セッションを保存
req.setCharacterEncoding("utf-8");
resp.setContentType("text/html;charset=UTF-8");
req.getSession().setAttribute("name","tinumb");
//设置失效
session.invalidate();
セッションを取得
req.setCharacterEncoding("utf-8");
resp.setContentType("text/html;charset=UTF-8");
Object name = req.getSession().getAttribute("name");
PrintWriter writer = resp.getWriter();
writer.println(name+"");
有効期限を設定する
<session-config>
<!-- 15分钟后失效-->
<session-timeout>15</session-timeout>
</session-config>