defaultMQAdminExt.start();
String group = commandLine.getOptionValue('g').trim();
String topic = commandLine.getOptionValue('t').trim();
ProducerConnection pc = defaultMQAdminExt.examineProducerConnectionInfo(group, topic);
int i = 1;
for (Connection conn : pc.getConnectionSet()) {
System.out.printf("%04d %-32s %-22s %-8s %s\n",//
i++,//