一 <jsp:useBeans>
作用：在jsp页面中实例化或者在指定范围内使用javabean：
<jsp:useBean id="标示符" class="java类全名" scope="作用范围">
二 代码
1、Users.java
package
com.po;
/*
* 用户类
* */
public
class
Users
{
private
String
username
;
//用户名
private
String
password
;
//密码
//保留此默认的构造方法
public
Users()
{
}
public
String getUsername() {
return
username
;
}
public
void
setUsername(String username) {
this
.
username
= username;
}
public
String getPassword() {
return
password
;
}
public
void
setPassword(String password) {
this
.
password
= password;
}
}
2、useBean.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 '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
>
<
jsp:useBean
id
=
"myUsers"
class
=
"com.po.Users"
scope
=
"page"
/>
<
h1
>
使用useBean动作创建
javabean
的实例
</
h1
>
<
hr
>
用户名：
<%=
myUsers.getUsername()
%>
<
br
>
密码：
<%=
myUsers.getPassword()
%>
<
br
>
</
body
>
</
html
>
三 测试
