用jsf2打開報告？

-1

我試圖打開在jasperreports/ireport中創建的報告。該報告位於包br.com.ferpasys.reports。我想用查看器打開這個報告。尋找一些解決方案，我發現許多建議使用JasperViewer或IcePDF。用jsf2打開報告？

當我嘗試打開報告拋出的異常。

異常

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)

這裏我怎樣，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(); 
     }  

    }

來源

2014-09-03 FernandoPaiva

@BalusC感謝您的關注。你知道我如何在JasperReports中使用IcePDF在瀏覽器中打開我的報告？ – FernandoPaiva 2014-09-04 13:05:39

沒有兄弟，我不會忽視你的評論，謝謝你的關注。我解決了這個問題，問題出在文件路徑上。現在，我需要在任何查看器中打開此報告。在JasperViewer中打開，但在其他窗口或瀏覽器選項卡中打開。再次感謝。！ – FernandoPaiva 2014-09-04 16:58:19

不要使用jasper viewer for web應用程序，它是桌面組件 – 2017-01-18 20:29:40

我認爲下面的代碼引起的問題。

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

由於preencher這是JasperPrint對象已經受到responseStream佔用，JasperViewer不能因爲preencher使用有作爲顯示它。

我建議你製作preencher的副本，並在將PDF導出到流時以及在JasperViewer中顯示時使用不同的副本。

或者從上面刪除其中一個導出，然後重試。

來源

2014-09-04 05:22:19

感謝您的關注。你知道我如何在JasperReports中使用IcePDF在瀏覽器中打開我的報告？ – FernandoPaiva 2014-09-04 13:02:57

您將不需要IcePDF在瀏覽器中查看您的pdf。 JasperReport爲你做到了這一點。 – 2014-09-04 13:16:18

是的，用JasperViewer !!!但jasperviewer在其他窗口或標籤中打開，並始終打開最小化。我如何才能使用JasperViewer只在stayOnTop我的瀏覽器打開，並打開最小化？ – FernandoPaiva 2014-09-04 14:25:32

用jsf2打開報告？

回答

相關問題