
        }/*w  ww . ja v  a 2 s.co  m*/
    }
    return count;
}

From source file:mysynopsis.ImageProcess.java

public static String toImageString(String path) throws FileNotFoundException, IOException {

    String imageString = "";
    try {/*from  w w  w  .  ja v  a 2s.co  m*/
        File f = new File(path);
        try (FileInputStream fis = new FileInputStream(f)) {
            byte byteArray[] = new byte[(int) f.length()];
            fis.read(byteArray);
            imageString = Base64.encodeBase64String(byteArray);
            fis.close();
        }
    } catch (IOException iOException) {

        return "";
    }

    return imageString;
}

From source file:au.org.ala.layers.util.BatchProducer.java

private static int getPointCount(String batchPath, String batchId) throws IOException {
    int count = 0;
    String dir = batchPath + File.separator + batchId + File.separator;
    if (new File(dir).exists()) {
        File f = new File(dir + "points.txt");
        if (f.exists() && f.length() > 0) {
            count = (StringUtils.countOccurrencesOf(FileUtils.readFileToString(f), ",") + 1) / 2;
        }//from  w  w  w .  j av  a2 s  .  c  o m
    }
    return count;
}

From source file:at.tuwien.minimee.emulation.EmulationService.java

/**
 * utility method to read a bytestream from a file
 * @param file//from w  w  w.  j a va  2 s.c  o  m
 * @return
 * @throws IOException
 */
public static byte[] getBytesFromFile(File file) throws IOException {
    InputStream is = new FileInputStream(file);

    // Get the size of the file
    long length = file.length();

    if (length > Integer.MAX_VALUE) {
        // File is too large
    }

    // Create the byte array to hold the data
    byte[] bytes = new byte[(int) length];

    // Read in the bytes
    int offset = 0;
    int numRead = 0;
    while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
        offset += numRead;
    }

    // Ensure all the bytes have been read in
    if (offset < bytes.length) {
        throw new IOException("Could not completely read file " + file.getName());
    }

    // Close the input stream and return bytes
    is.close();
    return bytes;
}

From source file:com.bigdata.dastor.streaming.StreamOut.java

/**
 * Transfers a group of sstables from a single table to the target endpoint
 * and then marks them as ready for local deletion.
 *///from w w  w.  j  a  v  a  2 s .  c o m
public static void transferSSTables(InetAddress target, List<SSTableReader> sstables, String table)
        throws IOException {
    PendingFile[] pendingFiles = new PendingFile[SSTable.FILES_ON_DISK * sstables.size()];
    int i = 0;
    for (SSTableReader sstable : sstables) {
        for (String filename : sstable.getAllFilenames()) {
            File file = new File(filename);
            pendingFiles[i++] = new PendingFile(file.getAbsolutePath(), file.length(), table);
        }
    }
    logger.info("Stream context metadata "
            + StringUtils.join(pendingFiles, ", " + " " + sstables.size() + " sstables."));
    StreamOutManager.get(target).addFilesToStream(pendingFiles);
    StreamInitiateMessage biMessage = new StreamInitiateMessage(pendingFiles);
    Message message = StreamInitiateMessage.makeStreamInitiateMessage(biMessage);
    message.setHeader(StreamOut.TABLE_NAME, table.getBytes());
    logger.info("Sending a stream initiate message to " + target + " ...");
    MessagingService.instance.sendOneWay(message, target);

    if (pendingFiles.length > 0) {
        logger.info("Waiting for transfer to " + target + " to complete");
        StreamOutManager.get(target).waitForStreamCompletion();
        // todo: it would be good if there were a dafe way to remove the StreamManager for target.
        // (StreamManager will delete the streamed file on completion.)
        logger.info("Done with transfer to " + target);
    }
}