Question

有没有人知道我的jsp有什么问题。当我尝试打印值时，我得到null个值。如果你不确定，请问我任何问题。我正在使用一个豆子。

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%@ page import="java.util.*" %>
<%@ page import="bean.BookingBean"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Output.jsp</title>
</head>
<body>
    <h1>Get Value from BookingBean</h1>


    <jsp:useBean id="formData" class="bean.BookingBean" scope ="session">

    </jsp:useBean>


    <TABLE BORDER=1>
        <tr><td>Receipt No: ....</td><td><jsp:getProperty name="formData" property="firstName" /> &nbsp <jsp:getProperty name="formData" property="surName"/></td>
            <td><jsp:getProperty name="formData" property="email" /></td>  
        </tr>

        <tr><td>Promotional Code: <jsp:getProperty name="formData" property="promo" /></td>
            <td><jsp:getProperty name="formData" property="date" /></td>
            <td><jsp:getProperty name="formData" property="location" /> &nbsp; <jsp:getProperty name="formData" property="time" /></td>
        </tr>
        <tr><td>Adults:<jsp:getProperty name="formData" property="adult" /><br>
                Children's: <jsp:getProperty name="formData" property="children" /> <br>
                OAP: <jsp:getProperty name="formData" property="oap" /> </td>
            <TD COLSPAN=2><h3>Total Price: £......</h3></td>
        </tr>
    </table>





</body>
 </html>

Answer 1

包含核心taglib：＆lt;％@ taglib uri =“http://java.sun.com/jstl/core”prefix =“c”％＆gt;

尝试使用（对于每个属性）：

<c:out value="${BookingBean.[PROPERTY_NAME]" />

首先，检查BookingBean.java中的getter和setter。

Answer 2

确保您没有在bean类中使用任何索引属性。并检查bean中的getter setter。

Javabean jsp null

2 个答案: