jsf - 警告 : This page calls for XML namespace declared with prefix [tagname] but no taglibrary exists for that namespace

Question

我已经声明了 Facelet View 模板如下:

<ui:composition template="./templates/master.xhtml"
  xmlns:f="http://java.sun.com/jsf/core"
  xmlns:h="http://java.sun.com/jsf/html"
  xmlns:ui="http://java.sun.com/jsf/facelets"
  xmlns:p="http://primefaces.prime.com.tr/ui">

  <ui:define name="content">
    <h:panelGroup rendered="#{!current.hasLoggedIn()}">      
      <h:panelGroup layout="block" styleClass="warningBox">
        <h:outputText value="#{app.youHaveNotLoggedIn}"/>
        <br/>
        <h:link value="#{lbls.login}" outcome="login"/>
      </h:panelGroup>      
    </h:panelGroup>

    <h:panelGroup rendered="#{current.hasLoggedIn()}">
      <p:panel>
        <f:facet name="header">
          <h:outputText value="#{lbls.requestWaggon}" />
        </f:facet>

        <h:form id="frmRequest">
          <h:panelGrid columns="3" footerClass="buttons">
            <h:outputText value="#{lbls.number}:"/>
            <h:inputText id="number" label="#{lbls.number}" styleClass="ltr" value="#{requestWaggon.request.number}" readonly="true" />
            <h:message for="number" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.requestDate}:"/>
            <h:panelGroup>
              <h:inputText styleClass="date ltr" id="date" label="#{lbls.requestDate}" value="#{requestWaggon.request.date}" required="true">
                <f:converter converterId="ir.khorasancustoms.DateConverter"/>
              </h:inputText>
              <input type="button" value="..." onclick="displayDatePicker('frmRequest:date', this);" class="datePicker"/>
            </h:panelGroup>
            <h:message for="date" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.nameOfMaterialOwner}:"/>
            <h:inputText id="ownerName" label="#{lbls.nameOfMaterialOwner}" value="#{requestWaggon.request.fullName}" required="true"/>
            <h:message for="ownerName" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.companyName}:"/>
            <h:inputText id="companyName" label="#{lbls.companyName}" value="#{requestWaggon.request.companyName}" required="true"/>
            <h:message for="companyName" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.nameOfMaterial}:"/>
            <h:inputText id="nameOfMaterial" label="#{lbls.nameOfMaterial}" value="#{requestWaggon.request.materialName}" required="true"/>
            <h:message for="nameOfMaterial" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>                        

            <h:outputText value="#{lbls.materialWeight}:"/>
            <h:panelGroup>
              <h:inputText id="materialWeight" styleClass="ltr" label="#{lbls.materialWeight}" value="#{requestWaggon.request.materialWeight}" required="true" style="min-width: 0px; width: 60px"/>
              <h:selectOneMenu id="weightUnit" label="#{lbl.weightUnit}" value="#{requestWaggon.request.weightUnit}" required="true" style="min-width: 0px; width: 90px">
                <f:selectItems value="#{requestWaggon.weightUnits}"/>
                <f:converter converterId="ir.khorasancustoms.CatalogValueConverter"/>
              </h:selectOneMenu>
            </h:panelGroup>
            <h:message for="materialWeight" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.senderAddress}:"/>
            <h:inputText id="senderAddress" label="#{lbls.senderAddress}" value="#{requestWaggon.request.address}" required="true" style="width: 350px;"/>
            <h:message for="senderAddress" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.receiverAddress} (#{lbls.country}):"/>            
            <h:selectOneMenu id="country" label="#{lbl.receiverAddress}" value="#{requestWaggon.request.country}" required="true">
              <f:selectItem/>
              <f:selectItems value="#{requestWaggon.countries}"/>
              <f:converter converterId="ir.khorasancustoms.CatalogValueConverter"/>
            </h:selectOneMenu>            
            <h:message for="country" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.station}:"/>
            <h:inputText id="station" styleClass="ltr" label="#{lbls.station}" value="#{requestWaggon.request.station}" required="true" />
            <h:message for="station" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.loadingDate}:"/>
            <h:panelGroup>
              <h:inputText styleClass="date ltr" id="loadingDate" label="#{lbls.loadingDate}" value="#{requestWaggon.request.loadingDate}" required="true">
                <f:converter converterId="ir.khorasancustoms.DateConverter"/>
              </h:inputText>
              <input type="button" value="..." onclick="displayDatePicker('frmRequest:loadingDate', this);" class="datePicker"/>
            </h:panelGroup>
            <h:message for="loadingDate" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <h:outputText value="#{lbls.boundryStation}:"/>            
            <h:selectOneMenu id="boundryStation" label="#{lbl.boundryStation}" value="#{requestWaggon.request.bountryStation}" required="true">
              <f:selectItem/>
              <f:selectItems value="#{requestWaggon.boundryStations}"/>
              <f:converter converterId="ir.khorasancustoms.CatalogValueConverter"/>
            </h:selectOneMenu>            
            <h:message for="boundryStation" infoClass="info" warnClass="warning" errorClass="error" fatalClass="fatal"/>

            <f:facet name="footer">
              <h:commandButton action="#{requestWaggon.save}" value="#{lbls.ok}"/>
            </f:facet>
          </h:panelGrid>
          <h:outputScript>
            focusElement('frmRequest:ownerName');            
          </h:outputScript>
        </h:form>

        <f:facet name="footer">
          <h:messages styleClass="boxMessages" layout="table" infoClass="infoBox" warnClass="warningBox" errorClass="errorBox" fatalClass="errorBox" globalOnly="true"/>
        </f:facet>
      </p:panel>
    </h:panelGroup>
  </ui:define>
</ui:composition>

这显示了以下警告消息中的 3 条:

Warning: This page calls for XML namespace declared with prefix input but no taglibrary exists for that namespace.

当我删除 <p:panel>标记，则这些消息不会出现。这是怎么引起的，我该如何解决？

Answer 1

您已声明纯 HTML <input>元素和 XML 解析器不知何故未配置为使用 http://www.w3.org/1999/xhtml作为全局 XML 命名空间。自己添加。

<ui:composition xmlns="http://www.w3.org/1999/xhtml">

更新 (10 年后):这种警告在 JSF 和 Facelets 的上下文中毕竟是完全错误的，其中 [somehtmltag]是一个普通的 HTML 标签名称，例如 html , style , div , p ， 等等。

Warning: This page calls for XML namespace declared with prefix [somehtmltag] but no taglibrary exists for that namespace.

这是由 Mojarra 的代码实现中的错误引起的，该代码负责根据 XML 文档中的标签构建组件树。最初的想法是警告开发人员任何未注册的命名空间标签，例如 <x:foo>没有 xmlns:x="..." .然后它会被呈现为“普通的 Vanilla ”，而不是被解析为一个真正的组件。然而，负责此警告的代码无意中也匹配了无命名空间的标签，例如纯 HTML。
它还导致了错误的含义，即在 Facelets 中需要声明默认的 XML namespace ，而它在技术上实际上是可选的。它最多只对工具有用，例如当 IDE 本身不够智能以根据文件扩展名暗示它们时，IDE 能够自动完成纯 HTML 元素。
根据 issue 4872它已在 Mojarra 中修复。 http://www.w3.org/1999/xhtml 的默认 XML 命名空间是 可选 在 Facelets 中。您可以安全地从 XHTML 文件中省略它以保持代码精简。