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我创建了一个客户端来使用安全连接和加密有效负载进行测试，因此我想使用默认的 SSL 配置。我试图这样做，但我ConnectionClosedException立即得到了一个和服务器。我应该在服务器上配置一些东西吗？我在下面留下了代码和异常。

HiveMQ：

https://github.com/hivemq/hivemq-community-edition https://github.com/hivemq/hivemq-mqtt-client

代码：

    // Creates the client object using Blocking API 

     subscriber = Mqtt5Client.builder()
    .identifier(UUID.randomUUID().toString()) // the unique identifier of the MQTT client. The ID is randomly generated between 
    .serverHost("localhost")  // the host name or IP address of the MQTT server. Kept it localhost for testing. localhost is default if not specified.
    .serverPort(1883)  // specifies the port of the server
    .addConnectedListener(context -> ClientConnectionRetreiver.printConnected("Subscriber1"))        // prints a string that the client is connected
    .addDisconnectedListener(context -> ClientConnectionRetreiver.printDisconnected("Subscriber1"))  // prints a string that the client is disconnected
    .sslWithDefaultConfig()
    .buildBlocking();  // creates the client builder                
     subscriber.connect();

例外：

com.hivemq.client.mqtt.exceptions.ConnectionClosedException: Server closed connection without DISCONNECT.
at com.hivemq.client.internal.mqtt.MqttBlockingClient.connect(MqttBlockingClient.java:91)
at com.hivemq.client.mqtt.mqtt5.Mqtt5BlockingClient.connect(Mqtt5BlockingClient.java:64)
at com.main.SubThread.run(SubThread.java:71)
at java.base/java.lang.Thread.run(Thread.java:834)
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1 回答 1

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为了使用 Ssl 通信，我需要设置 HiveMQ 服务器以使用 TLS。服务器没有预先配置，必须手动完成。我点击了这个链接：

https://github.com/hivemq/hivemq-community-edition/wiki/HowTos#howto-configure-server-side-tls-with-hivemq-and-keytool-self-signed

于 2019-07-14T20:55:18.477 回答