import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;
import org.springframework.amqp.support.ConsumerTagStrategy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import com.alibaba.fastjson.JSONObject;
import com.rabbitmq.client.Channel;
import org.springframework.context.annotation.Configuration;
@Configuration
public class SimpleMessageListener {
@Bean
public SimpleMessageListenerContainer messageContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
// 添加队列 可以添加多个队列
container.setExposeListenerChannel(true);
// 设置当前的消费者数量
// container.setMaxConcurrentConsumers(5);
container.setConcurrentConsumers(1);
// 设置确认模式手工确认
container.setAcknowledgeMode(AcknowledgeMode.MANUAL);
container.setMessageListener(new ChannelAwareMessageListener() {
@Override
public void onMessage(Message message, Channel channel) throws Exception {
byte[] body = message.getBody();
System.out.println("1 receive msg : " + JSONObject.parseObject(new String(body)));
// 确认消息成功消费，删除消息队列中的消息，他跟上面貌似一样
channel.basicAck(message.getMessageProperties().getDeliveryTag(), true);
}
});
return container;
}
}
2.自动应答SimpleMessageListener
该方法会直接应答，核心代码如下：container.setAcknowledgeMode(AcknowledgeMode.AUTO);
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;
import org.springframework.amqp.support.ConsumerTagStrategy;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import com.alibaba.fastjson.JSONObject;
import com.rabbitmq.client.Channel;
import org.springframework.context.annotation.Configuration;
@Configuration
public class SimpleMessageListener {
@Bean
public SimpleMessageListenerContainer messageContainer2(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
// 设置当前消费者数量
container.setConcurrentConsumers(1);
// 设置最大的消费者数量
container.setMaxConcurrentConsumers(5);
// 设置不要重回队列
container.setDefaultRequeueRejected(false);
// 设置自动签收
container.setAcknowledgeMode(AcknowledgeMode.AUTO);
// 设置消费端tag策略
container.setConsumerTagStrategy(new ConsumerTagStrategy() {
@Override
public String createConsumerTag(String queue) {
return queue + "_" + System.currentTimeMillis();
}
});
// 设置监听
container.setMessageListener(new ChannelAwareMessageListener() {
@Override
public void onMessage(Message message, Channel channel) throws Exception {
// 消息处理
String msg = new String(message.getBody(), "UTF-8");
System.out.println("---消费者---队列名：" + message.getMessageProperties().getConsumerQueue() + "，消息：" + msg
- ",deliveryTag：" + message.getMessageProperties().getDeliveryTag());
