resetSheetDataValidations.java

 /** 
     * SPECIFIC TO XSSF 
     * This remove all the data validation from a sheet 
     * @param: pSheet the sheet where it's needed to remove the data validation 
     */ 
    public static void removeDataValidation(XSSFSheet pSheet) 
    { 
        //Disable the data validation for the sheet 
        pSheet.getCTWorksheet().unsetDataValidations(); 
        //Enable the data validation for the sheet with no data validation 
        pSheet.getCTWorksheet().setDataValidations(null); 
    }