src/com/ischoolbar/programmer/servlet/SelectedCourseServlet.java

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package com.ischoolbar.programmer.servlet;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.ischoolbar.programmer.dao.CourseDao;
import com.ischoolbar.programmer.dao.SelectedCourseDao;
import com.ischoolbar.programmer.model.Course;
import com.ischoolbar.programmer.model.Page;
import com.ischoolbar.programmer.model.SelectedCourse;
import com.ischoolbar.programmer.model.Student;

public class SelectedCourseServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 7120913402001186955L;

	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String method = request.getParameter("method");
		if("toSelectedCourseListView".equals(method)){
			try {
				request.getRequestDispatcher("view/selectedCourseList.jsp").forward(request, response);
			} catch (ServletException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}else if("AddSelectedCourse".equals(method)){
			addSelectedCourse(request,response);
		}else if("SelectedCourseList".equals(method)){
			getSelectedCourseList(request,response);
		}else if("DeleteSelectedCourse".equals(method)){
			deleteSelectedCourse(request,response);
		}
	}
	private void deleteSelectedCourse(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// TODO Auto-generated method stub
		int id = Integer.parseInt(request.getParameter("id"));
		SelectedCourseDao selectedCourseDao = new SelectedCourseDao();
		SelectedCourse selectedCourse = selectedCourseDao.getSelectedCourse(id);
		String msg = "success";
		if(selectedCourse == null){
			msg = "not found";
			response.getWriter().write(msg);
			selectedCourseDao.closeCon();