spring和ibatis集成servlet

package com.huawei.test.ibatis.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.huawei.test.ibatis.dto.MessageInfo;
import com.huawei.test.ibatis.service.MessageImpl;

/**
* <一句話功能簡述>
* <功能詳細描述>
*
* @author zKF31134(zengfengjiao)
* Created：2010-10-15
* @since HedEx Server V100R002C12/模塊
*/
public class MessageServlet extends HttpServlet
{
// private static WebApplicationContext context;
private MessageImpl getSimpleExample(){
ApplicationContext context = new ClassPathXmlApplicationContext("com/huawei/test/ibatis/applicationContext-system.xml");
return (MessageImpl)context.getBean("MessageServiceImpl");


//WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();
//return (IMessageDAO)SpringBeans.getBean("IMessageService");
}

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{

doPost(request,response);
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
List<MessageInfo> mList = new ArrayList();
mList = this.getSimpleExample().getAllMessage();
System.out.println(mList.size());

}

}