RocketMQ可靠同步发送代码

import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.common.RemotingHelper;
/**
 * 同步发送
 */
public class SyncProducer {
    public static void main(String[] args) throws Exception {
        DefaultMQProducer producer = new DefaultMQProducer("sync");
        producer.setNamesrvAddr("zjj101:9876");
        producer.start();
        for (int i = 0; i < 10; i++) {
            Message msg = new Message("TopicTest",
                    "TagB",
                    ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET)
            );
            SendResult sendResult = producer.send(msg);
            //调用send方法会有个sendResult这个同步相应结果，来知道我消息是否发送成功了。
            //发送的一条消息必须要等待我消息响应完了才能发送第二条消息。
            System.out.printf("%s%n%n%n", sendResult.getSendStatus() + ":(MsgId):"
                    + sendResult.getMsgId() + ":(queueId):"
                    + sendResult.getMessageQueue().getQueueId()
                    + "(value):" + new String(msg.getBody()));
        }
        producer.shutdown();
    }
}