cookie的操作

来源：互联网发布：虚拟蓝牙适配器软件编辑：程序博客网时间：2024/06/03 13:52

/** * 读取所有cookie * 注意二、从客户端读取Cookie时，包括maxAge在内的其他属性都是不可读的，也不会被提交。浏览器提交Cookie时只会提交name与value属性。maxAge属性只被浏览器用来判断Cookie是否过期 * @param request * @param response */@RequestMapping("/showCookies")public void showCookies(HttpServletRequest request,HttpServletResponse response ){Cookie[] cookies = request.getCookies();//这样便可以获取一个cookie数组if (null==cookies) {System.out.println("没有cookie=========");} else {for(Cookie cookie : cookies){    System.out.println("name:"+cookie.getName()+",value:"+ cookie.getValue());}}}/** * 添加cookie * @param response * @param name * @param value */@RequestMapping("/addCookie")public void addCookie(HttpServletResponse response,String name,String value){Cookie cookie = new Cookie(name.trim(), value.trim());cookie.setMaxAge(30 * 60);// 设置为30mincookie.setPath("/");System.out.println("已添加===============");response.addCookie(cookie);}/** * 修改cookie * @param request * @param response * @param name * @param value * 注意一、修改、删除Cookie时，新建的Cookie除value、maxAge之外的所有属性，例如name、path、domain等，都要与原Cookie完全一样。否则，浏览器将视为两个不同的Cookie不予覆盖，导致修改、删除失败。 */@RequestMapping("/editCookie")public void editCookie(HttpServletRequest request,HttpServletResponse response,String name,String value){Cookie[] cookies = request.getCookies();if (null==cookies) {System.out.println("没有cookie==============");} else {for(Cookie cookie : cookies){if(cookie.getName().equals(name)){System.out.println("原值为:"+cookie.getValue());cookie.setValue(value);cookie.setPath("/");cookie.setMaxAge(30 * 60);// 设置为30minSystem.out.println("被修改的cookie名字为:"+cookie.getName()+",新值为:"+cookie.getValue());response.addCookie(cookie);break;}}}}/** * 删除cookie * @param request * @param response * @param name */@RequestMapping("/delCookie")public void delCookie(HttpServletRequest request,HttpServletResponse response,String name){Cookie[] cookies = request.getCookies();if (null==cookies) {System.out.println("没有cookie==============");} else {for(Cookie cookie : cookies){if(cookie.getName().equals(name)){cookie.setValue(null);cookie.setMaxAge(0);// 立即销毁cookiecookie.setPath("/");System.out.println("被删除的cookie名字为:"+cookie.getName());response.addCookie(cookie);break;}}}}

通常开发时先用以下的代码将获取的cookie进行封装

/** * 根据名字获取cookie * @param request * @param name cookie名字 * @return */public  Cookie getCookieByName(HttpServletRequest request,String name){    Map<String,Cookie> cookieMap = ReadCookieMap(request);    if(cookieMap.containsKey(name)){        Cookie cookie = (Cookie)cookieMap.get(name);        return cookie;    }else{        return null;    }   }   /** * 将cookie封装到Map里面 * @param request * @return */private  Map<String,Cookie> ReadCookieMap(HttpServletRequest request){      Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();    Cookie[] cookies = request.getCookies();    if(null!=cookies){        for(Cookie cookie : cookies){            cookieMap.put(cookie.getName(), cookie);        }    }    return cookieMap;}

0 0