严重: Exception starting filter struts2

Unable to load configuration. - action - file:/C:/Users/Xiejdm/Workspaces/MyEclipse%20Professional%202014/.metadata/.me_tcat7/webapps/0719StrutsCRUD/WEB-INF/classes/struts.xml:24:86

    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.ng.InitOperations.initDispatcher(InitOperations.java:69)

    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:48)

    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277)

    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)

    at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)

    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)

    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650)

    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)

    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)

    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)

    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)

    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)

    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)

    at java.util.concurrent.FutureTask.run(FutureTask.java:262)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

    at java.lang.Thread.run(Thread.java:744)

Caused by: Error building results for action userinfo in namespace /UserEntity - action - file:/C:/Users/Xiejdm/Workspaces/MyEclipse%20Professional%202014/.metadata/.me_tcat7/webapps/0719StrutsCRUD/WEB-INF/classes/struts.xml:24:86

    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:366)

    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:460)

    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:265)

    at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)

    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:189)

    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)

    ... 21 more

Caused by: There is no result type defined for type 'json' mapped with name 'success'.  Did you mean 'json'? - result - file:/C:/Users/Xiejdm/Workspaces/MyEclipse%20Professional%202014/.metadata/.me_tcat7/webapps/0719StrutsCRUD/WEB-INF/classes/struts.xml:25:24

    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:613)

    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:364)

    ... 26 more