src/servlet/RemoveServlet.java

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package servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

public class RemoveServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public RemoveServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String teacher = request.getParameter("teacher");
		String student = request.getParameter("student");
		HttpSession session = request.getSession();
		PrintWriter pw = response.getWriter();
		if(teacher != null && !teacher.equals("")){
			session.removeAttribute("tlogin");
		}
		if(student != null && !student.equals("")){
			session.removeAttribute("slogin");
		}
		pw.write("<script>window.navigate('../index.jsp');</script>");
	}

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

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}