201906G104/DeleteServlet.java

package com.it.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.it.service.CourseService;
import com.it.service.DisciplineService;
import com.it.service.impl.CourseServiceImpl;
import com.it.service.impl.DisciplineServiceImpl;

/**
 * Servlet implementation class DeleteServlet
 */
public class DeleteServlet extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		request.setCharacterEncoding("UTF-8");
		
		try {
			String name = request.getParameter("name");
			String level = name.substring(name.length()-2, name.length());
			name = name.substring(0, name.length() - 2);
			
			if(level.equals("ds"))
			{
				DisciplineService disciplineService = new DisciplineServiceImpl();
				disciplineService.delete(name);
				CourseService courseService = new CourseServiceImpl();
				courseService.deleteByDiscipline(name);
			}else if(level.equals("cs")){
				CourseService courseService = new CourseServiceImpl();
				courseService.delete(name);
			}
			
			request.getRequestDispatcher("DisciplineListServlet").forward(request, response);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}