1.rabbitmq快速入门

1.安装

下载

erlang-19.0.4-1.el7.centos.x86_64.rpm
https://www.rabbitmq.com/releases/erlang/
http://erlang.org/download/
http://repo.iotti.biz/CentOS/7/x86_64/socat-1.7.3.2-5.el7.lux.x86_64.rpm
https://www.rabbitmq.com/install-rpm.html#downloads
注意erlang版本对应rabbitmq版本

1.erlang安装
curl -s https://packagecloud.io/install/repositories/rabbitmq/erlang/script.rpm.sh | sudo bash
yum install -y erlang
elk
2.socat安装
wget http://repo.iotti.biz/CentOS/7/x86_64/socat-1.7.3.2-5.el7.lux.x86_64.rpm
rpm -ivh socat-1.7.3.2-5.el7.lux.x86_64.rpm
3.rabbitmq
wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.10/rabbitmq-server-3.8.10-1.el8.noarch.rpm
rpm -ivh rabbitmq-server-3.8.10-1.el7.noarch.rpm
4.开启插件
rabbitmq-plugins enable rabbitmq_management
5.重启
systemctl restart rabbitmq-server.service
6.查看运行状态
systemctl status rabbitmq-server.service

7.控制台访问
http://192.168.0.104:15672/
guest/guest 
8.报错error:User can only log in via localhost
添加用户
rabbitmqctl add_user admin admin
rabbitmqctl set_user_tags admin administrator
rabbitmqctl set_permissions -p / admin "." "." ".*"
systemctl restart rabbitmq-server
使用admin/admin登陆控制台
安装ok

2.java代码demo

演示第一种

image.png

2.1 生产者

public class ConnUtils {

    public static ConnectionFactory getConnection() {
        ConnectionFactory con = new ConnectionFactory();
        con.setPort(5672);
        con.setHost("192.168.43.84");
        con.setUsername("ems");
        con.setPassword("ems");
        con.setVirtualHost("/ems");
        return con;
    }
}


public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory con = ConnUtils.getConnection();

        // 创建连接对象
        Connection connection = con.newConnection();
        // 创建通道
        Channel channel = connection.createChannel();

        /**
         * 1. 队列名称
         * 2.是否持久化
         * 3.是否独占队列
         * 4.是否消费完后自动删除队列
         * 5.额外参数
         */
        channel.queueDeclare("hello", false, false, false, null);

        // 1.交换机 2.队列名 3.传递消息额外设置 4.消息具体内容
        channel.basicPublish("","hello", MessageProperties.PERSISTENT_TEXT_PLAIN,
            "hello word".getBytes(StandardCharsets.UTF_8));

        channel.close();
        connection.close();
        con.clone();
    }

image.png

2.3.消费者

public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory con = ConnUtils.getConnection();
        // 创建连接对象
        Connection connection = con.newConnection();
        // 创建通道
        Channel channel = connection.createChannel();
        channel.basicPublish("","hello",null,"hello word".getBytes(StandardCharsets.UTF_8));

        // 1.消费队列名称 2.开始消息自动确认机制 3.消费时回调接口
        channel.basicConsume("hello", true, new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope,
                AMQP.BasicProperties properties, byte[] body) throws IOException {
              //  super.handleDelivery(consumerTag, envelope, properties, body);
                System.out.println("消息内容:"+new String(body));
            }
        });

        // channel.close();
        // connection.close();
        // con.clone();
    }

image.png