将用户名保存至cookie中

<input id="remember" name="remember" type="checkbox" value="remember-me">记住我

if ("remember-me".equals(remember)) {
       rememberMe(username, password, resp);
}

/**
     * 将用户名和密码存放到cookie中
     * @param username
     * @param password
     * @param response
     */
    private void rememberMe(String username,String password,HttpServletResponse response){
        Cookie user = new Cookie("user",username+"-"+password);
        user.setMaxAge(1*60*60*24*7);//生命周期为一星期
        response.addCookie(user);
    }

<%
    if(request.getAttribute("user")==null){//如果user不为空，说明是第一次登录用户名或密码输错，后台设置的user值
        String username = null;
        String password = null;
        Cookie[] cookies = request.getCookies();
        for(int i=0;cookies!=null && i<cookies.length;i++){
            if(cookies[i].getName().equals("user")){
                username = cookies[i].getValue().split("-")[0];
                password = cookies[i].getValue().split("-")[1];
            }
        }
        if(username==null){
            username = "";
        }
        if(password==null){
            password = "";
        }
        pageContext.setAttribute("user", new User(username,password));
    }
%>