imageServlet.java Source code

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Here is the source code for imageServlet.java
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/*
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import java.io.File;
import static java.io.FileDescriptor.out;
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;
import static org.apache.taglibs.standard.tag.common.core.OutSupport.out;
import javax.servlet.GenericServlet;
import javax.servlet.ServletContext;
import utilityClasses.StudyDB;

/**
 *
 * @author Arun
 */
@WebServlet(urlPatterns = { "/imageServlet" })
public class imageServlet 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");
        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 imageServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet imageServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <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 {
        String name = "";
        String value = "";
        String imageurl = "";
        String path = "";
        try {
            String ImageFile = "";
            String itemName = "";

            boolean isMultipart = ServletFileUpload.isMultipartContent(request);
            if (!isMultipart) {
            } else {
                FileItemFactory factory = new DiskFileItemFactory();
                ServletFileUpload upload = new ServletFileUpload(factory);
                List items = null;
                try {
                    items = upload.parseRequest(request);
                } catch (FileUploadException e) {
                    System.out.println("Exception in upload");
                    e.getMessage();
                }

                Iterator itr = items.iterator();
                while (itr.hasNext()) {
                    FileItem item = (FileItem) itr.next();
                    if (item.isFormField()) {
                        name = item.getFieldName();
                        value = item.getString();
                        if (name.equals("ImageFile")) {
                            ImageFile = value;
                        }

                    } else {
                        try {

                            itemName = item.getName();
                            File savedFile = new File(
                                    this.getServletContext().getRealPath("/") + "images\\" + itemName);
                            File image = new File(request.getParameter("ImageFile"));
                            path = "/images/";
                            name = itemName;
                            item.write(savedFile);
                        } catch (Exception e) {
                            System.out.println("Error" + e.getMessage());
                        }
                    }
                }
                try {
                    int image = StudyDB.uploadImage("/images/" + itemName);
                    imageurl = StudyDB.retrieveImage();

                } catch (Exception el) {
                    System.out.println("Inserting error" + el.getMessage());
                }
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        String URL = "/displayImage.jsp";
        String message = "Success";
        request.setAttribute("message", message);
        request.setAttribute("imageurl", imageurl);
        getServletContext().getRequestDispatcher(URL).forward(request, response);

    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}