dao.java

sorry i have only one

package cart.dao;

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

public interface DAO
{
  public void update(Connection con,Object o)throws Exception;
  public void insert(Connection con,Object o)throws Exception;
  public void delete(Connection con,int id)throws Exception;
  public Object selectById(Connection con,int id)throws Exception;
  public Collection selectAll(Connection con)throws Exception;
}