这是Facelet:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns ="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<title>Title</title>
</h:head>
<h:body>
<h:form>
<h:commandButton value ="Converter" action ="#{conversorMonetarioBean.converte}"/>
<h:inputText value ="#{conversorMonetarioBean.valor}"/>
<h:outputLabel value ="de" for ="de"/>
<h:selectOneMenu value ="#{conversorMonetarioBean.de}" id="de">
<f:selectItems
value ="#{conversorMonetarioBean.taxas.keySet()}"
var ="moeda"
itemValue ="#{moeda}"
itemLabel ="#{moeda}" />
</h:selectOneMenu>
<h:outputLabel value ="para" for ="para"/>
<h:selectOneMenu value ="#{conversorMonetarioBean.para}" id="para">
<f:selectItems
value ="#{conversorMonetarioBean.taxas.keySet()}"
var ="moeda"
itemValue ="#{moeda}"
itemLabel ="#{moeda}" />
</h:selectOneMenu>
</h:form>
<h:outputFormat value ="{0} em {1} equivale a {2} em {3}" rendered ="#{conversorMonetarioBean.resultado != null}">
<f:param value ="#{conversorMonetarioBean.valor}"/>
<f:param value ="#{conversorMonetarioBean.de}"/>
<f:param value ="#{conversorMonetarioBean.resultado}"/>
<f:param value ="#{conversorMonetarioBean.para}"/>
</h:outputFormat>
</h:body>
</html>
据说f:selectItems是一个未知标记。
有什么问题吗？我正在使用JSF2，GlassFish 3.1.2，Eclipse。我试图按Ctrl +空格键，但只有h:something标签。
最佳答案
您忘记了在f声明html中导入xmlns:f="http://java.sun.com/jsf/core"命名空间，因此顶部如下所示:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
另外，您的IDE可能会向您显示
f命名空间丢失的提示，因此按照其指示进行导入将解决您的问题。关于jsf-2 - 未知标记.xhtml jsf <f:selectItems/>，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/16502982/