rabbitmq生产者代码,以及过程参数含义:

首先pom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">
    <parent>
        <artifactId>springcloudparent</artifactId>
        <groupId>com.cxy</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>rabbitMqConsumer</artifactId>
    <dependencies>
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>5.4.3</version>
        </dependency>
    </dependencies>

</project>

生产者代码:

package com.cxy.producer;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

/***
 * @ClassName: Producer1
 * @Description:
 * @Auther: cxy
 * @Date: 2019/3/24:11:38
 * @version : V1.0
 */
public class Producer1 {

    private  static  final  String Queue="helloworld";

    public static void main(String[] args) {
        ConnectionFactory connectionFactory= new ConnectionFactory();
        //设置连接地址
        connectionFactory.setHost("192.168.230.134");
        //设置端口
        connectionFactory.setPort(5672);
        //设置密码用户名
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        //设置虚拟机,每个虚拟机相当于一个小的mq
        connectionFactory.setVirtualHost("/");
        Connection connection =null;
        try {
            //建立连接
            connection = connectionFactory.newConnection();
            //建立通道,生产着和消费者都是在通道中完成
            Channel channel = connection.createChannel();
            /*
            queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete,
                                 Map<String, Object> arguments)
             参数1,声明队列
             参数2 是否持久化
             参数3 是否排他,是否独战连接,队列只允许该链接中访问,如果连接关闭,队列也就删除了
             参数4:是否自动删除,如果将此参数设置true,那么就变成零时队列
             参数5 :扩展参数,例如存活时间
           */
            channel.queueDeclare(Queue,true,false,false,null);
            //所有的队列需要制定默认的交换机
            /* basicPublish(String exchange, String routingKey, boolean mandatory, boolean immediate, BasicProperties props, byte[] body)
            throws IOException;
            参数1: 交换机,如果使用默认交换机,那么就为空,不可以设置为null
            参数二:路由key.交换机根据key来将消息发送到制定搞得队列,如果私用默认交互机,就应该设置为队列名称

            */
            String message="hello maxchen";
            channel.basicPublish(null,Queue,null,message.getBytes());
            System.out.println("send xiaoxi");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }

    }
}

运行为报错L:

Exception in thread "main" java.lang.IllegalStateException: Invalid configuration: 'exchange' must be non-null.
    at com.rabbitmq.client.impl.AMQImpl$Basic$Publish.<init>(AMQImpl.java:3195)
    at com.rabbitmq.client.AMQP$Basic$Publish$Builder.build(AMQP.java:1219)
    at com.rabbitmq.client.impl.ChannelN.basicPublish(ChannelN.java:702)
    at com.rabbitmq.client.impl.ChannelN.basicPublish(ChannelN.java:679)
    at com.rabbitmq.client.impl.ChannelN.basicPublish(ChannelN.java:669)
    at com.rabbitmq.client.impl.recovery.AutorecoveringChannel.basicPublish(AutorecoveringChannel.java:192)
    at com.cxy.producer.Producer1.main(Producer1.java:56)

处理方法:

再看管控台: