我正在尝试测试f:selectedOneMenue标记的工作情况，但是当在服务器上运行代码时，我收到了错误。
我只想将ContactBeanTwo中food arrayList的内容显示为选择按钮，以便用户可以选择某些项目。因此，该项目将显示在下面的消息区域中。
如何管理它？
我感谢任何帮助。
错误
2016-07-09T17:57:15.656+0200|Warnung: StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception
javax.faces.view.facelets.TagException: /index49_select_tags.xhtml @19,58 <f:selectedOneMenue> Tag Library supports namespace: http://xmlns.jcp.org/jsf/core, but no tag was defined for name: selectedOneMenue
at com.sun.faces.facelets.compiler.CompilationManager.pushTag(CompilationManager.java:311)
at com.sun.faces.facelets.compiler.SAXCompiler$CompilationHandler.startElement(SAXCompiler.java:266)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:745)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:327)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:454)
at com.sun.faces.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:430)
at com.sun.faces.facelets.compiler.Compiler.compile(Compiler.java:124)
at com.sun.faces.facelets.impl.DefaultFaceletFactory.createFacelet(DefaultFaceletFactory.java:481)
at com.sun.faces.facelets.impl.DefaultFaceletFactory.access$100(DefaultFaceletFactory.java:106)
at com.sun.faces.facelets.impl.DefaultFaceletFactory$1.newInstance(DefaultFaceletFactory.java:199)
at com.sun.faces.facelets.impl.DefaultFaceletFactory$1.newInstance(DefaultFaceletFactory.java:197)
at com.sun.faces.facelets.impl.DefaultFaceletCache$1.newInstance(DefaultFaceletCache.java:86)
at com.sun.faces.facelets.impl.DefaultFaceletCache$1.newInstance(DefaultFaceletCache.java:81)
at com.sun.faces.util.ExpiringConcurrentCache$1.call(ExpiringConcurrentCache.java:99)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.sun.faces.util.ExpiringConcurrentCache.get(ExpiringConcurrentCache.java:114)
at com.sun.faces.facelets.impl.DefaultFaceletCache.getFacelet(DefaultFaceletCache.java:124)
at com.sun.faces.facelets.impl.DefaultFaceletCache.getFacelet(DefaultFaceletCache.java:63)
at com.sun.faces.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:295)
at com.sun.faces.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:239)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.buildView(FaceletViewHandlingStrategy.java:1000)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:99)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:416)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:283)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
at java.lang.Thread.run(Thread.java:745)
idex.xhtml
<!DOCTYPE html>
<html xmlns="htpp://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://xmlns.jcp.org/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<ui:composition template="/WEB-INF/templates/template.xhtml">
<ui:define name="css">
<h:outputStylesheet library="css" name="mainStlye.css" />
</ui:define>
<!-- to override the content of the content div -->
<ui:define name="content">
<h:form id="login-form" prependId="false">
<f:selectedOneMenue value="#{contactBeanTwo.favfood}">
<f:selectItems value="#{contactBeanTwo.food}"/>
</f:selectedOneMenue>
<h:commandButton value="Submit" actionListener="#{contactBeanTwo.selectedOneMenuMethod()}"/>
</h:form>
<h1>
<h:outputLabel value="#{contactBeanTwo.foodMsg}" rendered="#{not empty contactBeanTwo.foodMsg}" />
</h1>
</ui:define>
</ui:composition>
</html>
ContenBeanTow
package com.beans;
import java.util.Arrays;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.enterprise.context.RequestScoped;
import javax.inject.Named;
@Named("contactBeanTwo")
@RequestScoped
public class ContactBeanTwo {
private String foodMsg;
private String favfood;
private List<String> food;
@PostConstruct
public void init() {
food = Arrays.asList("Hot Dogs", "Hamburgers", "Pizza");
}
public String getFoodMsg() {
return foodMsg;
}
public void setFoodMsg(String foodMsg) {
this.foodMsg = foodMsg;
}
public String getFavfood() {
return favfood;
}
public void setFavfood(String favfood) {
this.favfood = favfood;
}
public List<String> getFood() {
return food;
}
public void setFood(List<String> food) {
this.food = food;
}
public void selectedOneMenuMethod() {
switch (favfood) {
case "Piza":
foodMsg = "Love Pizza!";
break;
case "Hot Dogs":
foodMsg = "Love hot dogs!";
break;
case "Hamburgers":
foodMsg = "Love Hamburgers!";
break;
}
}
}