Example usage for java.io FileInputStream read

Introduction

In this page you can find the example usage for java.io FileInputStream read.

Prototype

public int read(byte b[]) throws IOException

Source Link

Document

Reads up to b.length bytes of data from this input stream into an array of bytes.

Usage

From source file:ngse.org.Tools.java

public static void copyFile(String frm, String to) throws Exception {

    FileInputStream in = new FileInputStream(frm);
    FileOutputStream out = new FileOutputStream(to);
    byte[] buf = new byte[1024 * 8];
    while (true) {
        int len = in.read(buf);
        if (len <= 0) {
            break;
        }//  ww w.  j  ava  2s.  co  m
        out.write(buf, 0, len);
    }
    in.close();
    out.close();

}

From source file:dynamicrefactoring.util.io.FileManager.java

/**
 * Crea una copia de un fichero.//from   w ww.ja  v  a2  s.c  o m
 * 
 * @param in
 *            el fichero original.
 * @param out
 *            el fichero que se deber crear como copia.
 * 
 * @throws IOException
 *             si no se encuentra alguno de los dos ficheros.
 */
public static void copyFile(File in, File out) throws IOException {

    if (!out.exists()) {
        out.createNewFile();
    }

    FileInputStream input = new FileInputStream(in);
    FileOutputStream output = new FileOutputStream(out);

    try {
        byte[] buf = new byte[1024];
        int i = 0;
        while ((i = input.read(buf)) != -1)
            output.write(buf, 0, i);
    } finally {
        if (input != null)
            input.close();
        if (output != null)
            output.close();
    }
}

From source file:SmartEncodingInputStream.java

public static Charset guessEncoding(final File f, final int bufferLength)
        throws FileNotFoundException, IOException {
    final FileInputStream fis = new FileInputStream(f);
    final byte[] buffer = new byte[bufferLength];
    fis.read(buffer);
    fis.close();/*from  ww w.  ja  v  a  2  s  .c om*/
    final CharsetToolkit toolkit = new CharsetToolkit(buffer);
    toolkit.setDefaultCharset(getDefaultSystemCharset());
    return toolkit.guessEncoding();
}

From source file:SmartEncodingInputStream.java

public static Charset guessEncoding(final File f, final int bufferLength, final Charset defaultCharset)
        throws FileNotFoundException, IOException {
    final FileInputStream fis = new FileInputStream(f);
    final byte[] buffer = new byte[bufferLength];
    fis.read(buffer);
    fis.close();/*from w ww. ja  v a  2s  . c  o  m*/
    final CharsetToolkit toolkit = new CharsetToolkit(buffer);
    toolkit.setDefaultCharset(defaultCharset);
    return toolkit.guessEncoding();
}

From source file:org.fcrepo.test.api.TestHTTPStatusCodes.java

private static void copyFile(File sourceFile, File destFile) throws Exception {
    FileInputStream in = new FileInputStream(sourceFile);
    FileOutputStream out = new FileOutputStream(destFile);
    byte[] buf = new byte[4096];
    int len;/*from  ww  w.jav a2  s . co m*/
    try {
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
    } finally {
        in.close();
        out.close();
    }
}

From source file:de.brendamour.jpasskit.signing.PKSigningUtil.java

private static final void zip(final File directory, final File base, final ZipOutputStream zipOutputStream)
        throws IOException {
    File[] files = directory.listFiles();
    byte[] buffer = new byte[ZIP_BUFFER_SIZE];
    int read = 0;
    for (int i = 0, n = files.length; i < n; i++) {
        if (files[i].isDirectory()) {
            zip(files[i], base, zipOutputStream);
        } else {/*from   w w w.  j  ava 2  s . c  om*/
            FileInputStream fileInputStream = new FileInputStream(files[i]);
            ZipEntry entry = new ZipEntry(getRelativePathOfZipEntry(files[i], base));
            zipOutputStream.putNextEntry(entry);
            while (-1 != (read = fileInputStream.read(buffer))) {
                zipOutputStream.write(buffer, 0, read);
            }
            fileInputStream.close();
        }
    }
}

From source file:fr.moribus.imageonmap.migration.V3Migrator.java

/**
 * Calculates the checksum of a given file
 * @param file The file to calculate the checksum of
 * @param algorithmName The name of the algorithm to use
 * @return The resulting checksum in hexadecimal format
 * @throws IOException //w  ww  . j a va  2 s .co m
 */
static private String fileCheckSum(File file, String algorithmName) throws IOException {
    MessageDigest instance;
    try {
        instance = MessageDigest.getInstance(algorithmName);
    } catch (NoSuchAlgorithmException ex) {
        throw new IOException(
                "Could not check file integrity because of NoSuchAlgorithmException : " + ex.getMessage());
    }

    FileInputStream inputStream = new FileInputStream(file);

    byte[] data = new byte[1024];
    int read = 0;

    while ((read = inputStream.read(data)) != -1) {
        instance.update(data);
    }

    byte[] hashBytes = instance.digest();

    StringBuilder buffer = new StringBuilder();
    char hexChar;
    for (int i = 0; i < hashBytes.length; i++) {
        hexChar = Integer.toHexString((hashBytes[i] & 0xff) + 0x100).charAt(0);
        buffer.append(hexChar);
    }

    return buffer.toString();
}

From source file:net.semanticmetadata.lire.utils.FileUtils.java

public static void zipDirectory(File directory, File base, ZipOutputStream zos) throws IOException {
    File[] files = directory.listFiles();
    byte[] buffer = new byte[8192];
    int read = 0;
    for (int i = 0, n = files.length; i < n; i++) {
        if (files[i].isDirectory()) {
            zipDirectory(files[i], base, zos);
        } else {//from  w  ww . ja v  a 2s  .c  o  m
            FileInputStream in = new FileInputStream(files[i]);
            ZipEntry entry = new ZipEntry(files[i].getPath().substring(base.getPath().length() + 1));
            zos.putNextEntry(entry);
            while (-1 != (read = in.read(buffer))) {
                zos.write(buffer, 0, read);
            }
            in.close();
        }
    }
}

From source file:apim.restful.exportimport.utils.ArchiveGenerator.java

public static void addToZip(File directoryToZip, File file, ZipOutputStream zos)
        throws FileNotFoundException, IOException {

    FileInputStream fis = new FileInputStream(file);

    // we want the zipEntry's path to be a relative path that is relative
    // to the directory being zipped, so chop off the rest of the path
    String zipFilePath = file.getCanonicalPath().substring(directoryToZip.getCanonicalPath().length() + 1,
            file.getCanonicalPath().length());
    System.out.println("Writing '" + zipFilePath + "' to zip file");
    ZipEntry zipEntry = new ZipEntry(zipFilePath);
    zos.putNextEntry(zipEntry);// w  ww.j  a va 2s.  c  o  m

    byte[] bytes = new byte[1024];
    int length;
    while ((length = fis.read(bytes)) >= 0) {
        zos.write(bytes, 0, length);
    }

    zos.closeEntry();
    fis.close();
}

From source file:gov.nih.nci.caintegrator.common.Cai2Util.java

private static void addFile(File curFile, ZipOutputStream out, int index) throws IOException {
    byte[] tmpBuf = new byte[BUFFER_SIZE];
    FileInputStream in = new FileInputStream(curFile);
    String relativePathName = curFile.getPath().substring(index);
    out.putNextEntry(new ZipEntry(relativePathName));
    int len;//from  w ww . ja v  a  2s.  c  om
    while ((len = in.read(tmpBuf)) > 0) {
        out.write(tmpBuf, 0, len);
    }
    // Complete the entry
    out.closeEntry();
    in.close();
}