LogoutServlet.java

package cn.lnu.session;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
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public class LogoutServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session=request.getSession(false);
		if(session==null){
			response.sendRedirect("/TestServletHTTP_Cookie_Session/index.jsp");
			return;
		}
		session.removeAttribute("user");
		response.sendRedirect("/TestServletHTTP_Cookie_Session/index.jsp");
	}

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

	}

}