一 get和post的区别
二 实战(post方式提交)
1、login.jsp
<%@
page
language
=
"java"
import
=
"java.util.*"
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 'login.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
>
用户登录
</
h1
>
<
hr
>
<
form
action
=
"dologin.jsp"
name
=
"loginForm"
method
=
"post"
>
<
table
>
<
tr
>
<
td
>
用户名:
</
td
>
<
td
><
input
type
=
"text"
name
=
"username"
/></
td
>
</
tr
>
<
tr
>
<
td
>
密码:
</
td
>
<
td
><
input
type
=
"password"
name
=
"password"
/></
td
>
</
tr
>
<
tr
>
<
td
colspan
=
"2"
><
input
type
=
"submit"
value
=
"登录"
></
td
>
</
tr
>
</
table
>
</
form
>
</
body
>
</
html
>
2、dologin.jsp
<%@
page
language
=
"java"
import
=
"java.util.*"
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 'dologin.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
>
登录成功
</
h1
>
<
hr
>
</
body
>
</
html
>
三 运行结果