Jboss：JSP中的EL表达式不起作用
[英]Jboss: EL expression in JSP doesn't work
问题描述
I am running Jboss EAP 6.3. 
我正在运行Jboss EAP 6.3。 I have this form: 我有这个表格：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="ISO-8859-1"%>
<!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>registrationPage.jsp</title>
</head>
<body>
<h1>Welcome to JBoss!</h1>
<div>
<p>You have successfully deployed a Java EE 6 web
application.</p>
</div>
<form id="reg" action="register.do" method="POST">
<h2>Member Registration</h2>
<table>
<tr>
<td style="text-align: right;"><label for="name">Name:</label>
</td>
<td><input type="text" id=name name="name"
value="${newMember.name}" /></td>
</tr>
<tr>
<td style="text-align: right;"><label for="email">Email:</label>
</td>
<td><input type="text" id="email" name="email"
value="${newMember.email}" /> <!-- <h:message for="email" errorClass="invalid" />-->
</td>
</tr>
<tr>
<td style="text-align: right;"><label
for="phoneNumber">Phone #:</label></td>
<td><input id="phoneNumber" name="phoneNumber"
type="text" value="${newMember.phoneNumber}" /></td>
</tr>
</table>
<p>
<input id="register" type="submit" value="Register" />
</p>
<p>
<label style="color: green;width: 100%;text-align: left;">${infoMessage}</label>
</p>
<p>
<label style="color: red; width: 100%;text-align: left;">${errorMessage}</label>
</p>
</form>
</body>
</html>
I am pretty sure I didn't change anything since yesterday, but today I woke up and it now looks like this: 我很确定自昨天以来我没有进行任何更改，但是今天我醒了，现在看起来像这样：
There are no errors as far as I can see. 据我所知，没有错误。
2 个解决方案
解决方案1
2 已采纳 2015-04-17 14:27:25
It has been solved by adding 已通过添加解决
isELIgnored="false"
to the page. 到页面。 Like this: 像这样：
<%@ page language="java" contentType="text/html; charset=UTF-8" isELIgnored="false" pageEncoding="ISO-8859-1"%>
Apparently EL expressions are ignored by default and you have to manually enable them. 显然，默认情况下会忽略EL表达式，您必须手动启用它们。
解决方案2
1 2015-04-17 21:06:40
At first check that you have filled up the object "newMember" appropriately before loading this page. 首先，在加载此页面之前，请检查是否已正确填充了对象“ newMember”。 Then you can use the following process to show data in your view: 然后，您可以使用以下过程在视图中显示数据：
At first use this line top of your view page:
首先，请在视图页面的顶部使用此行： <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<％@ taglib prefix =“ c” uri =“ http://java.sun.com/jstl/core”％> Then use the following process for your table, showing on the view.
然后对表使用以下过程，显示在视图上。 Here I have only shown the changes: 在这里，我仅显示了更改： <td><input type="text" id=name name="name" value='<c:out value="${newMember.name}"></c:out>'/> </td> <td><input type="text" id="email" name="email" value='<c:out value="${newMember.email}"></c:out>'/> </td> <td><input id="phoneNumber" name="phoneNumber" type="text" value='<c:out value="${newMember.phoneNumber}"></c:out>'/>
3.I think it's a better process to show data in a view. 3.我认为在视图中显示数据是一个更好的过程。
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