JSP中param动作的实例详解

JSP中param动作的实例详解

一 语法

常常与一起使用，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+"/";
%>
 


 
  
  
  
  
    
    
      
    
    
    
 
 
 
 
  
系统登录
  

  

   

    

     
用户名：
     

    
    

     
密码：
     

    
    

     

    
   
  
 

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+"/";
%>
 


 
  
  
  
  
    
    
      
    
    
    
 
 
 
 
  
   
   
  
 

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+"/";
%>
 


 
  
  
  
  
    
    
      
    
    
    
 
 
 
 
  
用户资料
  

  <%
    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 %>

    密码：<%=password %>

    电子邮箱：<%=email %>

 

 

三 运行结果

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