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fastexcel Generate and read big Excel files quickly There are not many alternatives when you have to generate xlsx Excel workbooks in Java. The most popular one (Apache POI) includes many features, but when it comes down to huge worksheets it quickly becomes a memory hog. Its streaming API may mitigate this problem but it introduces several limitations: Its sliding window mechanism prevents you from accessing cells above the current writing position. It writes stuff to a temporary file. It come...