主页 / 网络编程 /

JSP中param动作的实例详解

网络编程 2021-07-05 11:23www.168986.cn编程入门
这篇文章主要介绍了JSP中param动作的实例详解的相关资料,希望通过本文能帮助到大家，需要的朋友可以参考下

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" >
  
  <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" 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>
     <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%>" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  
  <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" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
    -->
 
 </head>
 
 <body>
  <jsp:forward page="user.jsp">
   <jsp:param value="admin@123." 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" >
  
  <title>My 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

如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

上一篇：JSP的include指令的使用方法 下一篇：JSP 中Servlet的自己实现

编程语言

Copyright © 2016-2025 www.168986.cn 狼蚁网络 版权所有 Power by