public class UserHttpSessionEventPublisher implements HttpSessionListener
{
    
    private static final String LOGGER_NAME = UserHttpSessionEventPublisher.class.getName();
    
    //~ Methods ========================================================================================================


   /* ApplicationContext getContext(ServletContext servletContext)
    {
        return WebApplicationContextUtils.getWebApplicationContext(servletContext);
    }*/
    
    /**
     * Handles the HttpSessionEvent by publishing a {@link HttpSessionCreatedEvent} to the application
     * appContext.
     *
     * @param event HttpSessionEvent passed in by the container
     */
    public void sessionCreated(HttpSessionEvent event) {
        在这里累加，（可通过保存在session里的登录用户信息，判断是不是同一人，）

    }

    
    @Override
    public void sessionDestroyed(HttpSessionEvent event){
      在这里-1；
     }