Javaファイル暗号化権限例外(FileEncryptionPermissionException)の解決方法

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclFileAttributeView;
import java.nio.file.attribute.UserPrincipal;

public class FilePermissionChecker {

    public static boolean hasPermission(Path filePath) {
        try {
            AclFileAttributeView aclView = Files.getFileAttributeView(filePath, AclFileAttributeView.class);
            UserPrincipal currentUser = aclView.getFileSystem().getUserPrincipalLookupService().lookupPrincipalByName(System.getProperty("user.name"));

            for (AclEntry entry : aclView.getAcl()) {
                if (entry.principal().equals(currentUser)) {
                    return entry.permissions().containsAll(Files.readAttributes(filePath, "dos:encryption"));
                }
            }

            return false;
        } catch (IOException e) {
            return false;
        }
    }

    public static void main(String[] args) {
        Path filePath = Path.of("C:/path/to/file.txt");
        System.out.println("Has permission: " + hasPermission(filePath));
    }
}

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.UserPrincipal;
import java.nio.file.attribute.UserPrincipalLookupService;

public class FilePermissionElevation {

    public static void main(String[] args) {
        Path filePath = Path.of("C:/path/to/file.txt");
        UserPrincipalLookupService lookupService = filePath.getFileSystem().getUserPrincipalLookupService();

        try {
            UserPrincipal user = lookupService.lookupPrincipalByName("username");
            Files.getFileAttributeView(filePath, UserPrincipal.class).setOwner(user);
            System.out.println("Permission elevated successfully.");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Failed to elevate permission.");
        }
    }
}