RabbitMQ如何保证不丢数据？ Spring Boot实现confirm机制及ack消费端主动回调

yml配置：

spring:
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest
    password: guest
    #发送确认 对应RabbitTemplate.ConfirmCallback接口
    publisher-confirms: true
    #发送失败回退，对应RabbitTemplate.ReturnCallback接口
    publisher-returns: true
    #手动提交ack
    listener:
      direct:
        acknowledge-mode: manual
      simple:
        acknowledge-mode: manual

@Configuration
public class RabbitConfig {
 
    /**
     * 定义一个队列
     * @return
     */
    @Bean
    public Queue okongQueue() {
        return new Queue("user");
    }
 
    @Bean
    MessageConverter messageConverter() {
        return new Jackson2JsonMessageConverter();
    }
 
}

@Service
public class SenderService implements RabbitTemplate.ConfirmCallback,RabbitTemplate.ReturnCallback {
 
    @Autowired
    private RabbitTemplate rabbitTemplate;
 
    public void sendMq() throws InterruptedException {
        this.rabbitTemplate.setConfirmCallback(this);
        rabbitTemplate.convertAndSend("user", "6666666");
    }
 
    @Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) {
        System.out.println("=====已消费======");
        if(ack){
            System.out.println("消息: "+correlationData+"，已经被ack成功");
        }else{
            System.out.println("消息: "+correlationData+"，nack，失败原因是："+cause);
        }
    }
 
    @Override
    public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
        System.out.println("sender return success" + message.toString());
    }
}

@Component
@RabbitListener(queues = "user")
@Slf4j
public class Consumer {
 
    @RabbitHandler
    public void process(String messageStr, Channel channel, Message message) {
        log.info("接收的消息为: {}", messageStr);
        try {
            //通知服务器此消息已经被消费，可从队列删掉， 这样以后就不会重发，否则后续还会在发
            channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

还可指定以下处理方式，可参考api：

        //消息的标识，false只确认当前一个消息收到，true确认所有consumer获得的消息
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
 
        //ack返回false，并重新回到队列，api里面解释得很清楚
        channel.basicNack(message.getMessageProperties().getDeliveryTag(), false, true);
 
        //丢弃这条消息
        channel.basicNack(message.getMessageProperties().getDeliveryTag(), false,false);
 
        //拒绝消息
        channel.basicReject(message.getMessageProperties().getDeliveryTag(), true);

@RestController
public class RabbitMqController {
 
    @Autowired
    private SenderService senderService;
 
    @PostMapping("/sendMq")
    public void sendMq() throws InterruptedException {
        senderService.sendMq();
    }
 
}