spring MVC项目中ThreadPoolTaskExecutor多线程注解为什么失败?

现web项目中存在一个正常的登陆功能，想在登陆的同时利用多线程添加一些额外的功能，代码如下：
controller:

    @ResponseBody
    @RequestMapping(value="/login",method=RequestMethod.POST)
    public Massage<UserBean> login(HttpServletRequest request,String name,String password) {
        Massage<UserBean> massage = loginService.login(name,password);
        //TODO 此处利用多线程记录日志操作
        return massage;
    }

service:

    @Override
    public Massage<UserBean> login(String name ,String password) {
        Massage<UserBean> massage = new Massage<UserBean>();
        UserBean user = userBeanMapper.selectByName(name);
        if (user == null) {
            massage.setSyscode("001");
            massage.setMsg("用户名称错误！");
            logger.info("登陆失败：" + "name("+name+")" +"用户名称错误！");
        }else if(!user.getPassword().equals(password)){
            massage.setSyscode("002");
            massage.setMsg("用户密码错误！");
            logger.info("登陆失败：" + "name("+name+")" +"用户密码错误！");
        }else{
            massage.setT(user);
            massage.setSyscode("000");
        }
        return massage;
    }

修改后：
controller:

    @ResponseBody
    @RequestMapping(value="/login",method=RequestMethod.POST)
    public Massage<UserBean> login(HttpServletRequest request,String name,String password) {
        Massage<UserBean> massage = loginService.login(name,password);
        //TODO 此处添加记录日志操作
        if("000".equals(massage.getSyscode())){//登陆成功
            WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
            ThreadPoolTaskExecutor threadPool = (ThreadPoolTaskExecutor) context.getBean("threadPool");
            threadPool.execute(new LoginRecordTask(name, massage.getSyscode()));
        }
        return massage;
    }

public class LoginRecordTask implements Runnable {

    private final static Logger logger = LoggerFactory.getLogger(LoginRecordTask.class);
    
    private String name;
    private String syscode;
    
    @Autowired
    private LoginService loginService;

    public LoginRecordTask(String name, String syscode) {
        super();
        this.name = name;
        this.syscode = syscode;
    }

    @Override
    public void run() {
        logger.info("登陆日志记录开始。。。");
        loginService.recordLogin(name);
        logger.info("登陆日志记录结束。。。");
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSyscode() {
        return syscode;
    }

    public void setSyscode(String syscode) {
        this.syscode = syscode;
    }

}

测试发现：在LoginRecordTask中的loginService报了空指针，也就是未注入成功。。。

整了很久也没弄好，感谢知情者举手之劳！