Cookie对象的使用

package com.web.servlet;

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;

/**
 * Servlet implementation class LoginSer
 */
public class LoginSer extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginSer() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// 设置编码格式
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		
		// 获取登录的用户名和密码，记住密码框的值
		String name = request.getParameter("account");
		String pass = request.getParameter("pass");
		String chk = request.getParameter("chk");
		// 判断是否勾选记住密码
		if(chk!=null) {
			// 把输入用户名和密码存储到cookie对象中
			Cookie ckName = new Cookie("name", name);
			Cookie ckPass = new Cookie("pass", pass);
			// 设置存储记住密码状态的Cookie
			Cookie ckChk = new Cookie("checked", "checked");
			// 设置cookie有效时间
			ckName.setMaxAge(24*60*60);
			ckPass.setMaxAge(24*60*60);
			ckChk.setMaxAge(24*60*60);
			// 设置Cookie访问
			ckName.setPath("/");
			ckPass.setPath("/");
			ckChk.setPath("/");
			// 把cookie对象添加到响应对象中
			response.addCookie(ckName);
			response.addCookie(ckPass);
			response.addCookie(ckChk);
		} else { // 没有勾选记住密码
			// 把输入用户名和密码存储到cookie对象中
			Cookie ckName = new Cookie("name", name);
			Cookie ckPass = new Cookie("pass", pass);
			// 设置存储记住密码状态的Cookie
			Cookie ckChk = new Cookie("checked", "unchecked");
			// 设置cookie有效时间
			ckName.setMaxAge(0);
			ckPass.setMaxAge(0);
			ckChk.setMaxAge(0);
			// 设置Cookie访问
			ckName.setPath("/");
			ckPass.setPath("/");
			ckChk.setPath("/");
			// 把cookie对象添加到响应对象中
			response.addCookie(ckName);
			response.addCookie(ckPass);
			response.addCookie(ckChk);
		}
	}

}