Java Firebase-Admin缺少GoogleCredentials

Java Firebase-Admin missing GoogleCredentials

我想制作一个可以访问Firebase数据库的服务器应用程序。

我遵循了本指南：https://firebase.google.com/docs/admin/setup#initialize_the_sdk

但是我收到以下错误：

cannot resolve GoogleCredentials

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FileInputStream serviceAccount = new
FileInputStream("path/to/serviceAccountKey.json");

FirebaseOptions options = new FirebaseOptions.Builder()
.setCredentials(GoogleCredentials.fromStream(serviceAccount))
.setDatabaseUrl("https://<DATABASE_NAME>.firebaseio.com/")
.build();

FirebaseApp.initializeApp(options);

编辑：

导入以下库后：

org.json.jar

netty-all-4.0.0.final.jar

google-http-client-1.16.0-rc.jar

google-http-client-1.16.0-rc-sources.jar

firebase-admin-5.9.0.jar

google-auth-library-oauth2-http-0.9.0.jar

google-auth-library-credentials-0.9.0.jar

google-api-client-1.23.0.jar

google-api-client-1.4.1-beta.jar

guava-24.0-jre.jar

google-http-client-jackson2-1.23.0.jar

jackson-core-2.9.4.jar

slf4j-api-1.7.25.jar

slf4j-jdk14-1.7.25.jar

api-common-1.3.9.jar

我陷入了这个错误：

Feb 27, 2018 2:15:33 PM com.google.firebase.database.logging.LogWrapper error
SCHWERWIEGEND: Uncaught exception in Firebase Database runloop (5.9.0). Please report to [email protected]
java.lang.NoSuchMethodError: io.netty.channel.nio.NioEventLoopGroup.(ILjava/util/concurrent/Executor;)V
at com.google.firebase.database.connection.NettyWebSocketClient.(NettyWebSocketClient.java:71)
at com.google.firebase.database.connection.WebsocketConnection$DefaultWSClientFactory.newClient(WebsocketConnection.java:435)
at com.google.firebase.database.connection.WebsocketConnection.(WebsocketConnection.java:80)
at com.google.firebase.database.connection.WebsocketConnection.(WebsocketConnection.java:68)
at com.google.firebase.database.connection.Connection$DefaultWebsocketConnectionFactory.newConnection(Connection.java:297)
at com.google.firebase.database.connection.Connection.(Connection.java:72)
at com.google.firebase.database.connection.Connection.(Connection.java:57)
at com.google.firebase.database.connection.PersistentConnectionImpl$DefaultConnectionFactory.newConnection(PersistentConnectionImpl.java:1303)
at com.google.firebase.database.connection.PersistentConnectionImpl.openNetworkConnection(PersistentConnectionImpl.java:547)
at com.google.firebase.database.connection.PersistentConnectionImpl.access$800(PersistentConnectionImpl.java:37)
at com.google.firebase.database.connection.PersistentConnectionImpl$1$1.onSuccess(PersistentConnectionImpl.java:500)
at com.google.firebase.database.core.Context$1$1.onSuccess(Context.java:67)
at com.google.firebase.database.core.JvmAuthTokenProvider.getToken(JvmAuthTokenProvider.java:66)
at com.google.firebase.database.core.Context$1.getToken(Context.java:62)
at com.google.firebase.database.connection.PersistentConnectionImpl$1.run(PersistentConnectionImpl.java:490)
at com.google.firebase.database.connection.util.RetryHelper$1.run(RetryHelper.java:93)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)