i18n cannot find resource bundle

I have placed translation开发者_开发问答 file app_fi.properties in folder /WEB-INF/i18n/, but I get following error message. What could be wrong here?

java.util.MissingResourceException: Can't find bundle for base name WEB-INF.i18n.app, locale fi_FI  java.util.ResourceBundle.throwMissingResourceException(Unknown Source)  java.util.ResourceBundle.getBundleImpl(Unknown Source)
    java.util.ResourceBundle.getBundle(Unknown Source)  

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You have to put app_*.properties in /WEB-INF/classes (or somewhere in the classpath) and load it as it were a class.

By example:

/WEB-INF/classes/i18n/pack2/app_fi.properties

is loaded with

ResourceBundle.getBundle("i18n.pack2.app", ...)

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Did you add the WEB-INF/i18n folder to the containers' classpath?