Getimage

package servlet;

import java.io.IOException;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;

/**
 * Servlet implementation class Getimage
 */
@WebServlet("/Getimage")
public class Getimage extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Getimage() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Infoutente foto=new Infoutente();
        // mi serve per generare l'errore
        Newuser nw = new Newuser();
        HttpSession session = request.getSession();
        String connectionURL = "jdbc:mysql://localhost:3306/imagesharing";
        Connection connection = null;
        PreparedStatement statement=null;
        ResultSet rs=null;
        String query;
        int codfoto=0;
        String url=null;
        String datacaricamento=null;
        String didascalia=null;
        Integer codealbum=0;

            try {
                Class.forName("com.mysql.jdbc.Driver").newInstance();
            } catch (InstantiationException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


            try {
                connection = (Connection) DriverManager.getConnection(connectionURL , "root", "0000");
                    codealbum=Integer.parseInt(request.getParameter("album"));
                    foto.setCodupload(codealbum);
                    query="select * from foto,album where album.codalbum=foto.codalbum and album.codalbum=?";
                    statement=(PreparedStatement) connection.prepareStatement(query);
                    statement.setInt(1,codealbum);
                    rs = statement.executeQuery();


                while(rs.next()){
                    foto.setCodalbum(rs.getInt("codalbum"));
                    foto.setCodfoto(rs.getInt("codfoto"));
                    foto.setDatacaricamento(rs.getString("datacaricamento"));
                    foto.setDidascalia(rs.getString("didascalia"));
                    foto.setUrl(rs.getString("url"));
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            request.setAttribute("foto",foto);
            RequestDispatcher disp=request.getRequestDispatcher("slider.jsp");
            disp.forward(request, response);

            try {
                rs.close();
                statement.close();
                connection.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

    }
}