用jsf2打开报告?
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();
}
}
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。
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
@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