Problemas com o iReport

JSPREPORT_FILES2= (String)request.getRealPath("/") + "relatorios\relat.jrxml";JasperReport relatorio = JasperCompileManager.compileReport(JSPREPORT_FILES);

PDF_FILES = "Nome_do_relatorio".pdf"
JasperPrint impressao = JasperFillManager.fillReport(relatorio, parametros, con);
strPDFFileName = (String)request.getRealPath("/")+"relatorios/"+PDF_FILES;

package gui;

import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.view.*;
import java.util.*;
import dao.OrcamentoHibernateDAO;
import dao.TaxasHibernateDAO;
import entity.Orcamentos;
import entity.Taxas;

/*
 * ImprimeOrcamento.java
 *
 * Created on 7 de Junho de 2007, 10:46
 */

/**
 *
 * @author  Tércio
 */
public class ImprimeOrcamento extends javax.swing.JFrame {
	
	private static final String layout = "/jasper/ImprimeOrcamento.jasper";
	Calendar cal = new GregorianCalendar();
    
    /** Creates new form ImprimeOrcamento */
    public ImprimeOrcamento() {
        initComponents();
    }
    
    public ImprimeOrcamento(Orcamentos orcamento) throws Exception{
        
    	OrcamentoHibernateDAO dao = new OrcamentoHibernateDAO();
		TaxasHibernateDAO dao1 = new TaxasHibernateDAO();
		
		List resultado = dao1.consultarTaxas2(orcamento);
		if(resultado.size() == 0) {
			Taxas taxa = new Taxas();
			taxa.setCodigo("");
			taxa.setServico("");
			resultado.add(taxa);
		}
			
		
		 String dia = new Integer(cal.get(Calendar.DAY_OF_MONTH)).toString();
	     String mes = new Integer(cal.get(Calendar.MONTH)+1).toString();
	     String ano = new Integer(cal.get(Calendar.YEAR)).toString();
		
		Map parametros = new HashMap(); 
		parametros.put("nome", orcamento.getNome());        
        parametros.put("data", dia+"/"+mes+"/"+ano);
        parametros.put("nome", orcamento.getNome());
        parametros.put("placa", orcamento.getPlaca());
        parametros.put("renavam", orcamento.getRenavam());
        parametros.put("chassi", orcamento.getChassi());
        parametros.put("fone", orcamento.getFone());
        parametros.put("orcamentoPara", orcamento.getDescricao());
        parametros.put("validade", orcamento.getValidade());
        parametros.put("pagamento", orcamento.getPagamento());
        parametros.put("obs", orcamento.getObs());
        parametros.put("total", orcamento.getValor());
        parametros.put("descontos", orcamento.getDesconto());
        parametros.put("geral", orcamento.getTotal());
        
		JasperPrint impressao = JasperFillManager.fillReport(
				getClass().getResourceAsStream(layout), parametros, new JRBeanCollectionDataSource(resultado));

		JasperViewer viewer = new JasperViewer(impressao, true);
		viewer.setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
		viewer.show();		
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                          
    private void initComponents() {
    	
     }// </editor-fold>                        
     
     /**
      * @param args the command line arguments
      */
     public static void main(String args[]) {
    	 new ImprimeOrcamento();
     }
     
}