在JSF2项目中混合使用JSP和XHTML(Facelets) - 可能吗?

时间:2010-10-14 18:00:45

标签: jsp jsf jsf-2 facelets

我有一个想要使用JSF2的客户,他们喜欢XHTML现在是默认的(Facelets)。

但是,他们的JSF1.x代码库中有大量的“遗留”JSP。

我知道这可能不太可取,但是有可能在JSF2中支持两者的混合,至少在他们移植的过渡期间吗?

我知道可以在JSF1.x中混合使用两者,但我在JSF2中找不到任何关于此的信息。

我用Google搜索过,但自然所有JSF2都集中在Facelets上。此外,我对混音的简短尝试(我不是JSF的专家!)导致了失败。

3 个答案:

答案 0 :(得分:12)

FacesServlet上的Facelets FAQ:使用前缀映射中对此进行了解答。然后,您可以按http://example.com/faces/page.jsp访问JSP页面,按http://example.com/faces/page.xhtml访问Facelets页面。这是一个相关的引用:

  

How do I use Facelets and JSP in the same application?

     

您必须为Facelets页面使用前缀映射才能使其正常工作。保留DEFAULT_SUFFIX,其JSF默认值为.jsp。配置Facelet的VIEW_MAPPINGS参数:

<web-app>
    <context-param>
        <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
        <param-value>.jsp</param-value>
    </context-param>

    <!-- Facelets pages will use the .xhtml extension -->
    <context-param>
        <param-name>facelets.VIEW_MAPPINGS</param-name>
        <param-value>*.xhtml</param-value>
    </context-param>     

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    </servlet>

    <!-- Use prefix mapping for Facelets pages, e.g. http://localhost:8080/webapp/faces/mypage.xhtml -->
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>/faces/*</url-pattern>
    </servlet-mapping>
</web-app>

答案 1 :(得分:3)

BalusC引用的wiki部分似乎确实已经过时了。在我的扩展映射(* .faces)设置中,我遇到问题,建议javax.faces.DEFAULT_SUFFIX设置为.jsp,在* .xhtml页面的表单标记内生成操作URL,而不是a。扩展名.jsp。面部扩展(因此无法映射)。

在我进入Apache MyFaces 2.x实现的相应类之后(参见 org.apache.myfaces.shared.application.DefaultViewHandlerSupport.calculateActionURL(FacesContext context,String viewId))以下内容安装结果在我们并行使用JSP和Facelets视图处理方面起作用。

如何在同一个应用程序中使用Facelets和JSP?

除了前缀映射之外,您还可以使用Facelets页面的扩展映射(例如* .faces)来实现此功能。保留DEFAULT_SUFFIX,JSF默认值为.jsp .xhtml。配置Facelet的VIEW_MAPPINGS参数:

<web-app>
    <context-param>
        <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
        <param-value>.jsp .xhtml</param-value>
    </context-param>

    <!-- Facelets pages will use the .xhtml extension -->
    <context-param>
        <param-name>javax.faces.FACELETS_VIEW_MAPPINGS</param-name>
        <param-value>*.xhtml</param-value>
    </context-param>     

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    </servlet>

    <!-- use extension mapping in this sample -->
    <servlet-mapping>
            <servlet-name>Faces Servlet</servlet-name>
            <url-pattern>*.faces</url-pattern>
    </servlet-mapping>
</web-app>

对于那些对org.apache.myfaces.shared.application.DefaultViewHandlerSupport.calculateActionURL(FacesContext context,String viewId)中的动作网址处理细节感兴趣的人:

        if ( mapping.isExtensionMapping() ) {
            // See JSF 2.0 section 7.5.2
            String[] contextSuffixes = _initialized ? _contextSuffixes : getContextSuffix( context );
            boolean founded = false;
            for ( String contextSuffix : contextSuffixes ) {
                if ( viewId.endsWith( contextSuffix ) ) {
                    builder.append( viewId.substring( 0, viewId.indexOf( contextSuffix ) ) );
                    builder.append( mapping.getExtension() );
                    founded = true;
                    break;
                }
            }
            if ( !founded ) {
                // See JSF 2.0 section 7.5.2
                // - If the argument viewId has an extension, and this extension is mapping,
                // the result is contextPath + viewId
                //
                // -= Leonardo Uribe =- It is evident that when the page is generated, the
                // derived
                // viewId will end with the
                // right contextSuffix, and a navigation entry on faces-config.xml should use
                // such id,
                // this is just a workaroud
                // for usability. There is a potential risk that change the mapping in a webapp
                // make
                // the same application fail,
                // so use viewIds ending with mapping extensions is not a good practice.
                if ( viewId.endsWith( mapping.getExtension() ) ) {
                    builder.append( viewId );
                } else if ( viewId.lastIndexOf( "." ) != -1 ) {
                    builder.append( viewId.substring( 0, viewId.lastIndexOf( "." ) ) );
                    builder.append( contextSuffixes[0] );
                } else {
                    builder.append( viewId );
                    builder.append( contextSuffixes[0] );
                }
            }
        } else {
            builder.append( mapping.getPrefix() );
            builder.append( viewId );
        }

答案 2 :(得分:1)

上述建议对我来说根本不起作用。维基页面可能已过期。从JSF2规范我得到了以下参数:

  <!-- Facelets pages will use the .xhtml extension -->
  <context-param>
    <param-name>javax.faces.FACELETS_VIEW_MAPPINGS</param-name>
    <param-value>*.xhtml</param-value>
  </context-param> 

而不是:

<context-param>
    <param-name>facelets.VIEW_MAPPINGS</param-name>
    <param-value>*.xhtml</param-value>
</context-param>