java.lang.ClassCastException: org.jasig.cas.client.authentication.AttributePrincipalImpl cannot be cast to org.springframework.security.cas.authentication.CasAuthenticationToken
com.chinamobile.bcop.user.sso.UserInjectFilter.doFilter(UserInjectFilter.java:46)
UserInjectFilter.java:46的代码
CasAuthenticationToken principal = (CasAuthenticationToken) ((HttpServletRequest) httpRequest).getUserPrincipal();