Struts2部署时出错：无法加载bean：类型：class：com.opensymphony.xwork2.ObjectFactory
我正在创建一个基本的 Struts2、Maven webApp，并在部署到 Tomcat 6 或 Jetty 时收到此错误。有人见过这个吗？
2010-07-29 15:33:38.801::WARN: failed struts2
Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/C:/workspaces/test/test/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:208)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:131)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
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.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:589)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:357)
at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:293)
at org.mortbay.jetty.plugin.Jetty6RunWar.execute(Jetty6RunWar.java:67)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
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:592)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.0.11.2.jar!/struts-default.xml:30:72 - bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:193)
... 47 more
使用 Maven...
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.1.8.1</version>
</dependency>
web.xml
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
看起来非常简单，我不明白为什么它无法加载。我遵循了基本教程。我用谷歌搜索了此错误消息，但找不到任何相关内容。
I'm creating a basic Struts2, Maven webApp and getting this error when I deploy to Tomcat 6 or Jetty. Has anyone seen this?
2010-07-29 15:33:38.801::WARN: failed struts2
Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/C:/workspaces/test/test/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:208)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:131)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
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.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:589)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:357)
at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:293)
at org.mortbay.jetty.plugin.Jetty6RunWar.execute(Jetty6RunWar.java:67)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
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:592)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.0.11.2.jar!/struts-default.xml:30:72 - bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:193)
... 47 more
Using Maven...
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.1.8.1</version>
</dependency>
web.xml
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Look's pretty straight forward, I don't understand why it won't load. I followed the basic tutorial. I googled for this error message, and was unable to find anything relevant.
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评论（5）
如果您阅读堆栈跟踪，您的问题实际上非常清楚：
您有一个
struts2-core-2.0.11.2.jar的副本 和struts2- 的副本core-2.1.8.1.jar在您的WEB-INF/lib目录中。我认为你应该只拥有其中之一。进行一些清理（运行mvn clean可能就足够了）。PS：我不知道为什么你也有来自
C:/workspace/test的东西，如第一行所示：你的类路径肯定有一些奇怪和混乱的东西。除了上面给出的解释之外，我没有任何解释。
Your problem is actually quite clear if you read the stack trace:
You have a copy of
struts2-core-2.0.11.2.jarand a copy ofstruts2-core-2.1.8.1.jarin yourWEB-INF/libdirectories. I think you should only have one of them. Do some cleanup (running amvn cleanmight be enough).PS: I have no idea why you also have stuff coming from
C:/workspace/testas show be the first line:There is definitely something weird and messy with your classpath. I don't have any explanation beyond the one I gave above though.
同意上面的答案
检查您的库和类路径中是否有上述 jar 并修复它们
有时，即使在 IDE 中看不到这些 jar，它们也存在于构建文件中，因此需要修复类路径和 CLEAN AND BUILD 应该可以解决问题。
Agree with the above answer
Check your library and classpath for the above jars and fix them
Sometimes even if the jars are not seen in the IDE, they are present int the build files, So a fix of the classpath and a CLEAN AND BUILD should resolve the problem.
我认为 struts2-core-2.1.8.1.jar 副本或者您已将此 jar 文件包含在您的 web 应用程序中的某个位置，因此将其删除并继续
I think struts2-core-2.1.8.1.jar copy or you have included this jar file some where in your webapplication so remove it and continue
问题： Web 容器加载 2 个不同版本的文件时发生冲突
解决方案： 只需转到路径
计算机的
C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/并删除struts2-core-2.0.11.2.jar文件并仅保留最新的一份。如果这种类型的冲突也与其他一些文件发生，则也删除该文件在此之后，不会有任何例外。
Problem: The conflict occurred as 2 files of different versions are being loaded by the web container
Solution: Just go to path
C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/of your computer and delete thestruts2-core-2.0.11.2.jarfile and only keep the latest one. If this type of conflict also occurs with some other file then delete that file alsoAfter this no exception will be there.
我最近也遇到了这个问题。清理缓存并重建项目对于我的错误无效。
我尝试删除冲突的 struts-default.xml 文件，但没有找到它，并且 struts-default.xml 文件是只读文件，因此我无法修改它。
我最终的解决方案是把Project Structure--Modules--MyFirstProject（项目名）下多余的Web*去掉，只留下一个Web，并将Web Resource Directory修改为WebRoot。
这对我有用！希望我能帮助别人。
此处
I have also encountered this problem recently. Clean the cache and rebuild the project is not valid for my error.
I tried to delete the conflicting struts-default.xml file, but I didn't find it and the struts-default.xml file is a read-only file so I can't to modify it.
My final solution is to remove the extra Web* under Project Structure--Modules--MyFirstProject (project name), leaving only one Web and modifying Web Resource Directories as WebRoot.
It works for me! Hope I can help others.
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