????????@Override
	public?void?doGet(HttpServletRequest?req,?HttpServletResponse?resp)
			throws?ServletException,?IOException?{
		//設置編碼
		req.setCharacterEncoding("utf-8");
		//接受頁面的值
		String?command?=?req.getParameter("command");
		String?description?=?req.getParameter("description");
		//向頁面傳值
		req.setAttribute("command",?command);
		req.setAttribute("description",?description);
		MaintainService?maintainService?=?new?MaintainService();
		//查詢消息列表并傳給頁面
		req.setAttribute("messageList",?maintainService.updateOne(command,?description));
		//頁面跳轉
		req.getRequestDispatcher("/List.action").forward(req,?resp);
	}

????????public?List<Message>?updateOne(String?command,?String?description){????????
????????		MessageDao?messageDao?=?new?MessageDao();
????????		return?messageDao.updateOne(command,?description);
????????	}

????????public?List<Message>?updateOne(String?command,?String?description){
		DBAccess?dbAccess?=?new?DBAccess();
		List<Message>?messageList?=?new?ArrayList<Message>();?
		SqlSession?sqlSession?=?null;
		try?{
			sqlSession?=?dbAccess.getSqlSession();
			Message?message?=?new?Message();
			message.setCommand(command);
			message.setDescription(description);
			sqlSession.update("Message.updateone",?message);
			sqlSession.commit();
			System.out.println("看看message是啥？"+message.getCommand());
		}?catch?(IOException?e)?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace();
		}?finally{
			if(sqlSession?!=?null){
				sqlSession.close();				
			}
		}
		return?messageList;
	}

????<update?id="updateone"?parameterType="com.imooc.bean.Message">
????????update?MESSAGE
????????set
????????COMMAND=#{command},DESCRIPTION=#{description}
????????where?ID=#{id}
????</update>

有沒有大神做了修改功能可以提供個參考呢？