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(originally posted on the WebWork user forum)
I just finished migrating two applications from Webwork 2.2.4 to Struts 2.0.0 and thought I'd share what steps are involved in the process.
XWork was moved under ASF umbrella sometime ago, thus caused change in DOCTYPE, to be compliant with the current version use the latest version available here. Below is presented the wrong DTD:
The valid one should like this:
Substitute com.opensymphony.webwork to org.apache.struts2.
Substitute com.opensymphony.xwork to com.opensymphony.xwork2.
Rename webwork.properties to struts.properties.
Rename xwork.xml to struts.xml.
Change all occurrences of 'webwork' in struts.properties and struts.xml to 'struts'.
In web.xml, change com.opensymphony.webwork.dispatcher.FilterDispatcher to org.apache.struts2.dispatcher.FilterDispatcher.
If you are using converters that subclass WebworkTypeConverter, rename the superclass to StrutsTypeConverter.
You have to change the taglib URI: uri="/webwork" to uri="/struts-tags"
Then you're done!
Well, maybe I've forgotten something but I'll guess you find that out when you try do compile and deploy your application...