用jsf2打开报告？

-1

我试图打开在jasperreports/ireport中创建的报告。该报告位于包br.com.ferpasys.reports。我想用查看器打开这个报告。寻找一些解决方案，我发现许多建议使用JasperViewer或IcePDF。用jsf2打开报告？

当我尝试打开报告抛出的异常。

异常

1100: getOutputStream() has already been called for this response 
java.lang.IllegalStateException: getOutputStream() has already been called for this response 
    at org.apache.catalina.connector.Response.getWriter(Response.java:548) 
    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:212) 
    at com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:834) 
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:1169) 
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:390) 
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) 
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655) 
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523) 
    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)

这里我怎样，我想

public void imprimeRelatorio(){ 
     try{ 
      String pathFile = "/br/com/ferpasys/reports/RelatorioTexte.jrxml"; 
      FacesContext context = FacesContext.getCurrentInstance(); 
      HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse(); 
      ServletOutputStream responseStream = response.getOutputStream(); 
      InputStream file = getClass().getClassLoader().getResourceAsStream(pathFile); 

      JasperReport pathReport = JasperCompileManager.compileReport(file); 
      JasperPrint preencher = JasperFillManager.fillReport(pathReport, null,new JRBeanCollectionDataSource(getUnidades())); 
      JasperExportManager.exportReportToPdfStream(preencher,responseStream); 
      JasperViewer.viewReport(preencher, false); 
      responseStream.flush(); 
      responseStream.close(); 
      context.renderResponse(); 
      context.responseComplete(); 
     }catch(IOException e){ 
      e.printStackTrace(); 
     } catch (JRException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     }  

    }

来源

2014-09-03 FernandoPaiva

@BalusC感谢您的关注。你知道我如何在JasperReports中使用IcePDF在浏览器中打开我的报告？ – FernandoPaiva 2014-09-04 13:05:39

没有兄弟，我不会忽视你的评论，谢谢你的关注。我解决了这个问题，问题出在文件路径上。现在，我需要在任何查看器中打开此报告。在JasperViewer中打开，但在其他窗口或浏览器选项卡中打开。再次感谢。！ – FernandoPaiva 2014-09-04 16:58:19

不要使用jasper viewer for web应用程序，它是桌面组件 – 2017-01-18 20:29:40

我认为下面的代码引起的问题。

JasperExportManager.exportReportToPdfStream(preencher,responseStream); 
JasperViewer.viewReport(preencher, false);

由于preencher这是JasperPrint对象已经受到responseStream占用，JasperViewer不能因为preencher使用有作为显示它。

我建议你制作preencher的副本，并在将PDF导出到流时以及在JasperViewer中显示时使用不同的副本。

或者从上面删除其中一个导出，然后重试。

来源

2014-09-04 05:22:19

感谢您的关注。你知道我如何在JasperReports中使用IcePDF在浏览器中打开我的报告？ – FernandoPaiva 2014-09-04 13:02:57

您将不需要IcePDF在浏览器中查看您的pdf。 JasperReport为你做到了这一点。 – 2014-09-04 13:16:18

是的，用JasperViewer !!!但jasperviewer在其他窗口或标签中打开，并始终打开最小化。我如何才能使用JasperViewer只在stayOnTop我的浏览器打开，并打开最小化？ – FernandoPaiva 2014-09-04 14:25:32

用jsf2打开报告？

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