Apache common source code reading 1

java open-source code

SerializationUtils

• void Serialize

 public static void serialize(final Serializable obj, final OutputStream outputStream) {
        if (outputStream == null) {
            throw new IllegalArgumentException("The OutputStream must not be null");
        }
        ObjectOutputStream out = null;
        try {
            // stream closed in the finally
            out = new ObjectOutputStream(outputStream);
            out.writeObject(obj);
        } catch (final IOException ex) {
            throw new SerializationException(ex);
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (final IOException ex) { // NOPMD
                // ignore close exception
            }
        }
    }

• deserialize

public static <T> T deserialize(final InputStream inputStream) {
        if (inputStream == null) {
            throw new IllegalArgumentException("The InputStream must not be null");
        }
        ObjectInputStream in = null;
        try {
            // stream closed in the finally
            in = new ObjectInputStream(inputStream);
            @SuppressWarnings("unchecked") // may fail with CCE if serialised form is incorrect
            final T obj = (T) in.readObject();
            return obj;
        } catch (final ClassCastException ex) {
            throw new SerializationException(ex);
        } catch (final ClassNotFoundException ex) {
            throw new SerializationException(ex);
        } catch (final IOException ex) {
            throw new SerializationException(ex);
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (final IOException ex) { // NOPMD
                // ignore close exception
            }
        }
    }

• A test

public void serializationUtilsDemo() {
        System.out.println ("*SerializationUtils**");
        Date date = new Date();
        byte[] bytes = SerializationUtils.serialize (date);
        System.out.println (ArrayUtils.toString (bytes) );
        System.out.println (date);
        Date reDate = (Date) SerializationUtils.deserialize (bytes);
        System.out.println (reDate);
        System.out.println (ObjectUtils.equals (date, reDate) );
        System.out.println (date == reDate);
        FileOutputStream fos = null;
        FileInputStream fis = null;
        try {
            fos = new FileOutputStream (new File ("./serialize_test.txt") );
            fis = new FileInputStream (new File ("./serialize_test.txt") );
            SerializationUtils.serialize (date, fos);
            Date reDate2 = (Date) SerializationUtils.deserialize (fis);
            System.out.println (date.equals (reDate2) );
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                fos.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

the result is :

SerializationUtils*
{-84,-19,0,5,115,114,0,14,106,97,118,97,46,117,116,105,108,46,68,97,116,101,104,106,-127,1,75,89,116,25,3,0,0,120,112,119,8,0,0,1,71,-61,123,-20,-66,120}
Sun Aug 10 22:13:04 PDT 2014
Sun Aug 10 22:13:04 PDT 2014
true
false
true