String excelPath = "Excel文件路徑";

String password = "Excel文件密碼";

Workbook workbook;

InputStream inp = new FileInputStream(excelPath);

//解密

POIFSFileSystem pfs = new POIFSFileSystem(inp);

inp.close();

EncryptionInfo encInfo = new EncryptionInfo(pfs);

Decryptor decryptor = Decryptor.getInstance(encInfo);

decryptor.verifyPassword(password);

workbook = new XSSFWorkbook(decryptor.getDataStream(pfs));