Untitled

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/*
 * 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.
 */
/**
 *
 * @author Gianluca
 */
public class InserisciVinoServlet extends HttpServlet {

    protected void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException {
        res.setContentType("text/html");
        int id = 0;
        int successo = 0;
        Connection connection = null;
        Statement statement = null;
        String url = "jdbc:mysql://localhost:3306/enoteca";
        PrintWriter pw = res.getWriter();
        String nome = req.getParameter("nome");
        String produttore = req.getParameter("produttore");
        try {
            int anno = Integer.parseInt(req.getParameter("anno"));
            double prezzo = Double.parseDouble(req.getParameter("prezzo"));
            String query = "INSERT into vino VALUES" + "('" + id + "', '" + nome + "', '" + produttore + "', '" + anno + "', '" + prezzo + "');";
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            connection = (com.mysql.jdbc.Connection) DriverManager.getConnection(url, "root", "");
            statement = (com.mysql.jdbc.Statement) connection.createStatement();
            successo = statement.executeUpdate(query);

            pw.println("<html>");
            pw.println("<head>");
            pw.println("<title>Aggiunta avvenuta</title>");
            pw.println("</head>");
            pw.println("<body>");
            pw.println("<div>Aggiunta avvenuta con successso</div>");
            pw.println("<a href='http://apocaliss92.ddns.net/enoteca_home.html'>Torna alla Home</a>");
            pw.println("</body>");
            pw.println("</html>");
            statement.close();
            connection.close();
        } catch (NumberFormatException ex) {
            pw.println("<html>");
            pw.println("<head>");
            pw.println("<title>Errore</title>");
            pw.println("</head>");
            pw.println("<body>");
            pw.println("<div>Aggiunta fallita</div>");
            pw.println("<div>Anno deve contenere un valore intero a 4 cifre e prezzo un valore numerico</div>");
            pw.println("<a href='http://apocaliss92.ddns.net/enoteca_home.html'>Torna alla Home</a>");
            pw.println("</body>");
            pw.println("</html>");
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(InserisciVinoServlet.class.getName()).log(Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            Logger.getLogger(InserisciVinoServlet.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            Logger.getLogger(InserisciVinoServlet.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(InserisciVinoServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}