struts2出现at com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:20 .

今天看视频看到struts2中的配置文件中只要添加以下配置，那么以后修改配置文件不用重启tomcat的方法。于是自己手动试了试，没想到这一试竟然试出问题来

要添加的代码：

[xhtml] view plaincopyprint?

  1. <constant name="struts.devMode" value="true" />

<constant name="struts.devMode" value="true" />

struts.devMode也就是struts的开发模式，默认值为false，这里修改为true就可以了，以后一旦就该这个文件中的配置就不用去重启tomcat，着实方便许多。但是问题也出现了：

[c-sharp] view plaincopyprint?

  1. 严重: Exception starting filter struts2
  2. java.lang.NullPointerException
  3. at com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:209)
  4. at com.opensymphony.xwork2.util.FileManager.fileNeedsReloading(FileManager.java:60)
  5. at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.needsReload(XmlConfigurationProvider.java:325)
  6. at org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload(StrutsXmlConfigurationProvider.java:168)
  7. at com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload(ConfigurationManager.java:220)
  8. at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:61)
  9. at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:774)
  10. at org.apache.struts2.dispatcher.ng.InitOperations.initStaticContentLoader(InitOperations.java:77)
  11. at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:49)
  12. at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
  13. at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
  14. at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
  15. at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3800)
  16. at org.apache.catalina.core.StandardContext.start(StandardContext.java:4450)
  17. at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
  18. at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
  19. at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
  20. at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:987)
  21. at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:909)
  22. at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:495)
  23. at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
  24. at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)
  25. at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
  26. at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
  27. at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
  28. at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
  29. at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
  30. at org.apache.catalina.core.StandardService.start(StandardService.java:516)
  31. at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
  32. at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
  33. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  34. at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  35. at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  36. at java.lang.reflect.Method.invoke(Method.java:597)
  37. at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
  38. at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
  39. 2010-3-1 22:26:44 org.apache.catalina.core.StandardContext start
  40. 严重: Error filterStart

严重: Exception starting filter struts2
java.lang.NullPointerException
at 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:49)
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
严重: Error filterStart

经过google一搜，有说将<constant name="struts.devMode" value="true" />中的值改为false的，我要的就是true，改成false不违背了我本意，后来经过多次查找发现有人说这个属于struts2.1的bug，tomcat目录不能有空格。我仔细一瞧我的tomcat路径，还真出现空格的。。。

最后通过自己修改路径发现此方法可行。

时间： 2024-08-25 11:36:48

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