// Create a new workbook Workbook workbook = new Workbook(); IWorksheet worksheet = workbook.getWorksheets().get(0); //config range B1's Locked property. worksheet.getRange("B1").setLocked(false); //protect worksheet, range B1 can be modified in exported xlsx file. worksheet.setProtection(true); // Save to an excel file workbook.save("SetRangeLocked.xlsx");