RepositoryFactory已经在tiles和Velocity Integration中初始化了Exception

Question

我正在尝试在Spring MVC中集成tiles + velocity。

我发现github中的链接服务于同一目的。所以我在Eclispe的Project中使用这些类。 当我运行项目时，我得到以下异常：

HTTP Status 500 - Servlet.init() for servlet appServlet threw exception

type Exception report

message Servlet.init() for servlet appServlet threw exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet appServlet threw exception
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

root cause

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tilesConfigurer' defined in ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml]: Invocation of init method failed; nested exception is java.lang.RuntimeException: Could not initialize VelocityEngine: java.lang.IllegalStateException: The RepositoryFactory has already been initialized!
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:160)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

root cause

java.lang.RuntimeException: Could not initialize VelocityEngine: java.lang.IllegalStateException: The RepositoryFactory has already been initialized!
    org.apache.velocity.tools.view.VelocityView.init(VelocityView.java:354)
    org.apache.velocity.tools.view.VelocityView.init(VelocityView.java:310)
    org.apache.velocity.tools.view.VelocityView.<init>(VelocityView.java:213)
    org.apache.tiles.velocity.renderer.VelocityAttributeRenderer.commit(VelocityAttributeRenderer.java:82)
    com.me.velo.VelocityTilesContainerFactory.registerAttributeRenderers(VelocityTilesContainerFactory.java:175)
    org.apache.tiles.factory.BasicTilesContainerFactory.createRendererFactory(BasicTilesContainerFactory.java:411)
    org.apache.tiles.factory.BasicTilesContainerFactory.createContainer(BasicTilesContainerFactory.java:111)
    org.apache.tiles.startup.AbstractTilesInitializer.createContainer(AbstractTilesInitializer.java:124)
    org.apache.tiles.startup.AbstractTilesInitializer.initialize(AbstractTilesInitializer.java:70)
    org.springframework.web.servlet.view.tiles2.TilesConfigurer.afterPropertiesSet(TilesConfigurer.java:339)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:160)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

root cause

java.lang.IllegalStateException: The RepositoryFactory has already been initialized!
    org.apache.velocity.runtime.resource.loader.StringResourceLoader$RepositoryFactory.setRepositoryClass(StringResourceLoader.java:209)
    org.apache.velocity.runtime.resource.loader.StringResourceLoader.init(StringResourceLoader.java:99)
    org.apache.velocity.runtime.resource.ResourceManagerImpl.initialize(ResourceManagerImpl.java:147)
    org.apache.velocity.runtime.RuntimeInstance.initializeResourceManager(RuntimeInstance.java:594)
    org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:241)
    org.apache.velocity.app.VelocityEngine.init(VelocityEngine.java:116)
    org.apache.velocity.tools.view.VelocityView.init(VelocityView.java:347)
    org.apache.velocity.tools.view.VelocityView.init(VelocityView.java:310)
    org.apache.velocity.tools.view.VelocityView.<init>(VelocityView.java:213)
    org.apache.tiles.velocity.renderer.VelocityAttributeRenderer.commit(VelocityAttributeRenderer.java:82)
    com.me.velo.VelocityTilesContainerFactory.registerAttributeRenderers(VelocityTilesContainerFactory.java:175)
    org.apache.tiles.factory.BasicTilesContainerFactory.createRendererFactory(BasicTilesContainerFactory.java:411)
    org.apache.tiles.factory.BasicTilesContainerFactory.createContainer(BasicTilesContainerFactory.java:111)
    org.apache.tiles.startup.AbstractTilesInitializer.createContainer(AbstractTilesInitializer.java:124)
    org.apache.tiles.startup.AbstractTilesInitializer.initialize(AbstractTilesInitializer.java:70)
    org.springframework.web.servlet.view.tiles2.TilesConfigurer.afterPropertiesSet(TilesConfigurer.java:339)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
    javax.servlet.GenericServlet.init(GenericServlet.java:160)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.35 logs.
Apache Tomcat/7.0.35

我真的不知道这意味着什么，但在查看根本原因之后我发现了这一点 RepositoryFactory已经初始化是主要原因。 我正在使用github提供的存储库中提供的类，我在上面提到的链接和我的servlet-context.xml是

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <!-- 
    <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>
     -->
    <context:component-scan base-package="com.me.velo" />

    <!--  
    <beans:bean id="tilesViewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <beans:property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView"/>
        <beans:property name="order" value="1"/>
    </beans:bean>

    <beans:bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
        <beans:property name="resourceLoaderPath" value="/WEB-INF/views/" />
    </beans:bean>

    <beans:bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">
        <beans:property name="cache" value="true"/>
        <beans:property name="prefix" value="/WEB-INF/views/"/>
        <beans:property name="suffix" value=".vm"/>
        <beans:property name="order" value="2"/>
    </beans:bean>

    <beans:bean id="tilesConfigurer" 
    class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
    <beans:property name="definitions">
        <beans:list>
            <beans:value>/WEB-INF/tiles.xml</beans:value>
        </beans:list>
    </beans:property>
    </beans:bean>
    -->
    <!-- velocity + tiles initializer -->
<beans:bean id="velocityTilesInitializer" class="com.me.velo.VelocityTilesInitializer">
    <beans:property name="veolocityToolbox" value="/WEB-INF/tools.xml" />
    <beans:property name="veolocityProperties" value="/WEB-INF/velocity.properties" />
    <beans:property name="definitions">
        <beans:list>
            <beans:value>/WEB-INF/tiles.xml</beans:value>
        </beans:list>
    </beans:property>
</beans:bean>

<!-- tiles config with velocityTiles initializer -->
<beans:bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
    <beans:property name="tilesInitializer" ref="velocityTilesInitializer" />
</beans:bean>

<!-- tiles view -->
<beans:bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
    <beans:property name="viewClass" value="sk.openhouse.web.VelocityTilesView" />
    <beans:property name="contentType" value="text/html;charset=UTF-8" />
    <!-- default attributes for every view -->
    <beans:property name="attributesMap">
        <beans:map>
            <beans:entry key="authentication" value-ref="authenticationService" />
        </beans:map>
    </beans:property>
</beans:bean>
</beans:beans>

tiles.xml：

<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"
       "http://tiles.apache.org/dtds/tiles-config_2_1.dtd">

  <tiles-definitions>
  <definition name="base.definition" template="/WEB-INF/velocity/layout.vm">

             <put-attribute name="body" value="" />
  </definition>

  <definition name="home" extends="base.definition">
             <put-attribute name="body" value="/WEB-INF/velocity/test.vm" />
  </definition>
  </tiles-definitions>

velocity.properties：

userdirective=org.apache.tiles.velocity.template.AddAttributeDirective,\
  org.apache.tiles.velocity.template.AddListAttributeDirective,\
  org.apache.tiles.velocity.template.DefinitionDirective,\
  org.apache.tiles.velocity.template.GetAsStringDirective,\
  org.apache.tiles.velocity.template.ImportAttributeDirective,\
  org.apache.tiles.velocity.template.InsertAttributeDirective,\
  org.apache.tiles.velocity.template.InsertDefinitionDirective,\
  org.apache.tiles.velocity.template.InsertTemplateDirective,\
  org.apache.tiles.velocity.template.PutAttributeDirective,\
  org.apache.tiles.velocity.template.PutListAttributeDirective

的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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_2_5.xsd">

    <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/root-context.xml</param-value>
    </context-param>

    <!-- Creates the Spring Container shared by all Servlets and Filters -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Processes application requests -->
    <servlet>
        <servlet-name>appServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

<servlet>
  <servlet-name>velocity</servlet-name>
  <servlet-class>org.apache.velocity.tools.view.VelocityViewServlet</servlet-class>

  <init-param>
    <param-name>org.apache.velocity.toolbox</param-name>
    <param-value>/WEB-INF/tools.xml</param-value>
  </init-param>

  <init-param>
    <param-name>org.apache.velocity.properties</param-name>
    <param-value>/WEB-INF/velocity.properties</param-value>
  </init-param>

</servlet>

    <servlet-mapping>
        <servlet-name>appServlet</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>

<welcome-file-list>
<welcome-file>one.jsp</welcome-file>
</welcome-file-list>
</web-app>

我不确定导致此异常的原因。如果有人遇到此例外，请提供帮助。 提前谢谢。