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

static private void addToZip(String path, String srcFile, ZipOutputStream zip) throws IOException {
    File folder = new File(srcFile);
    if (folder.isDirectory()) {
        addFolderToZip(path, srcFile, zip, true);
    } else {/*w  w  w  .ja  v a  2s .c  o m*/
        byte[] buf = new byte[1024];
        int len;
        FileInputStream in = null;
        try {
            in = new FileInputStream(srcFile);
            zip.putNextEntry(new ZipEntry(path + File.separator + folder.getName()));
            while ((len = in.read(buf)) > 0) {
                zip.write(buf, 0, len);
            }
        } finally {
            if (in != null)
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
    }
}

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From source file:Main.java

public static byte[] getByteArray(File filePath, String name) {
    FileInputStream fileInputStream = null;

    File file = new File(filePath, name);

    byte[] bFile = new byte[(int) file.length()];

    try {/*from w  ww  .  j av  a 2 s . c  o m*/
        //convert file into array of bytes
        fileInputStream = new FileInputStream(file);
        fileInputStream.read(bFile);
        fileInputStream.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return bFile;
}

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From source file:FileUtil.java

/**
 * Zip up a directory path/*from www.j  a va2s .  co  m*/
 * @param directory
 * @param zos
 * @param path
 * @throws IOException
 */
public static void zipDir(String directory, ZipOutputStream zos, String path) throws IOException {
    File zipDir = new File(directory);
    // get a listing of the directory content
    String[] dirList = zipDir.list();
    byte[] readBuffer = new byte[2156];
    int bytesIn = 0;
    // loop through dirList, and zip the files
    for (int i = 0; i < dirList.length; i++) {
        File f = new File(zipDir, dirList[i]);
        if (f.isDirectory()) {
            String filePath = f.getPath();
            zipDir(filePath, zos, path + f.getName() + "/");
            continue;
        }
        FileInputStream fis = new FileInputStream(f);
        try {
            ZipEntry anEntry = new ZipEntry(path + f.getName());
            zos.putNextEntry(anEntry);
            bytesIn = fis.read(readBuffer);
            while (bytesIn != -1) {
                zos.write(readBuffer, 0, bytesIn);
                bytesIn = fis.read(readBuffer);
            }
        } finally {
            fis.close();
        }
    }
}

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From source file:Main.java

public static void divideFile() throws IOException {
    String path = "F:/ar/";
    String base = "phoneAttribution";
    String ext = ".db";

    int split = 800 * 1024;
    byte[] buf = new byte[1024];
    int num = 1;/*from  w  w w  .  j  a v  a2  s  . c o m*/

    File inFile = new File(path + base + ext);
    FileInputStream fis = new FileInputStream(inFile);
    while (true) {
        FileOutputStream fos = new FileOutputStream(new File(path + base + num + ext));
        for (int i = 0; i < split / buf.length; i++) {
            int read = fis.read(buf);
            fos.write(buf, 0, buf.length);
            if (read < buf.length) {
                fis.close();
                fos.close();
                return;
            }
        }
        fos.close();
        num++;
    }
}

---

From source file:Main.java

public static byte[] createMD5(FileInputStream is) throws IOException {
    MessageDigest digester = null;
    try {/*from  w  w w  . ja v  a  2 s. c  o m*/
        digester = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[16 * 1024]; // 16k
        int length = 0;
        while ((length = is.read(buffer)) > 0) {
            digester.update(buffer, 0, length);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        is.close();
    }

    if (digester != null) {
        return digester.digest();
    }

    return null;
}

---

From source file:Main.java

public static void post(String actionUrl, String file) {
    try {/*from www  . ja va2 s . c  o  m*/
        URL url = new URL(actionUrl);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false);
        con.setRequestMethod("POST");
        con.setRequestProperty("Charset", "UTF-8");
        con.setRequestProperty("Content-Type", "multipart/form-data;boundary=*****");
        DataOutputStream ds = new DataOutputStream(con.getOutputStream());
        FileInputStream fStream = new FileInputStream(file);
        int bufferSize = 1024; // 1MB
        byte[] buffer = new byte[bufferSize];
        int bufferLength = 0;
        int length;
        while ((length = fStream.read(buffer)) != -1) {
            bufferLength = bufferLength + 1;
            ds.write(buffer, 0, length);
        }
        fStream.close();
        ds.flush();
        InputStream is = con.getInputStream();
        int ch;
        StringBuilder b = new StringBuilder();
        while ((ch = is.read()) != -1) {
            b.append((char) ch);
        }
        new String(b.toString().getBytes("ISO-8859-1"), "utf-8");
        ds.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:com.fredhopper.core.connector.index.FileUtils.java

public static void addToZipFile(final File file, final ZipOutputStream zos) throws IOException {

    final FileInputStream fis = new FileInputStream(file);
    final ZipEntry zipEntry = new ZipEntry(file.getName());
    zos.putNextEntry(zipEntry);/*from   w w  w  . j a va 2 s  .com*/

    final 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:Main.java

@SuppressWarnings("resource")
public static boolean isSameContent(String srcFilename, String destFilename) {

    try {//from   w  ww . j  a  va  2s .  c o  m

        FileInputStream src = new FileInputStream(srcFilename);
        FileInputStream dst = new FileInputStream(destFilename);

        byte[] bsrc = new byte[1024];
        byte[] bdst = new byte[1024];

        int n;
        while ((n = src.read(bsrc)) != -1) {
            int m = dst.read(bdst);

            if (m == -1)
                return false;

            if (m != n)
                return false;

            if (!Arrays.equals(bsrc, bdst))
                return false;
        }

        return true;
    } catch (Exception e) {
        return false;
    }
}

---

From source file:Main.java

public static byte[] getFileSHA1(String path) throws IOException {

    File file = new File(path);
    FileInputStream in = new FileInputStream(file);
    MessageDigest messagedigest;/*from   www.ja va 2  s.co m*/
    try {
        messagedigest = MessageDigest.getInstance("SHA-1");

        byte[] buffer = new byte[1024 * 64];
        int len;

        while ((len = in.read(buffer)) > 0) {
            messagedigest.update(buffer, 0, len);
        }

        return messagedigest.digest();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (OutOfMemoryError e) {
        e.printStackTrace();
        throw e;
    } finally {
        in.close();
    }
    return null;
}

---

From source file:Main.java

public static String getFileMD5String(File file) {
    if (!file.exists() || file.isFile()) {
        return null;
    }// www.  jav  a 2  s . c  om
    MessageDigest messagedigest;
    FileInputStream fis = null;
    try {
        fis = new FileInputStream(file);
        messagedigest = MessageDigest.getInstance("MD5");
        int len;
        byte[] buf = new byte[1024];
        while ((len = fis.read(buf)) != -1) {
            messagedigest.update(buf, 0, len);
        }
        byte md5Bytes[] = messagedigest.digest();
        StringBuffer stringbuffer = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            stringbuffer.append(HEX_DIGITS[(md5Bytes[i] & 0xf0) >>> 4]);
            stringbuffer.append(HEX_DIGITS[md5Bytes[i] & 0x0f]);
        }
        return stringbuffer.toString();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}

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