HttpSessionListener中获取Spring中的Bean

package com.tg.system;

import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.tg.module.member.bean.Member;
import com.tg.module.member.service.IMemberService;


public class DefaultSessionListener implements HttpSessionListener {

    public void sessionCreated(HttpSessionEvent arg0) {
    Member member = (Member) arg0.getSession().getAttribute("member");
          ApplicationContext ctx = WebApplicationContextUtils.
　　　　　　getRequiredWebApplicationContext(arg0.getSession().getServletContext());
　　　　　　
          IMemberService memberService = (IMemberService)ctx.getBean("memberService"); 
          Member visitor = memberService.findByMemberId("1");
          arg0.getSession().setAttribute("member", visitor);
          System.out.println("成功监听Session创建!");
    }

    public void sessionDestroyed(HttpSessionEvent se) {
    }
}