title: Send pdf jasper straight to the printer in web app
body: <p>I need to send a pdf jasper directly to the printer, the current code PDF is delegated to the browser and therefore the user can print as many copies as desired. Must allow only print one copy, so I thought I'd send directly to printing.
  I searched the forum but did not understand what would be the best solution to the issue.</p>
  
  <p>Take a look at my code:</p>
  
  <pre><code>public class UtilRelatorios {
  
  public static void imprimeRelatorio(String relatorioNome,
          HashMap parametros) throws IOException, JRException {
          FacesContext fc = FacesContext.getCurrentInstance();
          ServletContext context = (ServletContext) fc.getExternalContext().getContext();
          HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
          JasperPrint jasperPrint = 
                  JasperFillManager.fillReport(
                          context.getRealPath("/relatorios")+ File.separator+relatorioNome+".jasper",
                          parametros);    
          //int finalPag = jasperPrint.getPages().size();
          //System.out.println("page: "+finalPag);
          //JasperPrintManager.printPage(jasperPrint,finalPag,false);
          byte[] b = null;
          //JasperPrintManager.printPage(jasperPrint, 0, false);
  
          try {
              b = JasperExportManager.exportReportToPdf(jasperPrint);
  
          } catch (Exception e) {
              e.printStackTrace();
          } finally {
          }    
  
              if (b != null &amp;&amp; b.length &gt; 0) {
                  // Envia o relatório em formato PDF para o browser
                  response.setContentType("application/pdf");
                  int codigo = (int) (Math.random()*1000);
                  response.setHeader("Content-disposition","inline);filename=relatorio_"+codigo+".pdf");
                  response.setContentLength(b.length);
                  ServletOutputStream ouputStream = response.getOutputStream();
                  ouputStream.write(b, 0, b.length);
                  ouputStream.flush();
                  ouputStream.close();
              }   
   }
  </code></pre>
  
  <p>}</p>