Shiro 标签

public int onDoStartTag() throws JspException {
    // 判断用户是否已经认证通过
    if (getSubject() != null && getSubject().isAuthenticated()) {
        if (log.isTraceEnabled()) {
            log.trace("Subject exists and is authenticated.  Tag body will be evaluated.");
        }
        // 显示标签内的内容
        return TagSupport.EVAL_BODY_INCLUDE;
    } else {
        if (log.isTraceEnabled()) {
            log.trace("Subject does not exist or is not authenticated.  Tag body will not be evaluated.");
        }
        // 不显示标签内的内容
        return TagSupport.SKIP_BODY;
    }
}