<%AttributePrincipal principal1 = (AttributePrincipal) request.getUserPrincipal();
String username = principal1.getName(); %>本文共 177 字，大约阅读时间需要 1 分钟。
<%AttributePrincipal principal1 = (AttributePrincipal) request.getUserPrincipal();
String username = principal1.getName(); %>转载于:https://www.cnblogs.com/Jonecmnn/p/6816959.html