在jsp中启用el [英] enabling el in jsp

问题描述

如何在JSP 2.0版中启用EL表达式？每次我在JSP中将EL表达式作为字符串文字作为输出。

How can I enable EL expression in JSP version 2.0? Every time I'm getting EL expression as an String literal in the JSP as an output.

这是容器用于向servlet发送请求的DD，然后servlet向JSP发出请求：

Here's the DD which the container is using to sending request to servlet, and then servlet dispating request to JSP:

    <web-app xmlns="http://java.sun.com/xml/ns/j2ee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
         version="2.4">

    <servlet>
    <servlet-name>check</servlet-name>
    <servlet-class>Welcome</servlet-class>

    </servlet>


<servlet-mapping>
<servlet-name>check</servlet-name>
<url-pattern>/Momma.do</url-pattern>
</servlet-mapping>

</web-app>

我也没有忽略JSP中的任何el。我还缺少什么吗？

I've not ignored any el in JSP too. Am I still missing something?

推荐答案

你的web.xml文件看起来很适合JSP 2.0。如果您在特定页面上访问EL时遇到问题，请尝试将以下内容添加到单个JSP页面的顶部：

Your web.xml file looks fine for JSP 2.0. If you are having problems accessing EL on specific pages try adding the following to the top of the individual JSP page:

<%@ page isELIgnored="false" %>

由于您使用的是JSP 2.0，我认为默认情况下会忽略EL，因此您可以添加以下内容到你的web.xml为所有页面启用它：

Since you are using JSP 2.0 I think that EL is ignored by default so you can can add the following to your web.xml to enable it for all pages:

<jsp-config>
  <jsp-property-group>
    <url-pattern>*.jsp</url-pattern>
    <el-enabled>true</el-enabled>
    <scripting-enabled>true</scripting-enabled>
  </jsp-property-group>
</jsp-config>

这篇关于在jsp中启用el的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！