我正在尝试将 CAS 集成到我们的 Web 应用程序中以通过 OAuth 2.0 进行身份验证，并且我已经从“ https://github.com/leleuj/cas-oauth-demo-3.5.x ”下载了演示应用程序。（客户端演示） . 并将其部署在tomcat7中，但是使用Google帐户进行身份验证时会引发异常。我尝试编写另一个提供程序并且身份验证正常，但无法重定向到我的原始网页。
下面是错误信息。有人熟悉 CAS Oauth 吗？期待您的回答，谢谢。
{"failure":"true","exception.message":"org.springframework.webflow.execution.ActionExecutionException: 异常抛出执行 org.jasig.cas.support.oauth.web.flow.OAuthAction@1077092 在状态 'oauthAction ' 流 'login' -- 动作执行属性是 'map[[empty]]'","exception.stacktrace":"org.springframework.webflow.execution.ActionExecutionException: 执行 org.jasig.cas.support 时抛出异常。 oauth.web.flow.OAuthAction@1077092 处于流 'login' 的状态 'oauthAction' - 动作执行属性是 'map[[empty]]'\r\n\tat org.springframework.webflow.execution.ActionExecutor.execute (ActionExecutor.java:60)\r\n\tat org.springframework.webflow.action.EvaluateAction.doExecute(EvaluateAction.java:77)\r\n\tat org.springframework。webflow.action.AbstractAction.execute(AbstractAction.java:188)\r\n\tat org.springframework.webflow.execution.AnnotatedAction.execute(AnnotatedAction.java:145)\r\n\tat org.springframework.webflow。 execution.ActionExecutor.execute(ActionExecutor.java:51)\r\n\tat org.springframework.webflow.engine.ActionState.doEnter(ActionState.java:101)\r\n\tat org.springframework.webflow.engine。 State.enter(State.java:194)\r\n\tat org.springframework.webflow.engine.Flow.start(Flow.java:535)\r\n\tat org.springframework.webflow.engine.impl。 FlowExecutionImpl.start(FlowExecutionImpl.java:366)\r\n\tat org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:225)\r\n\tat org.springframework.webflow.executor。 FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:140)\r\n\tat org.springframework.webflow.mvc.servlet.FlowHandlerAdapter。句柄（FlowHandlerAdapter.java:193）\r\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:923）\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService（ DispatcherServlet.java:852)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet. java:778)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:621)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:722)\r \n\tat org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody2(SafeDispatcherServlet.java:128)\r\n\tat org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody3$advice(SafeDispatcherServlet.java: 57)\r\n\tat org.jasig.cas.web.init.SafeDispatcherServlet.service(SafeDispatcherServlet.java:1)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) \r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)\r \n\tat org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)\r\n\tat org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)\r\n \tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)\r\n\tat com.github。inspektr.common.web.ClientInfoThreadLocalFilter.doFilter(ClientInfoThreadLocalFilter.java:63)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)\r\n\tat org.apache。 catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)\r\n\tat org.apache.catalina。 core.StandardContextValve.invoke(StandardContextValve.java:169)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)\r\n\tat org.apache.catalina.core。 StandardHostValve.invoke(StandardHostValve.java:168)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)\r\n\tat org.apache.catalina.valves.AccessLogValve。调用（AccessLogValve.java:927）\r\n\tat org.apache.catalina。core.StandardEngineValve.invoke(StandardEngineValve.java:118)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)\r\n\tat org.apache.coyote.http11。 AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)\r\n\tat org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)\r\n\tat org.apache.tomcat.util.net。 JioEndpoint$SocketProcessor.run(JIoEndpoint.java:307)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)\r\n\tat java.util.concurrent.ThreadPoolExecutor$ Worker.run(ThreadPoolExecutor.java:908)\r\n\tat java.lang.Thread.run(Thread.java:662)\r\n原因：java.lang.NullPointerException\r\n\tat org.jasig .cas.support.oauth.web.flow.OAuthAction.doExecute(OAuthAction.java:93)\r\n\tat org.springframework.webflow.action.AbstractAction。执行(AbstractAction.java:188)\r\n\tat org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51)\r\n\t... 45 更多\r\n"}