java.lang.IllegalStateException: Cannot forward after response has been committe

当发生在如下错误的时候，有一个方案可行，

"java.lang.IllegalStateException: Cannot forward after response has been committed “

当你有多个跳转的页面的语句时候，好好检查一下，当 转发 或者 重定向的时候，需要在后加一个retrun 即可。

服务器中不允许多次跳转，否则会下面这个错误。

因为服务器端使用sendRedirect跳转到客户端的时候,不能在使用req.getRequestDispatcher("跳转的页面").forward(req, reqs);

跳转;

所以在跳转之后，return就不会往下执行。

严重: Servlet.service() for servlet [jsp] in context with path [/TomcatSecurityValidte] threw exception
java.lang.IllegalStateException: Cannot forward after response has been committed
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:339)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
 at com.pack.security.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:39)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:582)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
 at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279)
 at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
 at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
 at java.lang.Thread.run(Thread.java:619)