一 session对象简介
二 session对象的方法
三 实例
1、session_page1.jsp
<%@
page
language
=
"java"
import
=
"java.util.*,java.text.*"
contentType
=
"text/html; charset=utf-8"
%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+
"://"
+request.getServerName()+
":"
+request.getServerPort()+path+
"/"
;
%>
<!
DOCTYPE
HTML
PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN">
<
html
>
<
head
>
<
base
href
=
"
<%=
basePath
%>
"
>
<
title
>
My JSP 'index.jsp' starting page
</
title
>
<
meta
http-equiv
=
"pragma"
content
=
"no-cache"
>
<
meta
http-equiv
=
"cache-control"
content
=
"no-cache"
>
<
meta
http-equiv
=
"expires"
content
=
"0"
>
<
meta
http-equiv
=
"keywords"
content
=
"keyword1,keyword2,keyword3"
>
<
meta
http-equiv
=
"description"
content
=
"This is my page"
>
<!--
<link
rel
="
stylesheet
" type="text/
css
"
href
="styles.css">
-->
</
head
>
<
body
>
<
h1
>
session内置对象
</
h1
>
<
hr
>
<%
SimpleDateFormat sdf =
new
SimpleDateFormat(
"yyyy年MM月dd日 HH:mm:ss"
);
Date d =
new
Date(session.getCreationTime());
session.setAttribute(
"username"
,
"admin"
);
session.setAttribute(
"password"
,
"123456"
);
session.setAttribute(
"age"
, 20);
//设置当前session最大生成期限单位是秒
//session.setMaxInactiveInterval(10);//10秒钟
%>
Session创建时间:
<%=
sdf.format(d)
%>
<
br
>
Session的ID编号:
<%=
session.getId()
%>
<
BR
>
从Session中获取用户名:
<%=
session.getAttribute(
"username"
)
%>
<
br
>
<
a
href
=
"session_page2.jsp"
target
=
"_blank"
>
跳转到Session_page2.
jsp
</
a
>
</
body
>
</
html
>
2、session_page2.jsp
<%@
page
language
=
"java"
import
=
"java.util.*,java.text.*"
contentType
=
"text/html; charset=utf-8"
%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+
"://"
+request.getServerName()+
":"
+request.getServerPort()+path+
"/"
;
%>
<!
DOCTYPE
HTML
PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN">
<
html
>
<
head
>
<
base
href
=
"
<%=
basePath
%>
"
>
<
title
>
My JSP 'index.jsp' starting page
</
title
>
<
meta
http-equiv
=
"pragma"
content
=
"no-cache"
>
<
meta
http-equiv
=
"cache-control"
content
=
"no-cache"
>
<
meta
http-equiv
=
"expires"
content
=
"0"
>
<
meta
http-equiv
=
"keywords"
content
=
"keyword1,keyword2,keyword3"
>
<
meta
http-equiv
=
"description"
content
=
"This is my page"
>
<!--
<link
rel
="
stylesheet
" type="text/
css
"
href
="styles.css">
-->
</
head
>
<
body
>
<
h1
>
session内置对象
</
h1
>
<
hr
>
<%
//SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
//Date d = new Date(session.getCreationTime());
//session.setAttribute("username", "admin");
%>
Session的ID编号:
<%=
session.getId()
%>
<
BR
>
从Session中获取用户名:
<%=
session.getAttribute(
"username"
)
%>
<
br
>
Session中保存的属性有:
<%
String[] names =session.
getValueNames()
;
for
(
int
i=0;i<names.length;i++)
{
out.println(names[i]+
" "
);
}
%>
<
br
>
</
body
>
</
html
>
四 运行结果