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

public static void copyFolder(String oldPath, String newPath) {

    try {/*w  w  w. j a va 2 s.  co  m*/
        (new File(newPath)).mkdirs();
        File a = new File(oldPath);
        String[] file = a.list();
        File temp = null;
        for (int i = 0; i < file.length; i++) {
            if (oldPath.endsWith(File.separator)) {
                temp = new File(oldPath + file[i]);
            } else {
                temp = new File(oldPath + File.separator + file[i]);
            }

            if (temp.isFile()) {
                FileInputStream input = new FileInputStream(temp);
                FileOutputStream output = new FileOutputStream(newPath + "/" + (temp.getName()).toString());
                byte[] b = new byte[1024 * 5];
                int len;
                while ((len = input.read(b)) != -1) {
                    output.write(b, 0, len);
                }
                output.flush();
                output.close();
                input.close();
            }
            if (temp.isDirectory()) {
                copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
            }
        }
    } catch (Exception e) {
        Log.e(TAG, "copyFolder() copy dir error", e);
    }

}

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From source file:com.bmw.spdxeditor.editors.spdx.SPDXEditorUtility.java

/**
 * Calculate the SHA1 value for the file given in path
 * @param path/*w  w w  . j a  va  2s.  co m*/
 * @return
 * @throws Exception
 */
public static String calculateSHA1(File path) throws Exception {
    MessageDigest md = MessageDigest.getInstance("SHA1");
    FileInputStream fis = new FileInputStream(path);
    byte[] dataBytes = new byte[1024];

    int nread = 0;

    while ((nread = fis.read(dataBytes)) != -1) {
        md.update(dataBytes, 0, nread);
    }
    ;

    byte[] mdbytes = md.digest();

    //convert the byte to hex format
    StringBuffer sb = new StringBuffer("");
    for (int i = 0; i < mdbytes.length; i++) {
        sb.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));
    }

    return sb.toString();
}

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From source file:Main.java

public static void modifyByte(Activity activity, File srcFile, String destFile, byte[] byteNums,
        byte[] byteContents) {
    //        throw new UnsupportedOperationException("Not yet implemented");
    //        UIUtils.log("Modifying byte: " + byteNum + " in sdcard file: " + srcFile);
    try {//from  w w  w  .j a  v a  2s  .  co m
        FileInputStream is = new FileInputStream(srcFile); // open the input stream for reading
        OutputStream os = new FileOutputStream(destFile);
        byte[] buf = new byte[8092];
        int n;
        int totalBytes = 0;
        while ((n = is.read(buf)) > 0) {
            totalBytes += n;
            //                UIUtils.log("Total Bytes read: " + totalBytes);
            for (int i = 0; i < byteNums.length; i++) {
                if (byteNums[i] <= totalBytes) {
                    //                    UIUtils.log("Replacing byte: " + (totalBytes - n + byteNum ) + " contents with: " + byteContents);
                    buf[totalBytes - n + byteNums[i]] = byteContents[i];
                }
            }
            os.write(buf, 0, n);
        }
        //            UIUtils.log(ByteUtils.ByteArrayToString(buf));
        os.close();
        is.close();
    } catch (Exception ex) {
        Log.e("Installer", "failed to modify file: " + ex);
    }
}

---

From source file:com.zving.platform.SysInfo.java

public static void downloadDB(HttpServletRequest request, HttpServletResponse response) {
    try {//from   w  w w  . j a  va  2 s  .  co  m
        request.setCharacterEncoding(Constant.GlobalCharset);
        response.reset();
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition",
                "attachment; filename=DB_" + DateUtil.getCurrentDate("yyyyMMddHHmmss") + ".dat");
        OutputStream os = response.getOutputStream();

        String path = Config.getContextRealPath() + "WEB-INF/data/backup/DB_"
                + DateUtil.getCurrentDate("yyyyMMddHHmmss") + ".dat";
        new DBExport().exportDB(path);

        byte[] buffer = new byte[1024];
        int read = -1;
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(path);
            while ((read = fis.read(buffer)) != -1)
                if (read > 0) {
                    byte[] chunk = (byte[]) null;
                    if (read == 1024) {
                        chunk = buffer;
                    } else {
                        chunk = new byte[read];
                        System.arraycopy(buffer, 0, chunk, 0, read);
                    }
                    os.write(chunk);
                    os.flush();
                }
        } finally {
            if (fis != null) {
                fis.close();
            }
        }
        os.flush();
        os.close();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:com.glaf.core.security.DigestUtil.java

public static void digestFile(String filename, String algorithm) {
    byte[] b = new byte[65536];
    int read = 0;
    FileInputStream fis = null;
    FileOutputStream fos = null;// w w w.ja va 2 s  .  c  o m
    OutputStream encodedStream = null;
    try {
        MessageDigest md = MessageDigest.getInstance(algorithm);
        fis = new FileInputStream(filename);
        while (fis.available() > 0) {
            read = fis.read(b);
            md.update(b, 0, read);
        }
        byte[] digest = md.digest();
        StringBuffer fileNameBuffer = new StringBuffer(256).append(filename).append('.').append(algorithm);
        fos = new FileOutputStream(fileNameBuffer.toString());
        encodedStream = MimeUtility.encode(fos, "base64");
        encodedStream.write(digest);
        fos.flush();
    } catch (Exception ex) {
        throw new RuntimeException("Error computing Digest: " + ex);
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
        IOUtils.closeQuietly(encodedStream);
    }
}

---

From source file:MainWindowLogic.java

static void isTextFile(File fil_hnd) throws IncorrectFileTypeException, FileNotFoundException, IOException {
    FileInputStream in = new FileInputStream(fil_hnd);
    int size = in.available();
    if (size > 1000)
        size = 1000;//ww w  .  j  a v a2s  .  c  o m
    byte[] data = new byte[size];
    in.read(data);
    in.close();
    String s = new String(data, "ISO-8859-1");
    String s2 = s.replaceAll("[a-zA-Z0-9\\.\\*!\"\\$\\%&/()=\\?@~'#:,;\\"
            + "+><\\|\\[\\]\\{\\}\\^\\\\ \\n\\r\\t_\\-`"
            + "??]", "");
    // will delete all text signs

    double d = (double) (s.length() - s2.length()) / (double) (s.length());
    // percentage of text signs in the text
    if (!(d > 0.950))
        throw new IncorrectFileTypeException();

}

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From source file:controllers.user.UserAvatarApp.java

@Deprecated
public static Result render(File file) {
    try {//  w  ww .j  a v  a2  s .  c  om
        FileInputStream in = new FileInputStream(file);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] b = new byte[2048];
        int len = -1;
        while ((len = in.read(b)) != -1) {
            out.write(b, 0, len);
        }
        in.close();
        return ok(out.toByteArray());
    } catch (Exception e) {
        Logger.error("render user avatar error ", e);
    }
    return ok();
}

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From source file:controlador.Red.java

/**
 * Envio de un fichero desde el Cliente Local al Server FTP.
 * @param rutaLocal Ruta del Cliente donde se buscara el fichero.
 * @param name Nombre con el cual se buscara y creara el fichero.
 * @return Estado de la operacion.//w w w  .  ja v a2s  .c  om
 */
public static boolean sendFile(String rutaLocal, String name) {
    try {
        url = new URL(conexion + name);
        URLConnection urlConn = url.openConnection();
        OutputStream os = urlConn.getOutputStream();
        FileInputStream fis = new FileInputStream(new File(rutaLocal + name));
        byte[] buffer = new byte[BUFFER_LENGTH];

        int count;
        while ((count = fis.read(buffer)) > 0) {
            os.write(buffer, 0, count);
        }
        os.flush();
        os.close();
        fis.close();

        return true;
    } catch (IOException ex) {
        ex.printStackTrace();
        System.out.println("Problema al enviar un fichero al server: " + ex.getLocalizedMessage());
    }

    return false;
}

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From source file:Main.java

public static boolean copyFile(File from, File to, byte[] buf) {
    if (buf == null)
        buf = new byte[BUFFER_SIZE];

    ///*ww w  . j  a  va  2s. co m*/
    // System.out.println("Copy file ("+from+","+to+")");
    FileInputStream from_s = null;
    FileOutputStream to_s = null;

    try {
        from_s = new FileInputStream(from);
        to_s = new FileOutputStream(to);

        for (int bytesRead = from_s.read(buf); bytesRead != -1; bytesRead = from_s.read(buf))
            to_s.write(buf, 0, bytesRead);

        from_s.close();
        from_s = null;

        to_s.getFD().sync(); // RESOLVE: sync or no sync?
        to_s.close();
        to_s = null;
    } catch (IOException ioe) {
        return false;
    } finally {
        if (from_s != null) {
            try {
                from_s.close();
            } catch (IOException ioe) {
            }
        }
        if (to_s != null) {
            try {
                to_s.close();
            } catch (IOException ioe) {
            }
        }
    }

    return true;
}

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From source file:Main.java

public static byte[] readFile(File file) throws IOException {
    if (!file.exists()) {
        throw new IOException("not crete file=" + file.getAbsolutePath());
    }//from w  ww . j  av  a2  s  . c om
    FileInputStream fileInputStream = null;
    ByteArrayOutputStream byteArrayOutputStream = null;
    try {
        fileInputStream = new FileInputStream(file);
        byteArrayOutputStream = new ByteArrayOutputStream(64);
        int length = 0;
        byte[] buffer = new byte[1024];
        while ((length = fileInputStream.read(buffer)) != -1) {
            byteArrayOutputStream.write(buffer, 0, length);
        }
        return byteArrayOutputStream.toByteArray();
    } finally {
        if (fileInputStream != null) {
            fileInputStream.close();
        }
        if (byteArrayOutputStream != null) {
            byteArrayOutputStream.close();
        }
    }
}

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