p:feedReader noclassdeffound异常

时间:2018-05-05 18:42:28

标签: primefaces rome

我正在尝试在JSF Web项目(Eclipse)中创建一个简单的RSS阅读器。

这是RSS的Primefaces片段:

    <h:panelGrid>
    <br/>
<h:outputText styleClass="font1" value="Travel feeds:"/>
<hr/>
<p:feedReader value="http://www.faroo.com/api?q=travel&amp;l=en&amp;src=news&amp;f=rss" var="feed">
    <a href="#{feed.link}" class="link">#{feed.title}</a>
    <h:outputText value="#{feed.description.value}" escape="false"/>
    <p:separator />
</p:feedReader>
</h:panelGrid>

我把它包含在同一页面中:

xmlns:p="http://primefaces.org/ui"

我使用“配置构建路径”包含的库如下:

primefaces-6.2-sources.jar,primefaces-6.2.jar,rome-1.0.jar

还尝试将它们直接复制到WEB-INF / libfolder,这也没有帮助。

那么实际问题是什么?

我有这样的例外:

    exception 
javax.servlet.ServletException: com/rometools/rome/io/XmlReader
    javax.faces.webapp.FacesServlet.service(Unknown Source)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)



root cause 
java.lang.NoClassDefFoundError: com/rometools/rome/io/XmlReader
    org.primefaces.component.feedreader.FeedReaderRenderer.encodeEnd(FeedReaderRenderer.java:35)
    javax.faces.component.UIComponentBase.encodeEnd(Unknown Source)
    com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(Unknown Source)
    com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(Unknown Source)
    com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(Unknown Source)
    javax.faces.component.UIComponentBase.encodeChildren(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(Unknown Source)
    com.sun.faces.application.view.MultiViewHandler.renderView(Unknown Source)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(Unknown Source)
    com.sun.faces.lifecycle.Phase.doPhase(Unknown Source)
    com.sun.faces.lifecycle.LifecycleImpl.render(Unknown Source)
    javax.faces.webapp.FacesServlet.service(Unknown Source)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)



root cause 
java.lang.ClassNotFoundException: com.rometools.rome.io.XmlReader
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1856)
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1705)
    org.primefaces.component.feedreader.FeedReaderRenderer.encodeEnd(FeedReaderRenderer.java:35)
    javax.faces.component.UIComponentBase.encodeEnd(Unknown Source)
    com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(Unknown Source)
    com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(Unknown Source)
    com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(Unknown Source)
    javax.faces.component.UIComponentBase.encodeChildren(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    javax.faces.component.UIComponent.encodeAll(Unknown Source)
    com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(Unknown Source)
    com.sun.faces.application.view.MultiViewHandler.renderView(Unknown Source)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(Unknown Source)
    com.sun.faces.lifecycle.Phase.doPhase(Unknown Source)
    com.sun.faces.lifecycle.LifecycleImpl.render(Unknown Source)
    javax.faces.webapp.FacesServlet.service(Unknown Source)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)



note The full stack trace of the root cause is available in the Apache Tomcat/7.0.67 logs.

真的找不到解决方案。我错过了什么?我没有包含所需的.jar文件,或者我用错误的方式包含它们?

2 个答案:

答案 0 :(得分:1)

PrimeFaces issuelist中提到的PrimeFaces 6.2问题的解决方案

在PrimeFaces文档中:

  • 罗马1.5.0可选FeedReader

在迁移信息中:

你需要更新版本的罗马, 1.5.0 而不是1.0!

答案 1 :(得分:-1)

将Primefaces降级到5.3版本(从6. *开始)并包括jdom-1.1.1.jar库似乎已经解决了这个问题。 Primefaces RSS阅读器现在正在运行。不能说它是Primefaces版本问题,还是jdom依赖,或两者兼而有之。希望这至少可以为可能提出相同问题的人提供线索。

谢谢你的帮助,伙计们!