Example usage for java.io FileInputStream FileInputStream

Introduction

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

Prototype

public FileInputStream(FileDescriptor fdObj)

Source Link

Document

Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("keyfile"));
    DESKeySpec ks = new DESKeySpec((byte[]) ois.readObject());
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    SecretKey key = skf.generateSecret(ks);

    Cipher c = Cipher.getInstance("DES/CFB8/NoPadding");
    c.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec((byte[]) ois.readObject()));
    CipherInputStream cis = new CipherInputStream(new FileInputStream("ciphertext"), c);
    BufferedReader br = new BufferedReader(new InputStreamReader(cis));
    System.out.println(br.readLine());
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    try {/*ww w  . jav a2  s  . co m*/
        String url = "jdbc:odbc:databaseName";
        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        String user = "guest";
        String password = "guest";
        FileInputStream fis = new FileInputStream("somefile.txt");
        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        Statement createTable = connection.createStatement();

        createTable.executeUpdate("CREATE TABLE source_code (name CHAR(20), source LONGTEXT)");

        String ins = "INSERT INTO source_code VALUES(?,?)";
        PreparedStatement statement = connection.prepareStatement(ins);

        statement.setString(1, "TryInputStream"); // Set first field
        statement.setAsciiStream(2, fis, fis.available()); // Stream is source

        int rowsUpdated = statement.executeUpdate();
        System.out.println("Rows affected: " + rowsUpdated);
        connection.close();
    } catch (Exception e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) {

    String s = "from java2s.com!";

    try {// ww w  . jav  a  2  s  .  c o m

        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os, Charset.defaultCharset());

        FileInputStream in = new FileInputStream("test.txt");

        writer.write(s, 0, 5);

        writer.flush();

        for (int i = 0; i < 5; i++) {
            System.out.print((char) in.read());
        }
        writer.close();
        in.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:MainClass.java

public static void main(String[] args) {
    File originFile = new File("c:\\file1.txt");
    File destinationFile = new File("c:\\file1.txt");
    if (!originFile.exists() || destinationFile.exists()) {
        return;//from w  w w.j av a  2 s .c  o m
    }
    try {
        byte[] readData = new byte[1024];
        FileInputStream fis = new FileInputStream(originFile);
        FileOutputStream fos = new FileOutputStream(destinationFile);
        int i = fis.read(readData);

        while (i != -1) {
            fos.write(readData, 0, i);
            i = fis.read(readData);
        }
        fis.close();
        fos.close();
    } catch (IOException e) {
        System.out.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    XMLInputFactory xif = XMLInputFactory.newInstance();
    XMLEventReader xmlr = xif.createXMLEventReader((new FileInputStream(new File("./file.xml"))));

    boolean inline = false;
    StringBuffer sb = new StringBuffer();
    while (xmlr.hasNext()) {
        XMLEvent event = xmlr.nextEvent();

        if (event.isStartElement()) {
            StartElement element = (StartElement) event;
            if ("data".equals(element.getName().toString().trim())) {
                inline = true;/*from w  w w.  ja  v  a  2  s.c o m*/
            }
        }

        if (inline) {
            sb.append(xmlr.peek());
        }

        if (event.isEndElement()) {
            EndElement element = (EndElement) event;
            if ("data".equals(element.getName().toString().trim())) {
                inline = false;
                System.out.println(sb.toString());
                sb.setLength(0);
            }
        }
    }
}

From source file:CompressIt.java

public static void main(String[] args) {
    String filename = args[0];// w w  w. java2s  . c o  m
    try {
        File file = new File(filename);
        int length = (int) file.length();
        FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis);
        ByteArrayOutputStream baos = new ByteArrayOutputStream(length);
        GZIPOutputStream gos = new GZIPOutputStream(baos);
        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = bis.read(buffer)) != -1) {
            gos.write(buffer, 0, bytesRead);
        }
        bis.close();
        gos.close();
        System.out.println("Input Length: " + length);
        System.out.println("Output Length: " + baos.size());
    } catch (FileNotFoundException e) {
        System.err.println("Invalid Filename");
    } catch (IOException e) {
        System.err.println("I/O Exception");
    }
}

From source file:MainClass.java

public static void main(String[] args) throws IOException {

    if (args.length != 3) {
        System.out.println("Usage: java TeeCopier infile outfile1 outfile2");
        return;// w  ww .  j  av  a  2 s . com
    }

    FileInputStream fin = new FileInputStream(args[0]);
    FileOutputStream fout1 = new FileOutputStream(args[1]);
    FileOutputStream fout2 = new FileOutputStream(args[2]);
    MyOutputStream tout = new MyOutputStream(fout1, fout2);
    copy(fin, tout);
    fin.close();
    tout.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String filename = "yourXML.xml";

    XMLInputFactory factory = XMLInputFactory.newInstance();
    System.out.println("FACTORY: " + factory);

    XMLEventReader r = factory.createXMLEventReader(filename, new FileInputStream(filename));

    while (r.hasNext()) {
        XMLEvent e = r.nextEvent();
        System.out.println(e.toString());
    }//from w  w w.  j  a  v  a 2s .  c om
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    Certificate[] certpath = new Certificate[args.length];
    CertificateFactory cf = CertificateFactory.getInstance("X.509");

    for (int i = 0; i < args.length; i++) {
        FileInputStream in = new FileInputStream(args[i]);
        certpath[i] = cf.generateCertificate(in);
    }/* w  ww .ja  v  a  2s. co m*/
    for (int i = 0; i < certpath.length - 1; i++) {
        Principal issuer = ((X509Certificate) certpath[i]).getIssuerDN();
        Principal subject = ((X509Certificate) certpath[i + 1]).getSubjectDN();
        if (!issuer.equals(subject)) {
            System.out.println("in " + i + " issuer is " + issuer);
            System.out.println("But in " + (i + 1));
            System.out.println("subject is " + subject);
            break;
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    oout.writeUTF("Hello World from java2s.com");
    oout.flush();/*from   w  ww .  ja  v  a  2s  . com*/
    oout.close();

    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    for (int i = 0; i < ois.available();) {
        System.out.print((char) ois.read());
    }
    ois.close();
}