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 21:30:56
				 * @author             darkhe
				 * @version            1.0
				 */
				public abstract class AbstractEntityCollection implements EntityCollection
				{
				
				
					/**
					 * @param rs 
					 * @return
					 * @throws SQLException
					 * @see dark.db.entity.EntitySet#getEntitySet(java.sql.ResultSet)
					 */
					public List getList(ResultSet rs) throws SQLException
					{
						throw new SQLException("没有实现当前方式");		
					}
					/**
					 * @param sql
					 * @return
					 * @throws SQLException
					 * @see dark.db.entity.EntityCollection#getList(java.lang.String)
					 */
					public List getList(String sql) throws SQLException
					{
						throw new SQLException("没有实现当前方式");	
					}
				
				}