额 一不小心又一个多月没有写过随笔了。
这次是在某次启动服务器的时候报错了：
1 严重: Exception starting filter struts2 2 Unable to load configuration. - action - file:/D:/JAVAEE/apache-tomcat-7.0.57/webapps/bbs/WEB-INF/classes/struts.xml:15:72 3 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:428) 4 at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69) 5 at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51) 6 at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279) 7 at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260) 8 at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105) 9 at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4830) 10 at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5510) 11 at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 12 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) 13 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) 14 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649) 15 at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1245) 16 at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1895) 17 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 18 at java.util.concurrent.FutureTask.run(FutureTask.java:262) 19 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 20 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 21 at java.lang.Thread.run(Thread.java:744) 22 Caused by: Unable to load configuration. - action - file:/D:/JAVAEE/apache-tomcat-7.0.57/webapps/bbs/WEB-INF/classes/struts.xml:15:72 23 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69) 24 at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371) 25 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415) 26 ... 18 more 27 Caused by: Action class [UserAction] not found - action - file:/D:/JAVAEE/apache-tomcat-7.0.57/webapps/bbs/WEB-INF/classes/struts.xml:15:72 28 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:420) 29 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:365) 30 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:479) 31 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:275) 32 at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111) 33 at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:204) 34 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66) 35 ... 20 more
但是我并没有动过配置文件的这个部分啊，怎么会报错呢。
检查了之后发现配置文件配置无误，那就只能是缺少什么jar了。
确实在之前把手动整合的框架换成了用MyEclipse添加三种框架，然后用反向工程生成了entity和dao，少写了好多代码。
但是为了在jsp中使用struts的标签，我就把MyEclipse引用的jar删除了自己考了jar到lib里。
果然是少考了一个struts2-spring-plugin-2.3.20。
好吧缺jar还会这样报错。