原版：http://my.oschina.net/chenhao901007/blog/370109
1.jsp中操作session
(String)request.getSession().getAttribute("username"); // 获取request.getSession().setAttribute("username", "xxx"); // 设置//servlet中request.getSession();session.getAttribute("username");session.setAttribute("username", "xxx");session.setMaxInactiveInterval（30*60）；session.invalidate(); //struts中方法1ServletActionContext.getRequest().getSession().setAttribute("username", "xxx");ServletActionContext.getRequest().getSession().getAttribute("username");ServletActionContext.getRequest().getSession().setMaxInactiveInterval(30*60); ServletActionContext.getRequest().getSession().invalidate();//struts中方法2ActionContext.getContext().getSession().put("username", "xxx");ActionContext.getContext().getSession().get("username");ActionContext.getContext().getSession().clear();<session-config> <session-timeout>30</session-timeout> </session-config><session-config> <session-timeout>30</session-timeout></session-config>原文：http://www.cnblogs.com/xiaoxiao5ya/p/4773525.html