• java中使用rabbitmq

    文章目录

    前言

    mq常用于业务解耦、流量削峰和异步通信,rabbitmq是使用范围较广,比较稳定的一款开源产品,接下来我们使用springboot的starter来引入rabbitmq,了解mq的几种使用模式,通过几个简单的案例，让你可以快速地了解到该使用哪种模式来对应业务场景，使用rabbitmq看这一篇就够了，下方附安装链接。

    一、引入和配置

    1.引入

    Spring AMQP高级消息队列协议有两部分组成,spring-amqp是基础抽象，spring-rabbit是RabbitMQ实现。

    <dependency>
	<groupId>org.springframework.bootgroupId>
	<artifactId>spring-boot-starter-amqpartifactId>
dependency>

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    在这里插入图片描述

    2.配置

    配置参考RabbitProperties.java

    spring:
  rabbitmq:
    host: 192.168.137.192
    port: 5672
    username: guest
    password: guest
    virtualHost: /

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    二、使用

    1.队列

    在这里插入图片描述
    RabbitConfiguration

    package com.student.rabbit.queue;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Bean;
import org.springframework.amqp.core.Queue;
/**
 * Create by zjg on 2024/3/9
 */
@Configuration
public class RabbitConfiguration {
    protected final String queueName = "queue";
    @Bean
    public Queue queue() {
        return new Queue(this.queueName);
    }
}


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    Producer

    package rabbit.queue;

import com.student.SpringbootStart;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * Create by zjg on 2024/3/9
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class)
public class Producer {
    @Autowired
    private RabbitTemplate template;
    @Autowired
    private Queue queue;

    AtomicInteger count = new AtomicInteger(0);
    @Test
    public void send() {
        for (int i = 0; i < 10; i++) {
            StringBuilder builder = new StringBuilder("Hello");
            builder.append(" "+count.incrementAndGet());
            String message = builder.toString();
            template.convertAndSend(queue.getName(), message);
            System.out.println(" [x] Sent '" + message + "'");
        }
    }
}


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    Consumer

    package com.student.rabbit.queue;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * Create by zjg on 2024/3/9
 */
@Component
public class Consumer {
    private static final Logger log = LoggerFactory.getLogger(Consumer.class);
    protected final String queueName = "queue";
    @RabbitListener(queues = queueName)
    public void receive1(String message){
        log.debug("receive1:"+message);
    }
    @RabbitListener(queues = queueName)
    public void receive2(String message){
        log.debug("receive2:"+message);
    }
}


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    每个队列都消费了5条消息
    在这里插入图片描述

    2.发布/订阅

    交换机类型有fanout,direct, topic, headers四种,接下来我们来学习每种方式的使用以及它们的区别。

    2.1 fanout(广播)

    P(生产者)产生消息给到X(交换机)，X分发给绑定的所有队列。

    在这里插入图片描述

    RabbitFanoutConfiguration
    我们定义了AnonymousQueue，它创建了一个具有生成名称的非持久、独占、自动删除队列

    package com.student.rabbit.fanout;

import org.springframework.amqp.core.AnonymousQueue;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Create by zjg on 2024/3/10
 */
@Configuration
public class RabbitFanoutConfiguration {
    @Bean
    public FanoutExchange fanout() {
        return new FanoutExchange("sys.fanout");
    }
    private static class ReceiverConfig {
        @Bean
        public Queue fanoutQueue1() {
            return new AnonymousQueue();
        }
        @Bean
        public Queue fanoutQueue2() {
            return new AnonymousQueue();
        }
        @Bean
        public Binding bindingFanout1(FanoutExchange fanout,Queue fanoutQueue1) {
            return BindingBuilder.bind(fanoutQueue1).to(fanout);
        }
        @Bean
        public Binding bindingFanout2(FanoutExchange fanout,Queue fanoutQueue2) {
            return BindingBuilder.bind(fanoutQueue2).to(fanout);
        }
    }
}



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    FanoutProducer

    package rabbit.fanout;

import com.student.SpringbootStart;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Create by zjg on 2024/3/10
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class)
public class FanoutProducer {
    @Autowired
    private RabbitTemplate template;
    @Autowired
    private FanoutExchange fanout;
    @Test
    public void send() {
        AtomicInteger count = new AtomicInteger(0);
        for (int i = 0; i < 10; i++) {
            StringBuilder builder = new StringBuilder("Hello");
            builder.append(" "+count.incrementAndGet());
            String message = builder.toString();
            template.convertAndSend(fanout.getName(), "", message);
            System.out.println(" [x] Sent '" + message + "'");
        }
    }
}


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    FanoutConsumer

    package com.student.rabbit.fanout;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * Create by zjg on 2024/3/10
 */
@Component
public class FanoutConsumer {
    private static final Logger log = LoggerFactory.getLogger(FanoutConsumer.class);
    @RabbitListener(queues = "#{fanoutQueue1.name}")
    public void receive1(String message){
        log.debug("receive1:"+message);
    }
    @RabbitListener(queues = "#{fanoutQueue2.name}")
    public void receive2(String message){
        log.debug("receive2:"+message);
    }
}


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    总共发送10条消息，每个队列都消费了10条
    在这里插入图片描述

    2.2 direct(Routing/路由)

    可以将根据不同的路由规则分发消息，很灵活，消费者需要哪种就订阅哪种消息。

    在这里插入图片描述
    在这里插入图片描述
    RabbitDirectConfiguration

    package com.student.rabbit.direct;

import org.springframework.amqp.core.AnonymousQueue;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Create by zjg on 2024/3/10
 */
@Configuration
public class RabbitDirectConfiguration {
    @Bean
    public DirectExchange direct() {
        return new DirectExchange("sys.direct");
    }

    private static class ReceiverConfig {
        @Bean
        public Queue directQueue1() {
            return new AnonymousQueue();
        }
        @Bean
        public Queue directQueue2() {
            return new AnonymousQueue();
        }
        @Bean
        public Binding bindingDirect1a(DirectExchange direct,Queue directQueue1) {
            return BindingBuilder.bind(directQueue1).to(direct).with("orange");
        }
        @Bean
        public Binding bindingDirect1b(DirectExchange direct,Queue directQueue1) {
            return BindingBuilder.bind(directQueue1).to(direct).with("black");
        }
        @Bean
        public Binding bindingDirect2a(DirectExchange direct,Queue directQueue2) {
            return BindingBuilder.bind(directQueue2).to(direct).with("green");
        }
        @Bean
        public Binding bindingDirect2b(DirectExchange direct,Queue directQueue2) {
            return BindingBuilder.bind(directQueue2).to(direct).with("black");
        }
    }
}



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    DirectProducer

    package rabbit.direct;

import com.student.SpringbootStart;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Create by zjg on 2024/3/10
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class)
public class DirectProducer {
    @Autowired
    private RabbitTemplate template;
    @Autowired
    private DirectExchange direct;
    private final String[] keys = {"orange", "black", "green"};
    @Test
    public void send() {
        AtomicInteger count = new AtomicInteger(0);
        for (int i = 0; i < keys.length; i++) {
            StringBuilder builder = new StringBuilder("Hello to ");
            String key = keys[count.getAndIncrement()];
            builder.append(" "+key);
            String message = builder.toString();
            template.convertAndSend(direct.getName(), key, message);
            System.out.println(" [x] Sent '" + message + "'");
        }
    }
}


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    DirectConsumer

    package com.student.rabbit.direct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * Create by zjg on 2024/3/10
 */
@Component
public class DirectConsumer {
    private static final Logger log = LoggerFactory.getLogger(DirectConsumer.class);
    @RabbitListener(queues = "#{directQueue1.name}")
    public void receive1(String message){
        log.debug("receive1:"+message);
    }
    @RabbitListener(queues = "#{directQueue2.name}")
    public void receive2(String message){
        log.debug("receive2:"+message);
    }
}


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    共发送了3条消息,有两个队列都绑定了black，所以black的消息消费2次
    在这里插入图片描述

    2.3 Topics(主题)

    主题模式在路由的基础上增加了routingKey的模糊匹配。
    *（星）可以代替一个词。
    #（hash）可以代替零个或多个单词。

    在这里插入图片描述
    RabbitTopicConfiguration

    package com.student.rabbit.topic;

import org.springframework.amqp.core.AnonymousQueue;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Create by zjg on 2024/3/10
 */
@Configuration
public class RabbitTopicConfiguration {
    @Bean
    public TopicExchange topic() {
        return new TopicExchange("sys.topic");
    }

    private static class ReceiverConfig {
        @Bean
        public Queue topicQueue1() {
            return new AnonymousQueue();
        }
        @Bean
        public Queue topicQueue2() {
            return new AnonymousQueue();
        }
        @Bean
        public Binding bindingTopic1a(TopicExchange topic,Queue topicQueue1) {
            return BindingBuilder.bind(topicQueue1).to(topic).with("*.orange.*");
        }
        @Bean
        public Binding bindingTopic1b(TopicExchange topic,Queue topicQueue1) {
            return BindingBuilder.bind(topicQueue1).to(topic).with("*.*.rabbit");
        }
        @Bean
        public Binding bindingTopic2a(TopicExchange topic,Queue topicQueue2) {
            return BindingBuilder.bind(topicQueue2).to(topic).with("lazy.#");
        }
        @Bean
        public Binding bindingTopic2b(TopicExchange topic,Queue topicQueue2) {
            return BindingBuilder.bind(topicQueue2).to(topic).with("quick.brown.*");
        }
    }
}



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    TopicProducer

    package rabbit.topic;

import com.student.SpringbootStart;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Create by zjg on 2024/3/10
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class)
public class TopicProducer {
    @Autowired
    private RabbitTemplate template;
    @Autowired
    private TopicExchange topic;
    private final String[] keys = {"quick.orange.rabbit", "lazy.orange.elephant", "quick.orange.fox",
            "lazy.brown.fox", "lazy.pink.rabbit", "quick.brown.fox"};
    @Test
    public void send() {
        AtomicInteger count = new AtomicInteger(0);
        for (int i = 0; i < keys.length; i++) {
            StringBuilder builder = new StringBuilder("Hello to ");
            String key = keys[count.getAndIncrement()];
            builder.append(" "+key);
            String message = builder.toString();
            template.convertAndSend(topic.getName(), key, message);
            System.out.println(" [x] Sent '" + message + "'");
        }
    }
}


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    TopicConsumer

    package com.student.rabbit.topic;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * Create by zjg on 2024/3/10
 */
@Component
public class TopicConsumer {
    private static final Logger log = LoggerFactory.getLogger(TopicConsumer.class);
    @RabbitListener(queues = "#{topicQueue1.name}")
    public void receive1(String message){
        log.debug("receive1:"+message);
    }
    @RabbitListener(queues = "#{topicQueue2.name}")
    public void receive2(String message){
        log.debug("receive2:"+message);
    }
}


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    队列1匹配了中间值为orange和rabbit结尾的消息，队列2匹配了lazy开头和quick.brown开头的消息
    在这里插入图片描述

    2.4 Headers

    关于headers模式，在官方没有找到文档，但包里还有，索性还是写一下吧。

    RabbitHeadersConfiguration

    package com.student.rabbit.headers;

import org.springframework.amqp.core.AnonymousQueue;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.HeadersExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;

/**
 * Create by zjg on 2024/3/10
 */
@Configuration
public class RabbitHeadersConfiguration {
    @Bean
    public HeadersExchange headers() {
        return new HeadersExchange("sys.headers");
    }

    private static class ReceiverConfig {
        @Bean
        public Queue headersQueue1() {
            return new AnonymousQueue();
        }
        @Bean
        public Queue headersQueue2() {
            return new AnonymousQueue();
        }
        @Bean
        public Queue headersQueue3() {
            return new AnonymousQueue();
        }
        @Bean
        public Binding bindingHeaders1(HeadersExchange headers,Queue headersQueue1) {
            Map<String,Object> headerValue=new HashMap<>();
            headerValue.put("user","sys");
            return BindingBuilder.bind(headersQueue1).to(headers).whereAll(headerValue).match();
        }
        @Bean
        public Binding bindingHeaders2(HeadersExchange headers,Queue headersQueue2) {
            Map<String,Object> headerValue=new HashMap<>();
            headerValue.put("user","admin");
            return BindingBuilder.bind(headersQueue2).to(headers).whereAll(headerValue).match();
        }
        @Bean
        public Binding bindingHeaders3(HeadersExchange headers,Queue headersQueue3) {
            return BindingBuilder.bind(headersQueue3).to(headers).where("user").exists();
        }
    }
}


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    HeadersProducer

    package rabbit.headers;

import com.student.SpringbootStart;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.HeadersExchange;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageBuilder;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Create by zjg on 2024/3/10
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootStart.class)
public class HeadersProducer {
    @Autowired
    private RabbitTemplate template;
    @Autowired
    private HeadersExchange headers;
    private final String[] keys = {"sys", "admin"};
    @Test
    public void send() {
        AtomicInteger count = new AtomicInteger(0);
        for (int i = 0; i < keys.length; i++) {
            StringBuilder builder = new StringBuilder("Hello to ");
            String key = keys[count.getAndIncrement()];
            builder.append(" "+key);
            MessageProperties messageProperties=new MessageProperties();
            messageProperties.setHeader("user",key);
            Message message = MessageBuilder.withBody(builder.toString().getBytes()).andProperties(messageProperties).build();
            template.send(headers.getName(), "", message);
            System.out.println(" [x] Sent '" + message + "'");
        }
    }
}


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    HeadersConsumer

    package com.student.rabbit.headers;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

/**
 * Create by zjg on 2024/3/10
 */
@Component
public class HeadersConsumer {
    private static final Logger log = LoggerFactory.getLogger(HeadersConsumer.class);
    @RabbitListener(queues = "#{headersQueue1.name}")
    public void receive1(Message message){
        log.debug("receive1:"+new String(message.getBody()));
    }
    @RabbitListener(queues = "#{headersQueue2.name}")
    public void receive2(Message message){
        log.debug("receive2:"+new String(message.getBody()));
    }
    @RabbitListener(queues = "#{headersQueue3.name}")
    public void receive3(Message message){
        log.debug("receive3:"+new String(message.getBody()));
    }
}


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    第一个队列接收sys消息，第二个队列接收admin消息，第三个队列只要包含user头的消息都接收。
    在这里插入图片描述

    总结

    回到顶部
    安装看这里
    官方文档
    官方网站
    其他项目，可参考官方案例
    路漫漫其修远兮，吾将上下而求索。

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  • 原文地址：https://blog.csdn.net/qq_44824164/article/details/136591641