JSF2：标签未呈现，但通常的“修复”已呈现没有削减它

发布于 2024-12-09 12:51:36 字数 3025 浏览 0 评论 0原文

我的问题类似于： JSF 标签未呈现，JSf 标签未渲染以及 JSF 标签未呈现为 HTML 没有任何建议对我有帮助。

基本上问题是，无论是否通过欢迎页面，页面都不会呈现。 IE 尝试下载该文件，而 Chrome 基本上只是跳过所有 jsf 标签。很明显它不是由框架翻译的，但我不明白为什么。

背景故事是我做了一个将系统从 jsf 1.2 转换为 jsf2 的试点。试点取得了成功，我设法让它在试点分支中发挥作用。然而，当我这次尝试真正实现同样的目标时，我无法让它发挥作用。

通常的问题似乎是（根据资深回答者 BalusC 的说法）：

页面 URL 与 FacesServlet 的 url 模式不匹配，因此它没有任何机会解析标签。或者：标签中缺少 JSF 组件的 xmlns 声明，因此它被视为纯文本。

通常的修复似乎是：在 html 声明中包含 xmlns（我在 web.xml 和 .xhtml 文件中都有这个）在 web.xml 中包含或修改 Faces Servlet 映射。然而我却找不到我的错。我还尝试将 /faces/* 切换为 *.xhtml。我认为与 web.xml 相关的部分如下（整个文件很大，这是一个大系统）：

web.xml 的一部分：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-app_2_5.xsd"
    version="2.5">

<context-param>
    <description>
        Tell the runtime where we are in the project development
        lifecycle.
    </description>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
</context-param>

<context-param>
    <param-name>facelets.DEVELOPMENT</param-name>
    <param-value>true</param-value>
</context-param>
    <context-param>
    <param-name>com.sun.faces.expressionFactory</param-name>
    <param-value>com.sun.el.ExpressionFactoryImpl</param-value>
</context-param>
<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
  <servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
<url-pattern>*.xhtml</url-pattern>

 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
    <param-value>.xhtml</param-value>
  </context-param>
<welcome-file-list id="default">
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
    </welcome-file-list>

我知道欢迎文件是一个 html 文件，但这在试点中有效。该文件使用

<body bgcolor="#FFFFFF" onload="window.location='portal/login/login.jsf'">
</body>

使事情顺利进行。如果我手动将地址输入到某个包含少量简单代码的随机测试页面中，问题仍然会发生，因此问题感觉与欢迎页面无关。

我很乐意提供任何其他信息，但我真的陷入了困境。感谢您的阅读。

原文

My problem is similar to:
JSF tags not rendered, JSf tags not being rendered and also JSF tags not being rendered as HTML no suggestion there helped me.

Basically the problem is that regardless of going through a welcome page or not the page is not rendered. IE tries to download the file and chrome basically just skips all the jsf tags. It's obvious that it wasn't translated by the framework but I don't understand why.

The back story is that I did a pilot for a conversion of a system from jsf 1.2 into jsf2. The pilot was successful I managed to get it to work in the pilot branch. However when I'm trying to achieve the same thing for real this time I can't get it to work.

The usual problem seems to be (accordingly to veteran answerer BalusC):

The page URL did not match the url-pattern of the FacesServlet, thus it had not any chance to parse the tags.
OR: The xmlns declarations for JSF components are missing in tag, thus it was treated as plaintext.

The usual fixes seems to be:
Include xmlns in html declaration (I have this in both web.xml and the .xhtml files)
Include or modify Faces Servlet Mapping in web.xml. I can however find no fault in mine. I also tried switching out /faces/* to *.xhtml. Parts that I see as relevant in web.xml included below (Whole file is big, this is a big system):

Part of web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-app_2_5.xsd"
    version="2.5">

<context-param>
    <description>
        Tell the runtime where we are in the project development
        lifecycle.
    </description>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
</context-param>

<context-param>
    <param-name>facelets.DEVELOPMENT</param-name>
    <param-value>true</param-value>
</context-param>
    <context-param>
    <param-name>com.sun.faces.expressionFactory</param-name>
    <param-value>com.sun.el.ExpressionFactoryImpl</param-value>
</context-param>
<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
  <servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
<url-pattern>*.xhtml</url-pattern>

 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
    <param-value>.xhtml</param-value>
  </context-param>
<welcome-file-list id="default">
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
    </welcome-file-list>

I'm aware that the welcome file is a html file but this worked in the pilot. That file uses

<body bgcolor="#FFFFFF" onload="window.location='portal/login/login.jsf'">
</body>

To get things going. if I manually type the adress in to some random test page containing little and simple code the problem still occurs so the problem feels unrelated to welcome page.

Will gladly assist with any additional information and I'm really stuck here in a bad spot. Thanks for reading.

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