public void ejecutarReporte(String codigo) {
    try {
      cn = Conexion.realizarConexion();
      String master = System.getProperty("user.dir") + "\\src\\reportes\\reporteEmpleado.jasper";
      System.out.println("master: " + master);
      if (master == null) {
        showMessageDialog(null, "No se encontro el archivo", "Error", 0);
        System.exit(2);
      }

      JasperReport masterReport = null;
      try {
        masterReport = (JasperReport) JRLoader.loadObject(master);
      } catch (JRException ex) {
        showMessageDialog(null, "MasterReport:" + ex.getMessage(), "Error", 0);
        System.exit(3);
      }

      Map parametro = new HashMap();
      parametro.put("chr_emplcodigo", codigo);

      JasperPrint jasperPrint = JasperFillManager.fillReport(masterReport, parametro, cn);

      JasperViewer jviewer = new JasperViewer(jasperPrint, false);
      jviewer.setTitle("Reporte");
      jviewer.setVisible(true);
    } catch (ClassNotFoundException ex) {
      showMessageDialog(null, ex.getMessage(), "Error", 0);
    } catch (SQLException ex) {
      showMessageDialog(null, ex.getMessage(), "Error", 0);
    } catch (Exception ex) {
      showMessageDialog(null, ex.getMessage(), "Error", 0);
    } finally {
      try {
        cn.close();
      } catch (Exception ex) {
        showMessageDialog(null, ex.getMessage(), "Error", 0);
      }
    }
  }