Cookie保存用户名密码：10天之内记住密码无需输入

指定时间内无序输入账户密码，自动登录

jsp–Cookie控制代码

<% String username = null;
	       String pwd = null;
	       Cookie cookies[] = request.getCookies();
	       if(null != cookies){
		       for(Cookie cookie:cookies){
		           if(cookie.getName().equals("username")){
		               username = cookie.getValue();
		           }
		           if(cookie.getName().equals("pwd")){
		               pwd = cookie.getValue();
		           }
		       } 
	       }
	       if(username != null && pwd!=null){
		       request.getRequestDispatcher("LoginServlet?userName="+username+"&pwd="+pwd).forward(request, response);
	       }
 %>

jsp登录表单

    用户名：


    密码    ：


    自动登录:
			    每天都登录
			    10天登录
			    30天登录
		     
    


    

	    
	    
    
 							

2、对应的LoginServlet

     int dayLenth = 0;
        if (null != request.getParameter("timelength")) {
            dayLenth = Integer.valueOf(request.getParameter("timelength"));
            Cookie userNameCookie = new Cookie("username",
                request.getParameter("userName"));
            Cookie pwdCookie = new Cookie("pwd",
                    request.getParameter("pwd"));
            userNameCookie.setMaxAge(20);
            pwdCookie.setMaxAge(20);

            response.addCookie(userNameCookie);
            response.addCookie(pwdCookie);
        }
        request.getRequestDispatcher("main.jsp").forward(request, response);

查看自己当前客户端Cookie

谷歌浏览器：

1. 点击感叹号

2、查看详情