问题描述
我们正在将 JSF 1.1 (MyFaces) 项目迁移到 JSF 2.这个想法是通过将 JSP 和 XHTML 保持在一起一段时间来定期迁移.我们在 JSP 页面中使用了很多 ajax4jsf-1.1.1 标签.我们不使用 RichFaces.将系统配置为 JSF 2 后(在 Balusc 的教程中提到了所有配置更改)当尝试使用类路径中的 ajax4jsf.jar 访问 JSP 页面时，我们得到一个异常:
We are migrating JSF 1.1 (MyFaces) project to JSF 2. The idea is to migrate periodically by keeping both JSP and XHTML together for some time. We use many ajax4jsf-1.1.1 tags in JSP pages. We don't use RichFaces. After configuring the system to JSF 2 (with all config changes mentioned in tutorial by Balusc) When tried to access the JSP page with ajax4jsf.jar in classpath, we get an exception:
Caused by: java.lang.IllegalStateException: setViewHandler may not be executed after a lifecycle request has been completed
at org.apache.myfaces.application.ApplicationImpl.setViewHandler(ApplicationImpl.java:853)
at org.ajax4jsf.framework.ajax.InitPhaseListener.beforePhase(InitPhaseListener.java:92)
at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersBefore(PhaseListenerManager.java:76)
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:131)
看起来 ajax4jsf.jar 与 JSF 2 不兼容.生命周期配置看起来有些问题.
It looks ajax4jsf.jar is not compatible with JSF 2. Looks some issue with LifeCycle configuration.
有什么方法可以让 a4j 与 JSF 2 JSP 一起工作?我知道当我们使用 XHTML 时，我们不需要所有这些.
Is there any way we can make a4j work with JSF 2 JSPs? I know when we use XHTML we don't need all this.
推荐答案
彻底摆脱 Ajax4jsf 1.x.它确实与 JSF2 不兼容.相反，JSF2 提供了一个新的主要 ajax 标记 <f:ajax>，它涵盖了以前由 Ajax4jsf 1.x 提供的所有核心功能.
Get rid of Ajax4jsf 1.x altogether. It's indeed not compatible with JSF2. Instead, JSF2 offers a new main ajax tag <f:ajax> which covers all the core functionality as previously offered by Ajax4jsf 1.x.
如果升级到 RichFaces 4 不是一个选项(因为，正如你自己所说，你没有在任何地方使用 RichFaces 组件)，那么只需删除 Ajax4jsf 1.x 并替换所有 由标准 JSF2 等效项标记.
If upgrading to RichFaces 4 is not an option (because, as you said yourself, you aren't using RichFaces components anywhere), then just remove Ajax4jsf 1.x and replace all <a4j:xxx> tags by standard JSF2 equivalents.
:使用.:只需将托管 bean 通过@ViewScoped放入视图范围.:在 JS 上下文中使用jsf.ajax.addOnEvent()或jsf.ajax.addOnError().:将嵌套在中.:使用并记住在中包含它的ID代码> 或 PrimeFaces.:只使用标准的.:只要使用，它就会自动识别.:将嵌套在中.:没有替代品.考虑 OmniFaces或 PrimeFaces.:只要使用，甚至可以包裹> 围绕一组组件.:只使用标准的.:在 JS 上下文中使用jsf.ajax.addOnEvent()或jsf.ajax.addOnError().:只使用标准的.:只使用标准的.:没有替代品.考虑 PrimeFaces.:没有替代品.考虑 OmniFaces或 PrimeFaces.:将嵌套在中.:只使用标准的.:只使用标准的.:只使用标准的.
<a4j:ajaxListener>: use<f:ajax listener>.<a4j:keepAlive>: just put managed bean in the view scope by@ViewScoped.<a4j:log>: usejsf.ajax.addOnEvent()orjsf.ajax.addOnError()in JS context.<a4j:commandLink>: just nest<f:ajax>inside<h:commandLink>.<a4j:outputPanel>: use<h:panelGroup>and remember to include its ID in<f:ajax render>or PrimeFaces<p:outputPanel>.<a4j:repeat>: just use standard<ui:repeat>.<a4j:form>: just use<h:form>, it will autorecognize<f:ajax>.<a4j:htmlCommandLink>: just nest<f:ajax>inside<h:commandLink>.<a4j:jsFunction>: no replacement. Consider OmniFaces<o:commandScript>or PrimeFaces<p:remoteCommand>.<a4j:region>: just use<f:ajax execute>, you can even wrap<f:ajax>around a group of components.<a4j:loadBundle>: just use standard<f:loadBundle>.<a4j:status>: usejsf.ajax.addOnEvent()orjsf.ajax.addOnError()in JS context.<a4j:actionparam>: just use standard<f:param>.<a4j:loadScript>: just use standard<h:outputScript>.<a4j:mediaOutput>: no replacement. Consider PrimeFaces<p:media>.<a4j:poll>: no replacement. Consider OmniFaces<o:commandScript>or PrimeFaces<p:poll>.<a4j:commandButton>: just nest<f:ajax>inside<h:commandButton>.<a4j:include>: just use standard<ui:include>.<a4j:loadStyle>: just use standard<h:outputStylesheet>.<a4j:support>: just use standard<f:ajax>.
您还需要将 JSP 文件重命名/重写为 Facelets 文件.在简单的情况下，这通常只是更改根声明和文件扩展名的问题.Facelets 使用单个模板替换所有重复代码变得更加容易.以下答案适用:
You also need to rename/rewrite JSP files to Facelets files. In simple cases, this is usually just a matter of changing root declarations and file extensions. Facelets makes it easier to replace all duplicated code by a single template. The following answer applies:
这篇关于将带有 Ajax4jsf 1.x 的 JSF 1.1 迁移到 JSF 2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！