struts2启动报错com/opensymphony/xwork2/spring/SpringObjectFactory.java:220:-1 博客分类: JavaEE SpringJavaApacheStrutsBean
程序员文章站
2024-02-21 18:08:34
...
好久没有搞struts2,今天配置strut2.2.1,启动时遇到个小问题。记录下。
tomcat启动报错:
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:
配置了依赖:
<dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-spring-plugin</artifactId> <version>2.2.1</version> </dependency>
但是工程web.xml中没有配置加载spring ApplicationContext相关的listener
<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" class="org.apache.struts2.spring.StrutsSpringObjectFactory" /> <!-- 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" class="com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor"/> <interceptor name="sessionAutowiring" class="org.apache.struts2.spring.interceptor.SessionContextAutowiringInterceptor"/> </interceptors> </package> </struts>
注意下面部分,表明该插件引入工程后,会自动设置Struts的ObjectFactory为StrutsSpringObjectFactory,从而让Spring的IOC容器来托管Struts的Action。所以导致了启动的问题。
<bean type="com.opensymphony.xwork2.ObjectFactory" name="spring" class="org.apache.struts2.spring.StrutsSpringObjectFactory" /> <!-- Make the Spring object factory the automatic default --> <constant name="struts.objectFactory" value="spring" />
记录一下错误,方便查看。