标签:session resp req Session cookie Cookie void
一、Cookie 1. 创建Cookie/** * 创建一个新的Cookie可同时创建多个 * @author: panther * @date: 2022/6/9 10:31 * @param: [req, resp] * @return: void **/ protected void createCookie(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 1.创建cookie对象 Cookie cookie = new Cookie("key","val"); resp.setContentType("text/html,CharSet=UTF-8"); //2. 通知客户端保存Cookie resp.addCookie(cookie); resp.getWriter().write("cookie创建成功"); }
2. 查找Cookie数组
/** * 获取Cookie和获取特定的cookie * @author: panther * @date: 2022/6/9 10:31 * @param: [req, resp] * @return: void **/ protected void getCookie(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Cookie[] cookies = req.getCookies(); for(Cookie cookie : cookies ){ resp.getWriter().write("cookies["+cookie.getName()+","+cookie.getValue()+"] <br/>"); } }
3. 修改Cookie的值
/** * 修改Cookie的值 * @author: panther * @date: 2022/6/9 10:32 * @param: [req, resp] * @return: void **/ protected void UpdateCookie(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Cookie cookie = new Cookie("key","newValue"); resp.addCookie(cookie); resp.getWriter().write("Cookie修改成功"); //方法二 Cookie cookie1 = FindCookie.find("key", req.getCookies()); if(cookie1 != null){ cookie1.setValue("newValue2"); } resp.getWriter().write("Cookie修改成功"); }
4.设置Cookie时长
/** * 设置Cookie的存活时长 * @author: panther * @date: 2022/6/9 23:59 * @param: [req, resp] * @return: void **/ protected void SetLife(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Cookie cookie = new Cookie("path","path"); cookie.setMaxAge(60*60);//一小时后超时 cookie.setMaxAge(-1);//关闭页面后失效 }
二、Session
1. 创建Session
/** * 创建session * @author: panther * @date: 2022/6/9 16:15 * @param: [req, resp] * @return: void **/ protected void createSession(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //创建和获取会话对象 HttpSession session = req.getSession(); //判断客户端是否是新创建的session boolean isNew = session.isNew(); //获取session的唯一标识 String id = session.getId(); resp.getWriter().write("是否是新创建的Session"+isNew+"<br>"); resp.getWriter().write("id="+id); }
2. 设置Seesion域值
/** * 设置Session的域值 * @author: panther * @date: 2022/6/9 16:45 * @param: [req, resp] * @return: void **/ protected void SetAttribute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.getSession().setAttribute("key1","value1"); System.out.println("set success"); } /** * 得到Session域中的数据 * @author: panther * @date: 2022/6/9 16:45 * @param: [request, response] * @return: void **/ protected void getAttribute(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { Object key1 = request.getSession().getAttribute("key1"); response.getWriter().write("date is "+ key1); }
3. 设置Session超时时长
/** * Session的默认超时时长,可以通过配置在Web.xml文件中修改 * @author: panther * @date: 2022/6/9 23:12 * @param: [request, response] * @return: void **/ protected void defaultLife(HttpServletRequest request, HttpServletResponse response) throws IOException { int maxInactiveInterval = request.getSession().getMaxInactiveInterval(); response.getWriter().write("Session 默认存活时长"+maxInactiveInterval+"秒"); HttpSession session = request.getSession(); session.setMaxInactiveInterval(30);//设置超时时长为30秒设置负数永不超时 response.getWriter().write("30秒后超时"); HttpSession session = request.getSession(); session.invalidate();//使当前会话立即超时 response.getWriter().write("Session 超时结束"); }
标签:session,resp,req,Session,cookie,Cookie,void 来源: https://www.cnblogs.com/panther9985/p/16361691.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。