java httpsession 类型_JavaWeb——HttpSession常用方法示例

HttpSession接口中方法

getId()

getCreationTime()

getLastAccessedTime()

setMaxInactiveInterval()

getMaxInactiveInterval()

isNew():如果客户端请求消息中返回了一个与Servlet程序当前获得的HttpSession对象的会话标识号相同，则认为这个HttpSession对象不是新建的

invalidate()

getServletContext()

setAttribute()

getAttribute()

removeAttribute()

getAttributeNames()

login.jsp

Created by IntelliJ IDEA.

User: dell

Date: 2019/7/10

Time: 15:52

To change this template use File | Settings | File Templates.

--%>

Title

SessionID:

IsNew:

MaxInactive:

CreateTime:

LastAssessTime:

Object username = session.getAttribute("username");

if (username ==null){

username ="";

}

%>

username:

hello.jsp

Created by IntelliJ IDEA.

User: dell

Date: 2019/7/10

Time: 15:56

To change this template use File | Settings | File Templates.

--%>

Title

SessionID:

IsNew:

MaxInactive:

CreateTime:

LastAssessTime:

Hello:

session.setAttribute("username",request.getParameter("username"));

%>

重新登录

注销

logout.jsp

Created by IntelliJ IDEA.

User: dell

Date: 2019/7/10

Time: 16:07

To change this template use File | Settings | File Templates.

--%>

Title

SessionID:

IsNew:

MaxInactive:

CreateTime:

LastAssessTime:

BYE:

重新登录

session.invalidate();

%>