Question

我正在将代码从JSF 1.2迁移到JSF 2.0（部署在JBoss 6.1上）。但是，我在h:outputText标记的href属性中使用link时遇到问题：

<link rel='canonical' href='<h:outputText value="#{resultPage.currentLink}" escape="false"/>' />

我不能只使用

<link rel='canonical' href="#{resultPage.currentLink}" />

因为我需要html转义属性。

我收到以下例外：

javax.servlet.ServletException: Error Parsing /shoe/shoe2.xhtml: Error Traced[line: 23] The value of attribute "href" associated with an element type "link" must not contain the '<' character.
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:321)
    com.youandshoe.web.controller.EncoderFilter.doFilter(EncoderFilter.java:28)
    com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:126)
    com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118)

root cause

javax.faces.view.facelets.FaceletException: Error Parsing /shoe/shoe2.xhtml: Error Traced[line: 23] The value of attribute "href" associated with an element type "link" must not contain the '<' character.
    com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:390)
    com.sun.faces.facelets.compiler.SAXCompiler.doMetadataCompile(SAXCompiler.java:373)
    com.sun.faces.facelets.compiler.Compiler.metadataCompile(Compiler.java:128)
    com.sun.faces.facelets.impl.DefaultFaceletFactory.createMetadataFacelet(DefaultFaceletFactory.java:316)
    com.sun.faces.facelets.impl.DefaultFaceletFactory.access$200(DefaultFaceletFactory.java:89)
    com.sun.faces.facelets.impl.DefaultFaceletFactory$2.newInstance(DefaultFaceletFactory.java:165)
    com.sun.faces.facelets.impl.DefaultFaceletFactory$2.newInstance(DefaultFaceletFactory.java:164)
    com.sun.faces.facelets.impl.DefaultFaceletCache$2.newInstance(DefaultFaceletCache.java:90)
    com.sun.faces.facelets.impl.DefaultFaceletCache$2.newInstance(DefaultFaceletCache.java:86)
    com.sun.faces.util.ExpiringConcurrentCache$1.call(ExpiringConcurrentCache.java:95)
    java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    java.util.concurrent.FutureTask.run(Unknown Source)
    com.sun.faces.util.ExpiringConcurrentCache.get(ExpiringConcurrentCache.java:110)
    com.sun.faces.facelets.impl.DefaultFaceletCache.getMetadataFacelet(DefaultFaceletCache.java:131)
    com.sun.faces.facelets.impl.DefaultFaceletCache.getMetadataFacelet(DefaultFaceletCache.java:58)
    com.sun.faces.facelets.impl.DefaultFaceletFactory.getMetadataFacelet(DefaultFaceletFactory.java:249)
    com.sun.faces.facelets.impl.DefaultFaceletFactory.getMetadataFacelet(DefaultFaceletFactory.java:198)
    com.sun.faces.application.view.ViewMetadataImpl.createMetadataView(ViewMetadataImpl.java:102)
    com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:223)
    com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
    com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:107)
    com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114)
    org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:97)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:308)
    com.youandshoe.web.controller.EncoderFilter.doFilter(EncoderFilter.java:28)
    com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:126)
    com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118)

但是，相同的代码在JSF 1.2，JBoss 5.1中运行良好。

有什么想法吗？感谢名单！

Answer 1

Facelets是一种基于XML的视图技术。 XML文档必须格式正确。嵌套XML标记无效。要解决您的问题，您需要将整个HTML包含在<h:outputText>内。

<h:outputText value="&lt;link rel=&quot;canonical&quot; href=&quot;#{resultPage.currentLink}&quot; /&gt;" escape="false" />

顺便说一句，我真的很想知道为什么你不能只使用

<link rel="canonical" href="#{resultPage.currentLink}" />

这应该同样合适。在href属性中使用XML特殊字符否则会导致浏览器端无效的XML标记错误，并且浏览器将无法下载资源。

h：href中的outputText在JSF 2.0中不起作用

1 个答案: