Question

java.lang.IllegalStateException解决方法

org.apache.catalina.core.StandardWrapperValve invoke
致命的: サーブレット action のServlet.service()が例外を投げました
java.lang.IllegalStateException
at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:435)
at filter.SetCharacterEncodingFilter.forwardToLoginPage(SetCharacterEncodingFilter.java:223)
at filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:147)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Unknown Source)

现在报的这个错，不知道是哪个部分出问题了，帮帮我~~
谢谢大家了~~

Answer 1

出错原因：

可能多次调用了HttpServletResponse.sendRedirect(url) 方法。

Answer 2

不清楚