SSH項目啟動報錯Unable to load configuration. - bean - jar:file，具體配置以及錯誤資訊如下所示，請求大神幫忙解答一下

項目用的是tomcat7、Myeclipse10、jdk是j2SE-1.5,架構是spring+struts2+hibernate，項目啟動報錯是什麼原因？怎麼解決呢？

**applicationContext.xml的配置**：

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">


	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName"
			value="oracle.jdbc.OracleDriver">
		</property>
		<property name="url"
			value="jdbc:oracle:thin:@localhost:1521:oracle">
		</property>
		<property name="username" value="scott"></property>
		<property name="password" value="123456"></property>
	</bean>
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.Oracle9Dialect
				</prop>
			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>com/mo/user/bean/OaUser.hbm.xml</value></list>
		</property></bean>
	<bean id="OaUserDAOImpl" class="com.mo.user.daoimpl.OaUserDAOImpl"></bean></beans>
           

# **web.xml的配置**：

<?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">
  <display-name></display-name>    
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <!-- 配置Struts2攔截器 -->
  <filter>
      <filter-name>struts2</filter-name>
      <filter-class>
          org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
      </filter-class>
  </filter>
  <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!--通過配置ContextLoaderListener監聽器，使容器啟動時，自動加載applicationContext配置  -->
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>    
  <!-- 預設情況下，會加載WEB-INF/applicationContext.xml這個檔案，我們可以通過配置contextConfigLocation參數改變配置檔案的路徑 -->  
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>    
  </web-app>
           

#  **Struts2的配置**：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
  <action name="LoginAction" class="com.mo.user.action.UserLoginAction">
   <result name="success">index.jsp</result>
   <result name="input">login.jsp</result>
  </action>
 </package>
</struts>    
           

# **錯誤提示資訊**：

嚴重: Exception starting filter struts2
Unable to load configuration. - bean - jar:file:/E:/JavaTomcat/apache-tomcat-7.0.75/webapps/OASystem.myeclipse.bak/WEB-INF/lib/struts2-core-2.3.15.1.jar!/struts-default.xml:29:72
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:428)
    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:279)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4854)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5546)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1948)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    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:745)
Caused by: Unable to load configuration. - bean - jar:file:/E:/JavaTomcat/apache-tomcat-7.0.75/webapps/OASystem.myeclipse.bak/WEB-INF/lib/struts2-core-2.3.15.1.jar!/struts-default.xml:29:72
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415)
    ... 18 more
Caused by: Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/E:/JavaTomcat/apache-tomcat-7.0.75/webapps/OASystem.myeclipse.bak/WEB-INF/lib/struts2-core-2.3.15.1.jar!/struts-default.xml:29:72
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:232)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:180)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    ... 20 more
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - jar:file:/E:/JavaTomcat/apache-tomcat-7.0.75/webapps/OASystem.myeclipse.bak/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72 - bean - jar:file:/E:/JavaTomcat/apache-tomcat-7.0.75/webapps/OASystem.myeclipse.bak/WEB-INF/lib/struts2-core-2.3.15.1.jar!/struts-default.xml:29:72
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:216)
    ... 23 more