示例#1
0
 @Override
 public void destroy() {
   // TODO Auto-generated method stub
   try {
     con.close();
   } catch (SQLException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
   super.destroy();
 }
示例#2
0
  /** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    String[] courseids = request.getParameterValues("courses");
    // Saving the course ids as a session attribute (not necessary, might be better for saving)

    HttpSession session = request.getSession(true);
    session.setAttribute("courses", courseids);

    // Get course and time info for each id
    if (courseids == null) {

    } else {
      try {
        for (String id : courseids) {
          Integer courseid = Integer.parseInt(id);
          PreparedStatement getCourse =
              con.prepareStatement(
                  "SELECT title, department, number, section " + "FROM courses WHERE id=?;");
          getCourse.setInt(1, courseid);
          PreparedStatement getTime =
              con.prepareStatement(
                  "SELECT day, starttime, endtime FROM times " + "WHERE course_id=?;");
          getTime.setInt(1, courseid);
          ResultSet courseResult = getCourse.executeQuery();
          ResultSet timesResult = getTime.executeQuery();
          while (courseResult.next()) {
            // Generating the course from the DB, lets us utilize timeblocks
            Course course = new Course();
            course.setTitle(courseResult.getString("title"));
            course.setDepartment(courseResult.getString("department"));
            course.setNumber(courseResult.getString("number"));
            course.setSection(courseResult.getString("section"));
            String courseTitle =
                course.getDepartment()
                    + course.getNumber()
                    + "-"
                    + course.getSection()
                    + ": "
                    + course.getTitle();
            while (timesResult.next()) {
              course.addTime(
                  timesResult.getString("day").charAt(0),
                  timesResult.getInt("starttime"),
                  timesResult.getInt("endtime"));
            }

            // Now parse the timeshttp://ical4j.sourceforge.net/introduction.html for the timeblocks
            Map<String, Set<Character>> timeblocks = course.getTimeBlocks();
            for (String startend : timeblocks.keySet()) {
              String[] StartEnd = startend.split("-");
              Integer startInt = Integer.parseInt(StartEnd[0]);
              Integer endInt = Integer.parseInt(StartEnd[1]);
              java.util.Calendar startDate = this.getTimeCalendar(startInt);
              java.util.Calendar endDate = this.getTimeCalendar(endInt);
              DateTime startTime = new DateTime(startDate.getTime());
              DateTime endTime = new DateTime(endDate.getTime());

              VEvent courseEvent = new VEvent(startTime, endTime, courseTitle);
              Recur recur = new Recur(Recur.WEEKLY, null);
              // add the proper days to the recurrence
              for (char day : timeblocks.get(startend)) {
                recur.getDayList().add(dayMap.get(day));
              }
              courseEvent.getProperties().add(new RRule(recur));
              // Get unique identifier
              UidGenerator ug = new UidGenerator("uidGen");
              Uid uid = ug.generateUid();
              courseEvent.getProperties().add(uid);
              // Finally, add the time block to the calendar
              this.ical.getComponents().add(courseEvent);
            }
          }
        }
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
    // Time to handle file download
    try {
      // making the file and outputting the calendar info
      File file = new File("mycalendar.ics");
      int length = 0;
      FileOutputStream fout = new FileOutputStream(file);
      CalendarOutputter outputter = new CalendarOutputter();
      outputter.output(ical, fout);
      ServletOutputStream outStream = response.getOutputStream();
      response.setContentType("text/calendar");
      response.setContentLength((int) file.length());
      // sets HTTP header
      response.setHeader("Content-Disposition", "attachment; filename=calendar.ics");
      byte[] byteBuffer = new byte[BUFSIZE];
      DataInputStream in = new DataInputStream(new FileInputStream(file));

      // reads the file's bytes and writes them to the response stream
      while ((in != null) && ((length = in.read(byteBuffer)) != -1)) {
        outStream.write(byteBuffer, 0, length);
      }

      in.close();
      outStream.close();
    } catch (ValidationException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }