rabbitmq的学习2

  代码中有注解可参考

  rabbitmq的学习2

 1.引入相关的maven依赖

     <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit-test</artifactId>
            <scope>test</scope>
        </dependency>

2. 配置文件

# rabbitmq配置信息
# ip
spring.rabbitmq.host=192.168.14.200
# 端口
spring.rabbitmq.port=5672
# 用户名
spring.rabbitmq.username=guest
# 密码
spring.rabbitmq.password=guest

3.启动类

package com.lh.springboot;

import org.springframework.amqp.rabbit.annotation.EnableRabbit;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/*

    1. 自动配置 RabbitAutoConfiguration 类
    2. 又自动配置了 连接工厂 ConnectionFactory
    3. RabbitProperties 封装了 Rabbitmq的所有配置
    4. RabbitTemplate 给Rabbitmq 发送和接收信息的
    5. AmqpAdmin 是rabbitmq 的系统管理功能组件
       AmqpAdmin  创建和删除 Queues、Exchanges、 Bindings
    6. @EnableRabbit + @RabbitListener 监听消息队列的内容

 */

@SpringBootApplication
@EnableRabbit   //开启基于注解的Rabbitmq模式
public class Springbootweb03Application {

    public static void main(String[] args) {
        SpringApplication.run(Springbootweb03Application.class, args);
    }

}

4.config.RabbitmqConfig 类

package com.lh.springboot.config;

import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @program: springbootweb03
 * @description: rabbitmq的配置类
 * @author: li hui
 * @create: 2020-12-22 15:25
 */
@Configuration
public class RabbitmqConfig {
    @Bean
    public MessageConverter messageConverter(){
        //new Jackson2JsonMessageConverter() 将发送的信息已JSON发送
        return new Jackson2JsonMessageConverter();
    }
}

5.bean.Book类

package com.lh.springboot.bean;

/**
 * @program: springbootweb03
 * @description:
 * @author: li hui
 * @create: 2020-12-22 15:37
 */
public class Book {
    private String bookName;
    private  String author;


    public Book() {
    }

    public Book(String bookName, String author) {
        this.bookName = bookName;
        this.author = author;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }
}

6.测试类

package com.lh.springboot;

import com.lh.springboot.bean.Book;
import org.junit.jupiter.api.Test;
import org.springframework.amqp.core.AmqpAdmin;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.DirectExchange;
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 java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@SpringBootTest
class Springbootweb03ApplicationTests {

@Autowired
private RabbitTemplate rabbitTemplate;

@Autowired
private AmqpAdmin amqpAdmin;

//AmqpAdmin 是rabbitmq 的系统管理功能组件
//AmqpAdmin 创建和删除 Queues、Exchanges、 Bindings
@Test
void createExchange(){
//创建DirectExchange
/* amqpAdmin.declareExchange(new DirectExchange("amqpAdmin.exchange"));
System.out.println("创建完成");*/

//创建队列
//amqpAdmin.declareQueue(new Queue("amqpAdmin.queue",true));

//创建绑定规则
/*amqpAdmin.declareBinding(new Binding("amqpAdmin.queue", Binding.DestinationType.QUEUE,
"amqpAdmin.exchange","amqpAdmin.haha",null));
*/

//删除
amqpAdmin.deleteQueue("huige.news");
}

/*
1.点播 (点对点)

*/
//发送信息
@Test
void contextLoads() {
/**
* @Author: li hui
* @Param: []
* @return: void
* @date: 2020/12/22
* @Description:
*
* 两个方法都可以做到发送消息
* rabbitTemplate.send(exchange,routingKey,message);
* rabbitTemplate.convertAndSend(exchange,routingKey,object);
*
* exchange: 交换器
* routingKey: 路由件
* message: 发送的消息 自己构造的一个;定义消息内容和消息头
* object: 对象 默认当成消息体 只需要传入发送的对象 自动序列化发送给Rabbitmq
*/
Map<String,Object> map = new HashMap<>();
map.put("msg","第一个消息");
map.put("data", Arrays.asList("hello world !!", 123, true));
//对象被默认序列化以后发送出去
rabbitTemplate.convertAndSend("exchange.direct","hui",map);


}


//接收消息,如何将数据自动的转为JSON发送出去
@Test
void receive(){
Object hui = rabbitTemplate.receiveAndConvert("hui");
System.out.println(hui);
}


/*
1.广播

*/
// 交换器 fanout 类型 发送信息
@Test
void senMsg(){
rabbitTemplate.convertAndSend("exchange.fanout","",new Book("红楼梦","曹雪芹"));
}

}

监听 消息对列

BookServicer 类

package com.lh.springboot.service;

import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;

import java.util.Map;

/**
* @program: springbootweb03
* @description:
* @author: li hui
* @create: 2020-12-22 15:47
*/
@Service
public class BookService {

@RabbitListener(queues = {"hui","hui.news","hui.emps","lihui.news"}) // queues 监听消息队列 是一个数组的方式
public void receive(Map map){
System.out.println("收到的消息:"+ map.toString());
}

}

启动主程序类 , 利用测试类 发送信息查看 主程序中是否有监听到

 

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