有MQTT 3.1.1和MQTT 5.0的所有功能

• Java 8或以上版本
• Maven

<!-- https://mvnrepository.com/artifact/com.hivemq/hivemq-mqtt-client -->
<dependency>
    <groupId>com.hivemq</groupId>
    <artifactId>hivemq-mqtt-client</artifactId>
    <version>1.1.2</version>
</dependency>

• Gradle

// https://mvnrepository.com/artifact/com.hivemq/hivemq-mqtt-client
compile group: 'com.hivemq', name: 'hivemq-mqtt-client', version: '1.1.2'

建立Client

//MQTT 5
Mqtt5Client client = MqttClient.builder()
        .identifier(UUID.randomUUID().toString())
        .serverHost("broker.hivemq.com")
        .useMqttVersion5()
        .build();
//MQTT 3
Mqtt3Client client = MqttClient.builder()...useMqttVersion3().build();

OR

Mqtt5Client client = Mqtt5Client.builder()...build();
Mqtt3Client client = Mqtt3Client.builder()...build();