LogoutServlet.java

package net.slipp.user.web;

import java.io.IOException;

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

@WebServlet("/users/logout")
public class LogoutServlet extends HttpServlet {
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session = req.getSession();
		session.removeAttribute("userId");
		response.sendRedirect("/");
	}
}