Ireport

[lucashard]

No me levanta el jasperviewer, el codigo es el siguiente

try{
Map parametros = new HashMap();
String filename = "C:\\Users\\lvalle\\Desktop\\Magnum\\report1.jaspe r";
String filepdf = "C:\\Users\\lvalle\\Desktop\\Magnum\\report1.p df";

Conexion conn=new Conexion();
conn.conectar();
parametros.put("apellido", "Biffi");
JasperPrint print =JasperFillManager.fillReport(filename,parametros, conn.get_conexion());

JasperExportManager.exportReportToPdfFile(print,fi lepdf);
//JasperViewer.viewReport(print,false);
JasperViewer viewer = new JasperViewer(print, false);

viewer.setTitle("titulo del reporte");
viewer.setAlwaysOnTop(true);
viewer.show();
}
catch(Exception e)
{
System.out.println(e.getMessage());
}

y de error me da esto
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/commons/digester/Rule