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20070801 Wednesday August 01, 2007

Trim Spaces in your JSP's HTML Redux Since my last post on trimming whitespace in JSPs seems to be a popular topic, I figured it appropriate to note that JSP 2.1 supports a new trimWhitespace directive. 

<%@ page trimDirectiveWhitespaces="true" %>

If you're using a Servlet 2.5 XSD, you can also do this in your web.xml:

    <jsp-config>
      <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <trim-directive-whitespaces>true</trim-directive-whitespaces>
      </jsp-property-group>
    </jsp-config>

A Servlet 2.5 XSD seems to be the following:

<web-app
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    metadata-complete="false"
    version="2.5">

To learn more about this feature, view Summary of New Features in JSP 2.1 Technology and search for "TrimWhiteSpace". It'd be nice if there was anchors in this article for a direct link, but I couldn't find any.

Now I just wish JSP's EL had an xmlEscape="true" flag to escape XML in printed variables. Freemarker supports this.

Hat tip to Kerem and Krishna's Unified Expression Language for JSP and JSF article. Posted in Java at Aug 01 2007, 05:01:25 PM MDT 7 Comments

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Matt Raible is the Lead UI Architect at LinkedIn. The opinions on this site are mine, not my employers.
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