Java tutorial
/* * 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 com.sielpe.controller; import com.sielpe.facade.FachadaDAO; import com.sielpe.factory.FactoryDTO; import com.sielpe.model.Candidato; import com.sielpe.model.Eleccion; import com.sielpe.utility.Conexion; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.sql.Connection; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.Iterator; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author Nico */ public class GestionarCandidatos extends HttpServlet { FachadaDAO facadeDAO; FactoryDTO dtoFactory; Connection conexion; /** * 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("text/html;charset=UTF-8"); try { response.setContentType("text/html;charset=UTF-8"); request.setCharacterEncoding("UTF-8"); conexion = Conexion.getInstance(); facadeDAO = new FachadaDAO(); dtoFactory = new FactoryDTO(); ListarCandidatos(request, response); } catch (Exception ex) { response.sendRedirect("GestionarCandidatos?msg=" + ex.getMessage()); } } /** * peticion listar Elecciones * * @param request * @param response * @throws IOException * @throws ServletException */ public void ListarCandidatos(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { if (request.getQueryString() == null || request.getParameter("msg") != null) { ArrayList<Candidato> listaCandidatos = (ArrayList) facadeDAO.listarCandidatos(); request.setAttribute("listCandidatos", listaCandidatos); request.getRequestDispatcher("GestionCandidatos.jsp").forward(request, response); } else { redireccionNuevoCandidato(request, response); } } /** * peticion redireccion a nuevo candidato * * @param request * @param response * @throws IOException * @throws ServletException * @throws MiExcepcion */ public void redireccionNuevoCandidato(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { if (request.getParameter("add") != null) { ArrayList<Eleccion> eleccionesVigentes = (ArrayList) facadeDAO.eleccionesVigentes(); request.setAttribute("eleccionesVigentes", eleccionesVigentes); request.getRequestDispatcher("nuevoCandidato.jsp").forward(request, response); } else { nuevoCandidato(request, response); } } /** * peticion crear nuevo candidato * * @param request * @param response * @throws IOException * @throws MiExcepcion * @throws ServletException */ public void nuevoCandidato(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { if (request.getParameter("new") != null) { String respuesta = ""; byte[] bytes = null; try { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); Date fecha = format.parse(request.getParameter("fechaCandidato")); respuesta = facadeDAO.crearCandidato(dtoFactory.crearCandidato(request.getParameter("idCandidato"), request.getParameter("generoCandidato"), fecha, request.getParameter("nombreCandidato"), Integer.parseInt(request.getParameter("listaCandidato")), Integer.parseInt(request.getParameter("eleccionCandidato")), bytes)); } catch (ParseException ex) { respuesta = ex.getMessage(); } response.sendRedirect("GestionarCandidatos?msg=" + respuesta); } else { guardarFoto(request, response); } } /** * peticion crear nuevo candidato * * @param request * @param response * @throws IOException * @throws MiExcepcion * @throws ServletException */ public void guardarFoto(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { if (request.getParameter("saveImage") != null) { String respuesta = ""; String id = request.getParameter("saveImage"); byte[] bytes = null; try { //procesando foto DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload sfu = new ServletFileUpload(factory); List items = sfu.parseRequest(request); Iterator iter = items.iterator(); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (!item.isFormField()) { bytes = item.get(); } } respuesta = facadeDAO.fotoCandidato(bytes, id); } catch (FileUploadException ex) { respuesta = ex.getMessage(); } response.sendRedirect("GestionarCandidatos?msg=" + respuesta); } else { redirectEditarCandidato(request, response); } } /** * peticion redireccionar editar usuario * * @param request * @param response * @throws IOException * @throws MiExcepcion * @throws ServletException */ public void redirectEditarCandidato(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { if (request.getParameter("id") != null) { int id = Integer.parseInt(request.getParameter("id")); Candidato us = facadeDAO.detallesCandidato(id); request.setAttribute("candidato", us); ArrayList<Eleccion> eleccionesVigentes = (ArrayList) facadeDAO.eleccionesVigentes(); request.setAttribute("eleccionesVigentes", eleccionesVigentes); request.getRequestDispatcher("editarCandidato.jsp").forward(request, response); } else { actualizarUsuario(request, response); } } /** * peticion para actualizar un usuario * * @param request * @param response * @throws IOException * @throws MiExcepcion */ public void actualizarUsuario(HttpServletRequest request, HttpServletResponse response) throws IOException { String respuesta = ""; if (request.getParameter("edit") != null) { byte[] bytes = null; try { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); Date fecha = format.parse(request.getParameter("fechaCandidato")); respuesta = facadeDAO.editarCandidato(dtoFactory.crearCandidato(request.getParameter("idCandidato"), request.getParameter("generoCandidato"), fecha, request.getParameter("nombreCandidato"), Integer.parseInt(request.getParameter("listaCandidato")), Integer.parseInt(request.getParameter("eleccionCandidato")), bytes)); response.sendRedirect("GestionarCandidatos?&msg=" + respuesta); } catch (ParseException ex) { respuesta = ex.getMessage(); } } else { response.sendRedirect("GestionarCandidatos"); } } // <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> }