[標題]:[轉]Struts2.1.6 - Unable to load configuration
[時間]:2009-7-7
[摘要]:Unable to load configuration. - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
[關鍵字]:struts、spring、configuration、struts-default、MVC、Apache，框架、SSH
[環境]:Struts2.1.6、JDK6、Tomcat6
[作者]:Winty (wintys@gmail.com) http://www.aygfsteel.com/wintys
[錯誤]:
在Web Project中加入了以下5個Struts2核心jar:
struts2-core-2.1.6.jar
xwork-2.1.2.jar
freemarker-2.3.13.jar
ognl-2.6.11.jar
commons-logging-1.0.4.jar
啟動Tomcat時，提示如下錯誤信息:
2009-7-7 19:55:12 org.apache.catalina.core.StandardContext filterStart
嚴重: Exception starting filter MyStruts2
Unable to load configuration. - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)
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:3693)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:761)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:741)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1023)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1015)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:448)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
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)
Caused by: Unable to load bean: type:com.opensymphony.xwork2.UnknownHandler class:org.apache.struts2.convention.ConventionUnknownHandler - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:222)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:165)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
... 30 more
Caused by: Bean type interface com.opensymphony.xwork2.UnknownHandler with the name default has already been loaded by bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-codebehind-plugin-2.1.6.jar!/struts-plugin.xml:29:122 - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:206)
... 33 more
2009-7-7 19:58:07 org.apache.catalina.core.StandardContext filterStart
嚴重: Exception starting filter MyStruts2
Unable to load configuration. - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)
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:3693)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1105)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1203)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1307)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1580)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1560)
at java.lang.Thread.run(Thread.java:619)
Caused by: Unable to load bean: type:com.opensymphony.xwork2.UnknownHandler class:org.apache.struts2.convention.ConventionUnknownHandler - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:222)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:165)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
... 17 more
Caused by: Bean type interface com.opensymphony.xwork2.UnknownHandler with the name default has already been loaded by bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-codebehind-plugin-2.1.6.jar!/struts-plugin.xml:29:122 - bean - jar:file:/F:/Web/homesite/jsp/struts/WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml:30:119
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:206)
... 20 more
[原因&解決]:
這是apache的失誤。按照官方文檔說明，運行Struts2必須加載5個核心jar包，也就是咱們一開始拷貝的5個jar包，如果你用的是 Struts2之前的版本是沒有問題的，但是如果去下載這個新版本，就會報如上錯誤，因為還需要加載另外兩個jar包，可是官方的說明文檔沒有更新。
解決方案：在Struts2的解壓縮文件夾內的lib文件夾里， 我們找到下列2個jar : commons-fileupload-1.2.1.jar、commons-io-1.3.2.jar，把他們復制到項目根目錄下的"WEB-INF"lib"文件夾內。
既然少了jar，圖省事把包struts lib下的jar全都復制到工程目錄中。這樣做又會出現類似上面的錯誤提示。所以如非必要，不要加載其它的jar，這大概是struts2.1.6的bug。一般只需加載以下7個jar:
struts2-core-2.1.6.jar、
xwork-2.1.2.jar、
freemarker-2.3.13.jar、
ognl-2.6.11.jar、
commons-logging-1.0.4.jar、
commons-fileupload-1.2.1.jar、
commons-io-1.3.2.jar
還有"葉現一"(http://blog.csdn.net/yexianyi/)提供的辦法:將struts-2.1.6-all.zip中apps文件夾中struts2-blank-2.1.6.war文件解壓。進入struts2-blank-2.1.6"WEB-INF"lib，只將該文件夾下的9個jar包導入到項目工程中即可，
其余的包如果沒有用到切不可輕易導入。
[參考資料]:
[1] 嚴重 exception starting filter struts2 unable to load configuration : http://blog.csdn.net/cocohufei/archive/2009/05/13/4176058.aspx
[2] struts2.1.6簡單的實例加載struts-default.xml的問題 : http://topic.csdn.net/u/20090212/14/4648539f-e6c1-4a1b-94b9-944712affa96.html
[3] Struts2.x異常- Unable to load configuration..../WEB-INF/lib/struts2-convention-plugin-2.1.6.jar!/struts-plugin.xml : http://blog.csdn.net/yexianyi/archive/2009/02/18/3905836.aspx
[4] struts 2.1.6 "Unable to load configuration"異常 : http://blog.csdn.net/thirdprince/archive/2009/04/06/4052027.aspx
posted on 2009-07-07 23:16
天堂露珠 閱讀(2110)
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