JSF2.0 中会话如何设置和取消设置
我想了解如何在 JSF2.0 中设置和取消设置会话。虽然关注了一些博客和书籍（Core JavaServer Faces-3rd Edition），但我知道使用注释@SessionScoped我们可以将任何管理bean设置为会话。我有一个 loginBean，它是 @ManagedBean 和 SessionScoped 声明的。在我的网站的右上角，有登录按钮。 当创建此会话时（我没有手动设置它，这就是我感到困惑的原因）以及当我被销毁时？它必须通过超时或仅通过单击注销按钮来销毁。
I want to know about setting and un-setting the session in JSF2.0. Although following some blogs and books (Core JavaServer Faces-3rd Edition), i got to know that using annotation @SessionScoped we can set any manage bean to be in session. I have a loginBean which is @ManagedBean and SessionScoped declared. On the top right corner, my web has login button.
When this session is created (i am not setting it manually, that is why i am confused) and when i gets destroyed? It must be destroyed either by time out or by clicking in logout button only.
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JSF 在幕后使用 Servlet API。会话范围的托管 bean 本质上是设置为
HttpSession。每当第一次计算引用托管 bean#{sessionBean}的 EL 表达式时，都会创建并设置它。每当会话过期（由于客户端重新启动或服务器超时）或失效时，它将从会话中“删除”。如果您让注销按钮调用ExternalContext#invalidateSession()，则会话将失效。如果您熟悉基本的 Servlet API，您应该已经了解这一切是如何工作的。要深入了解 Servlet 的
HttpSession在 JSF 的支持下工作，请阅读以下答案：Servlet 如何工作？实例化、会话、共享变量和多线程。JSF uses the Servlet API under the covers. A session scoped managed bean is in essence set as an attribute of the
HttpSession. It will be created and set whenever the EL expression referencing the managed bean#{sessionBean}is evaluated for the first time. It will be "removed" from the session whenever the session expires (by either a restart of the client or a timeout in the server) or get invalidated. If you let your logout button callExternalContext#invalidateSession(), then the session will be invalidated.If you're familiar with the basic Servlet API, you should already understand how this all works. For an in-depth explanation of the Servlet's
HttpSessionworks under JSF's covers, read this answer: How do servlets work? Instantiation, sessions, shared variables and multithreading.在jsf 2.0中，我们可以将总类ob设置为会话，就像我提到的
Class_name sm一样；
ExternalContext extContext = FacesContext.getCurrentInstance().getExternalContext(); extContext.getSessionMap().put("给出访问该属性的名称",sm);
Class_name sm = (Class_name) extContext.getSessionMap().get("给出访问此属性的名称");
In jsf 2.0 we can set total class ob as session like i mention
Class_name sm;
ExternalContext extContext = FacesContext.getCurrentInstance().getExternalContext(); extContext.getSessionMap().put("Give name for access this property",sm);
Class_name sm = (Class_name) extContext.getSessionMap().get("Give name for access this property");