**2-1. 介面式程式設計**

介面可以規範型別

呼叫:getMapper

public class MessageDao {
	public List<Message> queryMessageList(String command,String description){
		List<Message> messageList = new ArrayList<Message>();
		DBAccess dbAccess=new DBAccess();
		SqlSession sqlSession = null;
		try {
			sqlSession = dbAccess.getSqlSession();
			Message message = new Message();
			message.setCommand(command);
			message.setDescription(description);
			IMessage iMessage = sqlSession.getMapper(IMessage.class);
			//通過sqlSession執行SQL語句
			messageList = iMessage.queryMessageList(message);// sqlSession.selectList("Message.queryMessageList",message);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(sqlSession!=null){
				sqlSession.close();
			}
		}
		
		return messageList;
	}
}
 

1. IMessage.queryMessageList();

利用泛型作為引數

**2-2. 介面式程式設計原理(中)**

1.