Example usage for java.io ObjectOutputStream ObjectOutputStream

List of usage examples for java.io ObjectOutputStream ObjectOutputStream

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Introduction

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

Prototype

public ObjectOutputStream(OutputStream out) throws IOException

Source Link

Document

Creates an ObjectOutputStream that writes to the specified OutputStream.

Usage

From source file:PersonExt.java

public static void main(String[] args) {
    PersonExt p1 = new PersonExt("John", "Male", 6.7);
    PersonExt p2 = new PersonExt("Wally", "Male", 5.7);
    PersonExt p3 = new PersonExt("Katrina", "Female", 5.4);

    File fileObject = new File("personext.ser");

    try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(fileObject))) {
        oos.writeObject(p1);//from w w  w  . j  av  a  2  s.  com
        oos.writeObject(p2);
        oos.writeObject(p3);

        System.out.println(p1);
        System.out.println(p2);
        System.out.println(p3);
    } catch (IOException e1) {
        e1.printStackTrace();
    }

    fileObject = new File("personext.ser");

    try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(fileObject))) {

        p1 = (PersonExt) ois.readObject();
        p2 = (PersonExt) ois.readObject();
        p3 = (PersonExt) ois.readObject();

        // Let's display the objects that are read
        System.out.println(p1);
        System.out.println(p2);
        System.out.println(p3);

        // Print the input path
        System.out.println("Objects were  read   from  " + fileObject.getAbsolutePath());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:net.sf.jabb.util.text.test.KeywordMatcherExample.java

/**
 * @param args//from w w w  .j a  va  2 s  .c  o m
 * @throws IOException 
 * @throws ClassNotFoundException 
 */
public static void main(String[] args) throws IOException, ClassNotFoundException {
    System.out.println("====  ====");
    KeywordMatcher m = showExample(null);

    System.out.println("==== ? ====");
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(baos);
    oos.writeObject(m);
    byte[] binary = baos.toByteArray();
    ByteArrayInputStream bais = new ByteArrayInputStream(binary);
    ObjectInputStream ois = new ObjectInputStream(bais);
    KeywordMatcher m2 = (KeywordMatcher) ois.readObject();
    showExample(m2);

    System.out.println("==== ? ====");
    KeywordMatcher m3 = new KeywordMatcher(m);
    showExample(m3);

}

From source file:Blip1.java

public static void main(String[] args) throws IOException, ClassNotFoundException {
    System.out.println("Constructing objects:");
    Blip1 b1 = new Blip1();
    Blip2 b2 = new Blip2();
    ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("Blips.out"));
    System.out.println("Saving objects:");
    o.writeObject(b1);/*from  w w  w  . j  av  a 2 s . co m*/
    o.writeObject(b2);
    o.close();
    // Now get them back:
    ObjectInputStream in = new ObjectInputStream(new FileInputStream("Blips.out"));
    System.out.println("Recovering b1:");
    b1 = (Blip1) in.readObject();
    // OOPS! Throws an exception:
    //! System.out.println("Recovering b2:");
    //! b2 = (Blip2)in.readObject();
}

From source file:Blip3.java

public static void main(String[] args) throws IOException, ClassNotFoundException {
    System.out.println("Constructing objects:");
    Blip3 b3 = new Blip3("A String ", 47);
    System.out.println(b3);/*ww  w .  ja  v  a 2s  . co  m*/
    ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("Blip3.out"));
    System.out.println("Saving object:");
    o.writeObject(b3);
    o.close();
    // Now get it back:
    ObjectInputStream in = new ObjectInputStream(new FileInputStream("Blip3.out"));
    System.out.println("Recovering b3:");
    b3 = (Blip3) in.readObject();
    System.out.println(b3);
}

From source file:TestCipher.java

public static void main(String args[]) throws Exception {
    Set set = new HashSet();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
        Point point = new Point(random.nextInt(1000), random.nextInt(2000));
        set.add(point);/*from w w  w.  jav a  2  s .com*/
    }
    int last = random.nextInt(5000);

    // Create Key
    byte key[] = password.getBytes();
    DESKeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

    // Create Cipher
    Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    desCipher.init(Cipher.ENCRYPT_MODE, secretKey);

    // Create stream
    FileOutputStream fos = new FileOutputStream("out.des");
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    CipherOutputStream cos = new CipherOutputStream(bos, desCipher);
    ObjectOutputStream oos = new ObjectOutputStream(cos);

    // Write objects
    oos.writeObject(set);
    oos.writeInt(last);
    oos.flush();
    oos.close();

    // Change cipher mode
    desCipher.init(Cipher.DECRYPT_MODE, secretKey);

    // Create stream
    FileInputStream fis = new FileInputStream("out.des");
    BufferedInputStream bis = new BufferedInputStream(fis);
    CipherInputStream cis = new CipherInputStream(bis, desCipher);
    ObjectInputStream ois = new ObjectInputStream(cis);

    // Read objects
    Set set2 = (Set) ois.readObject();
    int last2 = ois.readInt();
    ois.close();

    // Compare original with what was read back
    int count = 0;
    if (set.equals(set2)) {
        System.out.println("Set1: " + set);
        System.out.println("Set2: " + set2);
        System.out.println("Sets are okay.");
        count++;
    }
    if (last == last2) {
        System.out.println("int1: " + last);
        System.out.println("int2: " + last2);
        System.out.println("ints are okay.");
        count++;
    }
    if (count != 2) {
        System.out.println("Problem during encryption/decryption");
    }
}

From source file:ObjectStreamTest.java

public static void main(String[] args) {
    Employee harry = new Employee("Harry Hacker", 50000, 1989, 10, 1);
    Manager carl = new Manager("Carl Cracker", 80000, 1987, 12, 15);
    carl.setSecretary(harry);/* ww  w.  j a  v  a  2  s .  c o m*/
    Manager tony = new Manager("Tony Tester", 40000, 1990, 3, 15);
    tony.setSecretary(harry);

    Employee[] staff = new Employee[3];

    staff[0] = carl;
    staff[1] = harry;
    staff[2] = tony;

    try {
        // save all employee records to the file employee.dat
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("employee.dat"));
        out.writeObject(staff);
        out.close();

        // retrieve all records into a new array
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("employee.dat"));
        Employee[] newStaff = (Employee[]) in.readObject();
        in.close();

        // raise secretary's salary
        newStaff[1].raiseSalary(10);

        // print the newly read employee records
        for (Employee e : newStaff)
            System.out.println(e);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:AESTest.java

public static void main(String[] args) {
    try {// w  ww.j  a  v  a  2  s  .  co  m
        if (args[0].equals("-genkey")) {
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            SecureRandom random = new SecureRandom();
            keygen.init(random);
            SecretKey key = keygen.generateKey();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(key);
            out.close();
        } else {
            int mode;
            if (args[0].equals("-encrypt"))
                mode = Cipher.ENCRYPT_MODE;
            else
                mode = Cipher.DECRYPT_MODE;

            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key key = (Key) keyIn.readObject();
            keyIn.close();

            InputStream in = new FileInputStream(args[1]);
            OutputStream out = new FileOutputStream(args[2]);
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(mode, key);

            crypt(in, out, cipher);
            in.close();
            out.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (GeneralSecurityException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}

From source file:SignatureTest.java

public static void main(String[] args) {
    try {//from w  ww  . j a  v  a 2  s. c  o m
        if (args[0].equals("-genkeypair")) {
            KeyPairGenerator pairgen = KeyPairGenerator.getInstance("DSA");
            SecureRandom random = new SecureRandom();
            pairgen.initialize(KEYSIZE, random);
            KeyPair keyPair = pairgen.generateKeyPair();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(keyPair.getPublic());
            out.close();
            out = new ObjectOutputStream(new FileOutputStream(args[2]));
            out.writeObject(keyPair.getPrivate());
            out.close();
        } else if (args[0].equals("-sign")) {
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            PrivateKey privkey = (PrivateKey) keyIn.readObject();
            keyIn.close();

            Signature signalg = Signature.getInstance("DSA");
            signalg.initSign(privkey);

            File infile = new File(args[1]);
            InputStream in = new FileInputStream(infile);
            int length = (int) infile.length();
            byte[] message = new byte[length];
            in.read(message, 0, length);
            in.close();

            signalg.update(message);
            byte[] signature = signalg.sign();

            DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
            int signlength = signature.length;
            out.writeInt(signlength);
            out.write(signature, 0, signlength);
            out.write(message, 0, length);
            out.close();
        } else if (args[0].equals("-verify")) {
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[2]));
            PublicKey pubkey = (PublicKey) keyIn.readObject();
            keyIn.close();

            Signature verifyalg = Signature.getInstance("DSA");
            verifyalg.initVerify(pubkey);

            File infile = new File(args[1]);
            DataInputStream in = new DataInputStream(new FileInputStream(infile));
            int signlength = in.readInt();
            byte[] signature = new byte[signlength];
            in.read(signature, 0, signlength);

            int length = (int) infile.length() - signlength - 4;
            byte[] message = new byte[length];
            in.read(message, 0, length);
            in.close();

            verifyalg.update(message);
            if (!verifyalg.verify(signature))
                System.out.print("not ");
            System.out.println("verified");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:cn.lynx.emi.license.GenerateLicense.java

public static void main(String[] args) throws ClassNotFoundException, ParseException {
    if (args == null || args.length != 4) {
        System.err.println("Please provide [machine code] [cpu] [memory in gb] [yyyy-MM-dd] as parameter");
        return;/*from   w  w  w.ja v  a2s.  c om*/
    }

    InputStream is = GenerateLicense.class.getResourceAsStream("/privatekey");
    BufferedReader br = new BufferedReader(new InputStreamReader(is));
    String key = null;
    try {
        key = br.readLine();
    } catch (IOException e) {
        System.err.println(
                "Can't read the private key file, make sure there's a file named \"privatekey\" in the root classpath");
        e.printStackTrace();
        return;
    }

    if (key == null) {
        System.err.println(
                "Can't read the private key file, make sure there's a file named \"privatekey\" in the root classpath");
        return;
    }

    String machineCode = args[0];
    int cpu = Integer.parseInt(args[1]);
    long mem = Long.parseLong(args[2]) * 1024 * 1024 * 1024;
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    long expDate = sdf.parse(args[3]).getTime();

    LicenseBean lb = new LicenseBean();
    lb.setCpuCount(cpu);
    lb.setMemCount(mem);
    lb.setMachineCode(machineCode);
    lb.setExpireDate(expDate);

    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream os = new ObjectOutputStream(baos);
        os.writeObject(lb);
        os.close();

        String serializedLicense = Base64.encodeBase64String(baos.toByteArray());
        System.out.println("License:" + encrypt(key, serializedLicense));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:RSATest.java

public static void main(String[] args) {
    try {//from   www .j a  v  a 2  s  .  com
        if (args[0].equals("-genkey")) {
            KeyPairGenerator pairgen = KeyPairGenerator.getInstance("RSA");
            SecureRandom random = new SecureRandom();
            pairgen.initialize(KEYSIZE, random);
            KeyPair keyPair = pairgen.generateKeyPair();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(keyPair.getPublic());
            out.close();
            out = new ObjectOutputStream(new FileOutputStream(args[2]));
            out.writeObject(keyPair.getPrivate());
            out.close();
        } else if (args[0].equals("-encrypt")) {
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            SecureRandom random = new SecureRandom();
            keygen.init(random);
            SecretKey key = keygen.generateKey();

            // wrap with RSA public key
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key publicKey = (Key) keyIn.readObject();
            keyIn.close();

            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.WRAP_MODE, publicKey);
            byte[] wrappedKey = cipher.wrap(key);
            DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
            out.writeInt(wrappedKey.length);
            out.write(wrappedKey);

            InputStream in = new FileInputStream(args[1]);
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            crypt(in, out, cipher);
            in.close();
            out.close();
        } else {
            DataInputStream in = new DataInputStream(new FileInputStream(args[1]));
            int length = in.readInt();
            byte[] wrappedKey = new byte[length];
            in.read(wrappedKey, 0, length);

            // unwrap with RSA private key
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key privateKey = (Key) keyIn.readObject();
            keyIn.close();

            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.UNWRAP_MODE, privateKey);
            Key key = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);

            OutputStream out = new FileOutputStream(args[2]);
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);

            crypt(in, out, cipher);
            in.close();
            out.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (GeneralSecurityException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}