edu.morgan.server.UploadFileServlet.java Source code

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Here is the source code for edu.morgan.server.UploadFileServlet.java

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package edu.morgan.server;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

import javax.servlet.annotation.WebServlet;

import java.util.*;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import jxl.*;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import edu.morgan.server.student.IncompleteStudent;

/**
 *
 * @author pablohpsilva
 */
@WebServlet(name = "UploadFileServlet", urlPatterns = { "/UploadFileServlet" })
public class UploadFileServlet extends HttpServlet {

    private boolean isMultipart;
    private int maxFileSize = 50 * 1024;
    private int maxMemSize = 4 * 1024;

    /**
     * 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
     */

    @Override
    public void init() {
        // Get the file location where it would be stored.
    }

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {
        // Check that we have a file upload request
        RequestDispatcher rd;
        response.setContentType("text/html");

        isMultipart = ServletFileUpload.isMultipartContent(request);
        if (!isMultipart) {
            rd = request.getRequestDispatcher("fail.jsp");
            rd.forward(request, response);
        }

        try {
            ServletFileUpload upload = new ServletFileUpload();
            response.setContentType("text/plain");

            FileItemIterator iterator = upload.getItemIterator(request);
            while (iterator.hasNext()) {
                FileItemStream item = iterator.next();
                InputStream stream = item.openStream();
                this.read(stream);
            }

            rd = request.getRequestDispatcher("success.jsp");
            rd.forward(request, response);

        } catch (Exception ex) {
            throw new ServletException(ex);
        }

    }

    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {
        RequestDispatcher rd;
        rd = request.getRequestDispatcher("fail.jsp");
        rd.forward(request, response);
    }

    private void read(InputStream inputFile) throws IOException {

        Workbook w;
        try {
            w = Workbook.getWorkbook(inputFile);
            // Get the first sheet
            Sheet sheet = w.getSheet(0);
            // Loop over first 10 column and lines
            ArrayList<IncompleteStudent> studentList = new ArrayList<IncompleteStudent>();

            for (int j = 0; j < sheet.getColumns(); j++) {
                IncompleteStudent student = new IncompleteStudent();

                for (int i = 0; i < sheet.getRows(); i++) {
                    Cell identifier = sheet.getCell(j, 0);
                    String strIdentifier = identifier.getContents();

                    if (strIdentifier.toLowerCase().contains("first")
                            && strIdentifier.toLowerCase().contains("name")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setFirstName(cell.getContents());
                    } else if (strIdentifier.toLowerCase().contains("last")
                            && strIdentifier.toLowerCase().contains("name")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setLastName(cell.getContents());
                    } else if (strIdentifier.toLowerCase().contains("date")
                            && strIdentifier.toLowerCase().contains("birth")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setDateOfBirth(cell.getContents());
                    } else if (strIdentifier.toLowerCase().contains("id")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setId(cell.getContents());
                    } else if (strIdentifier.toLowerCase().contains("checklist")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setChecklist(cell.getContents());
                    } else if (strIdentifier.toLowerCase().contains("term")) {
                        Cell cell = sheet.getCell(j, i);
                        student.setTerm(cell.getContents());
                    }
                }
                studentList.add(student);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}