cookie的删除

package day01.cookies;

import java.io.IOException;

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

public class CookieDemo02 extends HttpServlet {

	private static final long serialVersionUID = 2691008160310371013L;

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		// 当有效时间为0的时候，就是删除同名的cookie，提交一个同名的cookie进行覆盖
		// 并且因为有效时间为0，所以覆盖了之后，就消失了，达到了消除的效果
		Cookie c = new Cookie("stu_name", "abc");
		c.setMaxAge(0);
		
		response.addCookie(c);
		System.out.println("删除成功！");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		
	}

}