yelu cas 在cas服务器视图(jsp页面)中获取登陆名

<%

org.jasig.cas.authentication.principal.UsernamePasswordCredentials a=(org.jasig.cas.authentication.principal.UsernamePasswordCredentials)request.getAttribute("credentials");

if (a==null){

    out.print("null");

}else{

    out.print("not  null："+a.getClass().getName());

    out.print("帐号："+a.getUsername()); 

}

 %>