我正在创建结合了 Struts 2 和 Spring 3 框架的应用程序。
下面是我的 web.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>Struts 2</display-name>
<welcome-file-list>
<welcome-file>jsp/index.jsp</welcome-file>
</welcome-file-list>
<!-- Filter Start -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter>
<filter-name>sitemesh</filter-name>
<filter-class>com.opensymphony.sitemesh.webapp.SiteMeshFilter</filter-class>
</filter>
<!-- Filter End -->
<!-- Filter Mapping Start -->
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>sitemesh</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
<!-- Filter Mapping End -->
<!-- Listener Start -->
<!-- Struts Start -->
<listener>
<listener-class>org.apache.struts2.dispatcher.ng.listener.StrutsListener</listener-class>
</listener>
<!-- Struts End -->
<!-- Spring Start -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring End -->
<!-- Listener End -->
<!-- Servlet Start -->
<servlet>
<servlet-name>sitemesh-freemarker</servlet-name>
<servlet-class>org.apache.struts2.sitemesh.FreemarkerDecoratorServlet</servlet-class>
<init-param>
<param-name>default_encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Servlet End -->
<!-- Servlet Mapping Start -->
<servlet-mapping>
<servlet-name>sitemesh-freemarker</servlet-name>
<url-pattern>*.ftl</url-pattern>
</servlet-mapping>
<!-- Servlet Mapping End -->
</web-app>
我的 applicationContext.xml 如下
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="test1" class="tc.account.LoginAction"/>
</beans>
而struts.xml如下
<?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.devMode" value="true" />
<constant name="struts.custom.i18n.resources"
value="ApplicationResources" />
<package name="default" extends="struts-default">
<action name="index">
<result >jsp/index.jsp</result>
</action>
<!-- <action name=""> -->
<!-- <result>jsp/index.jsp</result> -->
<!-- </action> -->
<action name="login"
class="tc.account.LoginAction">
<result name="success">jsp/index.jsp</result>
<result name="error">jsp/account/login.jsp</result>
</action>
</package>
</struts>
当我删除 Spring 侦听器时，应用程序工作正常。但我想包括 IOC 和 DI 的 Spring 框架。我已经配置了相同的内容，web.xml但是在加载应用程序时它给了我以下错误：
Sep 30, 2013 11:19:16 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.apache.struts2.dispatcher.ng.listener.StrutsListener
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 230 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:230:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:502)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
at org.apache.struts2.dispatcher.ng.listener.StrutsListener.contextInitialized(StrutsListener.java:46)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381)
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$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:230)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:604)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:574)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:530)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:292)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:250)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490)
我没有看到我包含了所有必需的库的问题。