useBean动作元素

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一

作用：在jsp页面中实例化或者在指定范围内使用javabean：

 

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" >

        

  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

 

 

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