PrimeFaces 组件不显示，而标准 JSF 组件呈现良好 [英] PrimeFaces components don't display while standard JSF components render fine

问题描述

Java EE6/CDI JSF2 Primefaces 3.3.1.我创建了一个带有几个级联下拉列表的搜索页面，用于生成搜索结果表 如果我使用 jsf:

Java EE6/CDI JSF2 Primefaces 3.3.1. I created a search page with a few cascading dropdowns that are used to generate a table of search results If I use jsf:

<h:dataTable  var="_employeeVList" value="#{employeeVProducer.employeeVList}"  rendered="#{not empty employeeVProducer.employeeVList}"> 
    <f:facet name="header">  
        Employee Search Results 
    </f:facet>
    <h:column>
        <f:facet name="header">Area</f:facet>
        <h:outputText value="#{_employeeVList.areaName}" />
    </h:column>
    ...
</h:dataTable>

表格呈现输出，html看起来正常.但是当我换成素面时:

The table renders with output, html looks normal. But when I change to primefaces:

<p:dataTable  var="_employeeVList" value="#{employeeVProducer.employeeVList}"  rendered="#{not empty employeeVProducer.employeeVList}"> 
    <f:facet name="header">  
        Employee Search Results 
    </f:facet>
    <p:column>
        <f:facet name="header">Area</f:facet>
        <h:outputText value="#{_employeeVList.areaName}" />
    </p:column>
    ...
</p:dataTable>

表格不显示.当我用 firebug 查看源代码时，我发现 html 有点奇怪:

The table doesn't display. When I look at the source with firebug I see some weirdness with the html:

    <table id="searchForm:results">
    <tbody>
    <tr>
    <td>
    <p:datatable rendered="true" value="[com.raytheon.myPkg.EmployeeV@f486,                                 com.raytheon.myPkg.EmployeeV@88fe,                              com.raytheon.myPkg.EmployeeV@adaf, 
                                          ...
                                com.raytheon.myPkg.EmployeeV@6a5b]" 
var="_employeeVList">
    <p:column></p:column>
    <p:column></p:column>
    ...                          
    </p:datatable></td>
    </tr>
    </tbody>
    </table>

对象在标签标签中，列是空的.在页面的其他地方，我正在使用 p:panelGrid，它包含下拉列表并且显示正确.

The objects are in the tag label, the columns are empty. Elsewhere in the page I'm using p:panelGrid, that contains the dropdowns and that displays correctly.

我的默认模板页面中有 h:head 和 h:body.

I have h:head and h:body in my default template page.

该表由有状态请求范围的 bean 支持.

The table is backed by a stateful request scoped bean.

我没有使用任何外部 JavaScript.

I'm not using any external JavaScript.

我做错了什么?

推荐答案

因此， 标签根本没有被解析为 JSF 标签，并且在生成的HTML 输出.这可能有以下一个或多个原因:

Thus, the <p:xxx> tags are not been parsed as JSF tags at all and appear plain vanilla in the generated HTML output. That can have one or more of the following reasons:

1. 您忘记在视图中声明 p: XML 命名空间，或者您使用了错误的命名空间 URI.应该是:

1. You forgot to declare the p: XML namespace in the view, or you used the wrong namespace URI. It should be:

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

您忘记实际安装 PrimeFaces 库.这应该是一个问题

You forgot to actually install the PrimeFaces library. It should be a matter of either

一个.将 primefaces.jar 放到 webapp 的 /WEB-INF/lib 文件夹中.

a. Dropping primefaces.jar in webapp's /WEB-INF/lib folder.

B.确保您的依赖项管理器(例如 Maven)已配置为将 PrimeFaces 添加到项目并将其添加到运行时 /WEB-INF/lib 文件夹

b. Making sure your dependency manager (e.g. Maven) has been configured to add PrimeFaces to the project and added it to the runtime /WEB-INF/lib folder

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