Object를 byte array로 쓰고 읽기

출처: http://scr4tchp4d.blogspot.com/2008/07/object-to-byte-array-and-byte-array-to.html
 
privimive 타입이나 java.io.Serializable 인터페이스가 구현 된 객체만 쓰고 읽을 수 있음

public byte[] toByteArray (Object obj)
{
  byte[] bytes = null;
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  try {
    ObjectOutputStream oos = new ObjectOutputStream(bos); 
    oos.writeObject(obj);
    oos.flush(); 
    oos.close(); 
    bos.close();
    bytes = bos.toByteArray ();
  }
  catch (IOException ex) {
    //TODO: Handle the exception
  }
  return bytes;
}
    
public Object toObject (byte[] bytes)
{
  Object obj = null;
  try {
    ByteArrayInputStream bis = new ByteArrayInputStream (bytes);
    ObjectInputStream ois = new ObjectInputStream (bis);
    obj = ois.readObject();
  }
  catch (IOException ex) {
    //TODO: Handle the exception
  }
  catch (ClassNotFoundException ex) {
    //TODO: Handle the exception
  }
  return obj;
}