the problem about Struts1.2

Question

我也遇到过,不知道什么原因.
不过,我是用Eclipse3.1+tomcat5.0.28+oracle的.
我的解决方案是:把Eclipse的对于项目的配置文件(即工作空间下的.metadata文件夹)删去.然后再在工作空间内重新新建一个tomcat项目(与原来项目名一样),这样原来的项目又可以运行了.而且刚才的那个问题也没有了.
现在如果有谁知道具体什么原因的话,那就更好了.

Answer 1

我的QQ 9256216 
 weblogic的数据源配置好了，
 struts中的 data-source的type属性怎么填写呢 
 很多地方说 用BasicDataSources等 但是 也不行 
  可是在部署的时候出现了问题 
<2007-1-3 下午03时32分00秒 CST> <Error> <HTTP> <BEA-101216> <Servlet: "action" failed to preload on startup in Web application: "ch12.war".
javax.servlet.UnavailableException: Initializing application data source noitceDS
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionServlet.java:812)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:335)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:276)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
Truncated. see log file for complete stacktrace
> 
2007-1-3 15:32:00 org.apache.struts.action.ActionServlet initModuleDataSources
严重: Initializing application data source noitceDS
java.lang.ClassNotFoundException: 
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:222)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:195)
at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:54)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:130)
at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:35)
at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:117)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:143)
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionServlet.java:805)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:335)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:276)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:68)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:493)
at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1688)
at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1665)
at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1585)
at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2678)
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:874)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:326)
at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:114)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:25)
at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:640)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:252)
at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:567)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:131)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:101)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:329)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:845)
at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1246)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:432)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67)
at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:179)

Answer 2

It seems you have lost one jar file

Answer 3

到http://jakarta.apache.org/commons/pool/downloads.html去下载一个你需要的版本的
commons-pool-x.x.jar放到WEB-INF\lib里面去，如果是war，用winrar拖进去，然后重新发布