安装activemq报错

1、of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
使用一个较低的activemq版本
2、Failed to bind to server socket: amqp://0.0.0.0:5672?maximumConnections=1000&wireFormat.maxFrameSize=104857600 due to: java.net.BindException: Address already in use: JVM_Bind
端口冲突，由于安装的rabbitmq占用的端口为15672和5672，所以停止rabbitmq的服务即可。