Notes of struts-config.xml

1. There should be ONLY ONE default message-resources attribute, otherwise it will find no message. If there are more than one resource files, we need to use key attribute to take part of them. For example:

<message-resource parameter="ApplicationResources" />
<message-resource key="Image" parameter="ApplicationImageResources"/>
<message-resource key="Sound" parameter="ApplicationSoundResources"/>

more needed to be added...