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，我已经从＆＃34; https://github.com/leleuj/cas-oauth-demo-3.5.x下载了演示应用程序。＆＃34;（客户端演示）。并将其部署在tomcat7中，但在使用Google帐户进行身份验证时会抛出异常。我试图编写另一个提供程序并且身份验证没问题，但无法重定向到我原来的网页。
以下是错误消息。有没有人熟悉CAS Oauth？期待你的回答，谢谢。
{＆＃34;失败＆＃34;：＆＃34; true＆＃34;，＆＃34; exception.message＆＃34;：＆＃34; org.springframework.webflow.execution.ActionExecutionException：异常抛出执行org.jasig.cas.support.oauth.web.flow.OAuthAction@1077092在州＆＃39; oauthAction＆＃39;流程＆＃39;登录＆＃39; - 动作执行属性是＆＃39; map [[empty]]＆＃39;＆＃34;，＆＃34; exception.stacktrace＆＃34;：＆＃34; org.springframework.webflow.execution.ActionExecutionException：在州＆＃39; oauthAction＆＃39;执行org.jasig.cas.support.oauth.web.flow.OAuthAction@1077092执行异常抛出流程＆＃39;登录＆＃39; - 动作执行属性是＆＃39; map [[empty]]＆＃39; \ 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 \ or ord.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.FlowEx ecutorImpl.launchExecution（FlowExecutorImpl.java:140）\ r \ n \ tat org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle（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.apac he.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）\ r \ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）\ r \ n \ tat \ or ord.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.invoke（AccessLogValve.java:927）\ r \ n \ tat org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118) \ r \ n \ 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 $ AbstractConnectionHan dler.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.nCaused by：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.execute（AbstractAction.java:188）\ r \ n \ tat org.springframework.webflow.execution.ActionExecutor.execute（ActionExecutor.java:51）\ r \ n \ t ...还有45个\ r \ n＆＃34;}