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I know that we can use Apache POI to parse an Excel file and get data. But I heard of a strange thing that excel file can be passed in a similar way we parse CSV (Like just read the file from file Stream and separate each column value with a “comma” separator). When we parse Excel we have to use tab as a delimiter. Is it possible? If yes then why Apache has come up with such a complicated framework. I am puzzled. Can someone help me?
CSV is a text format, so it can be parsed using the delimiters. Old Excel is a binary and proprietary format so it needs clever decoding. The new Excel format is zipped XMLs, but one should also understand the structure of this document before it could be transformed into something as simple as reading cells one by one. So the answer to your question is no, you’ll need to use Apache POI, and also – there’s nothing wrong with that.
As a side note, on the path to become a good developer you will need to learn to do a bit of your own research before looking for help. Get your hands dirty is the best way to learn things.