jsp中JavaBean的用法


UserRegisterBean.java:这是JavaBean

package
JavaBean; public class UserRegisterBean { private String username; private String password; private int age; 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; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }


register.html:注册页面

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> 用户注册信息: <hr> <form action="register.jsp" method="get"> <table> <tr> <td>姓名:<input name="username" type="text" size="16"></td> </tr> <tr> <td>密码:<input name="password" type="password" size="18"></td> </tr> <tr> <td>年龄:<input name="age" type="text" size="16"></td> </tr> <tr> <td><input type="submit" value="提交"></td> </tr> </table> </form> <hr> </body> </html>


 

register.jsp:注册信息处理页面

<%@ page  contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>处理用户注册信息页面</title>
</head>
<body>
    <jsp:useBean id="user" scope="application" class="JavaBean.UserRegisterBean" />
    <jsp:setProperty name="user" property="*" />
    注册成功:
    <hr/>
    使用Bean属性方法:
    <br/>
    用户名:<%=user.getUsername() %>
    <br/>
    密码:<%=user.getPassword() %>
    <br/>
    年龄:<%=user.getAge() %>
    
    <hr/>


使用getProperty动作: <br/> 用户名:<jsp:getProperty property="username" name="user"/> <br/> 密码:<jsp:getProperty property="password" name="user"/> <br/> 年龄:<jsp:getProperty property="age" name="user"/> <hr/> </body> </html>


分别用 JavaBean 和 getProperty 两种方法处理获得注册用户的信息,并输出.

<jsp:useBean id="user"  class="JavaBean.UserRegisterBean" />
等价于:
<%
UserRegisterBean user =new UserRegisterBean();
%>

原文地址:https://www.cnblogs.com/Donnnnnn/p/5657228.html