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You might be using Apache Poi for reading excel ?? If yes then you can check cell value you can refer below https://tutorial.techaltum.com/read-excel-data-with-Apache-POI.html

Mohammed's path is the one I'd use. Basically leverage POI to check everything you want to check for.

I'd have a method that knows how to validate a row, then I'd open the sheet and for each row that would be processed invoke the validation method for it.