userdao.java

sorry i have only one

package cart.dao;

import cart.model.User;

import java.util.Collection;
import java.util.HashMap;
import java.sql.SQLException;
import java.sql.Connection;

abstract public class UserDao implements DAO
{
  public void insert(Connection con,Object o) throws SQLException{
    User user=(User)o;
  }

  public void update(Connection con,Object o) throws SQLException{
    User user=(User)o;
  }

  public void delete(Connection con,int id) throws SQLException{

  }

  public Object selectById(Connection con,int id) throws SQLException{
    User user=new User();
    return user;
  }
  public Collection selectAll(Connection con) throws SQLException{
    Collection collection=null;
    return collection;
  }

}