Long time no struts2, today configuration strut2.2.1, startup encountered a small problem. Recorded.
Tomcat Startup error:
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Class: com.opensymphony.xwork2.spring.SpringObjectFactoryFile: SpringObjectFactory.javaMethod: getClassInstanceLine: 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) |
Principle:
View the Strtus-plugin.xml in the Struts2 plug-in Struts2-spring-plugin
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<struts> <beantype="com.opensymphony.xwork2.ObjectFactory"name="spring"class="org.apache.struts2.spring.StrutsSpringObjectFactory"/> <!-- Make the Spring object factory the automatic default --> <constantname="struts.objectFactory"value="spring"/> <constantname="struts.class.reloading.watchList"value=""/> <constantname="struts.class.reloading.acceptClasses"value=""/> <constantname="struts.class.reloading.reloadConfig"value="false"/> <packagename="spring-default"> <interceptors> <interceptorname="autowiring"class="com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor"/> <interceptorname="sessionAutowiring"class="org.apache.struts2.spring.interceptor.SessionContextAutowiringInterceptor"/> </interceptors> </package> </struts> |
Note The following section, indicating that the plug-in was introduced into the project, and that the struts Objectfactory is automatically set to Strutsspringobjectfactory, allowing spring's IOC container to host the struts action. So it caused the startup problem.
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<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"/> |
Struts2 Start Error com/opensymphony/xwork2/spring/springobjectfactory.java:220:-1
