springBoot整合rabbitMQ的方法详解_Java教程

引入pom

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.5</version>
<relativePath/>
</parent>
<groupId>com.wxy</groupId>
<artifactId>test-rabbitmq</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>test-rabbitmq</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

测试

默认消息转换类型

###############在RabbitTemplate默认使用的是SimpleMessageConverter#######
private MessageConverter messageConverter = new SimpleMessageConverter();
###############源码：使用SerializationUtils.deserialize###############
public Object fromMessage(Message message) throws MessageConversionException {
Object content = null;
MessageProperties properties = message.getMessageProperties();
if (properties != null) {
String contentType = properties.getContentType();
if (contentType != null && contentType.startsWith("text")) {
String encoding = properties.getContentEncoding();
if (encoding == null) {
encoding = this.defaultCharset;
}
try {
content = new String(message.getBody(), encoding);
} catch (UnsupportedEncodingException var8) {
throw new MessageConversionException("failed to convert text-based Message content", var8);
}
} else if (contentType != null && contentType.equals("application/x-java-serialized-object")) {
try {
content = SerializationUtils.deserialize(this.createObjectInputStream(new ByteArrayInputStream(message.getBody()), this.codebaseUrl));
} catch (IllegalArgumentException | IllegalStateException | IOException var7) {
throw new MessageConversionException("failed to convert serialized Message content", var7);
}
}
}

springBoot整合rabbitMQ的方法详解

将默认消息类型转化成自定义json格式

第一：上面SimpleMessageConverter是org.springframework.amqp.support.converter包下MessageConverter接口的一个实现类
第二：查看该接口MessageConverter下支持哪些消息转化
ctrl+H查看该接口中的所有实现类
第三步：找到json相关的convert

springBoot整合rabbitMQ的方法详解

RabbitTemplateConfigurer中定义if (this.messageConverter != null)则使用配置的messageConverter

################## if (this.messageConverter != null)则使用配置的messageConverter
public void configure(RabbitTemplate template, ConnectionFactory connectionFactory) {
PropertyMapper map = PropertyMapper.get();
template.setConnectionFactory(connectionFactory);
if (this.messageConverter != null) {
template.setMessageConverter(this.messageConverter);
}
template.setMandatory(this.determineMandatoryFlag());
Template templateProperties = this.rabbitProperties.getTemplate();
if (templateProperties.getRetry().isEnabled()) {
template.setRetryTemplate((new RetryTemplateFactory(this.retryTemplateCustomizers)).createRetryTemplate(templateProperties.getRetry(), Target.SENDER));
}
templateProperties.getClass();
map.from(templateProperties::getReceiveTimeout).whenNonNull().as(Duration::toMillis).to(template::setReceiveTimeout);
templateProperties.getClass();
map.from(templateProperties::getReplyTimeout).whenNonNull().as(Duration::toMillis).to(template::setReplyTimeout);
templateProperties.getClass();
map.from(templateProperties::getExchange).to(template::setExchange);
templateProperties.getClass();
map.from(templateProperties::getRoutingKey).to(template::setRoutingKey);
templateProperties.getClass();
map.from(templateProperties::getDefaultReceiveQueue).whenNonNull().to(template::setDefaultReceiveQueue);
}

配置一个messageConversert(org.springframework.amqp.support.converter包中的)

再次发送消息体json格式

springBoot整合rabbitMQ的方法详解

使用注解@RabbitListener监听

监听多个队列

监听单个队列

在程序中创建队列，交换器，并进行绑定

@Test
public void create() {
//创建一个点对点的交换器
amqpAdmin.declareExchange(new DirectExchange("amqpexchange.direct"));
//创建一个队列
// String name,：队列名称
// boolean durable :持久化
amqpAdmin.declareQueue(new Queue("amqp.queue",true));
//绑定
//String destination, Binding.DestinationType destinationType, String exchange, String routingKey
// @Nullable Map<String, Object> arguments
amqpAdmin.declareBinding(new Binding("amqp.queue", Binding.DestinationType.QUEUE,
"amqpexchange.direct","wxy.news", null));
}