是将Facelets页面生成为Servlet作为JSP生成的Servlet [英] Is Facelets page generated to Servlet as JSP generated to Servlet

问题描述

由于所有的JSP都是在执行之前生成/翻译为Servlet的，所以对于Facelets也是如此。

As all JSPs are generated / translated to Servlets before their execution, is its true for Facelets too?

我使用JSF 2.0和Facelets，它生成的Java代码可能是Servlet。

I am working with JSF 2.0 and Facelets and wanted to see its generated Java Code which might be Servlet.

推荐答案

否，Facelets文件被解析为一个XML树使用 SAX解析器。 XML树存储在 Facelet缓存。 XML树位于查看构建时间变成 UIComponent 树，可通过 FacesContext＃getViewRoot（） （您可以在运行时通过 getChildren（）遍历。组件树通常通过自己的 encodeXxx（）方法或关联的 Renderer ，以 UIViewRoot＃encodeAll ） 。

No, Facelets files are parsed to a XML tree using a SAX parser. The XML tree is stored in the Facelet cache. The XML tree is during view build time turned into an UIComponent tree which is accessible by FacesContext#getViewRoot() (which you can traverse by getChildren() during runtime). The component tree normally generates HTML code by their own encodeXxx() methods or the ones on the associated Renderer, starting with UIViewRoot#encodeAll().

Facelets文件不要生成任何类文件。 XML树默认存储在服务器的内存中。自JSF 2.1起，您可以指定自定义 <$通过< facelet-cache-factory> 在 faces-config中执行 FaceletCache xml 其中你可以编写代码来存储XML树，例如磁盘文件系统（这将是更慢的，虽然）。

Facelets files do not generate any class files. The XML trees are by default stored in server's memory. Since JSF 2.1 you can however specify a custom FaceletCache implementation by <facelet-cache-factory> in faces-config.xml wherein you can write code to store the XML tree on for example the disk file system (which would be slower, though).

您在视图中使用< ui：debug> 并打开它，然后您可以看到 UIViewRoot 。另请参见如何调试JSF / EL

If you use <ui:debug> in the view and open it, then you can see the textual representation of the component tree behind UIViewRoot. See also how to debug JSF/EL

• 视图构建时间是什么？


• 在服务器请求后测量JSF视图的渲染时间

• Why not JSF pages are precompiled (atleast partially) but instead parsed, evaluated each time view is built?
• What's the view build time?
• Measure the render time of a JSF view after a server request
• Why Facelets is preferred over JSP as the view definition language from JSF2.0 onwards?

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