我遇到一个问题，那就是一切正常，例如角色和身份验证。但是，由于无法获得帐户的权限，我的开发已停止。权限始终返回null，我不知道为什么。
DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
ModularRealmAuthenticator authenticator = new ModularRealmAuthenticator();
authenticator.setAuthenticationStrategy(new AtLeastOneSuccessfulStrategy());
defaultSecurityManager.setAuthenticator(authenticator);
ModularRealmAuthorizer authorizer = new ModularRealmAuthorizer();
authorizer.setPermissionResolver(new WildcardPermissionResolver());
defaultSecurityManager.setAuthorizer(authorizer);
JdbcRealm realm = new JdbcRealm();
realm.setDataSource(DatabaseUtil.DATA_SOURCE);
realm.setAuthenticationQuery("SELECT password FROM account WHERE username = ?");
realm.setUserRolesQuery("SELECT accountRole FROM account WHERE username = ?");
realm.setPermissionsQuery("SELECT permissions FROM account WHERE username = ?");
realm.setPermissionsLookupEnabled(true);
realm.setCredentialsMatcher(new PasswordMatcher());
defaultSecurityManager.setRealm(realm);
SecurityUtils.setSecurityManager(defaultSecurityManager);