4.0.0 whatsmars-mq org.hongxi Rocket.S2 whatsmars-mq-rocketmq jar ${project.artifactId} RocketMQ demo org.hongxi.whatsmars.rocketmq.boot.producer.ProducerApplication org.hongxi rocketmq-spring-boot-starter Rocket.S2 org.springframework.boot spring-boot-maven-plugin