about jasperreport export pdf doc

[qingwu wang]

Hello Everyone!,I compose jsp file as following,but it displays one blank page,any one can help me?I am appreciate for any replies!
I want to view my report by webapp.

<%@ page errorPage="error.jsp" %>
<%@ page import="datasource.*" %>
<%@ page import="dori.jasper.engine.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@ page import="dori.jasper.engine.data.*"%>
<%@ page import="dori.jasper.engine.export.*"%>
<%@ page import="dori.jasper.engine.util.*"%>
<%@ page import="dori.jasper.view.*"%>
<%@ page import="java.sql.*"%>
<%=application.getRealPath("/reports/WebappReport.jasper")%>
<%
try
{
String driver = "oracle.jdbc.driver.OracleDriver";
Class.forName(driver);
String connectString = "jdbc :-o racle:thin:@dbserver:1521 :-o rcl";
String user = "hpdemo";
String password = "hpdemo";
Connection conn = DriverManager.getConnection(connectString, user, password);
File reportFile = new File(application.getRealPath("/reports/WebappReport.jasper"));
String path = reportFile.getAbsolutePath(); //tried getAbsolutePath()
//System.out.println("Absolute Path = " + reportFile.getAbsolutePath());
Map parameters = new HashMap();
parameters.put("myparam",new Integer(2));
parameters.put("ReportTitle", "Address Report");
parameters.put("BaseDir", reportFile.getParentFile());
JasperPrint jasperPrint = JasperManager.fillReport ( path,parameters, conn);
byte[] bytes = JasperRunManager.runReportToPdf(reportFile.getPath(), parameters, conn);
JRPdfExporter exporter = new JRPdfExporter();
ByteArrayOutputStream pdfReport = new ByteArrayOutputStream();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, pdfReport);
exporter.setParameter(JRExporterParameter.OUTPUT_FILE, application.getRealPath("/reports/WebappReport.jasper"));
exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "WebappReport.pdf");
exporter.exportReport();
bytes = pdfReport.toByteArray();
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
OutputStream ouputStream = response.getOutputStream();
ouputStream.write(bytes, 0, bytes.length);
ouputStream.flush();
ouputStream.close();
}
catch(Exception e)
{e.printStackTrace();}
%>

[qingwu wang]

I have resolved it..

[Eva Me]

Can u post the solution?
Thanks u
Best regards!