尝试测试用户是否已登录，我正在使用以下代码：

<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>

<sec:authorize access="isAuthenticated()">
   YES, you are logged in!
</sec:authorize>

但是我得到以下错误了吗？

javax.servlet.jsp.JspException: No visible WebSecurityExpressionHandler instance could be found in the application context. There must be at least one in order to support expressions in JSP 'authorize' tags.
        at org.springframework.security.taglibs.authz.AuthorizeTag.getExpressionHandler(AuthorizeTag.java:100)
        at org.springframework.security.taglibs.authz.AuthorizeTag.authorizeUsingAccessExpression(AuthorizeTag.java:58)
        at org.springframework.security.taglibs.authz.AuthorizeTag.doStartTag(AuthorizeTag.java:48)