Struts2 appears at Com.opensymphony.xwork2.util.filemanager$filerevision.needsreloading (filemanager.java:20.

Watch the video today see struts2 in the configuration file in the future as long as you add the following configuration, then modify the configuration file later without restarting the Tomcat method. So I tried it by hand, I didn't think it was a test.

The code to add:

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1. <constant name="Struts.devmode" value="true" />

<constant name= "Struts.devmode" value= "true"/>

Struts.devmode is the development mode of struts, the default value is False, here is modified to true, and once the configuration in this file does not have to restart Tomcat, it is really convenient. But the problem also arises:

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2. Severity: Exception Starting filter Struts2
4. Java.lang.NullPointerException
6. At Com.opensymphony.xwork2.util.filemanager$filerevision.needsreloading (filemanager.java:209)
8. At Com.opensymphony.xwork2.util.FileManager.fileNeedsReloading (filemanager.java:60)
10. At Com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.needsReload (Xmlconfigurationprovider.java : 325)
12. At Org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload (strutsxmlconfigurationprovider.java:168 )
14. At Com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload (configurationmanager.java:220)
16. At Com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration (configurationmanager.java:61)
18. At Org.apache.struts2.dispatcher.Dispatcher.getContainer (dispatcher.java:774)
20. At Org.apache.struts2.dispatcher.ng.InitOperations.initStaticContentLoader (initoperations.java:77)
22. At Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init ( STRUTSPREPAREANDEXECUTEFILTER.JAVA:49)
24. At Org.apache.catalina.core.ApplicationFilterConfig.getFilter (applicationfilterconfig.java:275)
26. At Org.apache.catalina.core.ApplicationFilterConfig.setFilterDef (applicationfilterconfig.java:397)
28. At Org.apache.catalina.core.applicationfilterconfig.<init> (applicationfilterconfig.java:108)
30. At Org.apache.catalina.core.StandardContext.filterStart (standardcontext.java:3800)
32. At Org.apache.catalina.core.StandardContext.start (standardcontext.java:4450)
34. At Org.apache.catalina.core.ContainerBase.addChildInternal (containerbase.java:791)
36. At Org.apache.catalina.core.ContainerBase.addChild (containerbase.java:771)
38. At Org.apache.catalina.core.StandardHost.addChild (standardhost.java:526)
40. At Org.apache.catalina.startup.HostConfig.deployDirectory (hostconfig.java:987)
42. At Org.apache.catalina.startup.HostConfig.deployDirectories (hostconfig.java:909)
44. At Org.apache.catalina.startup.HostConfig.deployApps (hostconfig.java:495)
46. At Org.apache.catalina.startup.HostConfig.start (hostconfig.java:1206)
48. At Org.apache.catalina.startup.HostConfig.lifecycleEvent (hostconfig.java:314)
50. At Org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent (lifecyclesupport.java:119)
52. At Org.apache.catalina.core.ContainerBase.start (containerbase.java:1053)
54. At Org.apache.catalina.core.StandardHost.start (standardhost.java:722)
56. At Org.apache.catalina.core.ContainerBase.start (containerbase.java:1045)
58. At Org.apache.catalina.core.StandardEngine.start (standardengine.java:443)
60. At Org.apache.catalina.core.StandardService.start (standardservice.java:516)
62. At Org.apache.catalina.core.StandardServer.start (standardserver.java:710)
64. At Org.apache.catalina.startup.Catalina.start (catalina.java:583)
66. At Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
68. At Sun.reflect.NativeMethodAccessorImpl.invoke (nativemethodaccessorimpl.java:39)
70. At Sun.reflect.DelegatingMethodAccessorImpl.invoke (delegatingmethodaccessorimpl.java:25)
72. At Java.lang.reflect.Method.invoke (method.java:597)
74. At Org.apache.catalina.startup.Bootstrap.start (bootstrap.java:288)
76. At Org.apache.catalina.startup.Bootstrap.main (bootstrap.java:413)
78. 2010-3-1 22:26:44 org.apache.catalina.core.StandardContext Start
80. Severity: Error filterstart

Severity: Exception starting filter Struts2java.lang.NullPointerExceptionat com.opensymphony.xwork2.util.filemanager$ Filerevision.needsreloading (filemanager.java:209) at com.opensymphony.xwork2.util.FileManager.fileNeedsReloading (filemanager.java:60) at Com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.needsReload ( xmlconfigurationprovider.java:325) at Org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload ( strutsxmlconfigurationprovider.java:168) at Com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload (configurationmanager.java:220) at Com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration (configurationmanager.java:61) at Org.apache.struts2.dispatcher.Dispatcher.getContainer (dispatcher.java:774) at Org.apache.struts2.dispatcher.ng.InitOperations.initStaticContentLoader (initoperations.java:77) at Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init (Strutsprepareandexecutefilter.java : +) at Org.apache.catalina.core.ApplicaTionfilterconfig.getfilter (applicationfilterconfig.java:275) at Org.apache.catalina.core.ApplicationFilterConfig.setFilterDef (applicationfilterconfig.java:397) at Org.apache.catalina.core.applicationfilterconfig.<init> (applicationfilterconfig.java:108) at Org.apache.catalina.core.StandardContext.filterStart (standardcontext.java:3800) at Org.apache.catalina.core.StandardContext.start (standardcontext.java:4450) at Org.apache.catalina.core.ContainerBase.addChildInternal (containerbase.java:791) at Org.apache.catalina.core.ContainerBase.addChild (containerbase.java:771) at Org.apache.catalina.core.StandardHost.addChild (standardhost.java:526) at Org.apache.catalina.startup.HostConfig.deployDirectory (hostconfig.java:987) at Org.apache.catalina.startup.HostConfig.deployDirectories (hostconfig.java:909) at Org.apache.catalina.startup.HostConfig.deployApps (hostconfig.java:495) at Org.apache.catalina.startup.HostConfig.start (hostconfig.java:1206) at Org.apache.catalina.startup.HostConfig.lifecycleEvent (Hostconfig.java:314) at Org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent (lifecyclesupport.java:119) at Org.apache.catalina.core.ContainerBase.start (containerbase.java:1053) at Org.apache.catalina.core.StandardHost.start (standardhost.java:722) 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:516) at Org.apache.catalina.core.StandardServer.start (standardserver.java:710) at Org.apache.catalina.startup.Catalina.start (catalina.java:583) 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:597) at Org.apache.catalina.startup.Bootstrap.start (Bootstrap.java : 288) at Org.apache.catalina.startup.Bootstrap.main (bootstrap.java:413) 2010-3-1 22:26:44 org.apache.catalina.core.StandardContext start severity: Error filterstart

After Google a search, said will <constant name= "Struts.devmode" value= "true"/> in the value to False, I want to be true, changed to false not against my intention, Later, after several searches, it was said that the Bug,tomcat directory belonging to struts2.1 could not have spaces. I look closely at my Tomcat path, and there really are spaces ...

Finally, it is possible to find this method by modifying the path itself.

Struts2 appears at Com.opensymphony.xwork2.util.filemanager$filerevision.needsreloading (filemanager.java:20.