addsubmissionservlet.java

远程学生作业提交系统,所用技术JSP,Servelet,Ajax,Web Services,MySql

/*
 * AddSubmissionServlet.java
 *
 * Created on October 18, 2006, 11:49 PM
 */

package com.sixtwenty.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.ArrayList;
import java.util.*;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.encoding.XMLType;
import java.net.*;

import org.apache.commons.fileupload.*;
import org.apache.commons.*;
import org.apache.commons.fileupload.disk.*;
import org.apache.commons.fileupload.servlet.*;

import javax.xml.namespace.QName;
import javax.xml.rpc.ParameterMode;

import com.sixtwenty.SubmitFiles;
import com.sixtwenty.Submissions;
import com.sixtwenty.*;
/**
 *
 * @author Balasubramaniam
 * @version
 */
public class AddSubmissionServlet extends HttpServlet {

    //String endpoint = "http://172.23.96.22:8180/axis/com/sixtwenty";
    String endpoint = "http://localhost:8080/axis/services/submit";

    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException
    {
        doPost(request, response);
    }


    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException {
       response.setContentType("text/html");
       PrintWriter out = response.getWriter ();

       try {
           Submit submit = null;

           try {
               SubmitServiceLocator ssl = new SubmitServiceLocator();
               submit = ssl.getsubmit();
           } catch(Exception e) {
               throw new ServletException(e.toString());
           }

           // Get the type of action to do
           String action = new String(request.getParameter("action"));
           String ipAddress = (String)request.getSession().getAttribute("ipAddress");
           if (ipAddress == null) ipAddress = "Unknown";
           String username = (String)request.getSession().getAttribute("username");

           if (action.equals("submit")) {
                  String projId = new String(request.getParameter("projId"));
                  request.getSession().setAttribute("projId", projId);
                  RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/jsp/submitassignment.jsp");
                  requestDispatcher.forward(request, response);
                  return;
           }

           if (action.equals("save")) {
              String projectId = (String)request.getSession().getAttribute("projId");


              //Preparing to submit the file
              //File Upload processing
              FileUpload fup = new FileUpload();

              // Create a factory for disk-based file items
              FileItemFactory factory = new DiskFileItemFactory();

              // Create a new file upload handler
              ServletFileUpload upload = new ServletFileUpload(factory);

              // Parse the request
              List items = upload.parseRequest(request);

              // Process the uploaded items
              Iterator iter = items.iterator();
              while (iter.hasNext()) {
                       FileItem item = (FileItem) iter.next();

                       // Process a file upload
                       if (!item.isFormField()) {
                          String fieldName = item.getFieldName();
                          String fileName = item.getName();
                          String contentType = item.getContentType();
                          boolean isInMemory = item.isInMemory();
                          long sizeInBytes = item.getSize();

                          //throw new ServletException("fileName: " + fileName);

                          InputStream uploadedStream = item.getInputStream();
                          byte[] contents = new byte[(int)sizeInBytes];
                          uploadedStream.read(contents, 0, (int)sizeInBytes);

                          SubmitFiles sf = new SubmitFiles(contents, fileName, (int)sizeInBytes, username);

                          Vector<SubmitFiles> submitFiles = (Vector<SubmitFiles>)request.getSession().getAttribute("listOfSubmitFiles");

                          // If it is the first file we add
                          if (submitFiles == null) {
                              submitFiles = new Vector<SubmitFiles>();
                              submitFiles.addElement(sf);
                              request.getSession().setAttribute("listOfSubmitFiles", submitFiles);
                          } else {
                              submitFiles.addElement(sf);
                              request.getSession().setAttribute("listOfSubmitFiles", submitFiles);
                          }
                       }
                  }
                  RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/jsp/submitassignment.jsp");
                  requestDispatcher.forward(request, response);
                  return;
              }

              if (action.equals("complete")) {
                  String projId = (String)request.getSession().getAttribute("projId");

                  Vector<SubmitFiles> sflist = (Vector<SubmitFiles>)request.getSession().getAttribute("listOfSubmitFiles");

                  request.getSession().setAttribute("listOfSubmitFiles", new Vector<SubmitFiles>());

                  if (sflist != null) {
                      //throw new ServletException(sflist.elementAt(0).getFilename());
                      //SubmitFiles[] sub_files = ((SubmitFiles[])(sflist.toArray()));

                      SubmitFiles[] submitFilesArray = new SubmitFiles[sflist.size()];
                      for (int i=0; i < sflist.size(); i++) {
                          submitFilesArray[i] = new SubmitFiles();
                          submitFilesArray[i].setFileContents(sflist.elementAt(i).getFileContents());
                          submitFilesArray[i].setFilename(sflist.elementAt(i).getFilename());
                          submitFilesArray[i].setFileuser(sflist.elementAt(i).getFileuser());
                          submitFilesArray[i].setFilesize(sflist.elementAt(i).getFilesize());
                      }

                      java.util.Date date = new java.util.Date();
                      Calendar cal = Calendar.getInstance();
                      cal.setTime(date);
                      Submissions subs = new Submissions(submitFilesArray, "", ipAddress, submitFilesArray.length, cal, username);
                      //throw new ServletException("test");
                      submit.addSubmission(projId, subs, Calendar.getInstance());
                  }

                  RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/listOfProjects");
                  requestDispatcher.forward(request, response);
                  return;
              }
       } catch (Exception e) {
           out.println(e.toString());
       }
   }

     /** Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "This servlet is invoked to add submission";
    }

}