apache poi add .0 on a number
InputStream inp =getClass().getResourceAsStream("filename.xls"));
Workbook wb = WorkbookFactory.create(inp);
DataFormatter objDefaultFormat = new DataFormatter();
FormulaEvaluator objFormulaEvaluator = new HSSFFormulaEvaluator((HSSFWorkbook) wb);
Sheet sheet= wb.getSheetAt(0);
Iterator<Row> objIterator = sheet.rowIterator();
while(objIterator.hasNext()){
Row row = objIterator.next();
Cell cellValue = row.getCell(0);
objFormulaEvaluator.evaluate(cellValue); // This will evaluate the cell, And any type of cell will return string value
String cellValueStr = objDefaultFormat.formatCellValue(cellValue,objFormulaEvaluator);
}