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richfaces - "no tag was found"错误

转载 作者：行者123 更新时间：2023-12-04 23:32:12 33 4
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我正在尝试实现一个非常简单的 RichFaces 应用程序(遵循 developer guide 中的示例，但遇到了我无法解决的错误。

我的代码似乎可以正确构建并部署到 Tomcat (localhost)，但是当打开索引页面时出现异常:

javax.faces.view.facelets.TagException: /index.xhtml @13,19 <a4j:form> Tag Library supports namespace: http://richfaces.org/a4j, but no tag was defined for name: form

我试图加载的索引页面如下: 
<?xml version='1.0' encoding='UTF-8' ?>
<!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"
  xmlns:a4j="http://richfaces.org/a4j"
  xmlns:rich="http://richfaces.org/rich"
  xmlns:f="http://java.sun.com/jsf/core">
<h:head>
    <title>Facelet Title</title>
</h:head>
<h:body><f:view>
    <a4j:form>
        <rich:panel header="This is the title" style="width:400px;">
            <h:outputText value="Enter your name:"/>
            <h:inputText value="#{MyBean.message}">
                <f:validateLength minimum="1" maximum="20"/>
            </h:inputText>
        </rich:panel>
    </f:view></a4j:form>
</h:body>
</html>

据我所知，这与开发人员指南中的示例相同。我正在 Netbeans 6.8 中开发，使用 JSF 2.0 的 MyFaces 实现，并添加了 RichFaces 和 Apache Commons jar 作为库，异常声明的标签实际上是 Netbeans 自动建议的!

从 Apache Commons，我补充说:
beanutils，集合，摘要器，日志记录

在 RichFaces 中，我添加了:
Richfaces-api、richfaces-impl、richfaces-impl-jsf2、richfaces-ui

如果提供 bean 代码和/或 web.xml 有用，请说出来，我只是想避免因为可能是一个简单的错误而写一篇大文章。

最佳答案

对于 RichFaces 4.x，请使用“rich:popupPanel”。我从 RichShowCase 得到它:

<a4j:status onstart="#{rich:component('statPane')}.show()"
    onstop="#{rich:component('statPane')}.hide()" />
<h:form id="form">
    <rich:dataTable value="#{carsBean.allInventoryItems}" var="car"
        iterationStatusVar="it" id="table" rows="15">
        <rich:column>
            <f:facet name="header">#</f:facet>
            #{it.index}
        </rich:column>
        <rich:column>
            <f:facet name="header">Vendor</f:facet>
            <h:outputText value="#{car.vendor}" />
        </rich:column>
        <rich:column>
            <f:facet name="header">Model</f:facet>
            <h:outputText value="#{car.model}" />
        </rich:column>
        <rich:column>
            <f:facet name="header">Price</f:facet>
            <h:outputText value="#{car.price}" />
        </rich:column>
        <rich:column>
            <f:facet name="header">Mileage</f:facet>
            <h:outputText value="#{car.mileage}" />
        </rich:column>
        <rich:column>
            <f:facet name="header">VIN</f:facet>
            <h:outputText value="#{car.vin}" />
        </rich:column>
        <rich:column>
            <a4j:commandLink styleClass="no-decor" execute="@this"
                render="@none" oncomplete="#{rich:component('confirmPane')}.show()">
                <h:graphicImage value="/images/icons/delete.gif" alt="delete" />
                <a4j:param value="#{it.index}"
                    assignTo="#{carsBean.currentCarIndex}" />
            </a4j:commandLink>
            <a4j:commandLink styleClass="no-decor" render="editGrid"
                execute="@this" oncomplete="#{rich:component('editPane')}.show()">
                <h:graphicImage value="/images/icons/edit.gif" alt="edit"/>
                <a4j:param value="#{it.index}"
                    assignTo="#{carsBean.currentCarIndex}" />
                <f:setPropertyActionListener target="#{carsBean.editedCar}"
                    value="#{car}" />
            </a4j:commandLink>
        </rich:column>
        <f:facet name="footer">
            <rich:dataScroller page="#{carsBean.page}" />
        </f:facet>
    </rich:dataTable>

    <a4j:jsFunction name="remove" action="#{carsBean.remove}"
        render="table" execute="@this"
        oncomplete="#{rich:component('confirmPane')}.hide();" />

<rich:popupPanel id="statPane" autosized="true">
    <h:graphicImage value="/images/ai.gif" alt="ai" />
    Please wait...
</rich:popupPanel>

<rich:popupPanel id="confirmPane" autosized="true">
    Are you sure you want to delete the row?
    <a4j:commandButton value="Cancel"
        onclick="#{rich:component('confirmPane')}.hide(); return false;" />
    <a4j:commandButton value="Delete" onclick="remove(); return false;" />
</rich:popupPanel>

<rich:popupPanel header="Edit Car Details" id="editPane" domElementAttachment="parent" width="400" height="170">
        <h:panelGrid columns="3" id="editGrid">
            <h:outputText value="Vendor" />
            <h:outputText value="#{carsBean.editedCar.vendor}" />
            <h:panelGroup />
            <h:outputText value="Model" />
            <h:outputText value="#{carsBean.editedCar.model}" />
            <h:panelGroup />
            <h:outputText value="Price" />
            <h:inputText value="#{carsBean.editedCar.price}" required="true"
                requiredMessage="Price is required" id="price"
                converterMessage="Should be a valid price"
                validatorMessage="Should be a valid price" label="Price field">
                <f:validateDoubleRange/>
            </h:inputText>
            <rich:message id="priceMsg" for="price" />
            <h:outputText value="Mileage" />
            <h:inputText value="#{carsBean.editedCar.mileage}" id="mage"
                converterMessage="Should be a valid mileage"
                validatorMessage="Should be a valid mileage" label="Mileage field" >
                <f:validateDoubleRange/>
            </h:inputText>
            <rich:message id="madeMsg" for="mage" />
            <h:outputText value="VIN" />
            <h:inputText value="#{carsBean.editedCar.vin}" id="vin"
                required="true" validatorMessage="Not a valid 17-digit VIN"
                converterMessage="Not a valid 17-digit VIN"
                requiredMessage="VIN is required">
                <f:validateLength minimum="17" maximum="17" />
            </h:inputText>
            <rich:message id="vinMsg" for="vin" />
        </h:panelGrid>
        <a4j:commandButton value="Store" action="#{carsBean.store}"
            render="table" execute="editPane"
            oncomplete="if (#{facesContext.maximumSeverity==null}) {#{rich:component('editPane')}.hide();}" />
        <a4j:commandButton value="Cancel"
            onclick="#{rich:component('editPane')}.hide(); return false;" />
</rich:popupPanel>
</h:form>

关于richfaces - "no tag was found"错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3451825/

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