javax.faces.view.facelets.FaceletException:错误解析/my.xhtml:错误跟踪[行:42]前缀"f"表示错误.对于元素"f:facet"没有约束 [英] javax.faces.view.facelets.FaceletException: Error Parsing /my.xhtml: Error Traced[line: 42] The prefix "f" for element "f:facet" is not bound
问题描述
我想创建一个表，该表可以将数据库中的数据显示到JSF页面中.我找到了以下代码:
I would like to create table which can display data from database into JSF page. I found this code:
<h:dataTable value="#{bookStore.items}" var="store">
<h:column>
<f:facet name="header">
<h:outputText value="#{msg.storeNameLabel}"/>
</f:facet>
<h:outputText value="#{store.name}"/>
</h:column>
<h:column>
<f:facet name="header">
Subject
</f:facet>
<h:outputText value="#{store.subject}"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{msg.storePriceLabel}"/>
</f:facet>
<h:outputText value="#{store.price}"/>
</h:column>
</h:dataTable>
使用此代码时，我在Netbeans中收到以下错误消息:
When I use this code I get this error message in Netbeans:
javax.faces.view.facelets.FaceletException:错误解析/my.xhtml:错误跟踪[行:42]元素"f:facet"的前缀"f"未绑定
javax.faces.view.facelets.FaceletException: Error Parsing /my.xhtml: Error Traced[line: 42] The prefix "f" for element "f:facet" is not bound
如果我将f标记替换为h标记，它将起作用吗?还是我必须包含f标记库?
If I replace the f tag with h tag, is it going to work? Or do I have to include f tag library?
推荐答案
您必须为f前缀包含正确的taglib.
You have to inlude the correct taglib for the f prefix.
以下是JSF 2.2 Facelet页面的示例:
Here is an example for a JSF 2.2 Facelet page:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core">
...
</html>
如果您仍在使用JSF 2.0/2.1，请在XML名称空间中使用java.sun.com域而不是xmlns.jcp.org域.
In case you're still on JSF 2.0/2.1, use java.sun.com domain instead of xmlns.jcp.org domain in XML namespace.
我建议阅读JSF教程，您可以在我们的JSF Wiki页面中找到链接.
I recommend to read a JSF tutorial, you can find links in our JSF wiki page.
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