Connexion.java

package controleur;

import Metier.Principale;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Connexion extends HttpServlet {
    
    public static final String VUE_CONNEXION = "/Connexion.jsp";
    public static final String VUE_ACCUEIL = "/Accueil.jsp";
    public static final String CHAMP_LOGIN = "login";
    public static final String CHAMP_MDP = "mdp";
    public static final String ATT_ERREURS  = "erreurs";
    public static final String ATT_RESULTAT = "resultat";
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        /* Affichage de la page de connection */
        this.getServletContext().getRequestDispatcher(this.VUE_CONNEXION).forward( request, response );
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        /* Création ou récupération de la session */
        HttpSession session = request.getSession();
        
        String resultat;
        boolean isConnected = true;
        boolean erreurs = false;
        
        /* Récupération des champs du formulaire. */
        String login = request.getParameter(this.CHAMP_LOGIN);
        String mdp = request.getParameter(this.CHAMP_MDP);
        
        Principale controleur = Metier.MetierFactory.getPrincipale();
        
        /* Verification des champs du formulaire  */
        if(!controleur.connexion(login, mdp)){
            isConnected = false;
            erreurs = true;
        }
        
        /* Initialisation du résultat global de la connection */
        if(!erreurs){
            resultat = "<div class=\"alert alert-success alert-dismissable\">\n" +
                        "  <button type=\"button\" class=\"close\" data-dismiss=\"alert\" aria-hidden=\"true\">×</button>\n" +
                        "  <strong>Felicitation !</strong> Vous êtes connecté.\n" +
                        "</div>";
            
            request.setAttribute(this.ATT_RESULTAT, resultat);
            session.setAttribute( "connexion", isConnected );
            this.getServletContext().getRequestDispatcher(this.VUE_ACCUEIL).forward( request, response );
        } else {
            resultat = "<div class=\"alert alert-warning alert-dismissable\">\n" +
                        "  <button type=\"button\" class=\"close\" data-dismiss=\"alert\" aria-hidden=\"true\">×</button>\n" +
                        "  <strong>Attention !</strong> Identifiants incorrect\n" +
                        "</div>";
            
            request.setAttribute(this.ATT_RESULTAT, resultat);
            this.getServletContext().getRequestDispatcher(this.VUE_CONNEXION).forward( request, response );
        }
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}