如何检查会话是否无效 [英] How to check if a session is invalid

问题描述

如何检查会话是否无效？
API中没有方法。

How to check if a session is invalid or not? There is no method in the API.

是否与 isNew（）相同？如果没有，有什么区别？

Is it the same as isNew()? And what is the difference if not?

推荐答案

如果你想知道它是否有效，请根据请求：

If you want to know whether it valid based on a request:

request.isRequestedSessionIdValid()

  or

HttpSession sess = request.getSession(false);
if (sess != null) {
   // it's valid
}

如果您存储了对会话的引用并需要验证我会

If you have stored a reference to the session and need to validate I would

try {
  long sd = session.getCreationTime();
} catch (IllegalStateException ise) {
  // it's invalid
}

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