public static String getNameServerStr(String nameServer) {
		if (StringUtils.isEmpty(nameServer)) {
			return RocketMQConst.DEFAULT_NAME_SERVER;
		}
		return nameServer.replaceAll(",", ";");
	}
@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/utils/RocketMQUtils.java