Need to access an image from your CSS file? Prepend the final portlet name followed by the path of the images folder. Here’s an example: hellospring-portlet/images/hellospring.png And that’s all there is to it.
One thing I discovered while developing the sample Spring portlet: jar file conflicts between the plugin portlet and Liferay are a big headache. If Liferay has a version different from the one in your plugin, expect some very strange, confusing exception errors. Its Best to just make sure you only include the jars you need [...]
In your portlet.xml descriptor, you’re only required to indicate the View mode. Accordingl to the Portlet Development guide, the other modes, EDIT and HELP, are optional.