Move data subset from one alfresco Instance to another

[kirannaidu1]

I have a requirement to move a subset of data (documents and folders) from one alfresco instance running on 4.0.2 to another instance running on 4.2.3
What would be the best way to achieve this?  I want to use a java program to do this? 

[mrogers]

Please don't cross post.   I've deleted them for you.   

You should really upgrade your 4.0.2 instance to 4.2.3 and then transfer or import/export or copy via an API.     Whether you need to upgrade depends upon whether there are any model migrations.   You may be lucky.

[kirannaidu1]

Thanks mrogers.  I am taking the approach of using export/import API.