import org.acegisecurity.providers.AbstractAuthenticationToken; //导入依赖的package包/类
@Override
public void onApplicationEvent(ApplicationEvent event) {
    if (event instanceof AbstractAuthenticationFailureEvent) {
        if (event.getSource() instanceof AbstractAuthenticationToken) {
            AbstractAuthenticationToken token = (AbstractAuthenticationToken) event.getSource();
            Object details = token.getDetails();
            if (details instanceof WebAuthenticationDetails) {
                loginFailureLogger.log(((WebAuthenticationDetails) details).getRemoteAddress(), String.valueOf(token.getPrincipal()));
            }
        }
    }

}