五种消息模型简单说明
RabbitMQ提供了6种消息模型,但是第6种其实是RPC,并不是MQ,因此不予学习。那么也就剩下5种。但是其实3、4、5这三种都属于订阅模型,只不过进行路由的方式不同。
我们通过一个demo工程来了解下RabbitMQ的工作方式,导入工程:
依赖:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.atguigu.rabbitmq</groupId>
<artifactId>rabbitmq-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
</dependencies>
</project>
我们抽取一个建立RabbitMQ连接的工具类,方便其他程序获取连接:
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import java.io.IOException;
public class ConnectionUtil {
/**
* 建立与RabbitMQ的连接
*/
public static Connection getConnection() throws Exception {
//定义连接工厂
ConnectionFactory factory = new ConnectionFactory();
//设置服务地址
factory.setHost("192.168.137.137");
//端口
factory.setPort(5672);
//设置账号信息,用户名、密码、vhost
factory.setVirtualHost("/shopping");
factory.setUsername("zhangsan");
factory.setPassword("123456");
// 通过工程获取连接
Connection connection = factory.newConnection();
return connection;
}
public static void main(String[] args) throws Exception {
Connection con = ConnectionUtil.getConnection();
System.out.println(con);
con.close();
}
}