servlet Para JASPER REPORT

------------------------------------------index----------------------------------------------------- <input type="button" class="button_text" value="PDF" onClick=" window.location.href='servlet' "></input> -------------------------------------------Servlet------------------------------------------------------- /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package logica; import java.io.IOException; import java.io.PrintWriter; import java.net.URL; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.jasperreports.engine.JRExporter; import net.sf.jasperreports.engine.JRExporterParameter; import net.sf.jasperreports.engine.JasperFillManager; import net.sf.jasperreports.engine.JasperPrint; import net.sf.jasperreports.engine.JasperReport; import net.sf.jasperreports.engine.export.JRPdfExporter; import net.sf.jasperreports.engine.util.JRLoader; /** * * @author sysadmin */ @WebServlet(name = "servlet", urlPatterns = {"/servlet"}) public class servlet extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("application/pdf"); clsConexion con = new clsConexion(); con.conectarBD(); ServletOutputStream out = response.getOutputStream(); try { JasperReport reporte; URL in = this.getClass().getResource("/reportes/report1.jasper"); reporte = (JasperReport) JRLoader.loadObject(in); Map parametros = new HashMap(); JasperPrint jasperPrint = JasperFillManager.fillReport(reporte, parametros, con.getConexion()); JRExporter exporter = new JRPdfExporter(); exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out); exporter.exportReport(); } catch (Exception e) { e.printStackTrace(); } } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP * <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP * <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }