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''taken from the newsgroup:''

It's a pain to work with i18n'ed jsp pages, and restart the container every time I want to see if the keys are working ok.

Actually there is a feature in OpenCms 6.2 for this:

All OpenCms module based message bundles are flushed if you clear the cache,
which can be triggered by "Administration View >  Workplace Tools >
Re-Initialize the Workplace". 

You can also use this caching behaviour in your Java code like this:

org.opencms.i18n.CmsResourceBundleLoader.getBundle(baseName, locale);

which is the same as 

java.util.resourceBundle.getBundle(baseName, locale);

only that we do have the flushable bundle cache. 

You should put the property-files into your module's classes folder in opencms.
comment: This didn't work for me, but it works putting it in "/tomcat/webapps/opencms/WEB-INF/classes".

Example:

<nowiki><%@page import="org.opencms.jsp.*, org.opencms.file.*, org.opencms.flex.*, java.util.*" %></nowiki>

<nowiki><%@ taglib prefix="cmstag" uri="http://www.opencms.org/taglib/cms" %></nowiki>

<nowiki><%</nowiki>

<nowiki>org.opencms.i18n.CmsResourceBundleLoader.flushBundleCache(); // this is probably just good for testing</nowiki>

<nowiki>java.util.ResourceBundle messages = org.opencms.i18n.CmsResourceBundleLoader.getBundle("your_bundle_here", new</nowiki> 

<nowiki>java.util.Locale("es"));</nowiki>

<nowiki>%></nowiki>

<nowiki><%= messages.getString("test.label1") %></nowiki>