DatasetUpload.java Source code

Introduction

Here is the source code for DatasetUpload.java

Source

/*
 * 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.
 */
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
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.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 *
 * @author Mershack
 */
@WebServlet(urlPatterns = { "/DatasetUpload" })
public class DatasetUpload extends HttpServlet {

    /**
     * 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");
        PrintWriter out = response.getWriter();
        try {

            //process only if its multipart content
            if (ServletFileUpload.isMultipartContent(request)) {
                try {
                    List<FileItem> multiparts = new ServletFileUpload(new DiskFileItemFactory())
                            .parseRequest(request);

                    String DatasetName = "";
                    for (FileItem item : multiparts) {
                        if (!item.isFormField()) {
                            DatasetName = new File(item.getName()).getName();
                            //write the file to disk
                            // item.write(new File(datasetFolder + File.separator + name));
                            //System.out.println("File name is :: " + name);  
                            // out.print("Upload successeful");
                        }
                    }

                    DatasetName = DatasetName.substring(0, DatasetName.indexOf("."));
                    // System.out.println(DatasetName + "*****");

                    String datasetFolderPath = getServletContext()
                            .getRealPath("datasets" + File.separator + DatasetName);

                    File datasetFolder = new File(datasetFolderPath);

                    //create the folder if it does not exist
                    if (!datasetFolder.exists()) {
                        datasetFolder.mkdir();
                    }

                    for (FileItem item : multiparts) {
                        if (!item.isFormField()) {
                            String name = new File(item.getName()).getName();
                            //write the file to disk
                            item.write(new File(datasetFolder + File.separator + name));
                            //System.out.println("File name is :: " + name);  
                            out.print("Upload successeful");
                        }
                    }
                } catch (Exception ex) {
                    out.print("File Upload Failed due to " + ex);
                }
            } else {
                out.print("The request did not include any file");
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            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>

}