8- Cookie&Session&JSP -Session

8- Cookie&Session&JSP -Session

实现代码1:

/* Session 的基本使用* */@WebServlet("/servletSession1")public class servletSession extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //1. 获取请求的用户名 访问时自己拼接username参数 String username = req.getParameter("username"); //2. 获取HttpSession对象 HttpSession session = req.getSession(); //这两条输出语句是验证session是不是一样的 System.out.println(session); System.out.println(session.getId()); //3. 将用户名设置到共享数据中 session.setAttribute("username",username); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); }}

实现代码2:

/* Session 的基本使用* */@WebServlet("/servletSession2")public class servletSession2 extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //获取HttpSession 对象 HttpSession session = req.getSession(); //这两条输出语句是验证session是不是一样的 System.out.println(session); System.out.println(session.getId()); //获取共享数据 Object username = session.getAttribute("username"); //将数据响应给浏览器 resp.getWriter().write(username + ""); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); }}

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