import com.myexcel.ExcelReader; import com.myexcel.ExcelWriter; import com.myexcel.data.CellData; import com.myexcel.data.RowData; import com.myexcel.data.SheetData; public class MyExcelDemo { public static void main(String[] args) { SheetData sheetData = ExcelReader.read("input.xlsx"); for (RowData rowData : sheetData.getRows()) { for (CellData cellData : rowData.getCells()) { System.out.println(cellData.getValue()); } } ExcelWriter.write(sheetData, "output.xlsx"); } }