DAO

Q. 리팩토링과 리스트럭팅의 차이?

<디자인 패턴>

  public abstract class UserDao{
      public void add(User user) throws ClassNotFoundException, SQLException{
          Connection c = getConnection();
          ...
      }
      public User get(String id) throws ClassNotFoundException, SQLException {
          Connection c = getConnection();
          ...
      }
      public abstract Connection getConnection() throws ClassNotFoundException, SQLException;
  }