我正在尝试在在线考试中实现STRUTS SPRING和HIBERNATE INTEGRATION。使用apache tomcat
7.0.42在Eclipse Kepler中运行项目时，抛出以下错误

**HTTP Status 404 - /OnlineExam/registration.jsp**
**Description:**The requested resource is not available.

在控制台日志中，出现以下内容，

    SEVERE: Exception starting filter struts2
Unable to load configuration. - action - file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp3/wtpwebapps/iSAS/WEB-INF/classes/struts.xml:16:73
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
    at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4775)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5452)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:724)
Caused by: Unable to load configuration. - action - file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp3/wtpwebapps/iSAS/WEB-INF/classes/struts.xml:16:73
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
    ... 14 more
Caused by: Error building results for action userRegistration in namespace  - action - file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp3/wtpwebapps/iSAS/WEB-INF/classes/struts.xml:16:73
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:367)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:468)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
    ... 16 more
Caused by: There is no result type defined for type 'tiles' mapped with name 'SUCCESS'.  Did you mean 'tiles'? - result - file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp3/wtpwebapps/iSAS/WEB-INF/classes/struts.xml:17:40
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:621)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:365)
    ... 21 more

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" />
    <constant name="struts.ui.theme" value="simple" />
    <constant name="struts.devMode" value="true" />

    <package name="default" extends="struts-default">       
        <result-types>
            <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult"/>
        </result-types>

        <action name="userRegistration" method="{1}" class="userRegistration">
            <result name="SUCCESS" type="tiles">isas.user.registration</result>
            <result name="ERROR" type="tiles">isas.errorPage</result>
            <result name="input" type="tiles">isas.user.registration</result>
        </action>

    </package>
</struts>

请帮我朋友。我不知道为什么会出现。无论如何在此先感谢… !!!