如何在Java中实施MS Word的密码保护？

我确实看到了各种加强保护的选项，但没有一个是使用密码的。我该怎么做

File file               = new File(fileName);
FileInputStream fis     = new FileInputStream(file.getAbsolutePath());
XWPFDocument document   = new XWPFDocument(fis);

document.enforceCommentsProtection();
document.enforceFillingFormsProtection();
document.enforceReadonlyProtection();
document.enforceTrackedChangesProtection();
document.enforceUpdateFields();

document.removeProtectionEnforcement();

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您可以使用ApachePOI提供密码保护

        POIFSFileSystem fs = new POIFSFileSystem();
        EncryptionInfo info = new EncryptionInfo(fs, EncryptionMode.agile);

        Encryptor enc = info.getEncryptor();
        enc.confirmPassword("xxxxx");

        OPCPackage opc = OPCPackage.open(new File("c:/test/sample.xlsx"),PackageAccess.READ_WRITE);
        OutputStream os = enc.getDataStream(fs);
        opc.save(os);
        opc.close();

        FileOutputStream fos = new FileOutputStream("c:/test/sample.xlsx");
        fs.writeFilesystem(fos);
        fos.close();