我自己实现了一个数据访问层

				package dark.db.entity;
				
				import java.sql.ResultSet;
				import java.sql.SQLException;
				import java.util.List;
				
				/**
				 * Title:            
				 * Description:      
				 * Copyright:        Copyright (c) 2003
				 * Company:          DIS
				 * Create Time:      2004-3-21 21:19:30
				 * @author             darkhe
				 * @version            1.0
				 */
				public interface EntityCollection
				{	
				   
				   /**
				    * 将记录集包裹成实体集
				    * @return
				    * @throws SQLException
				    */
				   public List getList(ResultSet rs) throws SQLException;
				   
				   /**
				    * 根据查询条件返回实体集
				    * @param sql
				    * @return
				    * @throws SQLException
				    */
				   public List getList(String sql) throws SQLException;
				}