java深度clone

public  Object deepClone()
    throws  IOException, ClassNotFoundException {
    //将对象写入流
    ByteArrayOutputStream bo =
        new  ByteArrayOutputStream();
    ObjectOutputStream oo =
        new  ObjectOutputStream(bo);
    oo.writeObject(this );

    //从流里读回来
    ByteArrayInputStream bi =
        new  ByteArrayInputStream(bo.toByteArray());
    ObjectInputStream oi =
        new  ObjectInputStream(bi);

    return  (oi.readObject());
}