This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The Spring Validator interface is not tied down to Spring MVC, so You can definitely use it in a standalone application. The only difference would be that you will need to get a reference to the Validator and invoke the validate method yourself.
Perhaps something like -
If you do a search in Spring forums or documentation, you should be able to find some examples.