void queryByKey(final DefaultMQAdminExt admin, final String topic, final String key) throws MQClientException, InterruptedException { admin.start(); QueryResult queryResult = admin.queryMessage(topic, key, 32, 0, Long.MAX_VALUE); System.out.printf( "%-50s %-4s %s\n", // "#Message ID", // "#QID", // "#Offset"); for (MessageExt msg : queryResult.getMessageList()) { System.out.printf("%-50s %-4d %d\n", msg.getMsgId(), msg.getQueueId(), msg.getQueueOffset()); } }