Grails 插件项目中的 jsf2“...backup for factory javax.faces.context.FacesContextFactory”出错
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【中文标题】Grails 插件项目中的 jsf2“...backup for factory javax.faces.context.FacesContextFactory”出错【英文标题】：Getting error with jsf2 "...backup for factory javax.faces.context.FacesContextFactory" in Grails plugin project 【发布时间】：2012-04-18 15:51:42 【问题描述】：我在开发模式下运行 Grails 2.01 和 Tomcat（普通 STS 开发人员下载）。
我尝试运行 jsf 插件，但它在 Grails 2 中无法运行。
因此，为了指导我，我尝试构建自己的本地插件，将其构建为原生 v2 插件，并在途中了解插件项目。我一直在（缓慢地）解构 Grails jsf2 插件，并以艰难的方式一点一点地重建它，边走边学。
我的问题如下 - 我在本地构建了我的插件 - 称之为'wwjsf'。
我已经完成了 doWithWebDescriptor 关闭 - 但是当我运行插件时，我得到一个错误 - 服务器不会呈现 .xhtml 文件 - 任何此类请求都会给出相同的错误。
我已将最新的 Mojarra jsf 2.1.7 api/impl 文件包含到我的项目构建路径中 - 这是 Grails 2.01 中嵌入的默认 Tomcat 的错误。
Message: Could not find backup for factory javax.faces.context.FacesContextFactory.
Line | Method
->> 1008 | getFactory in javax.faces.FactoryFinder$FactoryManager
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 343 | getFactory in javax.faces.FactoryFinder
| 302 | init . . . in javax.faces.webapp.FacesServlet
| 303 | innerRun in java.util.concurrent.FutureTask$Sync
| 138 | run . . . in java.util.concurrent.FutureTask
| 886 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker
| 908 | run . . . in ''
^ 662 | run in java.lang.Thread
| Error 2012-04-04 18:32:55,748 [pool-6-thread-1] ERROR [localhost].[/wwjsf] - Servlet /wwjsf threw load() exception
Message: Could not find backup for factory javax.faces.context.FacesContextFactory.
Line | Method
->> 1008 | getFactory in javax.faces.FactoryFinder$FactoryManager
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 343 | getFactory in javax.faces.FactoryFinder
| 302 | init . . . in javax.faces.webapp.FacesServlet
| 303 | innerRun in java.util.concurrent.FutureTask$Sync
| 138 | run . . . in java.util.concurrent.FutureTask
| 886 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker
| 908 | run . . . in ''
^ 662 | run in java.lang.Thread
| Server running. Browse to http://localhost:8080/wwjsf
我已经完成了在闭包中最终确定的 web.xml 的转储，以便查看。我在 Google 上查找了错误，它说你必须设置 facesConfigureListener - 我有，我已经检查了 xml 中的 faces 服务器元素，我认为它看起来不错。
此外，我在 WEB-INF 下放了一个空 faces-config.xml（我会担心如何在稍后使用该插件的项目中创建它），正如一些 Google 警告所说，我必须将 jsf 文件放在 WEB-INF/lib 目录中 - 我手动创建了该 /lib 并将我的 jsf 2.1.7 api/impl jar 复制到其中以及用于皮带和大括号。
如何消除嵌入式 Tomcat 服务器中的这个错误？
最终的 web.xml 配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org /2001/XMLSchema-instance"
metadata-complete="true" version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>/wwjsf-development-null</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.validateXml</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.verifyObjects</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>javax.faces.application.CONFIG_FILES</param-name>
<param-value>C:\Users\802518659\Documents\grails-workspace\wwjsf\web-app\WEB-INF\faces-config.xml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>server</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_RESOURCE_RESOLVER</param-name>
<param-value>com.softwood.grails.jsf.facelets.GrailsResourceResolver</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Production</param-value>
</context-param>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.REFRESH_PERIOD</param-name>
<param-value>0</param-value>
</context-param>
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>wwjsf-development-null</param-value>
</context-param>
<filter>
<filter-name>sitemesh</filter-name>
<filter-class>org.codehaus.groovy.grails.web.sitemesh.GrailsPageFilter</filter-class>
</filter>
<filter>
<filter-name>charEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
<init-param>
<param-name>targetBeanName</param-name>
<param-value>characterEncodingFilter</param-value>
</init-param>
<init-param>
<param-name>targetFilterLifecycle</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter>
<filter-name>urlMapping</filter-name>
<filter-class>org.codehaus.groovy.grails.web.mapping.filter.UrlMappingsFilter</filter-class>
</filter>
<filter>
<filter-name>hiddenHttpMethod</filter-name>
<filter-class>org.codehaus.groovy.grails.web.filters.HiddenHttpMethodFilter</filter-class>
</filter>
<filter>
<filter-name>grailsWebRequest</filter-name>
<filter-class>org.codehaus.groovy.grails.web.servlet.mvc.GrailsWebRequestFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>charEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>hiddenHttpMethod</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>FORWARD</dispatcher>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
<filter-mapping>
<filter-name>grailsWebRequest</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>FORWARD</dispatcher>
<dispatcher>REQUEST</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
<filter-mapping>
<filter-name>sitemesh</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
<filter-mapping>
<filter-name>urlMapping</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>FORWARD</dispatcher>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
<listener>
<listener-class>org.codehaus.groovy.grails.plugins.log4j.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<listener>
<listener-class>org.codehaus.groovy.grails.web.context.GrailsContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>H2Console</servlet-name>
<servlet-class>org.h2.server.web.WebServlet</servlet-class>
<init-param>
<param-name>-webAllowOthers</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>H2Console</servlet-name>
<url-pattern>/dbconsole/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>grails</servlet-name>
<servlet-class>org.codehaus.groovy.grails.web.servlet.GrailsDispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>gsp</servlet-name>
<servlet-class>org.codehaus.groovy.grails.web.pages.GroovyPagesServlet</servlet-class>
<init-param>
<description>
Allows developers to view the intermediate source code, when they pass
a spillGroovy argument in the URL.
</description>
<param-name>showSource</param-name>
<param-value>1</param-value>
</init-param>
</servlet>
<servlet>
<servlet-name>grails-errorhandler</servlet-name>
<servlet-class>org.codehaus.groovy.grails.web.servlet.ErrorHandlingServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>gsp</servlet-name>
<url-pattern>*.gsp</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>grails-errorhandler</servlet-name>
<url-pattern>/grails-errorhandler</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>grails</servlet-name>
<url-pattern>*.dispatch</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.gsp</welcome-file>
</welcome-file-list>
<error-page>
<error-code>500</error-code>
<location>/grails-errorhandler</location>
</error-page>
<jsp-config>
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/tld/c.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
<taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://www.springframework.org/tags</taglib-uri>
<taglib-location>/WEB-INF/tld/spring.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://grails.codehaus.org/tags</taglib-uri>
<taglib-location>/WEB-INF/tld/grails.tld</taglib-location>
</taglib>
</jsp-config>
</web-app>
【问题讨论】：
【参考方案1】：当我遇到这个错误时（我使用 maven 和嵌入式码头以及 spring 和 jsf2），我在 web.xml 上添加了这个
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
错误消失了。
【讨论】：
感谢先生的精彩回答。但是为什么会这样呢？这个解决方案是如何工作的？以上是关于Grails 插件项目中的 jsf2“...backup for factory javax.faces.context.FacesContextFactory”出错的主要内容，如果未能解决你的问题，请参考以下文章