Struts2-tiles-plugin 2.3.28 - StrutsTilesListener 抛出 NullPointerException

Struts2-tiles-plugin 2.3.28 - StrutsTilesListener throws NullPointerException

我正在从 struts-2.3.24.1 升级到 struts-2.3.28,并且这样做必须将 tile 从 2.1.2 升级到 2.2.2。我在 WebLogic Server 12.1.3 上部署。我的应用程序是使用 Maven 3 构建的,没有错误,但是当我部署时,它会生成以下错误:

<User defined listener org.apache.struts2.tiles.StrutsTilesListener failed: java.lang.NullPointerException.java.lang.NullPointerException
    at java.io.File.<init>(Unknown Source)
    at org.apache.struts2.tiles.StrutsWildcardServletTilesApplicationContext.<init>(StrutsWildcardServletTilesApplicationContext.java:53)

自从使用 struts 2.3.24.1 以来,应用程序没有任何变化。在 tiles-defs.xml 中引用的位置有 .jsp 个文件。我尝试了很多不同的方法来解决这个问题,但总是出现同样的错误。我也没有看到之前讨论过这个特定问题。我还需要通过他的特定升级来改变什么?我错过了什么?

谢谢,

完整堆栈跟踪:

    <User defined listener org.apache.struts2.tiles.StrutsTilesListener failed: java.lang.NullPointerException.java.lang.NullPointerException
    at java.io.File.<init>(Unknown Source)
    at org.apache.struts2.tiles.StrutsWildcardServletTilesApplicationContext.<init>(StrutsWildcardServletTilesApplicationContext.java:53)
    at org.apache.struts2.tiles.StrutsTilesInitializer.createTilesApplicationContext(StrutsTilesInitializer.java:37)
    at org.apache.tiles.startup.AbstractTilesInitializer.initialize(AbstractTilesInitializer.java:68)
    at org.apache.tiles.web.startup.AbstractTilesListener.contextInitialized(AbstractTilesListener.java:62)
    at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:678)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
    at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
    at weblogic.servlet.internal.EventsManager.executeContextListener(EventsManager.java:243)
    at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:200)
    at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:185)
    at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1838)
    at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2876)
    at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1661)
    at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:823)
    at weblogic.application.internal.ExtensibleModuleWrapper$StartStateChange.next(ExtensibleModuleWrapper.java:360)
    at weblogic.application.internal.ExtensibleModuleWrapper$StartStateChange.next(ExtensibleModuleWrapper.java:356)
    at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:42)
    at weblogic.application.internal.ExtensibleModuleWrapper.start(ExtensibleModuleWrapper.java:138)
    at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:124)
    at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:216)
    at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:211)
    at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:42)
    at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:73)
    at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:24)
    at weblogic.application.internal.BaseDeployment.next(BaseDeployment.java:729)
    at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:42)
    at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:258)
    at weblogic.application.internal.SingleModuleDeployment.activate(SingleModuleDeployment.java:48)
    at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:165)
    at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
    at weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:226)
    at weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:418)
    at weblogic.management.deploy.internal.DeploymentAdapter.doActivate(DeploymentAdapter.java:51)
    at weblogic.management.deploy.internal.DeploymentAdapter.activate(DeploymentAdapter.java:200)
    at weblogic.management.deploy.internal.AppTransition.transitionApp(AppTransition.java:30)
    at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:240)
    at weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:169)
    at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:123)
    at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:210)
    at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:118)
    at weblogic.server.AbstractServerService.postConstruct(AbstractServerService.java:78)
    at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.glassfish.hk2.utilities.reflection.ReflectionHelper.invoke(ReflectionHelper.java:1017)
    at org.jvnet.hk2.internal.ClazzCreator.postConstructMe(ClazzCreator.java:388)
    at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:430)
    at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:456)
    at org.glassfish.hk2.runlevel.internal.AsyncRunLevelContext.findOrCreate(AsyncRunLevelContext.java:225)
    at org.glassfish.hk2.runlevel.RunLevelContext.findOrCreate(RunLevelContext.java:82)
    at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2488)
    at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:98)
    at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:606)
    at org.jvnet.hk2.internal.ThreeThirtyResolver.resolve(ThreeThirtyResolver.java:77)
    at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:231)
    at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:254)
    at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:413)
    at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:456)
    at org.glassfish.hk2.runlevel.internal.AsyncRunLevelContext.findOrCreate(AsyncRunLevelContext.java:225)
    at org.glassfish.hk2.runlevel.RunLevelContext.findOrCreate(RunLevelContext.java:82)
    at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2488)
    at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:98)
    at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:87)
    at org.glassfish.hk2.runlevel.internal.CurrentTaskFuture$QueueRunner.oneJob(CurrentTaskFuture.java:1162)
    at org.glassfish.hk2.runlevel.internal.CurrentTaskFuture$QueueRunner.run(CurrentTaskFuture.java:1147)
    at org.glassfish.hk2.runlevel.internal.CurrentTaskFuture$UpOneLevel.run(CurrentTaskFuture.java:753)
    at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:553)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:311)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:263)

pom.xml 节选

    <properties>
    <struts2-version>2.3.28</struts2-version>
    <tiles-version>2.2.2</tiles-version>
    </properties>
    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-core</artifactId>
        <version>${struts2-version}</version>
        <exclusions>
            <exclusion>
                <groupId>javassist</groupId>
                <artifactId>javassist</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-convention-plugin</artifactId>
        <version>${struts2-version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-junit-plugin</artifactId>
        <version>${struts2-version}</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-rest-plugin</artifactId>
        <version>${struts2-version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-spring-plugin</artifactId>
        <version>${struts2-version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-tiles-plugin</artifactId>
        <version>${struts2-version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-jsp</artifactId>
        <version>${tiles-version}</version>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-core</artifactId>
        <version>${tiles-version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-el</artifactId>
        <version>${tiles-version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-freemarker</artifactId>
        <version>${tiles-version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-ognl</artifactId>
        <version>${tiles-version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-api</artifactId>
        <version>${tiles-version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-servlet</artifactId>
        <version>${tiles-version}</version>
    </dependency>   

Struts.xml

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> 
<struts>

<constant name="struts.enable.DynamicMethodInvocation" value="TRUE" />

<bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" class="path.mapper.GfpDynamicMapper" name="gfpDynamicMapper"/>
<constant name="struts.mapper.class" value="gfpDynamicMapper" /> 

<constant name="struts.convention.action.includeJars" value=".*_wl_cls_gen.*"/>
<constant name="struts.convention.action.fileProtocols" value="jar,zip" />


<constant name="struts.convention.action.suffix" value="Controller" />
<constant name="struts.convention.action.mapAllMatches" value="true" />
<constant name="struts.convention.default.parent.package" value="default" />
<constant name="struts.custom.i18n.resources" value="path/application-gfp" />
<constant name="struts.objectFactory" value="spring" />
<constant name="struts.convention.result.path" value="tiles/gfp"/>


<!-- Handler setup -->
<bean name="gfpXml"  type="org.apache.struts2.rest.handler.ContentTypeHandler" class="path.handler.GfpXmlHandler" />
<bean type="com.opensymphony.xwork2.UnknownHandler" name="handler" class="path.handler.UnknownHandler"/>
<package name="default" namespace="/actions" extends="rest-default">
    <result-types>
        <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" />
    </result-types>

    <interceptors>

        <interceptor name="userInterceptor"  class="path.interceptors.UserInterceptor" />

        <interceptor name="exceptionMapper" class="path.interceptors.ExceptionMappingInterceptor">
            <param name="logEnabled">true</param>
        </interceptor>

        <interceptor name="cachingHeadersInterceptor" class="path.interceptors.CachingHeadersInterceptor"/>
        <interceptor-stack name="interceptorStack">
            <interceptor-ref name="exceptionMapper"/>
            <interceptor-ref name="tokenSession" >
                <param name="excludeMethods">create,edit,index,show,compare,ulns,showInvalidUlns,toggleExternalUics,status,exportSummary,summary,exportSlice,exportSlices,export,exportUlns,exportPids,exportPcode,exportArt,exportAst,exportDrrs,exportOrgAssoc,exportBillet,exportEquipment,exportLeaderAssoc,exportGfmts,exportSorts,exportUSMCSliderPull,exportWebSked,exportExcel,exportSliceCompare,exportSliceCompareCritieria,exportCargo,exportPersonnel,showSliceSummary</param>
            </interceptor-ref>
            <interceptor-ref name="alias"/>
            <interceptor-ref name="userInterceptor"/>
            <interceptor-ref name="servletConfig"/>
            <interceptor-ref name="messages">
                <param name="operationMode">AUTOMATIC</param>
            </interceptor-ref>
            <interceptor-ref name="prepare"/>
            <interceptor-ref name="i18n"/>
            <interceptor-ref name="chain"/>
            <interceptor-ref name="debugging"/>
            <interceptor-ref name="profiling"/>
            <interceptor-ref name="scopedModelDriven"/>
            <interceptor-ref name="modelDriven">
                <param name="refreshModelBeforeResult">true</param>
            </interceptor-ref>
            <interceptor-ref name="fileUpload"/>
            <interceptor-ref name="checkbox"/>
            <interceptor-ref name="multiselect"/>
            <interceptor-ref name="staticParams"/>
            <interceptor-ref name="actionMappingParams"/>
            <interceptor-ref name="params">
                <param name="excludeParams">dojo\..*,statusCode,token,struts.token.name,import,submit,label.next,label.back,_method</param>
            </interceptor-ref>
            <interceptor-ref name="rest" />
            <interceptor-ref name="conversionError"/>
            <interceptor-ref name="validation">
                <param name="excludeMethods">input,back,cancel,browse,index,show,edit,editNew</param>
            </interceptor-ref>
            <interceptor-ref name="restWorkflow">
                <param name="excludeMethods">input,back,cancel,browse,index,show,edit,editNew</param>
            </interceptor-ref>
            <interceptor-ref name="annotationWorkflow"/>
            <interceptor-ref name="cachingHeadersInterceptor"/>
        </interceptor-stack>
      </interceptors>
</package>
</struts> 

web.xml

<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
    <param-name>org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG</param-name>
    <param-value>/WEB-INF/classes/path/tiles-defs.xml</param-value>
</context-param>    
<listener>
    <listener-class>org.apache.struts2.tiles.StrutsTilesListener</listener-class>
</listener>

方块-defs.xml

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE tiles-definitions PUBLIC"-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN" "http://tiles.apache.org/dtds/tiles-config_2_0.dtd">
<tiles-definitions>
    <definition name="layout.default" template="/WEB-INF/tiles/common/default.jsp">
        <put-attribute name="infoKey" value="" />
        <put-attribute name="titleKey" value="" />
        <put-attribute name="browserTitleKey" value="" />
        <put-attribute name="header" value="/WEB-INF/tiles/common/header.jsp" />
        <put-attribute name="content" value="" />
        <put-attribute name="menubar" value="" />
        <put-attribute name="adminMenu" value="" />
        <put-attribute name="footer" value="/WEB-INF/tiles/common/footer.jsp" />
</definition>
<definition name="layout.update" template="/WEB-INF/tiles/common/updateDefault.jsp">
    <put-attribute name="infoKey" value="" />
    <put-attribute name="titleKey" value="" />
    <put-attribute name="header" value="/WEB-INF/tiles/common/classmarkTop.jsp"/>
    <put-attribute name="content" value="" />
    <put-attribute name="menubar" value="" />
    <put-attribute name="footer" value="/WEB-INF/tiles/common/footer.jsp" />
</definition>
<definition name="layout.admin" extends="layout.default">
    <put-attribute name="adminMenu" value="/WEB-INF/tiles/gfp/admin/adminMenu.jsp" />
    </definition>
</tiles-definitions>

编辑:这与评论中提到的什么是空指针异常问题无关,因为这是 struts 和磁贴配置的问题。

编辑 2016 年 3 月 31 日: 我打开远程调试,发现上下文具有所有适当的路径(见下图)。但是,StrutsWildcardServletTilesApplicationContext.java 的第 53 行 context.getRealPath() 是 returning null,因为它无法获取该资源的绝对路径。上下文路径在上下文对象中也是正确的。我读到 getRealPath() 函数可以 return null 如果它不能将虚拟路径转换为文件来自 .war 时发生的真实路径。我该如何纠正?

Image of remote debugging

刚刚解决了我遇到的 NPE 问题。正如我上面所说,getRealPath 无法将虚拟路径转换为绝对路径是一个问题。我使用了这个线程的建议。

Why does getRealPath() return null when deployed with a .war file?

并添加了配置

<show-archived-real-path-enabled>true</show-archived-real-path-enabled>

给我的 weblogic.xml.