blocks|key|2152778|text|我有一个拦截器，它也将会话作为一张map抓取。你试过这样的东西吗？这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2152779|public+String+intercept(+ActionInvocation+actionInvocation+)+throws+Exception+{
++++Map+session+=+actionInvocation.getInvocationContext().getSession();|code-block|syntax|javascript|2152780|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have an interceptor that also grabs the session as a map. Have you tried something like this? This works for me.

<pre><code>public String intercept( ActionInvocation actionInvocation ) throws Exception {
 Map session = actionInvocation.getInvocationContext().getSession();
</code></pre>

blocks|key|246149|text|您可以使用以下代码返回HttpSession+--如果它不存在，则创建它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|246150|HttpSession+session+=+ServletActionContext.getRequest().getSession(true);|code-block|syntax|javascript|246151|如果您需要Map，那么您可以在最后一次调用之后立即调用它(因为您传递了true，会话将被创建，并且下一次调用将返回一个空的会话map)。|246152|Map<String,+Object>+session+=+ActionContext.getContext().getSession();|246153|或者，您可以在堆栈的早期使用CreateSessionInterceptor，以便在需要时创建会话。然后只需使用上面的地图示例来获取它。|246154|仅供参考：ServletActionContext是ActionContext的一个子类，它只提供了方便的方法来获取请求和响应，而不需要像在示例中那样使用常量。|246155|entityMap^0|B|B|0|0|0|0|E|O|0|5|K|Q|D|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|13|8|@$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@]|E|$]]|$1|S|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|T|$]]

You can use the following to return the <code>HttpSession</code> -- and create it if it doesn't exist.

<pre><code>HttpSession session = ServletActionContext.getRequest().getSession(true);
</code></pre>

If you need the Map instead, then you can just call this right after that last call (since you passed true, the session would have been created and the next call will return a blank session map).

<pre><code>Map&lt;String, Object&gt; session = ActionContext.getContext().getSession();
</code></pre>

Alternatively, you can use the <code>CreateSessionInterceptor</code> early in your stack so that the session is created by the time you need it. Then just use the map example above to get it.

FYI: <code>ServletActionContext</code> is a subclass of <code>ActionContext</code> that just has convenience methods for getting the request and response without needing to use the constants like you were trying in your example.

blocks|key|244692|text|尝尝这个。在struts+2.0.14中，它适用于我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|244693|public+String+intercept(ActionInvocation+ai)+throws+Exception+{

+++++Map+session+=+ActionContext.getContext().getSession();+|code-block|syntax|javascript|244694|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this. It worked for me in struts 2.0.14.

<pre><code>public String intercept(ActionInvocation ai) throws Exception {

 Map session = ActionContext.getContext().getSession(); 
</code></pre>

blocks|key|246166|text|添加导入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|246167|import+org.apache.struts2.StrutsStatics;|code-block|syntax|javascript|246168|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Add the import:

<pre><code>import org.apache.struts2.StrutsStatics;
</code></pre>

blocks|key|3073670|text|您可以使用以下代码片段使用ActionContext+itself...refer获取截取程序上的会话：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3073671|SessionMap<String,+Object>+session+=+ActionContext.getContext().getSession();|code-block|syntax|javascript|3073672|或者，您也可以遵循这种方法:请求在通过ThreadLocal提供的ActionContext实例上可用。|3073673|HttpServletRequest+request+=+ServletActionContext.getRequest();
HttpSession+session+=+request.getSession(true);|3073674|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can get the session on Interceptor using ActionContext itself...refer the following code snippet:

<pre><code>SessionMap&lt;String, Object&gt; session = ActionContext.getContext().getSession();
</code></pre>

or alternatively you can follow this approach:
The request is available on the ActionContext instance, which is made available via ThreadLocal.

<pre><code>HttpServletRequest request = ServletActionContext.getRequest();
HttpSession session = request.getSession(true);
</code></pre>

I am trying to access session object from within my interceptor by implementing <code>SessionAware</code> interface (I've implemented the <code>setSession</code> method), but I am not able to get my session object this way.

Then I tried <code>ActionContext.getContext().getSession()</code> and I am able to get the session, but I don't know but its coming out to be empty for only the first time in every browser for every user &amp; then it comes filled when another action is invoked. 

I assume there is something wrong going with the session. Why is it giving me an empty session only for the first time? Does it set something only after giving empty session for the first time?

If this is the case then everyone will be shown as guest on their first request &amp; then with a username on their 2nd request &amp; hence forth.

Or am I getting the session in the wrong way?

I saw code to get sessions in interceptors, but this does not work for me as it cannot find the constant <code>HTTP_REQUEST</code>. 

<pre><code>final ActionContext context = invocation.getInvocationContext();

HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);

HttpSession session = request.getSession(true);

Object user = session.getAttribute(Constants.USER_HANDLE);
</code></pre>

Any suggestion on resolving any of the problems?

Something I forgot to mention - my website is a secure site(https), so if the user is not logged in, it would not let him enter the website &amp; if he is logged in, at least his username should be there in the session. Shouldn't it be?

Struts 2 Session in interceptor

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我试图通过实现SessionAware接口(我已经实现了setSession方法)从拦截器中访问session对象，但我无法以这种方式获取session对象。然后我尝试了ActionContext.getContext().getSession()，我能够获得会话，但是我不知道，但是它只在每个浏览器中第一次对每个用户是...

问拦截器中的Struts 2会话
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