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:com.eucalyptus.auth.crypto.StringCryptoTest.java

private static byte[] readfile(String filename) throws Exception {
    FileInputStream fis = new FileInputStream(filename);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] block = new byte[512];
    int n;// ww  w  .  j a  va  2 s . c om
    while ((n = fis.read(block)) > 0) {
        baos.write(block, 0, n);
    }
    byte[] bytes = baos.toByteArray();
    baos.close();
    return bytes;
}

From source file:Main.java

private static byte[] getFileBytes(String filePath) {
    byte[] buffer = null;
    try {/*w w  w . j  a va  2  s  .c  o  m*/
        File file = new File(filePath);
        FileInputStream fis = new FileInputStream(file);
        ByteArrayOutputStream bos = new ByteArrayOutputStream(1024);
        byte[] b = new byte[1024];
        int n;
        while ((n = fis.read(b)) != -1) {
            bos.write(b, 0, n);
        }
        fis.close();
        bos.close();
        buffer = bos.toByteArray();
    } catch (FileNotFoundException e) {

    } catch (IOException e) {

    }
    return buffer;
}

From source file:Main.java

public static String compress(String filename) throws FileNotFoundException, IOException {
    byte[] buffer = new byte[4096];
    int bytesRead;
    String[] entries = { ".mp4" };
    String zipfile = filename.replace(".mp4", ".zip");
    if (!(new File(zipfile)).exists()) {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));
        out.setLevel(Deflater.BEST_COMPRESSION);
        out.setMethod(ZipOutputStream.DEFLATED);
        for (int i = 0; i < entries.length; i++) {
            File f = new File(filename.replace(".mp4", entries[i]));
            if (f.exists()) {
                FileInputStream in = new FileInputStream(f);
                ZipEntry entry = new ZipEntry(f.getName());
                out.putNextEntry(entry);
                while ((bytesRead = in.read(buffer)) != -1)
                    out.write(buffer, 0, bytesRead);
                in.close();/*  w w  w  . j a v a 2 s  .  co  m*/
            }
        }
        out.close();
    }
    return zipfile;
}

From source file:Compress.java

/** Zip the contents of the directory, and save it in the zipfile */
public static void zipDirectory(String dir, String zipfile) throws IOException, IllegalArgumentException {
    // Check that the directory is a directory, and get its contents
    File d = new File(dir);
    if (!d.isDirectory())
        throw new IllegalArgumentException("Not a directory:  " + dir);
    String[] entries = d.list();//from   w  w  w.j  a va  2  s  .c  o m
    byte[] buffer = new byte[4096]; // Create a buffer for copying
    int bytesRead;

    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));

    for (int i = 0; i < entries.length; i++) {
        File f = new File(d, entries[i]);
        if (f.isDirectory())
            continue;//Ignore directory
        FileInputStream in = new FileInputStream(f); // Stream to read file
        ZipEntry entry = new ZipEntry(f.getPath()); // Make a ZipEntry
        out.putNextEntry(entry); // Store entry
        while ((bytesRead = in.read(buffer)) != -1)
            out.write(buffer, 0, bytesRead);
        in.close();
    }
    out.close();
}

From source file:com.grapeshot.halfnes.FileUtils.java

public static int[] readfromfile(final String path) {
    File f = new File(path);
    byte[] bytes = new byte[(int) f.length()];
    FileInputStream fis;
    try {/*from  w  ww.ja v a2s  . c  o  m*/
        fis = new FileInputStream(f);
        fis.read(bytes);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        System.err.println("Failed to load file");
        e.printStackTrace();
    }
    int[] ints = new int[bytes.length];

    for (int i = 0; i < bytes.length; i++) {
        ints[i] = (short) (bytes[i] & 0xFF);
    }

    return ints;
}

From source file:Main.java

public static synchronized boolean downloadFileMD5Check(File f, String expectedMD5) {
    boolean flag = false;
    try {// www. j a  v  a 2  s  .  com
        MessageDigest md = MessageDigest.getInstance("MD5");
        FileInputStream fis = new FileInputStream(f);
        byte[] b = new byte[1024];
        int len = 0;
        while ((len = fis.read(b)) != -1) {
            md.update(b, 0, len);
        }

        if (md5(md).equals(expectedMD5)) {
            flag = true;
        }
        fis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return flag;
}

From source file:com.redsqirl.workflow.utils.FileStream.java

public static byte[] decryptFile(File in) throws Exception {
    //Decrypt the file data:
    byte[] encData;

    //Read in the file:
    FileInputStream inStream = new FileInputStream(in);
    encData = new byte[(int) in.length()];
    inStream.read(encData);
    inStream.close();//from  w w w . ja  va 2s . co  m

    byte[] decData = decrypt(encData);

    //Figure out how much padding to remove
    int padCount = (int) decData[decData.length - 1];

    //Naive check, will fail if plaintext file actually contained
    //this at the end
    //For robust check, check that padCount bytes at the end have same value
    if (padCount >= 1 && padCount <= 8) {
        decData = Arrays.copyOfRange(decData, 0, decData.length - padCount);
    }

    //Write the decrypted data to a new file:
    return decData;
}

From source file:it.geosolutions.imageio.plugins.nitronitf.NITFImageWriterSpi.java

public static boolean isNITF(File file) {
    FileInputStream fin = null;
    try {/* ww w  . j  a va2s  .c om*/
        fin = new FileInputStream(file);
        byte[] firstFour = new byte[4];
        fin.read(firstFour);
        return new String(firstFour).equals("NITF");
    } catch (IOException e) {
        return false;
    } finally {
        try {
            if (fin != null)
                fin.close();
        } catch (IOException e) {
            log.error(ExceptionUtils.getStackTrace(e));
        }
    }
}

From source file:FileUtil.java

public final static byte[] load(FileInputStream fin) {
    byte readBuf[] = new byte[512 * 1024];

    try {//from ww  w  . j  av  a  2s  . c om
        ByteArrayOutputStream bout = new ByteArrayOutputStream();

        int readCnt = fin.read(readBuf);
        while (0 < readCnt) {
            bout.write(readBuf, 0, readCnt);
            readCnt = fin.read(readBuf);
        }

        fin.close();

        return bout.toByteArray();
    } catch (Exception e) {

        return new byte[0];
    }
}

From source file:Main.java

public static byte[] getBytes(String filePath) {
    byte[] buffer = null;
    try {//from  w w  w  .j  a v a 2s .c  o m
        File file = new File(filePath);
        FileInputStream fis = new FileInputStream(file);
        ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
        byte[] b = new byte[1000];
        int n;
        while ((n = fis.read(b)) != -1) {
            bos.write(b, 0, n);
        }
        fis.close();
        bos.close();
        buffer = bos.toByteArray();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return buffer;
}