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:Main.java

/**
 * Copy file a to b and remove a. /*  ww  w  .  j av a 2 s  .c o m*/
 * @param source source file
 * @param destination destination file
 * @return true if success, false if fail.
 */
public static boolean move(File source, File destination) {
    try {
        FileInputStream in = new FileInputStream(source);
        FileOutputStream out = new FileOutputStream(destination);
        byte[] buffer = new byte[1024 * 1024];
        int size;
        while ((size = in.read(buffer)) >= 0) {
            out.write(buffer, 0, size);
        }
        in.close();
        out.flush();
        out.close();
        source.delete();
        return true;
    } catch (Exception exp) {
        exp.printStackTrace();
    }
    return false;
}

From source file:Main.java

static void addDir(File dirObj, ZipOutputStream out) throws IOException {
    File[] files = dirObj.listFiles();
    byte[] tmpBuf = new byte[1024];

    for (int i = 0; i < files.length; i++) {
        if (files[i].isDirectory()) {
            addDir(files[i], out);//w  w w. j a  v a  2s  .c o  m
            continue;
        }
        FileInputStream in = new FileInputStream(files[i].getAbsolutePath());
        System.out.println(" Adding: " + files[i].getAbsolutePath());
        out.putNextEntry(new ZipEntry(files[i].getAbsolutePath()));
        int len;
        while ((len = in.read(tmpBuf)) > 0) {
            out.write(tmpBuf, 0, len);
        }
        out.closeEntry();
        in.close();
    }
}

From source file:Main.java

/**
 * Copy file from oldPath to newPath//from w w w .  j  av  a2s .c om
 *
 * @param oldPath
 * @param newPath
 */
public static void copyFile(String oldPath, String newPath) {
    try {
        int byteread = 0;
        File oldfile = new File(oldPath);
        File newfile = new File(newPath);
        if (newfile.exists()) {
            newfile.delete();
        }
        newfile.createNewFile();
        if (oldfile.exists()) {
            FileInputStream inStream = new FileInputStream(oldPath);
            FileOutputStream outStream = new FileOutputStream(newPath);
            byte[] buffer = new byte[1024];
            while ((byteread = inStream.read(buffer)) > 0) {
                outStream.write(buffer, 0, byteread);
            }
            inStream.close();
            outStream.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static String[] GetSupportedFileSystems() {
    try {/*  w  ww . j ava  2  s  . c o m*/
        FileInputStream fProcFS = new FileInputStream(new File("/proc/filesystems"));
        ArrayList<String> filesystems = new ArrayList<String>();
        byte[] data1 = new byte[1024];
        int len = fProcFS.read(data1);
        fProcFS.close();
        String fs = new String(data1, 0, len);
        if (fs.contains("rfs"))
            filesystems.add("rfs");
        if (fs.contains("jfs"))
            filesystems.add("jfs");
        if (fs.contains("ext2"))
            filesystems.add("ext2");
        if (fs.contains("ext3"))
            filesystems.add("ext3");
        if (fs.contains("ext4"))
            filesystems.add("ext4");
        String[] List = (String[]) filesystems.toArray(new String[filesystems.size()]);
        return List;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:core.SHA256Hash.java

public static String CalculateCheckSumBase64(String FileName, String url) throws Exception {
    MessageDigest md = MessageDigest.getInstance(SHA256);
    FileInputStream fileHandle = new FileInputStream(FileName);

    byte[] dataBytes = new byte[1024];

    int nread = 0;
    while ((nread = fileHandle.read(dataBytes)) != -1) {
        md.update(dataBytes, 0, nread);/*from w w w.  ja  v a  2  s .  co m*/
    }
    ;
    byte[] mdbytes = md.digest();

    byte[] bytes = null;
    if (SHA256 == getHashAlgType(url)) {
        // Do base64 encoding
        bytes = Base64.encodeBase64URLSafe(mdbytes);
    } else {
        if (SHA256_16 == getHashAlgType(url))
            bytes = Base64.encodeBase64(new byte[] { mdbytes[0], mdbytes[1] }, false, true, 4);
    }

    // Store byte array as string and return it
    String value = new String(bytes);
    System.out.println("Base64 encoded " + getHashAlgType(url) + " hash: " + value);

    return value;
}

From source file:Main.java

public static String readFile(String path) {
    try {/*from  w  w w.j  a  va  2  s  .com*/
        FileInputStream in = new FileInputStream(path);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte buffer[] = new byte[1024];
        int count = 0;

        while ((count = in.read(buffer)) != -1) {
            if (out != null) {
                out.write(buffer, 0, count);
            }
        }

        return out.toString();

    } catch (FileNotFoundException e) {
        Log.e(TAG, "File not found: " + path, e);

    } catch (IOException e) {
        Log.e(TAG, "Error while reading file: " + path, e);
    }

    return null;
}

From source file:Main.java

private static final void zip(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()) {
            zip(files[i], base, zos);//  w  ww .  j  a va2s.co m
        } else {
            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:Main.java

public static String getFileMd5String(File file) {
    if (!file.isFile())
        throw new IllegalArgumentException("only file can calculate MD5 value!");

    MessageDigest digest;//  ww  w.  j av a2 s .c  om
    FileInputStream in = null;
    byte buffer[] = new byte[8192];
    int len;
    try {
        digest = MessageDigest.getInstance("MD5");
        in = new FileInputStream(file);
        while ((len = in.read(buffer)) != -1) {
            digest.update(buffer, 0, len);
        }
        BigInteger bigInt = new BigInteger(1, digest.digest());
        return bigInt.toString(16);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    } finally {
        try {
            if (in != null)
                in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

From source file:Main.java

public static void copyfile(String fromFilePath, String toFilePath, Boolean rewrite) {
    File fromFile = new File(fromFilePath);
    File toFile = new File(toFilePath);

    if (!fromFile.exists() || !fromFile.isFile() || !fromFile.canRead()) {
        return;//w  w  w .j  a v  a2  s . co  m
    }

    if (!toFile.getParentFile().exists()) {
        toFile.getParentFile().mkdirs();
    }

    if (toFile.exists() && rewrite) {
        toFile.delete();
    }

    try {
        FileInputStream fosfrom = new FileInputStream(fromFile);
        FileOutputStream fosto = new FileOutputStream(toFile);

        byte[] bt = new byte[1024];
        int c;
        while ((c = fosfrom.read(bt)) > 0) {
            fosto.write(bt, 0, c);
        }
        fosfrom.close();
        fosto.close();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:Main.java

public static void copyFile(File targetFile, File file) {
    if (targetFile.exists()) {
        return;//from  w w w. j  a va  2s.  c o m
    } else {
        createFile(targetFile, true);
    }
    try {
        FileInputStream is = new FileInputStream(file);
        FileOutputStream fos = new FileOutputStream(targetFile);
        byte[] buffer = new byte[1024 * 5];
        int len;
        while ((len = is.read(buffer)) != -1) {
            fos.write(buffer, 0, len);
        }
        is.close();
        fos.flush();
        fos.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}