JSP中param动作的实例详解
一 语法
jsp:param name="参数名" value="参数值"
常常与jsp:forward一起使用，作为其子标签存在。
二 代码
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%" rel="external nofollow" rel="external nofollow" rel="external nofollow"
titleMy 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" rel="external nofollow" rel="external nofollow" rel="external nofollow"
--
/head
body
h1系统登录/h1
hr
form name="loginForm" action="dologin.jsp" method="post"
table
tr
td用户名：/td
tdinput type="text" name="username"//td
/tr
tr
td密码：/td
tdinput 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%" rel="external nofollow" rel="external nofollow" rel="external nofollow"
titleMy 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" rel="external nofollow" rel="external nofollow" rel="external nofollow"
--
/head
body
jsp:forward page="user.jsp"
jsp:param value="admin@123.net" name="email"/
jsp:param value="888888" name="password"/
/jsp:forward
/body
/html
3、user.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%" rel="external nofollow" rel="external nofollow" rel="external nofollow"
titleMy JSP 'user.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" rel="external nofollow" rel="external nofollow" rel="external nofollow"
--
/head
body
h1用户资料/h1
hr
%
request.setCharacterEncoding("utf-8");
String username = "";
String password = "";
String email = "";
if(request.getParameter("username")!=null)
{
username = request.getParameter("username");
}
if(request.getParameter("password")!=null)
{
password = request.getParameter("password");
}
if(request.getParameter("email")!=null)
{
email = request.getParameter("email");
}
%
用户名：%=username %br
密码：%=password %br
电子邮箱：%=email %br
/body
/html
三 运行结果
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