dengpeng Posted October 27, 2006 Share Posted October 27, 2006 public class Test2 extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ServletOutputStream servletOutputStream = response.getOutputStream(); InputStream reportStream = getServletConfig().getServletContext() .getResourceAsStream("/reports/FirstReport.jasper"); try { System.out.println("Done!");// JasperPrintManager.printReport(reportStream,true); JasperPrintManager.printReportToPdfStream(reportStream,servletOutputStream); System.out.println("end!"); } catch (Exception e) { } } } why this method is error ?JasperPrintManager.printReport(reportStream,true); the error message:java.lang.ClassCastException at net.sf.jasperreports.engine.JasperPrintManager.printReport(JasperPrintManager.java:225) at net.ensode.jasperbook.TestPrint.doGet(TestPrint.java:51) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:534) Link to comment Share on other sites More sharing options...
dengpeng Posted October 27, 2006 Author Share Posted October 27, 2006 my msn: eclipsehibernate@hotmail.comthanks a lot Link to comment Share on other sites More sharing options...
Teodor Danciu Posted November 1, 2006 Share Posted November 1, 2006 Hi, You get this error because you are trying to print a report template (*.jasper file) and not a generated document (*.jrprint file).A report template has to be filled with data to produce a document that you can then print or export to other formats.You need to go through the docs a little. The samples should also help. Thank you,Teodor Link to comment Share on other sites More sharing options...
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