当我在 GL-Server (4.1) 上部署我的 JSF 项目时，总是会收到以下消息：警告：此页面调用 XML 命名空间http://primefaces.org/ui声明为前缀 p 但该命名空间不存在标记库
http://s29.postimg.org/km7nd8b47/primefaces.png
我几乎尝试了一切：创建一个新项目，删除 GL-Server，重新安装 Maven，用 eclipse 清理项目等等。
我相信我的项目中一定存在配置错误。一开始一切正常，但后来发生了这个错误。我可以通过创建一个新项目来解决它一段时间，但错误又来了（是因为我在项目方面选择了 JPA 还是其他什么？）
这是我的 pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.saphirwerk</groupId>
<artifactId>configurator</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>configurator</name>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.6</version>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>2.3.2</version>
</dependency>
</dependencies>
<build>
<finalName>configurator</finalName>
</build>
</project>
我的首页：
<ui:composition template="/template.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<ui:define name="header">
<h1>#{texts.titleIndex}</h1>
</ui:define>
<ui:define name="content">
<h:panelGrid styleClass="selectionHome" columns="2">
<h:panelGrid styleClass="selectionHome" columns="2">
<p:link outcome="searchStd">
<p:graphicImage name="images/feeler/Taster-sketch-1_Ohne.png"
width="400" height="180" title="#{texts.buttonStd}" />
</p:link>
<p:link outcome="searchStd2">
<p:graphicImage name="images/feeler/Taster-sketch-2_Ohne.png"
width="400" height="180" />
</p:link>
<p:outputLabel value="#{texts.buttonStd}" />
<p:outputLabel value="#{texts.buttonStd2}" />
<p:link outcome="searchPin">
<p:graphicImage name="images/feeler/Taster-sketch-4_Ohne.png"
width="400" height="180" />
</p:link>
<p:link outcome="searchPin2">
<p:graphicImage name="images/feeler/Taster-sketch-5_Ohne.png"
width="400" height="180" />
</p:link>
<p:outputLabel value="#{texts.buttonPin}" />
<p:outputLabel value="#{texts.buttonPin2}" />
<p:link outcome="searchZylinder">
<p:graphicImage name="images/feeler/Taster-sketch-6_Ohne.png"
width="400" height="180" />
</p:link>
<p:link outcome="searchPlate">
<p:graphicImage name="images/feeler/Taster-sketch-7_Ohne.png"
width="400" height="180" />
</p:link>
<p:outputLabel value="#{texts.buttonPin}" />
<p:outputLabel value="#{texts.buttonPlate}" />
<p:link outcome="searchHollow">
<p:graphicImage name="images/feeler/Taster-sketch-8_Ohne.png"
width="400" height="180" />
</p:link>
<p:link outcome="searchStar">
<p:graphicImage name="images/feeler/Taster-sketch-9_Ohne.png"
width="400" height="180" title="#{texts.buttonStar}" />
</p:link>
<p:outputLabel value="#{texts.buttonHollow}" />
<p:outputLabel value="#{texts.buttonStar}" />
</h:panelGrid>
</h:panelGrid>
</ui:define>
</ui:composition>
模板
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>SAPHIRWERK AG</title>
<h:outputStylesheet name="/style.css" />
</h:head>
<h:body>
<div id="container">
<div id="center">
<ui:insert name="center">
<div id="header">
<ui:insert name="header"></ui:insert>
</div>
<div id="menu">
<ui:insert name="menu">
<ui:include src="/menu.xhtml" />
</ui:insert>
</div>
<div id="content">
<ui:insert name="content"/>
</div>
</ui:insert>
</div>
<div id="left">
<ui:insert name="left"/>
</div>
<div id="right">
<ui:insert name="right"/>
</div>
</div>
</h:body>
</html>
至少 web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>Konfigurator Saphirwerk AG</display-name>
<servlet>
<servlet-name>FacesServlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>FacesServlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.xhtml</welcome-file>
</welcome-file-list>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
<param-value>TRUE</param-value>
</context-param>
</web-app>
谢谢您的回答。如果您需要更多信息，请告诉我。