java Struts2 在拦截器里的跳转问题

三叶草

java.lang.IllegalStateException 
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:405) 
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:725) 
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) 
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:467) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96) 
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) 
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) 
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) 
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) 
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 
at java.lang.Thread.run(Thread.java:595)

网上一查，是说页面两次调用了response.sendRedirect()方法，在后面加了一个return null 后，问题成功解决。

因此想，应该在页面跳转时如果报同类型的异常，应该可以用同种方法解决。