We are currently using Struts2.0, and planning to upgrade it to 2.5.X. Is there any migration process which helps me to directly upgrade to 2.5.X?, cause V2.0 is very old and lot of new things are implemented in later versions.
Some have suggested that don't migrate directly to 2.5.X as there are a lot of changes happened. However, first upgrade it to 2.3.X and then 2.5.X.
I have updated links in my answer to your question mentioned above. However there's no direct link to the migration guide.
You can use this link if it could help you in the migration process.
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