com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1问题出现的原因及解决办法

com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1问题出现的原因及解决办法

Class: com.opensymphony.xwork2.spring.SpringObjectFactory

File: SpringObjectFactory.java

Method: getClassInstance

Line: 220 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1

 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:437)

 at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:195)

 at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)

 at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)

 at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)

 at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)

 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4356)

 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)

 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)

 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)

 at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)

 at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)

 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)

 at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1215)

 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)

 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)

 at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)

 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)

 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)

 at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)

 at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.NullPointerException

 at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:220)

 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:530)

 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:501)

 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:457)

 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:275)

 at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)

 at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:204)

 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)

 at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:380)

 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:424)

 ... 20 more

2011-8-28 1:19:47 org.apache.catalina.core.StandardContext start

严重: Error filterStart

2011-8-28 1:19:47 org.apache.catalina.core.StandardContext start

严重: Context [] startup failed due to previous errors

一、原因：

      问题处在你导入的“Struts2 Spring Libraries”库下的“Struts2-spring-plugin-2.2.1.jar”jar包下的struts-plugin.xml里。如下图：



       问题出现的具体位置在上图所示的第29行的代码，这段代码如下：

<bean type="com.opensymphony.xwork2.ObjectFactory" name="spring" class="org.apache.struts2.spring.StrutsSpringObjectFactory" />

       这
表明该插件引入工程后，会自动设置Struts的
ObjectFactory为
Stru
4000
tsSpringObjectFactory，从而让Spring的IOC容器来托管Struts的Action。但是
在工程的web.xml中 没有配置
加载spring ApplicationContext相关的listener ，从而导致了启动时出现的问题：com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1。

二、解决办法

在工程的web.xml中

配置
加载spring ApplicationContext相关的listener ，配置的代码如下：

    <context-param>

        <param-name>

            contextConfigLocation

        </param-name>

        <param-value>

            /WEB-INF/applicationContext.xml

        </param-value>

    </context-param>

    <listener>

        <listener-class>

            org.springframework.web.context.ContextLoaderListener

        </listener-class>

    </listener> 终于解决了这个小问题，记录一下，方便查看和回顾，也希望能帮到遇到这个问题需要