转发[关闭]后，已经为此响应调用了Spring引导错误getOutputStream（）

我目前正在开发一个Spring Boot应用程序 . 我为httpBasic身份验证实现了Spring Boot安全性 . 身份验证成功后，我的自定义Filter Method会被调用 .

protected void onSuccessfulAuthentication(javax.servlet.http.HttpServletRequest request,
        javax.servlet.http.HttpServletResponse response, Authentication authResult) throws IOException {
Iterator<? extends GrantedAuthority> it = authResult.getAuthorities().iterator();
        switch (it.next().getAuthority()) {
        case (MyConstants.ROLE_USER): {
            try {
                request.getRequestDispatcher("/user/data").forward(request, response);  break;
        } catch (ServletException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

所以我想将我需要的JSON数据的rquest对象转发到我的RestController endpoints . 这很有效 . 在我的控制器中，我想返回带有数据和Http状态代码的ResponseEntity .

@RequestMapping(value="/upload", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity< HttpStatus> upload(@RequestBody String uploadData){

    ResponseEntity<String> httpStatus = sendExchangeToRestApi(MediaType.APPLICATION_JSON, uploadData,
            "http://localhost:8080/upload", HttpMethod.PUT);
    return new ResponseEntity<String>("Test". HttpStatus.OK);

}

我用Postman测试了这个 . 输出正常，所以我得到状态200和我的身体输出测试 . 但我遇到以下错误：

servlet [dispatcherServlet]的Servlet.service（）在路径[]的上下文中引发了异常[java.lang.IllegalStateException：getOutputStream（）已经为此响应调用]具有根本原因java.lang.IllegalStateException：getOutputStream（）具有已经在org.apache.catalina.connector.Response.getWriter（Response.java:582）的org.apache.catalina.connector.ResponseFacade.getWriter（ResponseFacade.java:227）的javax.servlet.ServletResponseWrapper上调用此响应.getWriter（ServletResponseWrapper.java:109）在javax.servlet.ServletResponseWrapper.getWriter（ServletResponseWrapper.java:109）的javax.servlet.ServletResponseWrapper.getWriter（ServletResponseWrapper.java:109）at org.springframework.security.web.util . OnCommittedResponseWrapper.getWriter（OnCommittedResponseWrapper.java:149）位于org.springframework.security.web.util.OnCommittedResponseWrapper.getWriter（OnCommittedResponseWrappe）的javax.servlet.ServletResponseWrapper.getWriter（ServletResponseWrapper.java:109） r.java:149）org.apache.jache上的org.apache.jasper.runtime.JspWriterImpl.initOut（JspWriterImpl.java:115）org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:108） .runtime.PageContextImpl.release（PageContextImpl.java:172）org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext（JspFactoryImpl.java:120）org.apache.jasper.runtime.JspFactoryImpl.releasePageContext（JspFactoryImpl.java:75 ）org.apache.jsp.view.login_jsp._jspService（login_jsp.java:171）at org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:70）at javax.servlet.http.HttpServlet.service（ HttpServlet.java:741）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:458）位于org.apache.jasper的org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:386）位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFi）的javax.servlet.http.HttpServlet.service（HttpServlet.java:741）中的.servlet.JspServlet.service（JspServlet.java:330） lterChain.java:231）org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）位于org.apache.catalina的org.apache.catalina.core.ApplicationDispatcher.invoke（ApplicationDispatcher.java:712）位于org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel（InternalResourceView.java）的org.apache.catalina.core.ApplicationDispatcher.include（ApplicationDispatcher.java:516）中的.core.ApplicationDispatcher.doInclude（ApplicationDispatcher.java:580） ：162）org.springframework.web.servlet.view.AbstractView.render（AbstractView.java:316）atg.springframework.web.servlet.DispatcherServ . servlet.DispatcherServlet.processDispatchResult（DispatcherServlet.java:1116）位于org.springframework.web.servis.Datpatcher.vat上的org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:1055）（DispatcherServlet.java：942）在org.springframework.web.servlet.Frame org.springframework上的javax.servlet.http.HttpServlet.service（HttpServlet.java:634）中的org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:890）中的workServlet.processRequest（FrameworkServlet.java:998）位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）的javax.servlet.http.HttpServlet.service（HttpServlet.java:741）中的.web.servlet.FrameworkServlet.service（FrameworkServlet.java:875）在org.apache.catalina.core.AppacheFatter . ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal（BasicAuthenticationFilter.java： 215）在org.springframework.web.filter.OncePerRequestFi lter.doFilter（OncePerRequestFilter.java:107）org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）at org .springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal（HttpTraceFilter.java:90）atorg.apringframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）org.apache.catalina.core.ApplicationFilterChain.doFilter（ ApplicationFilterChain.java:166）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:320）在org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke（FilterSecurityInterceptor.java:127）在org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter（FilterSecurityInterceptor.java:91）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）在org.springframework.security .web.access.ExceptionTranslationFilter.doFilter（ExceptionTranslationFilter.java:119）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）在org.springframework.securi ty.web.session.SessionManagementFilter.doFilter（SessionManagementFilter.java:137）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）在org.springframework.security.web.authentication.AnonymousAuthenticationFilter . org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）中的doFilter（AnonymousAuthenticationFilter.java:111）位于org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter（SecurityContextHolderAwareRequestFilter.java:170）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）在org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:63）在org.springframework.security.web在org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterIntern上的.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334） org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）的al（BasicAuthenticationFilter.java:215）org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）at org位于org.springframework.security.web.FilterChainProxy的org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）中的.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal（BasicAuthenticationFilter.java:215）位于org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java）的org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:200）中的$ VirtualFilterChain.doFilter（FilterChainProxy.java:334） ：334）org.springframework.security.web.authentication.logout.LogoutFilter.doFilter（LogoutFilter.java:116）org.springframework.security.web.FilterChainProxy $ VirtualFi lterChain.doFilter（FilterChainProxy.java:334）org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal（HeaderWriterFilter.java:66）org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在Org.springframework.security.web上的org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:105） .FlterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334）位于org.springframework.web.filter.OncePerRequestFilter.doFilter的org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal（WebAsyncManagerIntegrationFilter.java:56） （OncePerRequestFilter.java:107）位于org.springframework.security.web.FilterChainProxy.d的org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:334） . 位于org.springframework的org.springframework.security.web.FilterChainProxy.doFilter（FilterChainProxy.java:178）的oFilterInternal（FilterChainProxy.java:215）org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:357）位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）的.web.filter.DelegatingFilterProxy.doFilter（DelegatingFilterProxy.java:270）位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java） ：166）在org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:99）在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在org.apache.catalina.core . ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）at atorg.springframework.web.filter.FormContentFilter.doFilterInternal（FormContentFilter.java:92）org.apringframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ ApplicationFilterChain.java:193）org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）atg.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal（HiddenHttpMethodFilter.java:93）org.springframework.web .filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166） ）在在org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMet org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics（WebMvcMetricsFilter.java:154） rics（WebMvcMetricsFilter.java:122）org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal（WebMvcMetricsFilter.java:107）org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java： 107）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.springframework.web.filter.CharacterEncodingFilter .doFilterInternal（CharacterEncodingFilter.java:200）org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）at org . apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:199）在org.apache.catalina.core.StandardContextValve.invoke（StandardCont extValve.java:96）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:490）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:139）在org.apache.catalina .valves.ErrorReportValve.invoke（ErrorReportValve.java:92）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:74）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:343 ）在org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:408）在org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）在org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（ AbstractProtocol.java:770）org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1415）org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49） at java.util.concurrent.ThreadPoolExecutor.runWorker（Unknown Source）at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）at org .apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）at java.lang.Thread.run（Unknown Source）

所以似乎多次调用getOutputStream（）/ getWriter（），但我不知道为什么 .