javaweb之session

保存session

req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=UTF-8");

        req.getSession().setAttribute("name","tinumb");
		//设置失效
		 session.invalidate();

获取session

req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=UTF-8");

        Object name = req.getSession().getAttribute("name");

        PrintWriter writer = resp.getWriter();

        writer.println(name+"");

设置失效时间

<session-config>
<!--    15分钟后失效-->
    <session-timeout>15</session-timeout>
  </session-config>