SubirArchivoServlet.subirarchivo.java Source code

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/*
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 * and open the template in the editor.
 */
package SubirArchivoServlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
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 org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 *
 * @author gonza
 */
@WebServlet(name = "subirarchivo", urlPatterns = { "/subirarchivo" })
public class subirarchivo extends HttpServlet {
    private String dir, nombre;

    /**
     * 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 (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet subirarchivo</title>");
            out.println("</head>");
            out.println("<body>");

            dir = getServletContext().getRealPath("/SubirArchivoServlet/img");
            out.println(dir + "<br>");

            if (ServletFileUpload.isMultipartContent(request)) {

                FileItemFactory factory = new DiskFileItemFactory();

                ServletFileUpload upload = new ServletFileUpload(factory);

                upload.setSizeMax(5000 * 1024); // bytes

                List listUploadFiles = null;
                FileItem item = null;

                try {
                    listUploadFiles = upload.parseRequest(request);

                    Iterator it = listUploadFiles.iterator();
                    while (it.hasNext()) {
                        item = (FileItem) it.next();
                        if (!item.isFormField()) {
                            if (item.getSize() > 0) {
                                nombre = item.getName();

                                File archivo = new File(dir, nombre);

                                item.write(archivo);
                                if (archivo.exists()) {
                                    out.println("GUARDADO " + archivo.getAbsolutePath() + "</p>");
                                } else {
                                    // nunca se llega a ejecutar
                                    out.println(
                                            "FALLO AL GUARDAR. NO EXISTE " + archivo.getAbsolutePath() + "</p>");
                                }

                            }
                        } else {
                            // es un campo de formulario, podemos obtener clave y valor
                            String key = item.getFieldName();
                            String valor = item.getString();
                            out.println(key + ": " + valor + "<br>");
                        }
                    }

                } catch (FileUploadException e) {
                    out.println("Demasiado grande! <br>");
                    e.printStackTrace();
                } catch (Exception e) {
                    out.println("Ha ocurrido un error! <br>");
                    e.printStackTrace();
                }
            }
            out.println("<img src='/Servlet1/SubirArchivoServlet/img/" + nombre + "'>");
            out.println("<p><a href='index.html'>Ir al Inicio</a></p>");
            out.println("</body>");
            out.println("</html>");
            out.close();
        }
    }

    // <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>

}