struts2启动报错com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1
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: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.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: java.lang.NullPointerException at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:220)
?原因：工程web.xml中没有配置加载spring ApplicationContext相关的listener
解决办法：在web.xml中加入：
<listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener>
?原理：
查看struts2插件struts2-spring-plugin中的strtus-plugin.xml
<struts> <bean type="com.opensymphony.xwork2.ObjectFactory" name="spring" /> <!-- Make the Spring object factory the automatic default --> <constant name="struts.objectFactory" value="spring" /> <constant name="struts.class.reloading.watchList" value="" /> <constant name="struts.class.reloading.acceptClasses" value="" /> <constant name="struts.class.reloading.reloadConfig" value="false" /> <package name="spring-default"> <interceptors> <interceptor name="autowiring" name="code"><bean type="com.opensymphony.xwork2.ObjectFactory" name="spring" /> <!-- Make the Spring object factory the automatic default --> <constant name="struts.objectFactory" value="spring" />
?错误2：IOException parsing XML document from ServletContext resource [/WEB-INF/class
解决办法1：在web.xml中加入如下代码
<context-param> <param-name>contextConfigLocation </param-name> <param-value>/WEB-INF/classes/applicationContext.xml </param-value></context-param>
问题主要由于加载spring的默认配置文件位置一般是在/WEB-INF/下找applicationContext.xml文件。而Myeclipse文件自动生成的applicationContext文件是放在/WEB-INF/classes/applicationContext.xml。所以在默认加载中是找不到applicationContext.xml文件的，必须加入上面配置。 解决方法2：将IDE自动生成的applicationContext.xml放到WEB-INF 文件夹下即可。
