登录页面的下次自动登录

1.jsp页面

 <%
     String name ="";
     String pwd="";
     String checked="";
     Cookie[] cookies = request.getCookies();
     if(cookies != null && cookies.length >0){
         for(Cookie cookie : cookies){
             if("name".equals(cookie.getName())){
                 name=cookie.getValue();
                 checked="checked";
             }
             if("pwd".equals(cookie.getName())){
                 pwd = cookie.getValue();
             }
         }
     }
 
  %>


<input name="rem_u"  type="checkbox" id="rem_u" value="rem_u"  <%=checked %> />
           <span for="rem_u">下次自动登录</span>

2.后台代码

        // 把用户名,密码添加到cookie
        Cookie nameCookie = new Cookie("name",name);
        Cookie pwdCookie = new Cookie("pwd",pwd);
        nameCookie.setPath(request.getContextPath()+"/");//设置Cookie的保存路径
        pwdCookie.setPath(request.getContextPath()+"/");
        
        String rem_u =request.getParameter("rem_u");//下次自动登录的checkbox
        if(rem_u == null){
            nameCookie.setMaxAge(0);//删除Cookie
            pwdCookie.setMaxAge(0);
        }else{
            nameCookie.setMaxAge(7*24*60*60);
            pwdCookie.setMaxAge(7*24*60*60);
        }
        response.addCookie(nameCookie);//写入Cookie
        response.addCookie(pwdCookie);