Cookie對象的使用

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 {
		// 設置編碼格式
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		
		// 獲取登錄的用戶名和密碼，記住密碼框的值
		String name = request.getParameter("account");
		String pass = request.getParameter("pass");
		String chk = request.getParameter("chk");
		// 判斷是否勾選記住密碼
		if(chk!=null) {
			// 把輸入用戶名和密碼存儲到cookie對象中
			Cookie ckName = new Cookie("name", name);
			Cookie ckPass = new Cookie("pass", pass);
			// 設置存儲記住密碼狀態的Cookie
			Cookie ckChk = new Cookie("checked", "checked");
			// 設置cookie有效時間
			ckName.setMaxAge(24*60*60);
			ckPass.setMaxAge(24*60*60);
			ckChk.setMaxAge(24*60*60);
			// 設置Cookie訪問
			ckName.setPath("/");
			ckPass.setPath("/");
			ckChk.setPath("/");
			// 把cookie對象添加到響應對象中
			response.addCookie(ckName);
			response.addCookie(ckPass);
			response.addCookie(ckChk);
		} else { // 沒有勾選記住密碼
			// 把輸入用戶名和密碼存儲到cookie對象中
			Cookie ckName = new Cookie("name", name);
			Cookie ckPass = new Cookie("pass", pass);
			// 設置存儲記住密碼狀態的Cookie
			Cookie ckChk = new Cookie("checked", "unchecked");
			// 設置cookie有效時間
			ckName.setMaxAge(0);
			ckPass.setMaxAge(0);
			ckChk.setMaxAge(0);
			// 設置Cookie訪問
			ckName.setPath("/");
			ckPass.setPath("/");
			ckChk.setPath("/");
			// 把cookie對象添加到響應對象中
			response.addCookie(ckName);
			response.addCookie(ckPass);
			response.addCookie(ckChk);
		}
	}

}