poi框架如何生成加密的EXCEL

①给execl加密(打开时需要密码才能看)
②还是给sheet加密等(可以打开查看,但是无法编辑)

如果是①
String filePath ="xxx";FileInputStream fileInputStream = new FileInputStream(filePath);POIFSFileSystem file = new POIFSFileSystem(fileInputStream); // openHSSFWorkbook aWorkBook = new HSSFWorkbook(file);aWorkBook.writeProtectWorkbook("password", "username");

如果是②
HSSFSheet aSheet = aWorkBook.createSheet("sheetName");aSheet.protectSheet("password");